diff --git a/contrib/prometheus-exporter/service-prometheus.c b/contrib/prometheus-exporter/service-prometheus.c
new file mode 100644
index 0000000..d61d94f
--- /dev/null
+++ b/contrib/prometheus-exporter/service-prometheus.c
@@ -0,0 +1,2284 @@
+/*
+ * Promex is a Prometheus exporter for HAProxy
+ *
+ * It is highly inspired by the official Prometheus exporter.
+ * See: https://github.com/prometheus/haproxy_exporter
+ *
+ * Copyright 2019 Christopher Faulet <cfaulet@haproxy.com>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version
+ * 2 of the License, or (at your option) any later version.
+ *
+ */
+
+#include <common/cfgparse.h>
+#include <common/config.h>
+#include <common/buffer.h>
+#include <common/htx.h>
+#include <common/initcall.h>
+#include <common/memory.h>
+#include <common/mini-clist.h>
+
+#include <types/global.h>
+
+#include <proto/action.h>
+#include <proto/applet.h>
+#include <proto/backend.h>
+#include <proto/compression.h>
+#include <proto/frontend.h>
+#include <proto/listener.h>
+#include <proto/http_htx.h>
+#include <proto/pipe.h>
+#include <proto/proxy.h>
+#include <proto/sample.h>
+#include <proto/server.h>
+#include <proto/ssl_sock.h>
+#include <proto/stats.h>
+#include <proto/stream.h>
+#include <proto/stream_interface.h>
+#include <proto/task.h>
+
+/* Prometheus exporter applet states (appctx->st0) */
+enum {
+        PROMEX_ST_INIT = 0,  /* initialized */
+        PROMEX_ST_HEAD,      /* send headers before dump */
+        PROMEX_ST_DUMP,      /* dumping stats */
+        PROMEX_ST_DONE,      /* finished */
+        PROMEX_ST_ERROR,     /* unrecoverable error occurred */
+};
+
+/* Prometheus exporter dumper states (appctx->st1) */
+enum {
+        PROMEX_DUMPER_INIT = 0, /* initialized */
+        PROMEX_DUMPER_GLOBAL,   /* dump metrics of globals */
+        PROMEX_DUMPER_FRONT,    /* dump metrics of frontend proxies */
+        PROMEX_DUMPER_BACK,     /* dump metrics of backend proxies */
+        PROMEX_DUMPER_LI,       /* dump metrics of listeners */
+        PROMEX_DUMPER_SRV,      /* dump metrics of servers */
+	PROMEX_DUMPER_DONE,     /* finished */
+};
+
+/* Prometheus exporter flags (appctx->ctx.stats.flags) */
+#define PROMEX_FL_METRIC_HDR    0x00000001
+#define PROMEX_FL_INFO_METRIC   0x00000002
+#define PROMEX_FL_STATS_METRIC  0x00000004
+
+/* The max length for metrics name. It is a hard limit but it should be
+ * enougth.
+ */
+#define PROMEX_MAX_NAME_LEN 128
+
+/* The expected max length for a metric dump, including its header lines. It is
+ * just a soft limit to avoid extra work. We don't try to dump a metric if less
+ * than this size is available in the HTX.
+ */
+#define PROMEX_MAX_METRIC_LENGTH 512
+
+/* Matrix used to dump global metrics. Each metric points to the next one to be
+ * processed or 0 to stop the dump. */
+const int promex_global_metrics[INF_TOTAL_FIELDS] = {
+	[INF_NAME]                           = INF_NBTHREAD,
+	[INF_VERSION]                        = 0,
+	[INF_RELEASE_DATE]                   = 0,
+	[INF_NBTHREAD]                       = INF_NBPROC,
+	[INF_NBPROC]                         = INF_PROCESS_NUM,
+	[INF_PROCESS_NUM]                    = INF_UPTIME_SEC,
+	[INF_PID]                            = 0,
+	[INF_UPTIME]                         = 0,
+	[INF_UPTIME_SEC]                     = INF_MEMMAX_MB,
+	[INF_MEMMAX_MB]                      = INF_POOL_ALLOC_MB,
+	[INF_POOL_ALLOC_MB]                  = INF_POOL_USED_MB,
+	[INF_POOL_USED_MB]                   = INF_POOL_FAILED,
+	[INF_POOL_FAILED]                    = INF_ULIMIT_N,
+	[INF_ULIMIT_N]                       = INF_MAXSOCK,
+	[INF_MAXSOCK]                        = INF_MAXCONN,
+	[INF_MAXCONN]                        = INF_HARD_MAXCONN,
+	[INF_HARD_MAXCONN]                   = INF_CURR_CONN,
+	[INF_CURR_CONN]                      = INF_CUM_CONN,
+	[INF_CUM_CONN]                       = INF_CUM_REQ,
+	[INF_CUM_REQ]                        = INF_MAX_SSL_CONNS,
+	[INF_MAX_SSL_CONNS]                  = INF_CURR_SSL_CONNS,
+	[INF_CURR_SSL_CONNS]                 = INF_CUM_SSL_CONNS,
+	[INF_CUM_SSL_CONNS]                  = INF_MAXPIPES,
+	[INF_MAXPIPES]                       = INF_PIPES_USED,
+	[INF_PIPES_USED]                     = INF_PIPES_FREE,
+	[INF_PIPES_FREE]                     = INF_CONN_RATE,
+	[INF_CONN_RATE]                      = INF_CONN_RATE_LIMIT,
+	[INF_CONN_RATE_LIMIT]                = INF_MAX_CONN_RATE,
+	[INF_MAX_CONN_RATE]                  = INF_SESS_RATE,
+	[INF_SESS_RATE]                      = INF_SESS_RATE_LIMIT,
+	[INF_SESS_RATE_LIMIT]                = INF_MAX_SESS_RATE,
+	[INF_MAX_SESS_RATE]                  = INF_SSL_RATE,
+	[INF_SSL_RATE]                       = INF_SSL_RATE_LIMIT,
+	[INF_SSL_RATE_LIMIT]                 = INF_MAX_SSL_RATE,
+	[INF_MAX_SSL_RATE]                   = INF_SSL_FRONTEND_KEY_RATE,
+	[INF_SSL_FRONTEND_KEY_RATE]          = INF_SSL_FRONTEND_MAX_KEY_RATE,
+	[INF_SSL_FRONTEND_MAX_KEY_RATE]      = INF_SSL_FRONTEND_SESSION_REUSE_PCT,
+	[INF_SSL_FRONTEND_SESSION_REUSE_PCT] = INF_SSL_BACKEND_KEY_RATE,
+	[INF_SSL_BACKEND_KEY_RATE]           = INF_SSL_BACKEND_MAX_KEY_RATE,
+	[INF_SSL_BACKEND_MAX_KEY_RATE]       = INF_SSL_CACHE_LOOKUPS,
+	[INF_SSL_CACHE_LOOKUPS]              = INF_SSL_CACHE_MISSES,
+	[INF_SSL_CACHE_MISSES]               = INF_COMPRESS_BPS_IN,
+	[INF_COMPRESS_BPS_IN]                = INF_COMPRESS_BPS_OUT,
+	[INF_COMPRESS_BPS_OUT]               = INF_COMPRESS_BPS_RATE_LIM,
+	[INF_COMPRESS_BPS_RATE_LIM]          = INF_ZLIB_MEM_USAGE,
+	[INF_ZLIB_MEM_USAGE]                 = INF_MAX_ZLIB_MEM_USAGE,
+	[INF_MAX_ZLIB_MEM_USAGE]             = INF_TASKS,
+	[INF_TASKS]                          = INF_RUN_QUEUE,
+	[INF_RUN_QUEUE]                      = INF_IDLE_PCT,
+	[INF_IDLE_PCT]                       = INF_STOPPING,
+	[INF_NODE]                           = 0,
+	[INF_DESCRIPTION]                    = 0,
+	[INF_STOPPING]                       = INF_JOBS,
+	[INF_JOBS]                           = INF_UNSTOPPABLE_JOBS,
+	[INF_UNSTOPPABLE_JOBS]               = INF_LISTENERS,
+	[INF_LISTENERS]                      = INF_ACTIVE_PEERS,
+	[INF_ACTIVE_PEERS]                   = INF_CONNECTED_PEERS,
+	[INF_CONNECTED_PEERS]                = INF_DROPPED_LOGS,
+	[INF_DROPPED_LOGS]                   = INF_BUSY_POLLING,
+	[INF_BUSY_POLLING]                   = 0,
+};
+
+/* Matrix used to dump frontend metrics. Each metric points to the next one to be
+ * processed or 0 to stop the dump. */
+const int promex_front_metrics[ST_F_TOTAL_FIELDS] = {
+	[ST_F_PXNAME]         = ST_F_STATUS,
+	[ST_F_SVNAME]         = 0,
+	[ST_F_QCUR]           = 0,
+	[ST_F_QMAX]           = 0,
+	[ST_F_SCUR]           = ST_F_SMAX,
+	[ST_F_SMAX]           = ST_F_SLIM,
+	[ST_F_SLIM]           = ST_F_STOT,
+	[ST_F_STOT]           = ST_F_RATE,
+	[ST_F_BIN]            = ST_F_BOUT,
+	[ST_F_BOUT]           = ST_F_DREQ,
+	[ST_F_DREQ]           = ST_F_DRESP,
+	[ST_F_DRESP]          = ST_F_EREQ,
+	[ST_F_EREQ]           = ST_F_DCON,
+	[ST_F_ECON]           = 0,
+	[ST_F_ERESP]          = 0,
+	[ST_F_WRETR]          = 0,
+	[ST_F_WREDIS]         = 0,
+	[ST_F_STATUS]         = ST_F_SCUR,
+	[ST_F_WEIGHT]         = 0,
+	[ST_F_ACT]            = 0,
+	[ST_F_BCK]            = 0,
+	[ST_F_CHKFAIL]        = 0,
+	[ST_F_CHKDOWN]        = 0,
+	[ST_F_LASTCHG]        = 0,
+	[ST_F_DOWNTIME]       = 0,
+	[ST_F_QLIMIT]         = 0,
+	[ST_F_PID]            = 0,
+	[ST_F_IID]            = 0,
+	[ST_F_SID]            = 0,
+	[ST_F_THROTTLE]       = 0,
+	[ST_F_LBTOT]          = 0,
+	[ST_F_TRACKED]        = 0,
+	[ST_F_TYPE]           = 0,
+	[ST_F_RATE]           = ST_F_RATE_LIM,
+	[ST_F_RATE_LIM]       = ST_F_RATE_MAX,
+	[ST_F_RATE_MAX]       = ST_F_CONN_RATE,
+	[ST_F_CHECK_STATUS]   = 0,
+	[ST_F_CHECK_CODE]     = 0,
+	[ST_F_CHECK_DURATION] = 0,
+	[ST_F_HRSP_1XX]       = ST_F_HRSP_2XX,
+	[ST_F_HRSP_2XX]       = ST_F_HRSP_3XX,
+	[ST_F_HRSP_3XX]       = ST_F_HRSP_4XX,
+	[ST_F_HRSP_4XX]       = ST_F_HRSP_5XX,
+	[ST_F_HRSP_5XX]       = ST_F_HRSP_OTHER,
+	[ST_F_HRSP_OTHER]     = ST_F_INTERCEPTED,
+	[ST_F_HANAFAIL]       = 0,
+	[ST_F_REQ_RATE]       = ST_F_REQ_RATE_MAX,
+	[ST_F_REQ_RATE_MAX]   = ST_F_REQ_TOT,
+	[ST_F_REQ_TOT]        = ST_F_HRSP_1XX,
+	[ST_F_CLI_ABRT]       = 0,
+	[ST_F_SRV_ABRT]       = 0,
+	[ST_F_COMP_IN]        = ST_F_COMP_OUT,
+	[ST_F_COMP_OUT]       = ST_F_COMP_BYP,
+	[ST_F_COMP_BYP]       = ST_F_COMP_RSP,
+	[ST_F_COMP_RSP]       = 0,
+	[ST_F_LASTSESS]       = 0,
+	[ST_F_LAST_CHK]       = 0,
+	[ST_F_LAST_AGT]       = 0,
+	[ST_F_QTIME]          = 0,
+	[ST_F_CTIME]          = 0,
+	[ST_F_RTIME]          = 0,
+	[ST_F_TTIME]          = 0,
+	[ST_F_AGENT_STATUS]   = 0,
+	[ST_F_AGENT_CODE]     = 0,
+	[ST_F_AGENT_DURATION] = 0,
+	[ST_F_CHECK_DESC]     = 0,
+	[ST_F_AGENT_DESC]     = 0,
+	[ST_F_CHECK_RISE]     = 0,
+	[ST_F_CHECK_FALL]     = 0,
+	[ST_F_CHECK_HEALTH]   = 0,
+	[ST_F_AGENT_RISE]     = 0,
+	[ST_F_AGENT_FALL]     = 0,
+	[ST_F_AGENT_HEALTH]   = 0,
+	[ST_F_ADDR]           = 0,
+	[ST_F_COOKIE]         = 0,
+	[ST_F_MODE]           = 0,
+	[ST_F_ALGO]           = 0,
+	[ST_F_CONN_RATE]      = ST_F_CONN_RATE_MAX,
+	[ST_F_CONN_RATE_MAX]  = ST_F_CONN_TOT,
+	[ST_F_CONN_TOT]       = ST_F_BIN,
+	[ST_F_INTERCEPTED]    = ST_F_CACHE_LOOKUPS,
+	[ST_F_DCON]           = ST_F_DSES,
+	[ST_F_DSES]           = ST_F_WREW,
+	[ST_F_WREW]           = ST_F_REQ_RATE,
+	[ST_F_CONNECT]        = 0,
+	[ST_F_REUSE]          = 0,
+	[ST_F_CACHE_LOOKUPS]  = ST_F_CACHE_HITS,
+	[ST_F_CACHE_HITS]     = ST_F_COMP_IN,
+};
+
+/* Matrix used to dump backend metrics. Each metric points to the next one to be
+ * processed or 0 to stop the dump. */
+const int promex_back_metrics[ST_F_TOTAL_FIELDS] = {
+	[ST_F_PXNAME]         = ST_F_STATUS,
+	[ST_F_SVNAME]         = 0,
+	[ST_F_QCUR]           = ST_F_QMAX,
+	[ST_F_QMAX]           = ST_F_CONNECT,
+	[ST_F_SCUR]           = ST_F_SMAX,
+	[ST_F_SMAX]           = ST_F_SLIM,
+	[ST_F_SLIM]           = ST_F_STOT,
+	[ST_F_STOT]           = ST_F_RATE,
+	[ST_F_BIN]            = ST_F_BOUT,
+	[ST_F_BOUT]           = ST_F_QTIME,
+	[ST_F_DREQ]           = ST_F_DRESP,
+	[ST_F_DRESP]          = ST_F_ECON,
+	[ST_F_EREQ]           = 0,
+	[ST_F_ECON]           = ST_F_ERESP,
+	[ST_F_ERESP]          = ST_F_WRETR,
+	[ST_F_WRETR]          = ST_F_WREDIS,
+	[ST_F_WREDIS]         = ST_F_WREW,
+	[ST_F_STATUS]         = ST_F_SCUR,
+	[ST_F_WEIGHT]         = ST_F_ACT,
+	[ST_F_ACT]            = ST_F_BCK,
+	[ST_F_BCK]            = ST_F_CHKDOWN,
+	[ST_F_CHKFAIL]        = 0,
+	[ST_F_CHKDOWN]        = ST_F_LASTCHG,
+	[ST_F_LASTCHG]        = ST_F_DOWNTIME,
+	[ST_F_DOWNTIME]       = ST_F_LBTOT,
+	[ST_F_QLIMIT]         = 0,
+	[ST_F_PID]            = 0,
+	[ST_F_IID]            = 0,
+	[ST_F_SID]            = 0,
+	[ST_F_THROTTLE]       = 0,
+	[ST_F_LBTOT]          = ST_F_REQ_TOT,
+	[ST_F_TRACKED]        = 9,
+	[ST_F_TYPE]           = 0,
+	[ST_F_RATE]           = ST_F_RATE_MAX,
+	[ST_F_RATE_LIM]       = 0,
+	[ST_F_RATE_MAX]       = ST_F_LASTSESS,
+	[ST_F_CHECK_STATUS]   = 0,
+	[ST_F_CHECK_CODE]     = 0,
+	[ST_F_CHECK_DURATION] = 0,
+	[ST_F_HRSP_1XX]       = ST_F_HRSP_2XX,
+	[ST_F_HRSP_2XX]       = ST_F_HRSP_3XX,
+	[ST_F_HRSP_3XX]       = ST_F_HRSP_4XX,
+	[ST_F_HRSP_4XX]       = ST_F_HRSP_5XX,
+	[ST_F_HRSP_5XX]       = ST_F_HRSP_OTHER,
+	[ST_F_HRSP_OTHER]     = ST_F_CACHE_LOOKUPS,
+	[ST_F_HANAFAIL]       = 0,
+	[ST_F_REQ_RATE]       = 0,
+	[ST_F_REQ_RATE_MAX]   = 0,
+	[ST_F_REQ_TOT]        = ST_F_HRSP_1XX,
+	[ST_F_CLI_ABRT]       = ST_F_SRV_ABRT,
+	[ST_F_SRV_ABRT]       = ST_F_WEIGHT,
+	[ST_F_COMP_IN]        = ST_F_COMP_OUT,
+	[ST_F_COMP_OUT]       = ST_F_COMP_BYP,
+	[ST_F_COMP_BYP]       = ST_F_COMP_RSP,
+	[ST_F_COMP_RSP]       = 0,
+	[ST_F_LASTSESS]       = ST_F_QCUR,
+	[ST_F_LAST_CHK]       = 0,
+	[ST_F_LAST_AGT]       = 0,
+	[ST_F_QTIME]          = ST_F_CTIME,
+	[ST_F_CTIME]          = ST_F_RTIME,
+	[ST_F_RTIME]          = ST_F_TTIME,
+	[ST_F_TTIME]          = ST_F_DREQ,
+	[ST_F_AGENT_STATUS]   = 0,
+	[ST_F_AGENT_CODE]     = 0,
+	[ST_F_AGENT_DURATION] = 0,
+	[ST_F_CHECK_DESC]     = 0,
+	[ST_F_AGENT_DESC]     = 0,
+	[ST_F_CHECK_RISE]     = 0,
+	[ST_F_CHECK_FALL]     = 0,
+	[ST_F_CHECK_HEALTH]   = 0,
+	[ST_F_AGENT_RISE]     = 0,
+	[ST_F_AGENT_FALL]     = 0,
+	[ST_F_AGENT_HEALTH]   = 0,
+	[ST_F_ADDR]           = 0,
+	[ST_F_COOKIE]         = 0,
+	[ST_F_MODE]           = 0,
+	[ST_F_ALGO]           = 0,
+	[ST_F_CONN_RATE]      = 0,
+	[ST_F_CONN_RATE_MAX]  = 0,
+	[ST_F_CONN_TOT]       = 0,
+	[ST_F_INTERCEPTED]    = 0,
+	[ST_F_DCON]           = 0,
+	[ST_F_DSES]           = 0,
+	[ST_F_WREW]           = ST_F_CLI_ABRT,
+	[ST_F_CONNECT]        = ST_F_REUSE,
+	[ST_F_REUSE]          = ST_F_BIN,
+	[ST_F_CACHE_LOOKUPS]  = ST_F_CACHE_HITS,
+	[ST_F_CACHE_HITS]     = ST_F_COMP_IN,
+};
+
+/* Matrix used to dump server metrics. Each metric points to the next one to be
+ * processed or 0 to stop the dump. */
+const int promex_srv_metrics[ST_F_TOTAL_FIELDS] = {
+	[ST_F_PXNAME]         = ST_F_STATUS,
+	[ST_F_SVNAME]         = 0,
+	[ST_F_QCUR]           = ST_F_QMAX,
+	[ST_F_QMAX]           = ST_F_QLIMIT,
+	[ST_F_SCUR]           = ST_F_SMAX,
+	[ST_F_SMAX]           = ST_F_SLIM,
+	[ST_F_SLIM]           = ST_F_STOT,
+	[ST_F_STOT]           = ST_F_RATE,
+	[ST_F_BIN]            = ST_F_BOUT,
+	[ST_F_BOUT]           = ST_F_QTIME,
+	[ST_F_DREQ]           = 0,
+	[ST_F_DRESP]          = ST_F_ECON,
+	[ST_F_EREQ]           = 0,
+	[ST_F_ECON]           = ST_F_ERESP,
+	[ST_F_ERESP]          = ST_F_WRETR,
+	[ST_F_WRETR]          = ST_F_WREDIS,
+	[ST_F_WREDIS]         = ST_F_WREW,
+	[ST_F_STATUS]         = ST_F_SCUR,
+	[ST_F_WEIGHT]         = ST_F_CHKFAIL,
+	[ST_F_ACT]            = 0,
+	[ST_F_BCK]            = 0,
+	[ST_F_CHKFAIL]        = ST_F_CHKDOWN,
+	[ST_F_CHKDOWN]        = ST_F_DOWNTIME,
+	[ST_F_LASTCHG]        = ST_F_THROTTLE,
+	[ST_F_DOWNTIME]       = ST_F_LASTCHG,
+	[ST_F_QLIMIT]         = ST_F_BIN,
+	[ST_F_PID]            = 0,
+	[ST_F_IID]            = 0,
+	[ST_F_SID]            = 0,
+	[ST_F_THROTTLE]       = ST_F_LBTOT,
+	[ST_F_LBTOT]          = ST_F_HRSP_1XX,
+	[ST_F_TRACKED]        = 0,
+	[ST_F_TYPE]           = 0,
+	[ST_F_RATE]           = ST_F_RATE_MAX,
+	[ST_F_RATE_LIM]       = 0,
+	[ST_F_RATE_MAX]       = ST_F_LASTSESS,
+	[ST_F_CHECK_STATUS]   = 0,
+	[ST_F_CHECK_CODE]     = 0,
+	[ST_F_CHECK_DURATION] = 0,
+	[ST_F_HRSP_1XX]       = ST_F_HRSP_2XX,
+	[ST_F_HRSP_2XX]       = ST_F_HRSP_3XX,
+	[ST_F_HRSP_3XX]       = ST_F_HRSP_4XX,
+	[ST_F_HRSP_4XX]       = ST_F_HRSP_5XX,
+	[ST_F_HRSP_5XX]       = ST_F_HRSP_OTHER,
+	[ST_F_HRSP_OTHER]     = 0,
+	[ST_F_HANAFAIL]       = 0,
+	[ST_F_REQ_RATE]       = 0,
+	[ST_F_REQ_RATE_MAX]   = 0,
+	[ST_F_REQ_TOT]        = 0,
+	[ST_F_CLI_ABRT]       = ST_F_SRV_ABRT,
+	[ST_F_SRV_ABRT]       = ST_F_WEIGHT,
+	[ST_F_COMP_IN]        = 0,
+	[ST_F_COMP_OUT]       = 0,
+	[ST_F_COMP_BYP]       = 0,
+	[ST_F_COMP_RSP]       = 0,
+	[ST_F_LASTSESS]       = ST_F_QCUR,
+	[ST_F_LAST_CHK]       = 0,
+	[ST_F_LAST_AGT]       = 0,
+	[ST_F_QTIME]          = ST_F_CTIME,
+	[ST_F_CTIME]          = ST_F_RTIME,
+	[ST_F_RTIME]          = ST_F_TTIME,
+	[ST_F_TTIME]          = ST_F_CONNECT,
+	[ST_F_AGENT_STATUS]   = 0,
+	[ST_F_AGENT_CODE]     = 0,
+	[ST_F_AGENT_DURATION] = 0,
+	[ST_F_CHECK_DESC]     = 0,
+	[ST_F_AGENT_DESC]     = 0,
+	[ST_F_CHECK_RISE]     = 0,
+	[ST_F_CHECK_FALL]     = 0,
+	[ST_F_CHECK_HEALTH]   = 0,
+	[ST_F_AGENT_RISE]     = 0,
+	[ST_F_AGENT_FALL]     = 0,
+	[ST_F_AGENT_HEALTH]   = 0,
+	[ST_F_ADDR]           = 0,
+	[ST_F_COOKIE]         = 0,
+	[ST_F_MODE]           = 0,
+	[ST_F_ALGO]           = 0,
+	[ST_F_CONN_RATE]      = 0,
+	[ST_F_CONN_RATE_MAX]  = 0,
+	[ST_F_CONN_TOT]       = 0,
+	[ST_F_INTERCEPTED]    = 0,
+	[ST_F_DCON]           = 0,
+	[ST_F_DSES]           = 0,
+	[ST_F_WREW]           = ST_F_CLI_ABRT,
+	[ST_F_CONNECT]        = ST_F_REUSE,
+	[ST_F_REUSE]          = ST_F_DRESP,
+	[ST_F_CACHE_LOOKUPS]  = 0,
+	[ST_F_CACHE_HITS]     = 0,
+};
+
+/* Name of all info fields */
+const struct ist promex_inf_metric_names[INF_TOTAL_FIELDS] = {
+	[INF_NAME]                           = IST("name"),
+	[INF_VERSION]                        = IST("version"),
+	[INF_RELEASE_DATE]                   = IST("release_date"),
+	[INF_NBTHREAD]                       = IST("nbthread"),
+	[INF_NBPROC]                         = IST("nbproc"),
+	[INF_PROCESS_NUM]                    = IST("relative_process_id"),
+	[INF_PID]                            = IST("pid"),
+	[INF_UPTIME]                         = IST("uptime"),
+	[INF_UPTIME_SEC]                     = IST("uptime_seconds"),
+	[INF_MEMMAX_MB]                      = IST("max_memory"),
+	[INF_POOL_ALLOC_MB]                  = IST("pool_allocated_total"),
+	[INF_POOL_USED_MB]                   = IST("pool_used_total"),
+	[INF_POOL_FAILED]                    = IST("pool_failures_total"),
+	[INF_ULIMIT_N]                       = IST("max_fds"),
+	[INF_MAXSOCK]                        = IST("max_sockets"),
+	[INF_MAXCONN]                        = IST("max_connections"),
+	[INF_HARD_MAXCONN]                   = IST("hard_max_connections"),
+	[INF_CURR_CONN]                      = IST("current_connections"),
+	[INF_CUM_CONN]                       = IST("connections_total"),
+	[INF_CUM_REQ]                        = IST("requests_total"),
+	[INF_MAX_SSL_CONNS]                  = IST("max_ssl_connections"),
+	[INF_CURR_SSL_CONNS]                 = IST("current_ssl_connections"),
+	[INF_CUM_SSL_CONNS]                  = IST("ssl_connections_total"),
+	[INF_MAXPIPES]                       = IST("max_pipes"),
+	[INF_PIPES_USED]                     = IST("pipes_used_total"),
+	[INF_PIPES_FREE]                     = IST("pipes_free_total"),
+	[INF_CONN_RATE]                      = IST("current_connection_rate"),
+	[INF_CONN_RATE_LIMIT]                = IST("limit_connection_rate"),
+	[INF_MAX_CONN_RATE]                  = IST("max_connection_rate"),
+	[INF_SESS_RATE]                      = IST("current_session_rate"),
+	[INF_SESS_RATE_LIMIT]                = IST("limit_session_rate"),
+	[INF_MAX_SESS_RATE]                  = IST("max_session_rate"),
+	[INF_SSL_RATE]                       = IST("current_ssl_rate"),
+	[INF_SSL_RATE_LIMIT]                 = IST("limit_ssl_rate"),
+	[INF_MAX_SSL_RATE]                   = IST("max_ssl_rate"),
+	[INF_SSL_FRONTEND_KEY_RATE]          = IST("current_frontend_ssl_key_rate"),
+	[INF_SSL_FRONTEND_MAX_KEY_RATE]      = IST("max_frontend_ssl_key_rate"),
+	[INF_SSL_FRONTEND_SESSION_REUSE_PCT] = IST("frontent_ssl_reuse"),
+	[INF_SSL_BACKEND_KEY_RATE]           = IST("current_backend_ssl_key_rate"),
+	[INF_SSL_BACKEND_MAX_KEY_RATE]       = IST("max_backend_ssl_key_rate"),
+	[INF_SSL_CACHE_LOOKUPS]              = IST("ssl_cache_lookups"),
+	[INF_SSL_CACHE_MISSES]               = IST("ssl_cache_misses"),
+	[INF_COMPRESS_BPS_IN]                = IST("http_comp_bytes_in_total"),
+	[INF_COMPRESS_BPS_OUT]               = IST("http_comp_bytes_out_total"),
+	[INF_COMPRESS_BPS_RATE_LIM]          = IST("limit_http_comp"),
+	[INF_ZLIB_MEM_USAGE]                 = IST("current_zlib_memory"),
+	[INF_MAX_ZLIB_MEM_USAGE]             = IST("max_zlib_memory"),
+	[INF_TASKS]                          = IST("current_tasks"),
+	[INF_RUN_QUEUE]                      = IST("current_run_queue"),
+	[INF_IDLE_PCT]                       = IST("idle_time_percent"),
+	[INF_NODE]                           = IST("node"),
+	[INF_DESCRIPTION]                    = IST("description"),
+	[INF_STOPPING]                       = IST("stopping"),
+	[INF_JOBS]                           = IST("jobs"),
+	[INF_UNSTOPPABLE_JOBS]               = IST("unstoppable_jobs"),
+	[INF_LISTENERS]                      = IST("listeners"),
+	[INF_ACTIVE_PEERS]                   = IST("active_peers"),
+	[INF_CONNECTED_PEERS]                = IST("connected_peers"),
+	[INF_DROPPED_LOGS]                   = IST("dropped_logs_total"),
+	[INF_BUSY_POLLING]                   = IST("busy_polling_enabled"),
+};
+
+/* Name of all stats fields */
+const struct ist promex_st_metric_names[ST_F_TOTAL_FIELDS] = {
+	[ST_F_PXNAME]         = IST("proxy_name"),
+	[ST_F_SVNAME]         = IST("service_name"),
+	[ST_F_QCUR]           = IST("current_queue"),
+	[ST_F_QMAX]           = IST("max_queue"),
+	[ST_F_SCUR]           = IST("current_sessions"),
+	[ST_F_SMAX]           = IST("max_sessions"),
+	[ST_F_SLIM]           = IST("limit_sessions"),
+	[ST_F_STOT]           = IST("sessions_total"),
+	[ST_F_BIN]            = IST("bytes_in_total"),
+	[ST_F_BOUT]           = IST("bytes_out_total"),
+	[ST_F_DREQ]           = IST("requests_denied_total"),
+	[ST_F_DRESP]          = IST("responses_denied_total"),
+	[ST_F_EREQ]           = IST("request_errors_total"),
+	[ST_F_ECON]           = IST("connection_errors_total"),
+	[ST_F_ERESP]          = IST("response_errors_total"),
+	[ST_F_WRETR]          = IST("retry_warnings_total"),
+	[ST_F_WREDIS]         = IST("redispatch_warnings_total"),
+	[ST_F_STATUS]         = IST("status"),
+	[ST_F_WEIGHT]         = IST("weight"),
+	[ST_F_ACT]            = IST("active_servers"),
+	[ST_F_BCK]            = IST("backup_servers"),
+	[ST_F_CHKFAIL]        = IST("check_failures_total"),
+	[ST_F_CHKDOWN]        = IST("check_up_down_total"),
+	[ST_F_LASTCHG]        = IST("check_last_change_seconds"),
+	[ST_F_DOWNTIME]       = IST("downtime_seconds_total"),
+	[ST_F_QLIMIT]         = IST("queue_limit"),
+	[ST_F_PID]            = IST("pid"),
+	[ST_F_IID]            = IST("proxy_id"),
+	[ST_F_SID]            = IST("server_id"),
+	[ST_F_THROTTLE]       = IST("current_throttle"),
+	[ST_F_LBTOT]          = IST("loadbalanced_total"),
+	[ST_F_TRACKED]        = IST("tracked"),
+	[ST_F_TYPE]           = IST("type"),
+	[ST_F_RATE]           = IST("current_session_rate"),
+	[ST_F_RATE_LIM]       = IST("limit_session_rate"),
+	[ST_F_RATE_MAX]       = IST("max_session_rate"),
+	[ST_F_CHECK_STATUS]   = IST("check_status"),
+	[ST_F_CHECK_CODE]     = IST("check_code"),
+	[ST_F_CHECK_DURATION] = IST("check_duration_milliseconds"),
+	[ST_F_HRSP_1XX]       = IST("http_responses_total"),
+	[ST_F_HRSP_2XX]       = IST("http_responses_total"),
+	[ST_F_HRSP_3XX]       = IST("http_responses_total"),
+	[ST_F_HRSP_4XX]       = IST("http_responses_total"),
+	[ST_F_HRSP_5XX]       = IST("http_responses_total"),
+	[ST_F_HRSP_OTHER]     = IST("http_responses_total"),
+	[ST_F_HANAFAIL]       = IST("check_analyses_failures_total"),
+	[ST_F_REQ_RATE]       = IST("http_requests_rate_current"),
+	[ST_F_REQ_RATE_MAX]   = IST("http_requests_rate_max"),
+	[ST_F_REQ_TOT]        = IST("http_requests_total"),
+	[ST_F_CLI_ABRT]       = IST("client_aborts_total"),
+	[ST_F_SRV_ABRT]       = IST("server_aborts_total"),
+	[ST_F_COMP_IN]        = IST("http_comp_bytes_in_total"),
+	[ST_F_COMP_OUT]       = IST("http_comp_bytes_out_total"),
+	[ST_F_COMP_BYP]       = IST("http_comp_bytes_bypassed_total"),
+	[ST_F_COMP_RSP]       = IST("http_comp_responses_total"),
+	[ST_F_LASTSESS]       = IST("last_session_seconds"),
+	[ST_F_LAST_CHK]       = IST("check_last_content"),
+	[ST_F_LAST_AGT]       = IST("agentcheck_last_content"),
+	[ST_F_QTIME]          = IST("http_queue_time_average_seconds"),
+	[ST_F_CTIME]          = IST("http_connect_time_average_seconds"),
+	[ST_F_RTIME]          = IST("http_response_time_average_seconds"),
+	[ST_F_TTIME]          = IST("http_total_time_average_seconds"),
+	[ST_F_AGENT_STATUS]   = IST("agentcheck_status"),
+	[ST_F_AGENT_CODE]     = IST("agentcheck_code"),
+	[ST_F_AGENT_DURATION] = IST("agentcheck_duration_milliseconds"),
+	[ST_F_CHECK_DESC]     = IST("check_description"),
+	[ST_F_AGENT_DESC]     = IST("agentcheck_description"),
+	[ST_F_CHECK_RISE]     = IST("check_rise"),
+	[ST_F_CHECK_FALL]     = IST("check_fall"),
+	[ST_F_CHECK_HEALTH]   = IST("check_value"),
+	[ST_F_AGENT_RISE]     = IST("agentcheck_rise"),
+	[ST_F_AGENT_FALL]     = IST("agentcheck_fall"),
+	[ST_F_AGENT_HEALTH]   = IST("agentcheck_value"),
+	[ST_F_ADDR]           = IST("address"),
+	[ST_F_COOKIE]         = IST("cookie"),
+	[ST_F_MODE]           = IST("mode"),
+	[ST_F_ALGO]           = IST("loadbalance_algorithm"),
+	[ST_F_CONN_RATE]      = IST("connections_rate_current"),
+	[ST_F_CONN_RATE_MAX]  = IST("connections_rate_max"),
+	[ST_F_CONN_TOT]       = IST("connections_total"),
+	[ST_F_INTERCEPTED]    = IST("intercepted_requests_total"),
+	[ST_F_DCON]           = IST("denied_connections_total"),
+	[ST_F_DSES]           = IST("denied_sessions_total"),
+	[ST_F_WREW]           = IST("failed_header_rewriting_total"),
+	[ST_F_CONNECT]        = IST("connection_attempts_total"),
+	[ST_F_REUSE]          = IST("connection_reuses_total"),
+	[ST_F_CACHE_LOOKUPS]  = IST("http_cache_lookups_total"),
+	[ST_F_CACHE_HITS]     = IST("http_cache_hits_total"),
+};
+
+/* Description of all info fields */
+const struct ist promex_inf_metric_desc[INF_TOTAL_FIELDS] = {
+	[INF_NAME]                           = IST("Product name."),
+	[INF_VERSION]                        = IST("HAProxy version."),
+	[INF_RELEASE_DATE]                   = IST("HAProxy realease date."),
+	[INF_NBTHREAD]                       = IST("Configured number of threads."),
+	[INF_NBPROC]                         = IST("Configured number of processes."),
+	[INF_PROCESS_NUM]                    = IST("Relative process id, starting at 1."),
+	[INF_PID]                            = IST("HAProxy PID."),
+	[INF_UPTIME]                         = IST("Uptime in a human readable format."),
+	[INF_UPTIME_SEC]                     = IST("Uptime in seconds."),
+	[INF_MEMMAX_MB]                      = IST("Per-process memory limit (in MB); 0=unset."),
+	[INF_POOL_ALLOC_MB]                  = IST("Total amount of memory allocated in pools (in MB)."),
+	[INF_POOL_USED_MB]                   = IST("Total amount of memory used in pools (in MB)."),
+	[INF_POOL_FAILED]                    = IST("Total number of failed pool allocations."),
+	[INF_ULIMIT_N]                       = IST("Maximum number of open file descriptors; 0=unset."),
+	[INF_MAXSOCK]                        = IST("Maximum numer of open sockets."),
+	[INF_MAXCONN]                        = IST("Maximum number of concurrent connections."),
+	[INF_HARD_MAXCONN]                   = IST("Initial Maximum number of concurrent connections."),
+	[INF_CURR_CONN]                      = IST("Number of active sessions."),
+	[INF_CUM_CONN]                       = IST("Total number of terminated sessions."),
+	[INF_CUM_REQ]                        = IST("Total number of requests (TCP or HTTP)."),
+	[INF_MAX_SSL_CONNS]                  = IST("Configured maximum number of concurrent SSL connections."),
+	[INF_CURR_SSL_CONNS]                 = IST("Number of opened SSL connections."),
+	[INF_CUM_SSL_CONNS]                  = IST("Total number of opened SSL connections."),
+	[INF_MAXPIPES]                       = IST("Configured maximum number of pipes."),
+	[INF_PIPES_USED]                     = IST("Number of pipes in used."),
+	[INF_PIPES_FREE]                     = IST("Number of pipes unused."),
+	[INF_CONN_RATE]                      = IST("Current number of connections per second over last elapsed second."),
+	[INF_CONN_RATE_LIMIT]                = IST("Configured maximum number of connections per second."),
+	[INF_MAX_CONN_RATE]                  = IST("Maximum observed number of connections per second."),
+	[INF_SESS_RATE]                      = IST("Current number of sessions per second over last elapsed second."),
+	[INF_SESS_RATE_LIMIT]                = IST("Configured maximum number of sessions per second."),
+	[INF_MAX_SESS_RATE]                  = IST("Maximum observed number of sessions per second."),
+	[INF_SSL_RATE]                       = IST("Current number of SSL sessions per second over last elapsed second."),
+	[INF_SSL_RATE_LIMIT]                 = IST("Configured maximum number of SSL sessions per second."),
+	[INF_MAX_SSL_RATE]                   = IST("Maximum observed number of SSL sessions per second."),
+	[INF_SSL_FRONTEND_KEY_RATE]          = IST("Current frontend SSL Key computation per second over last elapsed second."),
+	[INF_SSL_FRONTEND_MAX_KEY_RATE]      = IST("Maximum observed frontend SSL Key computation per second."),
+	[INF_SSL_FRONTEND_SESSION_REUSE_PCT] = IST("SSL session reuse ratio (percent)."),
+	[INF_SSL_BACKEND_KEY_RATE]           = IST("Current backend SSL Key computation per second over last elapsed second."),
+	[INF_SSL_BACKEND_MAX_KEY_RATE]       = IST("Maximum observed backend SSL Key computation per second."),
+	[INF_SSL_CACHE_LOOKUPS]              = IST("Total number of SSL session cache lookups."),
+	[INF_SSL_CACHE_MISSES]               = IST("Total number of SSL session cache misses."),
+	[INF_COMPRESS_BPS_IN]                = IST("Number of bytes per second over last elapsed second, before http compression."),
+	[INF_COMPRESS_BPS_OUT]               = IST("Number of bytes per second over last elapsed second, after http compression."),
+	[INF_COMPRESS_BPS_RATE_LIM]          = IST("Configured maximum input compression rate in bytes."),
+	[INF_ZLIB_MEM_USAGE]                 = IST("Current memory used for zlib in bytes."),
+	[INF_MAX_ZLIB_MEM_USAGE]             = IST("Configured maximum amount of memory for zlib in bytes."),
+	[INF_TASKS]                          = IST("Current number of tasks."),
+	[INF_RUN_QUEUE]                      = IST("Current number of tasks in the run-queue."),
+	[INF_IDLE_PCT]                       = IST("Idle to total ratio over last sample (percent)."),
+	[INF_NODE]                           = IST("Node name."),
+	[INF_DESCRIPTION]                    = IST("Node description."),
+	[INF_STOPPING]                       = IST("Non zero means stopping in progress."),
+	[INF_JOBS]                           = IST("Current number of active jobs (listeners, sessions, open devices)."),
+	[INF_UNSTOPPABLE_JOBS]               = IST("Current number of active jobs that can't be stopped during a soft stop."),
+	[INF_LISTENERS]                      = IST("Current number of active listeners."),
+	[INF_ACTIVE_PEERS]                   = IST("Current number of active peers."),
+	[INF_CONNECTED_PEERS]                = IST("Current number of connected peers."),
+	[INF_DROPPED_LOGS]                   = IST("Total number of dropped logs."),
+	[INF_BUSY_POLLING]                   = IST("Non zero if the busy polling is enabled."),
+};
+
+/* Description of all stats fields */
+const struct ist promex_st_metric_desc[ST_F_TOTAL_FIELDS] = {
+	[ST_F_PXNAME]         = IST("The proxy name."),
+	[ST_F_SVNAME]         = IST("The service name (FRONTEND for frontend, BACKEND for backend, any name for server/listener)."),
+	[ST_F_QCUR]           = IST("Current number of queued requests."),
+	[ST_F_QMAX]           = IST("Maximum observed number of queued requests."),
+	[ST_F_SCUR]           = IST("Current number of active sessions."),
+	[ST_F_SMAX]           = IST("Maximum observed number of active sessions."),
+	[ST_F_SLIM]           = IST("Configured session limit."),
+	[ST_F_STOT]           = IST("Total number of sessions."),
+	[ST_F_BIN]            = IST("Current total of incoming bytes."),
+	[ST_F_BOUT]           = IST("Current total of outgoing bytes."),
+	[ST_F_DREQ]           = IST("Total number of denied requests."),
+	[ST_F_DRESP]          = IST("Total number of denied responses."),
+	[ST_F_EREQ]           = IST("Total number of request errors."),
+	[ST_F_ECON]           = IST("Total number of connection errors."),
+	[ST_F_ERESP]          = IST("Total number of response errors."),
+	[ST_F_WRETR]          = IST("Total number of retry warnings."),
+	[ST_F_WREDIS]         = IST("Total number of redispatch warnings."),
+	[ST_F_STATUS]         = IST("Current status of the service (frontend: 0=STOP, 1=UP, 2=FULL - backend/server: 0=DOWN, 1=UP)."),
+	[ST_F_WEIGHT]         = IST("Service weight."),
+	[ST_F_ACT]            = IST("Current number of active servers."),
+	[ST_F_BCK]            = IST("Current number of backup servers."),
+	[ST_F_CHKFAIL]        = IST("Total number of failed check (Only counts checks failed when the server is up)."),
+	[ST_F_CHKDOWN]        = IST("Total number of UP->DOWN transitions."),
+	[ST_F_LASTCHG]        = IST("Number of seconds since the last UP<->DOWN transition."),
+	[ST_F_DOWNTIME]       = IST("Total downtime (in seconds) for the service."),
+	[ST_F_QLIMIT]         = IST("Configured maxqueue for the server (0 meaning no limit)."),
+	[ST_F_PID]            = IST("Process id (0 for first instance, 1 for second, ...)"),
+	[ST_F_IID]            = IST("Unique proxy id."),
+	[ST_F_SID]            = IST("Server id (unique inside a proxy)."),
+	[ST_F_THROTTLE]       = IST("Current throttle percentage for the server, when slowstart is active, or no value if not in slowstart."),
+	[ST_F_LBTOT]          = IST("Total number of times a service was selected, either for new sessions, or when redispatching."),
+	[ST_F_TRACKED]        = IST("Id of proxy/server if tracking is enabled."),
+	[ST_F_TYPE]           = IST("Service type (0=frontend, 1=backend, 2=server, 3=socket/listener)."),
+	[ST_F_RATE]           = IST("Current number of sessions per second over last elapsed second."),
+	[ST_F_RATE_LIM]       = IST("Configured limit on new sessions per second."),
+	[ST_F_RATE_MAX]       = IST("Maximum observed number of sessions per second."),
+	[ST_F_CHECK_STATUS]   = IST("Status of last health check (If a check is running, the status will be reported, prefixed with '* ')."),
+	[ST_F_CHECK_CODE]     = IST("layer5-7 code, if available of the last health check."),
+	[ST_F_CHECK_DURATION] = IST("Time in ms took to finish last health check."),
+	[ST_F_HRSP_1XX]       = IST("Total number of HTTP responses."),
+	[ST_F_HRSP_2XX]       = IST("Total number of HTTP responses."),
+	[ST_F_HRSP_3XX]       = IST("Total number of HTTP responses."),
+	[ST_F_HRSP_4XX]       = IST("Total number of HTTP responses."),
+	[ST_F_HRSP_5XX]       = IST("Total number of HTTP responses."),
+	[ST_F_HRSP_OTHER]     = IST("Total number of HTTP responses."),
+	[ST_F_HANAFAIL]       = IST("Total number of failed health checks."),
+	[ST_F_REQ_RATE]       = IST("Current number of HTTP requests per second over last elapsed second."),
+	[ST_F_REQ_RATE_MAX]   = IST("Maximum observed number of HTTP requests per second."),
+	[ST_F_REQ_TOT]        = IST("Total number of HTTP requests received."),
+	[ST_F_CLI_ABRT]       = IST("Total number of data transfers aborted by the client."),
+	[ST_F_SRV_ABRT]       = IST("Total number of data transfers aborted by the server."),
+	[ST_F_COMP_IN]        = IST("Total number of HTTP response bytes fed to the compressor."),
+	[ST_F_COMP_OUT]       = IST("Total number of HTTP response bytes emitted by the compressor."),
+	[ST_F_COMP_BYP]       = IST("Total number of bytes that bypassed the HTTP compressor (CPU/BW limit)."),
+	[ST_F_COMP_RSP]       = IST("Total number of HTTP responses that were compressed."),
+	[ST_F_LASTSESS]       = IST("Number of seconds since last session assigned to server/backend."),
+	[ST_F_LAST_CHK]       = IST("Last health check contents or textual error"),
+	[ST_F_LAST_AGT]       = IST("Last agent check contents or textual error"),
+	[ST_F_QTIME]          = IST("Avg. queue time for last 1024 successful connections."),
+	[ST_F_CTIME]          = IST("Avg. connect time for last 1024 successful connections."),
+	[ST_F_RTIME]          = IST("Avg. response time for last 1024 successful connections."),
+	[ST_F_TTIME]          = IST("Avg. total time for last 1024 successful connections."),
+	[ST_F_AGENT_STATUS]   = IST("Status of last agent check."),
+	[ST_F_AGENT_CODE]     = IST("Numeric code reported by agent if any (unused for now)."),
+	[ST_F_AGENT_DURATION] = IST("Time in ms taken to finish last agent check."),
+	[ST_F_CHECK_DESC]     = IST("Short human-readable description of the last health status."),
+	[ST_F_AGENT_DESC]     = IST("Short human-readable description of the last agent status."),
+	[ST_F_CHECK_RISE]     = IST("Server's \"rise\" parameter used by health checks"),
+	[ST_F_CHECK_FALL]     = IST("Server's \"fall\" parameter used by health checks"),
+	[ST_F_CHECK_HEALTH]   = IST("Server's health check value between 0 and rise+fall-1"),
+	[ST_F_AGENT_RISE]     = IST("Agent's \"rise\" parameter, normally 1."),
+	[ST_F_AGENT_FALL]     = IST("Agent's \"fall\" parameter, normally 1."),
+	[ST_F_AGENT_HEALTH]   = IST("Agent's health parameter, between 0 and rise+fall-1"),
+	[ST_F_ADDR]           = IST("address:port or \"unix\". IPv6 has brackets around the address."),
+	[ST_F_COOKIE]         = IST("Server's cookie value or backend's cookie name."),
+	[ST_F_MODE]           = IST("Proxy mode (tcp, http, health, unknown)."),
+	[ST_F_ALGO]           = IST("Load balancing algorithm."),
+	[ST_F_CONN_RATE]      = IST("Current number of connections per second over the last elapsed second."),
+	[ST_F_CONN_RATE_MAX]  = IST("Maximum observed number of connections per second."),
+	[ST_F_CONN_TOT]       = IST("Total number of connections."),
+	[ST_F_INTERCEPTED]    = IST("Total number of intercepted HTTP requests."),
+	[ST_F_DCON]           = IST("Total number of requests denied by \"tcp-request connection\" rules."),
+	[ST_F_DSES]           = IST("Total number of requests denied by \"tcp-request session\" rules."),
+	[ST_F_WREW]           = IST("Total number of failed header rewriting warnings."),
+	[ST_F_CONNECT]        = IST("Total number of connection establishment attempts."),
+	[ST_F_REUSE]          = IST("Total number of connection reuses."),
+	[ST_F_CACHE_LOOKUPS]  = IST("Total number of HTTP cache lookups."),
+	[ST_F_CACHE_HITS]     = IST("Total number of HTTP cache hits."),
+};
+
+/* Specific labels for all info fields. Empty by default. */
+const struct ist promex_inf_metric_labels[INF_TOTAL_FIELDS] = {
+	[INF_NAME]                           = IST(""),
+	[INF_VERSION]                        = IST(""),
+	[INF_RELEASE_DATE]                   = IST(""),
+	[INF_NBTHREAD]                       = IST(""),
+	[INF_NBPROC]                         = IST(""),
+	[INF_PROCESS_NUM]                    = IST(""),
+	[INF_PID]                            = IST(""),
+	[INF_UPTIME]                         = IST(""),
+	[INF_UPTIME_SEC]                     = IST(""),
+	[INF_MEMMAX_MB]                      = IST(""),
+	[INF_POOL_ALLOC_MB]                  = IST(""),
+	[INF_POOL_USED_MB]                   = IST(""),
+	[INF_POOL_FAILED]                    = IST(""),
+	[INF_ULIMIT_N]                       = IST(""),
+	[INF_MAXSOCK]                        = IST(""),
+	[INF_MAXCONN]                        = IST(""),
+	[INF_HARD_MAXCONN]                   = IST(""),
+	[INF_CURR_CONN]                      = IST(""),
+	[INF_CUM_CONN]                       = IST(""),
+	[INF_CUM_REQ]                        = IST(""),
+	[INF_MAX_SSL_CONNS]                  = IST(""),
+	[INF_CURR_SSL_CONNS]                 = IST(""),
+	[INF_CUM_SSL_CONNS]                  = IST(""),
+	[INF_MAXPIPES]                       = IST(""),
+	[INF_PIPES_USED]                     = IST(""),
+	[INF_PIPES_FREE]                     = IST(""),
+	[INF_CONN_RATE]                      = IST(""),
+	[INF_CONN_RATE_LIMIT]                = IST(""),
+	[INF_MAX_CONN_RATE]                  = IST(""),
+	[INF_SESS_RATE]                      = IST(""),
+	[INF_SESS_RATE_LIMIT]                = IST(""),
+	[INF_MAX_SESS_RATE]                  = IST(""),
+	[INF_SSL_RATE]                       = IST(""),
+	[INF_SSL_RATE_LIMIT]                 = IST(""),
+	[INF_MAX_SSL_RATE]                   = IST(""),
+	[INF_SSL_FRONTEND_KEY_RATE]          = IST(""),
+	[INF_SSL_FRONTEND_MAX_KEY_RATE]      = IST(""),
+	[INF_SSL_FRONTEND_SESSION_REUSE_PCT] = IST(""),
+	[INF_SSL_BACKEND_KEY_RATE]           = IST(""),
+	[INF_SSL_BACKEND_MAX_KEY_RATE]       = IST(""),
+	[INF_SSL_CACHE_LOOKUPS]              = IST(""),
+	[INF_SSL_CACHE_MISSES]               = IST(""),
+	[INF_COMPRESS_BPS_IN]                = IST(""),
+	[INF_COMPRESS_BPS_OUT]               = IST(""),
+	[INF_COMPRESS_BPS_RATE_LIM]          = IST(""),
+	[INF_ZLIB_MEM_USAGE]                 = IST(""),
+	[INF_MAX_ZLIB_MEM_USAGE]             = IST(""),
+	[INF_TASKS]                          = IST(""),
+	[INF_RUN_QUEUE]                      = IST(""),
+	[INF_IDLE_PCT]                       = IST(""),
+	[INF_NODE]                           = IST(""),
+	[INF_DESCRIPTION]                    = IST(""),
+	[INF_STOPPING]                       = IST(""),
+	[INF_JOBS]                           = IST(""),
+	[INF_UNSTOPPABLE_JOBS]               = IST(""),
+	[INF_LISTENERS]                      = IST(""),
+	[INF_ACTIVE_PEERS]                   = IST(""),
+	[INF_CONNECTED_PEERS]                = IST(""),
+	[INF_DROPPED_LOGS]                   = IST(""),
+	[INF_BUSY_POLLING]                   = IST(""),
+};
+
+/* Specific labels for all stats fields. Empty by default. */
+const struct ist promex_st_metric_labels[ST_F_TOTAL_FIELDS] = {
+	[ST_F_PXNAME]         = IST(""),
+	[ST_F_SVNAME]         = IST(""),
+	[ST_F_QCUR]           = IST(""),
+	[ST_F_QMAX]           = IST(""),
+	[ST_F_SCUR]           = IST(""),
+	[ST_F_SMAX]           = IST(""),
+	[ST_F_SLIM]           = IST(""),
+	[ST_F_STOT]           = IST(""),
+	[ST_F_BIN]            = IST(""),
+	[ST_F_BOUT]           = IST(""),
+	[ST_F_DREQ]           = IST(""),
+	[ST_F_DRESP]          = IST(""),
+	[ST_F_EREQ]           = IST(""),
+	[ST_F_ECON]           = IST(""),
+	[ST_F_ERESP]          = IST(""),
+	[ST_F_WRETR]          = IST(""),
+	[ST_F_WREDIS]         = IST(""),
+	[ST_F_STATUS]         = IST(""),
+	[ST_F_WEIGHT]         = IST(""),
+	[ST_F_ACT]            = IST(""),
+	[ST_F_BCK]            = IST(""),
+	[ST_F_CHKFAIL]        = IST(""),
+	[ST_F_CHKDOWN]        = IST(""),
+	[ST_F_LASTCHG]        = IST(""),
+	[ST_F_DOWNTIME]       = IST(""),
+	[ST_F_QLIMIT]         = IST(""),
+	[ST_F_PID]            = IST(""),
+	[ST_F_IID]            = IST(""),
+	[ST_F_SID]            = IST(""),
+	[ST_F_THROTTLE]       = IST(""),
+	[ST_F_LBTOT]          = IST(""),
+	[ST_F_TRACKED]        = IST(""),
+	[ST_F_TYPE]           = IST(""),
+	[ST_F_RATE]           = IST(""),
+	[ST_F_RATE_LIM]       = IST(""),
+	[ST_F_RATE_MAX]       = IST(""),
+	[ST_F_CHECK_STATUS]   = IST(""),
+	[ST_F_CHECK_CODE]     = IST(""),
+	[ST_F_CHECK_DURATION] = IST(""),
+	[ST_F_HRSP_1XX]       = IST("code=\"1xx\""),
+	[ST_F_HRSP_2XX]       = IST("code=\"2xx\""),
+	[ST_F_HRSP_3XX]       = IST("code=\"3xx\""),
+	[ST_F_HRSP_4XX]       = IST("code=\"4xx\""),
+	[ST_F_HRSP_5XX]       = IST("code=\"5xx\""),
+	[ST_F_HRSP_OTHER]     = IST("code=\"other\""),
+	[ST_F_HANAFAIL]       = IST(""),
+	[ST_F_REQ_RATE]       = IST(""),
+	[ST_F_REQ_RATE_MAX]   = IST(""),
+	[ST_F_REQ_TOT]        = IST(""),
+	[ST_F_CLI_ABRT]       = IST(""),
+	[ST_F_SRV_ABRT]       = IST(""),
+	[ST_F_COMP_IN]        = IST(""),
+	[ST_F_COMP_OUT]       = IST(""),
+	[ST_F_COMP_BYP]       = IST(""),
+	[ST_F_COMP_RSP]       = IST(""),
+	[ST_F_LASTSESS]       = IST(""),
+	[ST_F_LAST_CHK]       = IST(""),
+	[ST_F_LAST_AGT]       = IST(""),
+	[ST_F_QTIME]          = IST(""),
+	[ST_F_CTIME]          = IST(""),
+	[ST_F_RTIME]          = IST(""),
+	[ST_F_TTIME]          = IST(""),
+	[ST_F_AGENT_STATUS]   = IST(""),
+	[ST_F_AGENT_CODE]     = IST(""),
+	[ST_F_AGENT_DURATION] = IST(""),
+	[ST_F_CHECK_DESC]     = IST(""),
+	[ST_F_AGENT_DESC]     = IST(""),
+	[ST_F_CHECK_RISE]     = IST(""),
+	[ST_F_CHECK_FALL]     = IST(""),
+	[ST_F_CHECK_HEALTH]   = IST(""),
+	[ST_F_AGENT_RISE]     = IST(""),
+	[ST_F_AGENT_FALL]     = IST(""),
+	[ST_F_AGENT_HEALTH]   = IST(""),
+	[ST_F_ADDR]           = IST(""),
+	[ST_F_COOKIE]         = IST(""),
+	[ST_F_MODE]           = IST(""),
+	[ST_F_ALGO]           = IST(""),
+	[ST_F_CONN_RATE]      = IST(""),
+	[ST_F_CONN_RATE_MAX]  = IST(""),
+	[ST_F_CONN_TOT]       = IST(""),
+	[ST_F_INTERCEPTED]    = IST(""),
+	[ST_F_DCON]           = IST(""),
+	[ST_F_DSES]           = IST(""),
+	[ST_F_WREW]           = IST(""),
+	[ST_F_CONNECT]        = IST(""),
+	[ST_F_REUSE]          = IST(""),
+	[ST_F_CACHE_LOOKUPS]  = IST(""),
+	[ST_F_CACHE_HITS]     = IST(""),
+};
+
+/* Type for all info fields. "untyped" is used for unsupported field. */
+const struct ist promex_inf_metric_types[INF_TOTAL_FIELDS] = {
+	[INF_NAME]                           = IST("untyped"),
+	[INF_VERSION]                        = IST("untyped"),
+	[INF_RELEASE_DATE]                   = IST("untyped"),
+	[INF_NBTHREAD]                       = IST("counter"),
+	[INF_NBPROC]                         = IST("counter"),
+	[INF_PROCESS_NUM]                    = IST("counter"),
+	[INF_PID]                            = IST("untyped"),
+	[INF_UPTIME]                         = IST("untyped"),
+	[INF_UPTIME_SEC]                     = IST("counter"),
+	[INF_MEMMAX_MB]                      = IST("counter"),
+	[INF_POOL_ALLOC_MB]                  = IST("gauge"),
+	[INF_POOL_USED_MB]                   = IST("gauge"),
+	[INF_POOL_FAILED]                    = IST("counter"),
+	[INF_ULIMIT_N]                       = IST("counter"),
+	[INF_MAXSOCK]                        = IST("gauge"),
+	[INF_MAXCONN]                        = IST("gauge"),
+	[INF_HARD_MAXCONN]                   = IST("gauge"),
+	[INF_CURR_CONN]                      = IST("gauge"),
+	[INF_CUM_CONN]                       = IST("counter"),
+	[INF_CUM_REQ]                        = IST("counter"),
+	[INF_MAX_SSL_CONNS]                  = IST("counter"),
+	[INF_CURR_SSL_CONNS]                 = IST("gauge"),
+	[INF_CUM_SSL_CONNS]                  = IST("counter"),
+	[INF_MAXPIPES]                       = IST("counter"),
+	[INF_PIPES_USED]                     = IST("gauge"),
+	[INF_PIPES_FREE]                     = IST("gauge"),
+	[INF_CONN_RATE]                      = IST("gauge"),
+	[INF_CONN_RATE_LIMIT]                = IST("counter"),
+	[INF_MAX_CONN_RATE]                  = IST("counter"),
+	[INF_SESS_RATE]                      = IST("gauge"),
+	[INF_SESS_RATE_LIMIT]                = IST("counter"),
+	[INF_MAX_SESS_RATE]                  = IST("counter"),
+	[INF_SSL_RATE]                       = IST("gauge"),
+	[INF_SSL_RATE_LIMIT]                 = IST("counter"),
+	[INF_MAX_SSL_RATE]                   = IST("counter"),
+	[INF_SSL_FRONTEND_KEY_RATE]          = IST("gauge"),
+	[INF_SSL_FRONTEND_MAX_KEY_RATE]      = IST("counter"),
+	[INF_SSL_FRONTEND_SESSION_REUSE_PCT] = IST("gauge"),
+	[INF_SSL_BACKEND_KEY_RATE]           = IST("gauge"),
+	[INF_SSL_BACKEND_MAX_KEY_RATE]       = IST("counter"),
+	[INF_SSL_CACHE_LOOKUPS]              = IST("counter"),
+	[INF_SSL_CACHE_MISSES]               = IST("counter"),
+	[INF_COMPRESS_BPS_IN]                = IST("gauge"),
+	[INF_COMPRESS_BPS_OUT]               = IST("gauge"),
+	[INF_COMPRESS_BPS_RATE_LIM]          = IST("counter"),
+	[INF_ZLIB_MEM_USAGE]                 = IST("gauge"),
+	[INF_MAX_ZLIB_MEM_USAGE]             = IST("counter"),
+	[INF_TASKS]                          = IST("gauge"),
+	[INF_RUN_QUEUE]                      = IST("gouge"),
+	[INF_IDLE_PCT]                       = IST("gauge"),
+	[INF_NODE]                           = IST("untyped"),
+	[INF_DESCRIPTION]                    = IST("untyped"),
+	[INF_STOPPING]                       = IST("gauge"),
+	[INF_JOBS]                           = IST("gauge"),
+	[INF_UNSTOPPABLE_JOBS]               = IST("gauge"),
+	[INF_LISTENERS]                      = IST("gauge"),
+	[INF_ACTIVE_PEERS]                   = IST("gauge"),
+	[INF_CONNECTED_PEERS]                = IST("gauge"),
+	[INF_DROPPED_LOGS]                   = IST("counter"),
+	[INF_BUSY_POLLING]                   = IST("counter"),
+};
+
+/* Type for all stats fields. "untyped" is used for unsupported field. */
+const struct ist promex_st_metric_types[ST_F_TOTAL_FIELDS] = {
+	[ST_F_PXNAME]         = IST("untyped"),
+	[ST_F_SVNAME]         = IST("untyped"),
+	[ST_F_QCUR]           = IST("gauge"),
+	[ST_F_QMAX]           = IST("counter"),
+	[ST_F_SCUR]           = IST("gauge"),
+	[ST_F_SMAX]           = IST("counter"),
+	[ST_F_SLIM]           = IST("gauge"),
+	[ST_F_STOT]           = IST("counter"),
+	[ST_F_BIN]            = IST("counter"),
+	[ST_F_BOUT]           = IST("counter"),
+	[ST_F_DREQ]           = IST("counter"),
+	[ST_F_DRESP]          = IST("counter"),
+	[ST_F_EREQ]           = IST("counter"),
+	[ST_F_ECON]           = IST("counter"),
+	[ST_F_ERESP]          = IST("counter"),
+	[ST_F_WRETR]          = IST("counter"),
+	[ST_F_WREDIS]         = IST("counter"),
+	[ST_F_STATUS]         = IST("gauge"),
+	[ST_F_WEIGHT]         = IST("gauge"),
+	[ST_F_ACT]            = IST("gauge"),
+	[ST_F_BCK]            = IST("gauge"),
+	[ST_F_CHKFAIL]        = IST("counter"),
+	[ST_F_CHKDOWN]        = IST("counter"),
+	[ST_F_LASTCHG]        = IST("gauge"),
+	[ST_F_DOWNTIME]       = IST("counter"),
+	[ST_F_QLIMIT]         = IST("gauge"),
+	[ST_F_PID]            = IST("untyped"),
+	[ST_F_IID]            = IST("untyped"),
+	[ST_F_SID]            = IST("untyped"),
+	[ST_F_THROTTLE]       = IST("gauge"),
+	[ST_F_LBTOT]          = IST("counter"),
+	[ST_F_TRACKED]        = IST("untyped"),
+	[ST_F_TYPE]           = IST("untyped"),
+	[ST_F_RATE]           = IST("gauge"),
+	[ST_F_RATE_LIM]       = IST("gauge"),
+	[ST_F_RATE_MAX]       = IST("counter"),
+	[ST_F_CHECK_STATUS]   = IST("untyped"),
+	[ST_F_CHECK_CODE]     = IST("untyped"),
+	[ST_F_CHECK_DURATION] = IST("gauge"),
+	[ST_F_HRSP_1XX]       = IST("counter"),
+	[ST_F_HRSP_2XX]       = IST("counter"),
+	[ST_F_HRSP_3XX]       = IST("counter"),
+	[ST_F_HRSP_4XX]       = IST("counter"),
+	[ST_F_HRSP_5XX]       = IST("counter"),
+	[ST_F_HRSP_OTHER]     = IST("counter"),
+	[ST_F_HANAFAIL]       = IST("counter"),
+	[ST_F_REQ_RATE]       = IST("gauge"),
+	[ST_F_REQ_RATE_MAX]   = IST("counter"),
+	[ST_F_REQ_TOT]        = IST("counter"),
+	[ST_F_CLI_ABRT]       = IST("counter"),
+	[ST_F_SRV_ABRT]       = IST("counter"),
+	[ST_F_COMP_IN]        = IST("counter"),
+	[ST_F_COMP_OUT]       = IST("counter"),
+	[ST_F_COMP_BYP]       = IST("counter"),
+	[ST_F_COMP_RSP]       = IST("counter"),
+	[ST_F_LASTSESS]       = IST("gauge"),
+	[ST_F_LAST_CHK]       = IST("untyped"),
+	[ST_F_LAST_AGT]       = IST("untyped"),
+	[ST_F_QTIME]          = IST("gauge"),
+	[ST_F_CTIME]          = IST("gauge"),
+	[ST_F_RTIME]          = IST("gauge"),
+	[ST_F_TTIME]          = IST("gauge"),
+	[ST_F_AGENT_STATUS]   = IST("untyped"),
+	[ST_F_AGENT_CODE]     = IST("untyped"),
+	[ST_F_AGENT_DURATION] = IST("gauge"),
+	[ST_F_CHECK_DESC]     = IST("untyped"),
+	[ST_F_AGENT_DESC]     = IST("untyped"),
+	[ST_F_CHECK_RISE]     = IST("gauge"),
+	[ST_F_CHECK_FALL]     = IST("gauge"),
+	[ST_F_CHECK_HEALTH]   = IST("gauge"),
+	[ST_F_AGENT_RISE]     = IST("gauge"),
+	[ST_F_AGENT_FALL]     = IST("gauge"),
+	[ST_F_AGENT_HEALTH]   = IST("gauge"),
+	[ST_F_ADDR]           = IST("untyped"),
+	[ST_F_COOKIE]         = IST("untyped"),
+	[ST_F_MODE]           = IST("untyped"),
+	[ST_F_ALGO]           = IST("untyped"),
+	[ST_F_CONN_RATE]      = IST("gauge"),
+	[ST_F_CONN_RATE_MAX]  = IST("counter"),
+	[ST_F_CONN_TOT]       = IST("counter"),
+	[ST_F_INTERCEPTED]    = IST("counter"),
+	[ST_F_DCON]           = IST("counter"),
+	[ST_F_DSES]           = IST("counter"),
+	[ST_F_WREW]           = IST("counter"),
+	[ST_F_CONNECT]        = IST("counter"),
+	[ST_F_REUSE]          = IST("counter"),
+	[ST_F_CACHE_LOOKUPS]  = IST("counter"),
+	[ST_F_CACHE_HITS]     = IST("counter"),
+};
+
+/* Return the server status: 1=UP and 0=DOWN. */
+static int promex_srv_status(struct server *sv)
+{
+	struct server *via, *ref;
+	int state = 0;
+
+	/* we have "via" which is the tracked server as described in the configuration,
+	 * and "ref" which is the checked server and the end of the chain.
+	 */
+	via = sv->track ? sv->track : sv;
+	ref = via;
+	while (ref->track)
+		ref = ref->track;
+
+	if (sv->cur_state == SRV_ST_RUNNING || sv->cur_state == SRV_ST_STARTING) {
+		state = 1;
+		if (sv->cur_admin & SRV_ADMF_DRAIN)
+			state = 0;
+	}
+
+	return state;
+}
+
+/* Convert a field to its string representation and write it in <out>, followed
+ * by a newline, if there is enough space. non-numeric value are converted in
+ * "Nan" because Prometheus only support numerical values (but it is unexepceted
+ * to process this kind of value). It returns 1 on success. Otherwise, it
+ * returns 0. The buffer's length must not exceed <max> value.
+ */
+static int promex_metric_to_str(struct buffer *out, struct field *f, size_t max)
+{
+	int ret = 0;
+
+	switch (field_format(f, 0)) {
+		case FF_EMPTY: ret = chunk_strcat(out,  "Nan\n"); break;
+		case FF_S32:   ret = chunk_appendf(out, "%d\n", f->u.s32); break;
+		case FF_U32:   ret = chunk_appendf(out, "%u\n", f->u.u32); break;
+		case FF_S64:   ret = chunk_appendf(out, "%lld\n", (long long)f->u.s64); break;
+		case FF_U64:   ret = chunk_appendf(out, "%llu\n", (unsigned long long)f->u.u64); break;
+		case FF_STR:   ret = chunk_strcat(out,  "Nan\n"); break;
+		default:       ret = chunk_strcat(out,  "Nan\n"); break;
+	}
+	if (!ret || out->data > max)
+		return 0;
+	return 1;
+}
+
+/* Concatenate the <prefix> with the field name using the array
+ * <promex_st_metric_names> and store it in <name>. The field type is in
+ * <appctx->st2>. This function never fails but relies on
+ * <PROMEX_MAX_NAME_LEN>. So by sure the result is small enougth to be copied in
+ * <name>
+ */
+static void promex_metric_name(struct appctx *appctx, struct ist *name, const struct ist prefix)
+{
+	const struct ist *names;
+
+	names = ((appctx->ctx.stats.flags & PROMEX_FL_INFO_METRIC)
+		 ? promex_inf_metric_names
+		 : promex_st_metric_names);
+
+	istcat(name, prefix, PROMEX_MAX_NAME_LEN);
+	istcat(name, names[appctx->st2],  PROMEX_MAX_NAME_LEN);
+}
+
+/* Dump the header lines for <metric>. It is its #HELP and #TYPE strings. It
+ * returns 1 on success. Otherwise, if <out> length exceeds <max>, it returns 0.
+ */
+static int promex_dump_metric_header(struct appctx *appctx, struct htx *htx,
+				     const struct ist name, struct ist *out, size_t max)
+{
+	const struct ist *desc, *types;
+
+	if (appctx->ctx.stats.flags & PROMEX_FL_INFO_METRIC) {
+		desc  = promex_inf_metric_desc;
+		types = promex_inf_metric_types;
+	}
+	else {
+		desc  = promex_st_metric_desc;
+		types = promex_st_metric_types;
+	}
+
+	if (istcat(out, ist("#HELP "), max) == -1 ||
+	    istcat(out, name, max) == -1 ||
+	    istcat(out, ist(" "), max) == -1 ||
+	    istcat(out, desc[appctx->st2], max) == -1 ||
+	    istcat(out, ist("\n#TYPE "), max) == -1 ||
+	    istcat(out, name, max) == -1 ||
+	    istcat(out, ist(" "), max) == -1 ||
+	    istcat(out, types[appctx->st2], max) == -1 ||
+	    istcat(out, ist("\n"), max) == -1)
+		goto full;
+
+	return 1;
+
+  full:
+	return 0;
+}
+
+/* Dump the line for <metric>. It starts by the metric name followed by its
+ * labels (proxy name, server name...) between braces and finally its value. If
+ * not already done, the header lines are dumped first. It returns 1 on
+ * success. Otherwise if <out> length exceeds <max>, it returns 0.
+ */
+static int promex_dump_metric(struct appctx *appctx, struct htx *htx,
+			      const struct ist prefix, struct field *metric,
+			      struct ist *out, size_t max)
+{
+	struct ist name = { .ptr = (char[PROMEX_MAX_NAME_LEN]){ 0 }, .len = 0 };
+	size_t len = out->len;
+
+	if (out->len + PROMEX_MAX_METRIC_LENGTH > max)
+		return 0;
+
+	promex_metric_name(appctx, &name, prefix);
+	if ((appctx->ctx.stats.flags & PROMEX_FL_METRIC_HDR) &&
+	    !promex_dump_metric_header(appctx, htx, name, out, max))
+		goto full;
+
+	if (appctx->ctx.stats.flags & PROMEX_FL_INFO_METRIC) {
+		const struct ist label = promex_inf_metric_labels[appctx->st2];
+
+		if (istcat(out, name, max) == -1 ||
+		    (label.len && istcat(out, ist("{"), max) == -1) ||
+		    (label.len && istcat(out, label, max) == -1) ||
+		    (label.len && istcat(out, ist("}"), max) == -1) ||
+		    istcat(out, ist(" "), max) == -1)
+			goto full;
+	}
+	else {
+		struct proxy *px = appctx->ctx.stats.px;
+		struct server *srv = appctx->ctx.stats.sv;
+		const struct ist label = promex_st_metric_labels[appctx->st2];
+
+		if (istcat(out, name, max) == -1 ||
+		    istcat(out, ist("{proxy=\""), max) == -1 ||
+		    istcat(out, ist2(px->id, strlen(px->id)), max) == -1 ||
+		    istcat(out, ist("\""), max) == -1 ||
+		    (srv && istcat(out, ist(",server=\""), max) == -1) ||
+		    (srv && istcat(out, ist2(srv->id, strlen(srv->id)), max) == -1) ||
+		    (srv && istcat(out, ist("\""), max) == -1) ||
+		    (label.len && istcat(out, ist(","), max) == -1) ||
+		    (label.len && istcat(out, label, max) == -1) ||
+		    istcat(out, ist("} "), max) == -1)
+			goto full;
+	}
+
+	trash.data = out->len;
+	if (!promex_metric_to_str(&trash, metric, max))
+		goto full;
+	out->len = trash.data;
+
+	appctx->ctx.stats.flags &= ~PROMEX_FL_METRIC_HDR;
+	return 1;
+  full:
+	// Restore previous length
+	out->len = len;
+	return 0;
+
+}
+
+
+/* Dump global metrics (prefixed by "haproxy_process_"). It returns 1 on sucess,
+ * 0 if <htx> is full and -1 in case of any error. */
+static int promex_dump_global_metrics(struct appctx *appctx, struct htx *htx)
+{
+	static struct ist prefix = IST("haproxy_process_");
+	struct field metric;
+	struct channel *chn = si_ic(appctx->owner);
+	struct ist out = ist2(trash.area, 0);
+	size_t max = channel_htx_recv_max(chn, htx);
+	int ret = 1;
+
+#ifdef USE_OPENSSL
+	int ssl_sess_rate = read_freq_ctr(&global.ssl_per_sec);
+	int ssl_key_rate = read_freq_ctr(&global.ssl_fe_keys_per_sec);
+	int ssl_reuse = 0;
+
+	if (ssl_key_rate < ssl_sess_rate) {
+		/* count the ssl reuse ratio and avoid overflows in both directions */
+		ssl_reuse = 100 - (100 * ssl_key_rate + (ssl_sess_rate - 1) / 2) / ssl_sess_rate;
+	}
+#endif
+
+	while (appctx->st2 && appctx->st2 < INF_TOTAL_FIELDS) {
+		switch (appctx->st2) {
+			case INF_NBTHREAD:
+				metric = mkf_u32(FO_CONFIG|FS_SERVICE, global.nbthread);
+				break;
+			case INF_NBPROC:
+				metric = mkf_u32(FO_CONFIG|FS_SERVICE, global.nbproc);
+				break;
+			case INF_PROCESS_NUM:
+				metric = mkf_u32(FO_KEY, relative_pid);
+				break;
+			case INF_UPTIME_SEC:
+				metric = mkf_u32(FN_DURATION, (now.tv_sec - start_date.tv_sec));
+				break;
+			case INF_MEMMAX_MB:
+				metric = mkf_u32(FO_CONFIG|FN_LIMIT, global.rlimit_memmax);
+				break;
+			case INF_POOL_ALLOC_MB:
+				metric = mkf_u32(0, (unsigned)(pool_total_allocated() / 1048576L));
+				break;
+			case INF_POOL_USED_MB:
+				metric = mkf_u32(0, (unsigned)(pool_total_used() / 1048576L));
+				break;
+			case INF_POOL_FAILED:
+				metric = mkf_u32(FN_COUNTER, pool_total_failures());
+				break;
+			case INF_ULIMIT_N:
+				metric = mkf_u32(FO_CONFIG|FN_LIMIT, global.rlimit_nofile);
+				break;
+			case INF_MAXSOCK:
+				metric = mkf_u32(FO_CONFIG|FN_LIMIT, global.maxsock);
+				break;
+			case INF_MAXCONN:
+				metric = mkf_u32(FO_CONFIG|FN_LIMIT, global.maxconn);
+				break;
+			case INF_HARD_MAXCONN:
+				metric = mkf_u32(FO_CONFIG|FN_LIMIT, global.hardmaxconn);
+				break;
+			case INF_CURR_CONN:
+				metric = mkf_u32(0, actconn);
+				break;
+			case INF_CUM_CONN:
+				metric = mkf_u32(FN_COUNTER, totalconn);
+				break;
+			case INF_CUM_REQ:
+				metric = mkf_u32(FN_COUNTER, global.req_count);
+				break;
+#ifdef USE_OPENSSL
+			case INF_MAX_SSL_CONNS:
+				metric = mkf_u32(FN_MAX, global.maxsslconn);
+				break;
+			case INF_CURR_SSL_CONNS:
+				metric = mkf_u32(0, sslconns);
+				break;
+			case INF_CUM_SSL_CONNS:
+				metric = mkf_u32(FN_COUNTER, totalsslconns);
+				break;
+#endif
+			case INF_MAXPIPES:
+				metric = mkf_u32(FO_CONFIG|FN_LIMIT, global.maxpipes);
+				break;
+			case INF_PIPES_USED:
+				metric = mkf_u32(0, pipes_used);
+				break;
+			case INF_PIPES_FREE:
+				metric = mkf_u32(0, pipes_free);
+				break;
+			case INF_CONN_RATE:
+				metric = mkf_u32(FN_RATE, read_freq_ctr(&global.conn_per_sec));
+				break;
+			case INF_CONN_RATE_LIMIT:
+				metric = mkf_u32(FO_CONFIG|FN_LIMIT, global.cps_lim);
+				break;
+			case INF_MAX_CONN_RATE:
+				metric = mkf_u32(FN_MAX, global.cps_max);
+				break;
+			case INF_SESS_RATE:
+				metric = mkf_u32(FN_RATE, read_freq_ctr(&global.sess_per_sec));
+				break;
+			case INF_SESS_RATE_LIMIT:
+				metric = mkf_u32(FO_CONFIG|FN_LIMIT, global.sps_lim);
+				break;
+			case INF_MAX_SESS_RATE:
+				metric = mkf_u32(FN_RATE, global.sps_max);
+				break;
+#ifdef USE_OPENSSL
+			case INF_SSL_RATE:
+				metric = mkf_u32(FN_RATE, ssl_sess_rate);
+				break;
+			case INF_SSL_RATE_LIMIT:
+				metric = mkf_u32(FO_CONFIG|FN_LIMIT, global.ssl_lim);
+				break;
+			case INF_MAX_SSL_RATE:
+				metric = mkf_u32(FN_MAX, global.ssl_max);
+				break;
+			case INF_SSL_FRONTEND_KEY_RATE:
+				metric = mkf_u32(0, ssl_key_rate);
+				break;
+			case INF_SSL_FRONTEND_MAX_KEY_RATE:
+				metric = mkf_u32(FN_MAX, global.ssl_fe_keys_max);
+				break;
+			case INF_SSL_FRONTEND_SESSION_REUSE_PCT:
+				metric = mkf_u32(0, ssl_reuse);
+				break;
+			case INF_SSL_BACKEND_KEY_RATE:
+				metric = mkf_u32(FN_RATE, read_freq_ctr(&global.ssl_be_keys_per_sec));
+				break;
+			case INF_SSL_BACKEND_MAX_KEY_RATE:
+				metric = mkf_u32(FN_MAX, global.ssl_be_keys_max);
+				break;
+			case INF_SSL_CACHE_LOOKUPS:
+				metric = mkf_u32(FN_COUNTER, global.shctx_lookups);
+				break;
+			case INF_SSL_CACHE_MISSES:
+				metric = mkf_u32(FN_COUNTER, global.shctx_misses);
+				break;
+#endif
+			case INF_COMPRESS_BPS_IN:
+				metric = mkf_u32(FN_RATE, read_freq_ctr(&global.comp_bps_in));
+				break;
+			case INF_COMPRESS_BPS_OUT:
+				metric = mkf_u32(FN_RATE, read_freq_ctr(&global.comp_bps_out));
+				break;
+			case INF_COMPRESS_BPS_RATE_LIM:
+				metric = mkf_u32(FO_CONFIG|FN_LIMIT, global.comp_rate_lim);
+				break;
+#ifdef USE_ZLIB
+			case INF_ZLIB_MEM_USAGE:
+				metric = mkf_u32(0, zlib_used_memory);
+				break;
+			case INF_MAX_ZLIB_MEM_USAGE:
+				metric = mkf_u32(FO_CONFIG|FN_LIMIT, global.maxzlibmem);
+				break;
+#endif
+			case INF_TASKS:
+				metric = mkf_u32(0, nb_tasks_cur);
+				break;
+			case INF_RUN_QUEUE:
+				metric = mkf_u32(0, tasks_run_queue_cur);
+				break;
+			case INF_IDLE_PCT:
+				metric = mkf_u32(FN_AVG, idle_pct);
+				break;
+			case INF_STOPPING:
+				metric = mkf_u32(0, stopping);
+				break;
+			case INF_JOBS:
+				metric = mkf_u32(0, jobs);
+				break;
+			case INF_UNSTOPPABLE_JOBS:
+				metric = mkf_u32(0, unstoppable_jobs);
+				break;
+			case INF_LISTENERS:
+				metric = mkf_u32(0, listeners);
+				break;
+			case INF_ACTIVE_PEERS:
+				metric = mkf_u32(0, active_peers);
+				break;
+			case INF_CONNECTED_PEERS:
+				metric = mkf_u32(0, connected_peers);
+				break;
+			case INF_DROPPED_LOGS:
+				metric = mkf_u32(0, dropped_logs);
+				break;
+			case INF_BUSY_POLLING:
+				metric = mkf_u32(0, !!(global.tune.options & GTUNE_BUSY_POLLING));
+				break;
+
+			default:
+				goto next_metric;
+		}
+
+		if (!promex_dump_metric(appctx, htx, prefix, &metric, &out, max))
+			goto full;
+
+	   next_metric:
+		appctx->ctx.stats.flags |= PROMEX_FL_METRIC_HDR;
+		appctx->st2 = promex_global_metrics[appctx->st2];
+	}
+
+  end:
+	if (!htx_add_data(htx, out))
+		return -1; /* Unexpected and unrecoverable error */
+	channel_add_input(chn, out.len);
+	return ret;
+  full:
+	ret = 0;
+	goto end;
+}
+
+/* Dump frontends metrics (prefixed by "haproxy_frontend_"). It returns 1 on sucess,
+ * 0 if <htx> is full and -1 in case of any error. */
+static int promex_dump_front_metrics(struct appctx *appctx, struct htx *htx)
+{
+	static struct ist prefix = IST("haproxy_frontend_");
+	struct proxy *px;
+	struct field metric;
+	struct channel *chn = si_ic(appctx->owner);
+	struct ist out = ist2(trash.area, 0);
+	size_t max = channel_htx_recv_max(chn, htx);
+	int ret = 1;
+
+	while (appctx->st2 && appctx->st2 < ST_F_TOTAL_FIELDS) {
+		while (appctx->ctx.stats.px) {
+			px = appctx->ctx.stats.px;
+
+			/* skip the disabled proxies, global frontend and non-networked ones */
+			if (px->state == PR_STSTOPPED || px->uuid <= 0 || !(px->cap & PR_CAP_FE))
+				goto next_px;
+
+			switch (appctx->st2) {
+				case ST_F_STATUS:
+					metric = mkf_u32(FO_STATUS, px->state == PR_STREADY ? 1 : px->state == PR_STFULL ? 2 : 0);
+					break;
+				case ST_F_SCUR:
+					metric = mkf_u32(0, px->feconn);
+					break;
+				case ST_F_SMAX:
+					metric = mkf_u32(FN_MAX, px->fe_counters.conn_max);
+					break;
+				case ST_F_SLIM:
+					metric = mkf_u32(FO_CONFIG|FN_LIMIT, px->maxconn);
+					break;
+				case ST_F_STOT:
+					metric = mkf_u64(FN_COUNTER, px->fe_counters.cum_sess);
+					break;
+				case ST_F_RATE:
+					metric = mkf_u32(FN_RATE, read_freq_ctr(&px->fe_sess_per_sec));
+					break;
+				case ST_F_RATE_LIM:
+					metric = mkf_u32(FO_CONFIG|FN_LIMIT, px->fe_sps_lim);
+					break;
+				case ST_F_RATE_MAX:
+					metric = mkf_u32(FN_MAX, px->fe_counters.sps_max);
+					break;
+				case ST_F_CONN_RATE:
+					metric = mkf_u32(FN_RATE, read_freq_ctr(&px->fe_conn_per_sec));
+					break;
+				case ST_F_CONN_RATE_MAX:
+					metric = mkf_u32(FN_MAX, px->fe_counters.cps_max);
+					break;
+				case ST_F_CONN_TOT:
+					metric = mkf_u64(FN_COUNTER, px->fe_counters.cum_conn);
+					break;
+				case ST_F_BIN:
+					metric = mkf_u64(FN_COUNTER, px->fe_counters.bytes_in);
+					break;
+				case ST_F_BOUT:
+					metric = mkf_u64(FN_COUNTER, px->fe_counters.bytes_out);
+					break;
+				case ST_F_DREQ:
+					metric = mkf_u64(FN_COUNTER, px->fe_counters.denied_req);
+					break;
+				case ST_F_DRESP:
+					metric = mkf_u64(FN_COUNTER, px->fe_counters.denied_resp);
+					break;
+				case ST_F_EREQ:
+					metric = mkf_u64(FN_COUNTER, px->fe_counters.failed_req);
+					break;
+				case ST_F_DCON:
+					metric = mkf_u64(FN_COUNTER, px->fe_counters.denied_conn);
+					break;
+				case ST_F_DSES:
+					metric = mkf_u64(FN_COUNTER, px->fe_counters.denied_sess);
+					break;
+				case ST_F_WREW:
+					metric = mkf_u64(FN_COUNTER, px->fe_counters.failed_rewrites);
+					break;
+				case ST_F_REQ_RATE:
+					if (px->mode != PR_MODE_HTTP)
+						goto next_px;
+					metric = mkf_u32(FN_RATE, read_freq_ctr(&px->fe_req_per_sec));
+					break;
+				case ST_F_REQ_RATE_MAX:
+					if (px->mode != PR_MODE_HTTP)
+						goto next_px;
+					metric = mkf_u32(FN_MAX, px->fe_counters.p.http.rps_max);
+					break;
+				case ST_F_REQ_TOT:
+					if (px->mode != PR_MODE_HTTP)
+						goto next_px;
+					metric = mkf_u64(FN_COUNTER, px->fe_counters.p.http.cum_req);
+					break;
+				case ST_F_HRSP_1XX:
+					if (px->mode != PR_MODE_HTTP)
+						goto next_px;
+					metric = mkf_u64(FN_COUNTER, px->fe_counters.p.http.rsp[1]);
+					break;
+				case ST_F_HRSP_2XX:
+					if (px->mode != PR_MODE_HTTP)
+						goto next_px;
+					appctx->ctx.stats.flags &= ~PROMEX_FL_METRIC_HDR;
+					metric = mkf_u64(FN_COUNTER, px->fe_counters.p.http.rsp[2]);
+					break;
+				case ST_F_HRSP_3XX:
+					if (px->mode != PR_MODE_HTTP)
+						goto next_px;
+					appctx->ctx.stats.flags &= ~PROMEX_FL_METRIC_HDR;
+					metric = mkf_u64(FN_COUNTER, px->fe_counters.p.http.rsp[3]);
+					break;
+				case ST_F_HRSP_4XX:
+					if (px->mode != PR_MODE_HTTP)
+						goto next_px;
+					appctx->ctx.stats.flags &= ~PROMEX_FL_METRIC_HDR;
+					metric = mkf_u64(FN_COUNTER, px->fe_counters.p.http.rsp[4]);
+					break;
+				case ST_F_HRSP_5XX:
+					if (px->mode != PR_MODE_HTTP)
+						goto next_px;
+					appctx->ctx.stats.flags &= ~PROMEX_FL_METRIC_HDR;
+					metric = mkf_u64(FN_COUNTER, px->fe_counters.p.http.rsp[5]);
+					break;
+				case ST_F_HRSP_OTHER:
+					if (px->mode != PR_MODE_HTTP)
+						goto next_px;
+					appctx->ctx.stats.flags &= ~PROMEX_FL_METRIC_HDR;
+					metric = mkf_u64(FN_COUNTER, px->fe_counters.p.http.rsp[0]);
+					break;
+				case ST_F_INTERCEPTED:
+					if (px->mode != PR_MODE_HTTP)
+						goto next_px;
+					metric = mkf_u64(FN_COUNTER, px->fe_counters.intercepted_req);
+					break;
+				case ST_F_CACHE_LOOKUPS:
+					if (px->mode != PR_MODE_HTTP)
+						goto next_px;
+					metric = mkf_u64(FN_COUNTER, px->fe_counters.p.http.cache_lookups);
+					break;
+				case ST_F_CACHE_HITS:
+					if (px->mode != PR_MODE_HTTP)
+						goto next_px;
+					metric = mkf_u64(FN_COUNTER, px->fe_counters.p.http.cache_hits);
+					break;
+				case ST_F_COMP_IN:
+					if (px->mode != PR_MODE_HTTP)
+						goto next_px;
+					metric = mkf_u64(FN_COUNTER, px->fe_counters.comp_in);
+					break;
+				case ST_F_COMP_OUT:
+					if (px->mode != PR_MODE_HTTP)
+						goto next_px;
+					metric = mkf_u64(FN_COUNTER, px->fe_counters.comp_out);
+					break;
+				case ST_F_COMP_BYP:
+					if (px->mode != PR_MODE_HTTP)
+						goto next_px;
+					metric = mkf_u64(FN_COUNTER, px->fe_counters.comp_byp);
+					break;
+				case ST_F_COMP_RSP:
+					if (px->mode != PR_MODE_HTTP)
+						goto next_px;
+					metric = mkf_u64(FN_COUNTER, px->fe_counters.p.http.comp_rsp);
+					break;
+
+				default:
+					goto next_metric;
+			}
+
+			if (!promex_dump_metric(appctx, htx, prefix, &metric, &out, max))
+				goto full;
+		  next_px:
+			appctx->ctx.stats.px = px->next;
+		}
+	  next_metric:
+		appctx->ctx.stats.flags |= PROMEX_FL_METRIC_HDR;
+		appctx->ctx.stats.px = proxies_list;
+		appctx->st2 = promex_front_metrics[appctx->st2];
+	}
+
+  end:
+	if (!htx_add_data(htx, out))
+		return -1; /* Unexpected and unrecoverable error */
+	channel_add_input(chn, out.len);
+	return ret;
+  full:
+	ret = 0;
+	goto end;
+}
+
+/* Dump backends metrics (prefixed by "haproxy_backend_"). It returns 1 on sucess,
+ * 0 if <htx> is full and -1 in case of any error. */
+static int promex_dump_back_metrics(struct appctx *appctx, struct htx *htx)
+{
+	static struct ist prefix = IST("haproxy_backend_");
+	struct proxy *px;
+	struct field metric;
+	struct channel *chn = si_ic(appctx->owner);
+	struct ist out = ist2(trash.area, 0);
+	size_t max = channel_htx_recv_max(chn, htx);
+	int ret = 1;
+	uint32_t weight;
+
+	while (appctx->st2 && appctx->st2 < ST_F_TOTAL_FIELDS) {
+		while (appctx->ctx.stats.px) {
+			px = appctx->ctx.stats.px;
+
+			/* skip the disabled proxies, global frontend and non-networked ones */
+			if (px->state == PR_STSTOPPED || px->uuid <= 0 || !(px->cap & PR_CAP_BE))
+				goto next_px;
+
+			switch (appctx->st2) {
+				case ST_F_STATUS:
+					metric = mkf_u32(FO_STATUS, (px->lbprm.tot_weight > 0 || !px->srv) ? 1 : 0);
+					break;
+				case ST_F_SCUR:
+					metric = mkf_u32(0, px->beconn);
+					break;
+				case ST_F_SMAX:
+					metric = mkf_u32(FN_MAX, px->be_counters.conn_max);
+					break;
+				case ST_F_SLIM:
+					metric = mkf_u32(FO_CONFIG|FN_LIMIT, px->fullconn);
+					break;
+				case ST_F_STOT:
+					metric = mkf_u64(FN_COUNTER, px->be_counters.cum_conn);
+					break;
+				case ST_F_RATE:
+					metric = mkf_u32(0, read_freq_ctr(&px->be_sess_per_sec));
+					break;
+				case ST_F_RATE_MAX:
+					metric = mkf_u32(0, px->be_counters.sps_max);
+					break;
+				case ST_F_LASTSESS:
+					metric = mkf_s32(FN_AGE, be_lastsession(px));
+					break;
+				case ST_F_QCUR:
+					metric = mkf_u32(0, px->nbpend);
+					break;
+				case ST_F_QMAX:
+					metric = mkf_u32(FN_MAX, px->be_counters.nbpend_max);
+					break;
+				case ST_F_CONNECT:
+					metric = mkf_u64(FN_COUNTER, px->be_counters.connect);
+					break;
+				case ST_F_REUSE:
+					metric = mkf_u64(FN_COUNTER, px->be_counters.reuse);
+					break;
+				case ST_F_BIN:
+					metric = mkf_u64(FN_COUNTER, px->be_counters.bytes_in);
+					break;
+				case ST_F_BOUT:
+					metric = mkf_u64(FN_COUNTER, px->be_counters.bytes_out);
+					break;
+				case ST_F_QTIME:
+					metric = mkf_u32(FN_AVG, swrate_avg(px->be_counters.q_time, TIME_STATS_SAMPLES));
+					break;
+				case ST_F_CTIME:
+					metric = mkf_u32(FN_AVG, swrate_avg(px->be_counters.c_time, TIME_STATS_SAMPLES));
+					break;
+				case ST_F_RTIME:
+					metric = mkf_u32(FN_AVG, swrate_avg(px->be_counters.d_time, TIME_STATS_SAMPLES));
+					break;
+				case ST_F_TTIME:
+					metric = mkf_u32(FN_AVG, swrate_avg(px->be_counters.t_time, TIME_STATS_SAMPLES));
+					break;
+				case ST_F_DREQ:
+					metric = mkf_u64(FN_COUNTER, px->be_counters.denied_req);
+					break;
+				case ST_F_DRESP:
+					metric = mkf_u64(FN_COUNTER, px->be_counters.denied_resp);
+					break;
+				case ST_F_ECON:
+					metric = mkf_u64(FN_COUNTER, px->be_counters.failed_conns);
+					break;
+				case ST_F_ERESP:
+					metric = mkf_u64(FN_COUNTER, px->be_counters.failed_resp);
+					break;
+				case ST_F_WRETR:
+					metric = mkf_u64(FN_COUNTER, px->be_counters.retries);
+					break;
+				case ST_F_WREDIS:
+					metric = mkf_u64(FN_COUNTER, px->be_counters.redispatches);
+					break;
+				case ST_F_WREW:
+					metric = mkf_u64(FN_COUNTER, px->be_counters.failed_rewrites);
+					break;
+				case ST_F_CLI_ABRT:
+					metric = mkf_u64(FN_COUNTER, px->be_counters.cli_aborts);
+					break;
+				case ST_F_SRV_ABRT:
+					metric = mkf_u64(FN_COUNTER, px->be_counters.srv_aborts);
+					break;
+				case ST_F_WEIGHT:
+					weight = (px->lbprm.tot_weight * px->lbprm.wmult + px->lbprm.wdiv - 1) / px->lbprm.wdiv;
+					metric = mkf_u32(FN_AVG, weight);
+					break;
+				case ST_F_ACT:
+					metric = mkf_u32(0, px->srv_act);
+					break;
+				case ST_F_BCK:
+					metric = mkf_u32(0, px->srv_bck);
+					break;
+				case ST_F_CHKDOWN:
+					metric = mkf_u64(FN_COUNTER, px->down_trans);
+					break;
+				case ST_F_LASTCHG:
+					metric = mkf_u32(FN_AGE, now.tv_sec - px->last_change);
+					break;
+				case ST_F_DOWNTIME:
+					metric = mkf_u32(FN_COUNTER, be_downtime(px));
+					break;
+				case ST_F_LBTOT:
+					metric = mkf_u64(FN_COUNTER, px->be_counters.cum_lbconn);
+					break;
+				case ST_F_REQ_TOT:
+					if (px->mode != PR_MODE_HTTP)
+						goto next_px;
+					metric = mkf_u64(FN_COUNTER, px->be_counters.p.http.cum_req);
+					break;
+				case ST_F_HRSP_1XX:
+					if (px->mode != PR_MODE_HTTP)
+						goto next_px;
+					metric = mkf_u64(FN_COUNTER, px->be_counters.p.http.rsp[1]);
+					break;
+				case ST_F_HRSP_2XX:
+					if (px->mode != PR_MODE_HTTP)
+						goto next_px;
+					appctx->ctx.stats.flags &= ~PROMEX_FL_METRIC_HDR;
+					metric = mkf_u64(FN_COUNTER, px->be_counters.p.http.rsp[2]);
+					break;
+				case ST_F_HRSP_3XX:
+					if (px->mode != PR_MODE_HTTP)
+						goto next_px;
+					appctx->ctx.stats.flags &= ~PROMEX_FL_METRIC_HDR;
+					metric = mkf_u64(FN_COUNTER, px->be_counters.p.http.rsp[3]);
+					break;
+				case ST_F_HRSP_4XX:
+					if (px->mode != PR_MODE_HTTP)
+						goto next_px;
+					appctx->ctx.stats.flags &= ~PROMEX_FL_METRIC_HDR;
+					metric = mkf_u64(FN_COUNTER, px->be_counters.p.http.rsp[4]);
+					break;
+				case ST_F_HRSP_5XX:
+					if (px->mode != PR_MODE_HTTP)
+						goto next_px;
+					appctx->ctx.stats.flags &= ~PROMEX_FL_METRIC_HDR;
+					metric = mkf_u64(FN_COUNTER, px->be_counters.p.http.rsp[5]);
+					break;
+				case ST_F_HRSP_OTHER:
+					if (px->mode != PR_MODE_HTTP)
+						goto next_px;
+					appctx->ctx.stats.flags &= ~PROMEX_FL_METRIC_HDR;
+					metric = mkf_u64(FN_COUNTER, px->be_counters.p.http.rsp[0]);
+					break;
+				case ST_F_CACHE_LOOKUPS:
+					if (px->mode != PR_MODE_HTTP)
+						goto next_px;
+					metric = mkf_u64(FN_COUNTER, px->be_counters.p.http.cache_lookups);
+					break;
+				case ST_F_CACHE_HITS:
+					if (px->mode != PR_MODE_HTTP)
+						goto next_px;
+					metric = mkf_u64(FN_COUNTER, px->be_counters.p.http.cache_hits);
+					break;
+				case ST_F_COMP_IN:
+					if (px->mode != PR_MODE_HTTP)
+						goto next_px;
+					metric = mkf_u64(FN_COUNTER, px->be_counters.comp_in);
+					break;
+				case ST_F_COMP_OUT:
+					if (px->mode != PR_MODE_HTTP)
+						goto next_px;
+					metric = mkf_u64(FN_COUNTER, px->be_counters.comp_out);
+					break;
+				case ST_F_COMP_BYP:
+					if (px->mode != PR_MODE_HTTP)
+						goto next_px;
+					metric = mkf_u64(FN_COUNTER, px->be_counters.comp_byp);
+					break;
+				case ST_F_COMP_RSP:
+					if (px->mode != PR_MODE_HTTP)
+						goto next_px;
+					metric = mkf_u64(FN_COUNTER, px->be_counters.p.http.comp_rsp);
+					break;
+
+				default:
+					goto next_metric;
+			}
+
+			if (!promex_dump_metric(appctx, htx, prefix, &metric, &out, max))
+				goto full;
+		  next_px:
+			appctx->ctx.stats.px = px->next;
+		}
+	  next_metric:
+		appctx->ctx.stats.flags |= PROMEX_FL_METRIC_HDR;
+		appctx->ctx.stats.px = proxies_list;
+		appctx->st2 = promex_back_metrics[appctx->st2];
+	}
+
+  end:
+	if (!htx_add_data(htx, out))
+		return -1; /* Unexpected and unrecoverable error */
+	channel_add_input(chn, out.len);
+	return ret;
+  full:
+	ret = 0;
+	goto end;
+}
+
+/* Dump servers metrics (prefixed by "haproxy_server_"). It returns 1 on sucess,
+ * 0 if <htx> is full and -1 in case of any error. */
+static int promex_dump_srv_metrics(struct appctx *appctx, struct htx *htx)
+{
+	static struct ist prefix = IST("haproxy_server_");
+	struct proxy *px;
+	struct server *sv;
+	struct field metric;
+	struct channel *chn = si_ic(appctx->owner);
+	struct ist out = ist2(trash.area, 0);
+	size_t max = channel_htx_recv_max(chn, htx);
+	int ret = 1;
+	uint32_t weight;
+
+	while (appctx->st2 && appctx->st2 < ST_F_TOTAL_FIELDS) {
+		while (appctx->ctx.stats.px) {
+			px = appctx->ctx.stats.px;
+
+			/* skip the disabled proxies, global frontend and non-networked ones */
+			if (px->state == PR_STSTOPPED || px->uuid <= 0 || !(px->cap & PR_CAP_BE))
+				goto next_px;
+
+			while (appctx->ctx.stats.sv) {
+				sv = appctx->ctx.stats.sv;
+
+				switch (appctx->st2) {
+					case ST_F_STATUS:
+						metric = mkf_u32(FO_STATUS, promex_srv_status(sv));
+						break;
+					case ST_F_SCUR:
+						metric = mkf_u32(0, sv->cur_sess);
+						break;
+					case ST_F_SMAX:
+						metric = mkf_u32(FN_MAX, sv->counters.cur_sess_max);
+						break;
+					case ST_F_SLIM:
+						metric = mkf_u32(FO_CONFIG|FN_LIMIT, sv->maxconn);
+						break;
+					case ST_F_STOT:
+						metric = mkf_u64(FN_COUNTER, sv->counters.cum_sess);
+						break;
+					case ST_F_RATE:
+						metric = mkf_u32(FN_RATE, read_freq_ctr(&sv->sess_per_sec));
+						break;
+					case ST_F_RATE_MAX:
+						metric = mkf_u32(FN_MAX, sv->counters.sps_max);
+						break;
+					case ST_F_LASTSESS:
+						metric = mkf_s32(FN_AGE, srv_lastsession(sv));
+						break;
+					case ST_F_QCUR:
+						metric = mkf_u32(0, sv->nbpend);
+						break;
+					case ST_F_QMAX:
+						metric = mkf_u32(FN_MAX, sv->counters.nbpend_max);
+						break;
+					case ST_F_QLIMIT:
+						metric = mkf_u32(FO_CONFIG|FS_SERVICE, sv->maxqueue);
+						break;
+					case ST_F_BIN:
+						metric = mkf_u64(FN_COUNTER, sv->counters.bytes_in);
+						break;
+					case ST_F_BOUT:
+						metric = mkf_u64(FN_COUNTER, sv->counters.bytes_out);
+						break;
+					case ST_F_QTIME:
+						metric = mkf_u32(FN_AVG, swrate_avg(sv->counters.q_time, TIME_STATS_SAMPLES));
+						break;
+					case ST_F_CTIME:
+						metric = mkf_u32(FN_AVG, swrate_avg(sv->counters.c_time, TIME_STATS_SAMPLES));
+						break;
+					case ST_F_RTIME:
+						metric = mkf_u32(FN_AVG, swrate_avg(sv->counters.d_time, TIME_STATS_SAMPLES));
+						break;
+					case ST_F_TTIME:
+						metric = mkf_u32(FN_AVG, swrate_avg(sv->counters.t_time, TIME_STATS_SAMPLES));
+						break;
+					case ST_F_CONNECT:
+						metric = mkf_u64(FN_COUNTER, sv->counters.connect);
+						break;
+					case ST_F_REUSE:
+						metric = mkf_u64(FN_COUNTER, sv->counters.reuse);
+						break;
+					case ST_F_DRESP:
+						metric = mkf_u64(FN_COUNTER, sv->counters.failed_secu);
+						break;
+					case ST_F_ECON:
+						metric = mkf_u64(FN_COUNTER, sv->counters.failed_conns);
+						break;
+					case ST_F_ERESP:
+						metric = mkf_u64(FN_COUNTER, sv->counters.failed_resp);
+						break;
+					case ST_F_WRETR:
+						metric = mkf_u64(FN_COUNTER, sv->counters.retries);
+						break;
+					case ST_F_WREDIS:
+						metric = mkf_u64(FN_COUNTER, sv->counters.redispatches);
+						break;
+					case ST_F_WREW:
+						metric = mkf_u64(FN_COUNTER, sv->counters.failed_rewrites);
+						break;
+					case ST_F_CLI_ABRT:
+						metric = mkf_u64(FN_COUNTER, sv->counters.cli_aborts);
+						break;
+					case ST_F_SRV_ABRT:
+						metric = mkf_u64(FN_COUNTER, sv->counters.srv_aborts);
+						break;
+					case ST_F_WEIGHT:
+						weight = (sv->cur_eweight * px->lbprm.wmult + px->lbprm.wdiv - 1) / px->lbprm.wdiv;
+						metric = mkf_u32(FN_AVG, weight);
+						break;
+					case ST_F_CHKFAIL:
+						metric = mkf_u64(FN_COUNTER, sv->counters.failed_checks);
+						break;
+					case ST_F_CHKDOWN:
+						metric = mkf_u64(FN_COUNTER, sv->counters.down_trans);
+						break;
+					case ST_F_DOWNTIME:
+						metric = mkf_u32(FN_COUNTER, srv_downtime(sv));
+						break;
+					case ST_F_LASTCHG:
+						metric = mkf_u32(FN_AGE, now.tv_sec - sv->last_change);
+						break;
+					case ST_F_THROTTLE:
+						metric = mkf_u32(FN_AVG, server_throttle_rate(sv));
+						break;
+					case ST_F_LBTOT:
+						metric = mkf_u64(FN_COUNTER, sv->counters.cum_lbconn);
+						break;
+					case ST_F_HRSP_1XX:
+						if (px->mode != PR_MODE_HTTP)
+							goto next_px;
+						metric = mkf_u64(FN_COUNTER, sv->counters.p.http.rsp[1]);
+						break;
+					case ST_F_HRSP_2XX:
+						if (px->mode != PR_MODE_HTTP)
+							goto next_px;
+						appctx->ctx.stats.flags &= ~PROMEX_FL_METRIC_HDR;
+						metric = mkf_u64(FN_COUNTER, sv->counters.p.http.rsp[2]);
+						break;
+					case ST_F_HRSP_3XX:
+						if (px->mode != PR_MODE_HTTP)
+							goto next_px;
+						appctx->ctx.stats.flags &= ~PROMEX_FL_METRIC_HDR;
+						metric = mkf_u64(FN_COUNTER, sv->counters.p.http.rsp[3]);
+						break;
+					case ST_F_HRSP_4XX:
+						if (px->mode != PR_MODE_HTTP)
+							goto next_px;
+						appctx->ctx.stats.flags &= ~PROMEX_FL_METRIC_HDR;
+						metric = mkf_u64(FN_COUNTER, sv->counters.p.http.rsp[4]);
+						break;
+					case ST_F_HRSP_5XX:
+						if (px->mode != PR_MODE_HTTP)
+							goto next_px;
+						appctx->ctx.stats.flags &= ~PROMEX_FL_METRIC_HDR;
+						metric = mkf_u64(FN_COUNTER, sv->counters.p.http.rsp[5]);
+						break;
+					case ST_F_HRSP_OTHER:
+						if (px->mode != PR_MODE_HTTP)
+							goto next_px;
+						appctx->ctx.stats.flags &= ~PROMEX_FL_METRIC_HDR;
+						metric = mkf_u64(FN_COUNTER, sv->counters.p.http.rsp[0]);
+						break;
+
+					default:
+						goto next_metric;
+				}
+
+				if (!promex_dump_metric(appctx, htx, prefix, &metric, &out, max))
+					goto full;
+
+				appctx->ctx.stats.sv = sv->next;
+			}
+
+		  next_px:
+			appctx->ctx.stats.px = px->next;
+			appctx->ctx.stats.sv = (appctx->ctx.stats.px ? appctx->ctx.stats.px->srv : NULL);
+		}
+	  next_metric:
+		appctx->ctx.stats.flags |= PROMEX_FL_METRIC_HDR;
+		appctx->ctx.stats.px = proxies_list;
+		appctx->ctx.stats.sv = (appctx->ctx.stats.px ? appctx->ctx.stats.px->srv : NULL);
+		appctx->st2 = promex_srv_metrics[appctx->st2];
+	}
+
+
+  end:
+	if (!htx_add_data(htx, out))
+		return -1; /* Unexpected and unrecoverable error */
+	channel_add_input(chn, out.len);
+	return ret;
+  full:
+	ret = 0;
+	goto end;
+}
+
+/* Dump all metrics (global, frontends, backends and servers) depending on the
+ * dumper state (appctx->st1). It returns 1 on success, 0 if <htx> is full and
+ * -1 in case of any error. */
+static int promex_dump_metrics(struct appctx *appctx, struct stream_interface *si, struct htx *htx)
+{
+	int ret;
+
+	switch (appctx->st1) {
+		case PROMEX_DUMPER_INIT:
+			appctx->ctx.stats.px = NULL;
+			appctx->ctx.stats.sv = NULL;
+			appctx->ctx.stats.flags = (PROMEX_FL_METRIC_HDR|PROMEX_FL_INFO_METRIC);
+			appctx->st2 = promex_global_metrics[INF_NAME];
+			appctx->st1 = PROMEX_DUMPER_GLOBAL;
+			/* fall through */
+
+		case PROMEX_DUMPER_GLOBAL:
+			ret = promex_dump_global_metrics(appctx, htx);
+			if (ret <= 0) {
+				if (ret == -1)
+					goto error;
+				goto full;
+			}
+
+			appctx->ctx.stats.px = proxies_list;
+			appctx->ctx.stats.sv = NULL;
+			appctx->ctx.stats.flags = (PROMEX_FL_METRIC_HDR|PROMEX_FL_STATS_METRIC);
+			appctx->st2 = promex_front_metrics[ST_F_PXNAME];
+			appctx->st1 = PROMEX_DUMPER_FRONT;
+			/* fall through */
+
+		case PROMEX_DUMPER_FRONT:
+			ret = promex_dump_front_metrics(appctx, htx);
+			if (ret <= 0) {
+				if (ret == -1)
+					goto error;
+				goto full;
+			}
+
+			appctx->ctx.stats.px = proxies_list;
+			appctx->ctx.stats.sv = NULL;
+			appctx->ctx.stats.flags = (PROMEX_FL_METRIC_HDR|PROMEX_FL_STATS_METRIC);
+			appctx->st2 = promex_back_metrics[ST_F_PXNAME];
+			appctx->st1 = PROMEX_DUMPER_BACK;
+			/* fall through */
+
+		case PROMEX_DUMPER_BACK:
+			ret = promex_dump_back_metrics(appctx, htx);
+			if (ret <= 0) {
+				if (ret == -1)
+					goto error;
+				goto full;
+			}
+
+			appctx->ctx.stats.px = proxies_list;
+			appctx->ctx.stats.sv = (appctx->ctx.stats.px ? appctx->ctx.stats.px->srv : NULL);
+			appctx->ctx.stats.flags = (PROMEX_FL_METRIC_HDR|PROMEX_FL_STATS_METRIC);
+			appctx->st2 = promex_srv_metrics[ST_F_PXNAME];
+			appctx->st1 = PROMEX_DUMPER_SRV;
+			/* fall through */
+
+		case PROMEX_DUMPER_SRV:
+			ret = promex_dump_srv_metrics(appctx, htx);
+			if (ret <= 0) {
+				if (ret == -1)
+					goto error;
+				goto full;
+			}
+
+			appctx->ctx.stats.px = NULL;
+			appctx->ctx.stats.sv = NULL;
+			appctx->ctx.stats.flags = 0;
+			appctx->st2 = 0;
+			appctx->st1 = PROMEX_DUMPER_DONE;
+			/* fall through */
+
+		case PROMEX_DUMPER_DONE:
+		default:
+			break;
+	}
+
+	return 1;
+
+  full:
+	si_rx_room_blk(si);
+	return 0;
+  error:
+	/* unrecoverable error */
+	appctx->ctx.stats.px = NULL;
+	appctx->ctx.stats.sv = NULL;
+	appctx->ctx.stats.flags = 0;
+	appctx->st2 = 0;
+	appctx->st1 = PROMEX_DUMPER_DONE;
+	return -1;
+}
+
+/* Send HTTP headers of the response. It returns 1 on success and 0 if <htx> is
+ * full. */
+static int promex_send_headers(struct appctx *appctx, struct stream_interface *si, struct htx *htx)
+{
+	struct htx_sl *sl;
+	unsigned int flags;
+
+	flags = (HTX_SL_F_IS_RESP|HTX_SL_F_VER_11|HTX_SL_F_XFER_ENC|HTX_SL_F_XFER_LEN|HTX_SL_F_CHNK);
+	sl = htx_add_stline(htx, HTX_BLK_RES_SL, flags, ist("HTTP/1.1"), ist("200"), ist("OK"));
+	if (!sl)
+		goto full;
+	sl->info.res.status = 200;
+	if (!htx_add_header(htx, ist("Cache-Control"), ist("no-cache")) ||
+	    !htx_add_header(htx, ist("Connection"), ist("close")) ||
+	    !htx_add_header(htx, ist("Content-Type"), ist("text/plain; version=0.0.4")) ||
+	    !htx_add_header(htx, ist("Transfer-Encoding"), ist("chunked")) ||
+	    !htx_add_endof(htx, HTX_BLK_EOH))
+		goto full;
+
+	return 1;
+  full:
+	htx_reset(htx);
+	si_rx_room_blk(si);
+	return 0;
+}
+
+/* The function returns 1 if the initialisation is complete, 0 if
+ * an errors occurs and -1 if more data are required for initializing
+ * the applet.
+ */
+static int promex_appctx_init(struct appctx *appctx, struct proxy *px, struct stream *strm)
+{
+	appctx->st0 = PROMEX_ST_INIT;
+	return 1;
+}
+
+/* The main I/O handler for the promex applet. */
+static void promex_appctx_handle_io(struct appctx *appctx)
+{
+	struct stream_interface *si = appctx->owner;
+	struct stream *s = si_strm(si);
+	struct channel *req = si_oc(si);
+	struct channel *res = si_ic(si);
+	struct htx *req_htx, *res_htx;
+	int ret;
+
+	res_htx = htx_from_buf(&res->buf);
+
+	if (unlikely(si->state == SI_ST_DIS || si->state == SI_ST_CLO))
+		goto out;
+
+	/* Check if the input buffer is avalaible. */
+	if (!b_size(&res->buf)) {
+		si_rx_room_blk(si);
+		goto out;
+	}
+
+	switch (appctx->st0) {
+		case PROMEX_ST_INIT:
+			appctx->st0 = PROMEX_ST_HEAD;
+			appctx->st1 = PROMEX_DUMPER_INIT;
+			/* fall through */
+
+		case PROMEX_ST_HEAD:
+			if (!promex_send_headers(appctx, si, res_htx))
+				goto out;
+			appctx->st0 = ((s->txn->meth == HTTP_METH_HEAD) ? PROMEX_ST_DONE : PROMEX_ST_DUMP);
+			/* fall through */
+
+		case PROMEX_ST_DUMP:
+			ret = promex_dump_metrics(appctx, si, res_htx);
+			if (ret <= 0) {
+				if (ret == -1)
+					goto error;
+				goto out;
+			}
+			appctx->st0 = PROMEX_ST_DONE;
+			/* fall through */
+
+		case PROMEX_ST_DONE:
+			/* Don't add EOD and TLR because mux-h1 will take care of it */
+			if (!htx_add_endof(res_htx, HTX_BLK_EOM)) {
+				si_rx_room_blk(si);
+				goto out;
+			}
+			res->flags |= CF_READ_NULL;
+
+			/* eat the whole request */
+			req_htx = htxbuf(&req->buf);
+			htx_reset(req_htx);
+			htx_to_buf(req_htx, &req->buf);
+			co_set_data(req, 0);
+
+			/* Set SI flags */
+			if (!(s->flags & SF_ERR_MASK))      // this is not really an error but it is
+				s->flags |= SF_ERR_LOCAL;   // to mark that it comes from the proxy
+			if (!(s->flags & SF_FINST_MASK))
+				s->flags |= SF_FINST_R;
+
+			si_shutr(si);
+
+		case PROMEX_ST_ERROR:
+			return;
+	}
+
+	if ((res->flags & CF_SHUTR) && (si->state == SI_ST_EST))
+		si_shutw(si);
+
+  out:
+	htx_to_buf(res_htx, &res->buf);
+	if (!channel_is_empty(res))
+		si_stop_get(si);
+	return;
+
+  error:
+	res->flags |= CF_READ_NULL;
+	si_shutr(si);
+	si_shutw(si);
+}
+
+struct applet promex_applet = {
+	.obj_type = OBJ_TYPE_APPLET,
+	.name = "<PROMEX>", /* used for logging */
+	.init = promex_appctx_init,
+	.fct = promex_appctx_handle_io,
+};
+
+static enum act_parse_ret service_parse_prometheus_exporter(const char **args, int *cur_arg, struct proxy *px,
+							    struct act_rule *rule, char **err)
+{
+	/* Prometheus exporter service is only available on "http-request" rulesets */
+	if (rule->from != ACT_F_HTTP_REQ) {
+		memprintf(err, "Prometheus exporter service only available on 'http-request' rulesets");
+		return ACT_RET_PRS_ERR;
+	}
+	if (!(px->options2 & PR_O2_USE_HTX)) {
+		memprintf(err, "Prometheus exporter service only available for HTX proxies");
+		return ACT_RET_PRS_ERR;
+	}
+
+	/* Add applet pointer in the rule. */
+	rule->applet = promex_applet;
+
+	return ACT_RET_PRS_OK;
+}
+static void promex_register_build_options(void)
+{
+        char *ptr = NULL;
+
+        memprintf(&ptr, "Built with the Prometheus exporter as a service");
+        hap_register_build_opts(ptr, 1);
+}
+
+
+static struct action_kw_list service_actions = { ILH, {
+	{ "prometheus-exporter", service_parse_prometheus_exporter },
+	{ /* END */ }
+}};
+
+INITCALL1(STG_REGISTER, service_keywords_register, &service_actions);
+INITCALL0(STG_REGISTER, promex_register_build_options);