MINOR: systemd wrapper: add support for passing the -x option.
Make the systemd wrapper chech if HAPROXY_STATS_SOCKET if set.
If set, it will use it as an argument to the "-x" option, which makes
haproxy asks for any listening socket, on the stats socket, in order
to achieve reloads with no new connection lost.
diff --git a/contrib/systemd/haproxy.service.in b/contrib/systemd/haproxy.service.in
index dca81a2..05bb716 100644
--- a/contrib/systemd/haproxy.service.in
+++ b/contrib/systemd/haproxy.service.in
@@ -3,6 +3,8 @@
After=network.target
[Service]
+# You can point the environment variable HAPROXY_STATS_SOCKET to a stats
+# socket if you want seamless reloads.
Environment="CONFIG=/etc/haproxy/haproxy.cfg" "PIDFILE=/run/haproxy.pid"
ExecStartPre=@SBINDIR@/haproxy -f $CONFIG -c -q
ExecStart=@SBINDIR@/haproxy-systemd-wrapper -f $CONFIG -p $PIDFILE
diff --git a/src/haproxy-systemd-wrapper.c b/src/haproxy-systemd-wrapper.c
index f6a9c85..457f5bd 100644
--- a/src/haproxy-systemd-wrapper.c
+++ b/src/haproxy-systemd-wrapper.c
@@ -92,11 +92,15 @@
pid = fork();
if (!pid) {
char **argv;
+ char *stats_socket = NULL;
int i;
int argno = 0;
/* 3 for "haproxy -Ds -sf" */
- argv = calloc(4 + main_argc + nb_pid + 1, sizeof(char *));
+ if (nb_pid > 0)
+ stats_socket = getenv("HAPROXY_STATS_SOCKET");
+ argv = calloc(4 + main_argc + nb_pid + 1 +
+ (stats_socket != NULL ? 2 : 0), sizeof(char *));
if (!argv) {
fprintf(stderr, SD_NOTICE "haproxy-systemd-wrapper: failed to calloc(), please try again later.\n");
exit(1);
@@ -121,6 +125,10 @@
argv[argno++] = "-sf";
for (i = 0; i < nb_pid; ++i)
argv[argno++] = pid_strv[i];
+ if (stats_socket != NULL) {
+ argv[argno++] = "-x";
+ argv[argno++] = stats_socket;
+ }
}
argv[argno] = NULL;