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Willy Tarreaubaaee002006-06-26 02:48:02 +02001/*
Willy Tarreaudeb9ed82010-01-03 21:03:22 +01002 * include/common/defaults.h
3 * Miscellaneous default values.
4 *
5 * Copyright (C) 2000-2010 Willy Tarreau - w@1wt.eu
6 *
7 * This library is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU Lesser General Public
9 * License as published by the Free Software Foundation, version 2.1
10 * exclusively.
11 *
12 * This library is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * Lesser General Public License for more details.
16 *
17 * You should have received a copy of the GNU Lesser General Public
18 * License along with this library; if not, write to the Free Software
19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
20 */
Willy Tarreaubaaee002006-06-26 02:48:02 +020021
Willy Tarreau2dd0d472006-06-29 17:53:05 +020022#ifndef _COMMON_DEFAULTS_H
23#define _COMMON_DEFAULTS_H
Willy Tarreaubaaee002006-06-26 02:48:02 +020024
Willy Tarreaubaaee002006-06-26 02:48:02 +020025/*
26 * BUFSIZE defines the size of a read and write buffer. It is the maximum
27 * amount of bytes which can be stored by the proxy for each session. However,
28 * when reading HTTP headers, the proxy needs some spare space to add or rewrite
29 * headers if needed. The size of this spare is defined with MAXREWRITE. So it
30 * is not possible to process headers longer than BUFSIZE-MAXREWRITE bytes. By
31 * default, BUFSIZE=16384 bytes and MAXREWRITE=BUFSIZE/2, so the maximum length
32 * of headers accepted is 8192 bytes, which is in line with Apache's limits.
33 */
34#ifndef BUFSIZE
35#define BUFSIZE 16384
36#endif
37
38// reserved buffer space for header rewriting
39#ifndef MAXREWRITE
40#define MAXREWRITE (BUFSIZE / 2)
41#endif
42
43#define REQURI_LEN 1024
44#define CAPTURE_LEN 64
45
Krzysztof Piotr Oledzkie6bbd742007-11-01 00:33:12 +010046// maximum line size when parsing config
47#ifndef LINESIZE
48#define LINESIZE 2048
49#endif
50
Willy Tarreaubaaee002006-06-26 02:48:02 +020051// max # args on a configuration line
Krzysztof Piotr Oledzkie6bbd742007-11-01 00:33:12 +010052#define MAX_LINE_ARGS 64
Willy Tarreaubaaee002006-06-26 02:48:02 +020053
Willy Tarreau5ca791d2009-08-16 19:06:42 +020054// max # args on a stats socket
55#define MAX_STATS_ARGS 16
Krzysztof Piotr Oledzki2c6962c2008-03-02 02:42:14 +010056
Willy Tarreaubaaee002006-06-26 02:48:02 +020057// max # of matches per regexp
58#define MAX_MATCH 10
59
Willy Tarreaue5f20dc2006-12-03 15:21:35 +010060// max # of headers in one HTTP request or response
61// By default, about 100 headers per 8 kB.
62#ifndef MAX_HTTP_HDR
63#define MAX_HTTP_HDR ((BUFSIZE+79)/80)
64#endif
65
Willy Tarreaubce70882009-09-07 11:51:47 +020066// max # of headers in history when looking for header #-X
67#ifndef MAX_HDR_HISTORY
68#define MAX_HDR_HISTORY 10
69#endif
70
Willy Tarreaub8949f12007-03-23 22:39:59 +010071// max # of loops we can perform around a read() which succeeds.
72// It's very frequent that the system returns a few TCP segments at a time.
73#ifndef MAX_READ_POLL_LOOPS
74#define MAX_READ_POLL_LOOPS 4
75#endif
76
Willy Tarreau6f4a82c2009-03-21 20:43:57 +010077// minimum number of bytes read at once above which we don't try to read
78// more, in order not to risk facing an EAGAIN. Most often, if we read
79// at least 10 kB, we can consider that the system has tried to read a
80// full buffer and got multiple segments (>1 MSS for jumbo frames, >7 MSS
81// for normal frames) did not bother truncating the last segment.
82#ifndef MIN_RECV_AT_ONCE_ENOUGH
83#define MIN_RECV_AT_ONCE_ENOUGH (7*1448)
84#endif
85
Willy Tarreau83749182007-04-15 20:56:27 +020086// same, but for writes. Generally, it's enough to write twice: one time for
87// first half of the buffer, and a second time for the last half after a
88// wrap-around.
89#ifndef MAX_WRITE_POLL_LOOPS
90#define MAX_WRITE_POLL_LOOPS 2
91#endif
92
Willy Tarreau9641e8f2007-03-23 23:02:09 +010093// the number of bytes returned by a read below which we will not try to
94// poll the socket again. Generally, return values below the MSS are worthless
95// to try again.
96#ifndef MIN_RET_FOR_READ_LOOP
97#define MIN_RET_FOR_READ_LOOP 1460
98#endif
99
Willy Tarreau14acc702011-05-11 20:47:24 +0200100// The minimum number of bytes to be forwarded that is worth trying to splice.
101// Below 4kB, it's not worth allocating pipes nor pretending to zero-copy.
102#ifndef MIN_SPLICE_FORWARD
103#define MIN_SPLICE_FORWARD 4096
104#endif
105
Willy Tarreau1db37712007-06-03 17:16:49 +0200106// the max number of events returned in one call to poll/epoll. Too small a
107// value will cause lots of calls, and too high a value may cause high latency.
108#ifndef MAX_POLL_EVENTS
109#define MAX_POLL_EVENTS 200
110#endif
111
Willy Tarreaubaaee002006-06-26 02:48:02 +0200112// cookie delimitor in "prefix" mode. This character is inserted between the
113// persistence cookie and the original value. The '~' is allowed by RFC2965,
114// and should not be too common in server names.
115#ifndef COOKIE_DELIM
116#define COOKIE_DELIM '~'
117#endif
118
Willy Tarreaubca99692010-10-06 19:25:55 +0200119// this delimitor is used between a server's name and a last visit date in
120// cookies exchanged with the client.
121#ifndef COOKIE_DELIM_DATE
122#define COOKIE_DELIM_DATE '|'
123#endif
124
Willy Tarreaubaaee002006-06-26 02:48:02 +0200125#define CONN_RETRIES 3
126
127#define CHK_CONNTIME 2000
128#define DEF_CHKINTR 2000
129#define DEF_FALLTIME 3
130#define DEF_RISETIME 2
Willy Tarreaue9d87882010-01-27 11:28:42 +0100131#define DEF_CHECK_REQ "OPTIONS / HTTP/1.0\r\n"
Willy Tarreau23677902007-05-08 23:50:35 +0200132#define DEF_SMTP_CHECK_REQ "HELO localhost\r\n"
Gabor Lekenyb4c81e42010-09-29 18:17:05 +0200133#define DEF_LDAP_CHECK_REQ "\x30\x0c\x02\x01\x01\x60\x07\x02\x01\x03\x04\x00\x80\x00"
Willy Tarreaubaaee002006-06-26 02:48:02 +0200134
Krzysztof Piotr Oledzki97f07b82009-12-15 22:31:24 +0100135#define DEF_HANA_ONERR HANA_ONERR_FAILCHK
136#define DEF_HANA_ERRLIMIT 10
137
Ross Westaf72a1d2008-08-03 10:51:45 +0200138// X-Forwarded-For header default
139#define DEF_XFORWARDFOR_HDR "X-Forwarded-For"
140
Maik Broemme2850cb42009-04-17 18:53:21 +0200141// X-Original-To header default
142#define DEF_XORIGINALTO_HDR "X-Original-To"
143
Willy Tarreaubaaee002006-06-26 02:48:02 +0200144/* Default connections limit.
145 *
146 * A system limit can be enforced at build time in order to avoid using haproxy
147 * beyond reasonable system limits. For this, just define SYSTEM_MAXCONN to the
148 * absolute limit accepted by the system. If the configuration specifies a
149 * higher value, it will be capped to SYSTEM_MAXCONN and a warning will be
150 * emitted. The only way to override this limit will be to set it via the
151 * command-line '-n' argument.
152 */
153#ifndef SYSTEM_MAXCONN
Willy Tarreauc9fe4562009-06-15 16:33:36 +0200154#ifndef DEFAULT_MAXCONN
Willy Tarreaubaaee002006-06-26 02:48:02 +0200155#define DEFAULT_MAXCONN 2000
Willy Tarreauc9fe4562009-06-15 16:33:36 +0200156#endif
Willy Tarreaubaaee002006-06-26 02:48:02 +0200157#else
Willy Tarreauc9fe4562009-06-15 16:33:36 +0200158#undef DEFAULT_MAXCONN
Willy Tarreaubaaee002006-06-26 02:48:02 +0200159#define DEFAULT_MAXCONN SYSTEM_MAXCONN
160#endif
161
Willy Tarreau2c43a1e2007-10-14 23:05:39 +0200162/* Minimum check interval for spread health checks. Servers with intervals
163 * greater than or equal to this value will have their checks spread apart
164 * and will be considered when searching the minimal interval.
165 * Others will be ignored for the minimal interval and will have their checks
166 * scheduled on a different basis.
167 */
168#ifndef SRV_CHK_INTER_THRES
169#define SRV_CHK_INTER_THRES 1000
170#endif
171
Krzysztof Oledzkid9db9272007-10-15 10:05:11 +0200172/* Specifies the string used to report the version and release date on the
173 * statistics page. May be defined to the empty string ("") to permanently
174 * disable the feature.
175 */
176#ifndef STATS_VERSION_STRING
177#define STATS_VERSION_STRING " version " HAPROXY_VERSION ", released " HAPROXY_DATE
178#endif
179
Willy Tarreau8f38bd02009-05-10 08:53:33 +0200180/* Maximum signal queue size, and also number of different signals we can
181 * handle.
182 */
183#ifndef MAX_SIGNAL
184#define MAX_SIGNAL 256
185#endif
186
Willy Tarreau3ad6a762009-08-16 10:08:02 +0200187/* Maximum host name length */
188#ifndef MAX_HOSTNAME_LEN
189#define MAX_HOSTNAME_LEN 32
190#endif
191
Krzysztof Piotr Oledzkif7089f52009-10-10 21:06:49 +0200192/* Maximum health check description length */
193#ifndef HCHK_DESC_LEN
194#define HCHK_DESC_LEN 128
195#endif
196
Willy Tarreau2dd0d472006-06-29 17:53:05 +0200197#endif /* _COMMON_DEFAULTS_H */