/* * include/common/defaults.h * Miscellaneous default values. * * Copyright (C) 2000-2010 Willy Tarreau - w@1wt.eu * * This library is free software; you can redistribute it and/or * modify it under the terms of the GNU Lesser General Public * License as published by the Free Software Foundation, version 2.1 * exclusively. * * This library is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * Lesser General Public License for more details. * * You should have received a copy of the GNU Lesser General Public * License along with this library; if not, write to the Free Software * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA */ #ifndef _COMMON_DEFAULTS_H #define _COMMON_DEFAULTS_H /* * BUFSIZE defines the size of a read and write buffer. It is the maximum * amount of bytes which can be stored by the proxy for each stream. However, * when reading HTTP headers, the proxy needs some spare space to add or rewrite * headers if needed. The size of this spare is defined with MAXREWRITE. So it * is not possible to process headers longer than BUFSIZE-MAXREWRITE bytes. By * default, BUFSIZE=16384 bytes and MAXREWRITE=BUFSIZE/2, so the maximum length * of headers accepted is 8192 bytes, which is in line with Apache's limits. */ #ifndef BUFSIZE #define BUFSIZE 16384 #endif /* certain buffers may only be allocated for responses in order to avoid * deadlocks caused by request queuing. 2 buffers is the absolute minimum * acceptable to ensure that a request gaining access to a server can get * a response buffer even if it doesn't completely flush the request buffer. * The worst case is an applet making use of a request buffer that cannot * completely be sent while the server starts to respond, and all unreserved * buffers are allocated by request buffers from pending connections in the * queue waiting for this one to flush. Both buffers reserved buffers may * thus be used at the same time. */ #ifndef RESERVED_BUFS #define RESERVED_BUFS 2 #endif // reserved buffer space for header rewriting #ifndef MAXREWRITE #define MAXREWRITE (BUFSIZE / 2) #endif #ifndef REQURI_LEN #define REQURI_LEN 1024 #endif #ifndef CAPTURE_LEN #define CAPTURE_LEN 64 #endif #ifndef MAX_SYSLOG_LEN #define MAX_SYSLOG_LEN 1024 #endif // maximum line size when parsing config #ifndef LINESIZE #define LINESIZE 2048 #endif // max # args on a configuration line #define MAX_LINE_ARGS 64 // max # args on a stats socket // This should cover at least 5 + twice the # of data_types #define MAX_STATS_ARGS 64 // max # of matches per regexp #define MAX_MATCH 10 // max # of headers in one HTTP request or response // By default, about 100 headers (+1 for the first line) #ifndef MAX_HTTP_HDR #define MAX_HTTP_HDR 101 #endif // max # of headers in history when looking for header #-X #ifndef MAX_HDR_HISTORY #define MAX_HDR_HISTORY 10 #endif // max # of stick counters per session (at least 3 for sc0..sc2) #ifndef MAX_SESS_STKCTR #define MAX_SESS_STKCTR 3 #endif // max # of extra stick-table data types that can be registred at runtime #ifndef STKTABLE_EXTRA_DATA_TYPES #define STKTABLE_EXTRA_DATA_TYPES 0 #endif // max # of loops we can perform around a read() which succeeds. // It's very frequent that the system returns a few TCP segments at a time. #ifndef MAX_READ_POLL_LOOPS #define MAX_READ_POLL_LOOPS 4 #endif // minimum number of bytes read at once above which we don't try to read // more, in order not to risk facing an EAGAIN. Most often, if we read // at least 10 kB, we can consider that the system has tried to read a // full buffer and got multiple segments (>1 MSS for jumbo frames, >7 MSS // for normal frames) did not bother truncating the last segment. #ifndef MIN_RECV_AT_ONCE_ENOUGH #define MIN_RECV_AT_ONCE_ENOUGH (7*1448) #endif // The minimum number of bytes to be forwarded that is worth trying to splice. // Below 4kB, it's not worth allocating pipes nor pretending to zero-copy. #ifndef MIN_SPLICE_FORWARD #define MIN_SPLICE_FORWARD 4096 #endif // the max number of events returned in one call to poll/epoll. Too small a // value will cause lots of calls, and too high a value may cause high latency. #ifndef MAX_POLL_EVENTS #define MAX_POLL_EVENTS 200 #endif // cookie delimitor in "prefix" mode. This character is inserted between the // persistence cookie and the original value. The '~' is allowed by RFC2965, // and should not be too common in server names. #ifndef COOKIE_DELIM #define COOKIE_DELIM '~' #endif // this delimitor is used between a server's name and a last visit date in // cookies exchanged with the client. #ifndef COOKIE_DELIM_DATE #define COOKIE_DELIM_DATE '|' #endif #define CONN_RETRIES 3 #define CHK_CONNTIME 2000 #define DEF_CHKINTR 2000 #define DEF_FALLTIME 3 #define DEF_RISETIME 2 #define DEF_AGENT_FALLTIME 1 #define DEF_AGENT_RISETIME 1 #define DEF_CHECK_REQ "OPTIONS / HTTP/1.0\r\n" #define DEF_CHECK_PATH "" #define DEF_SMTP_CHECK_REQ "HELO localhost\r\n" #define DEF_LDAP_CHECK_REQ "\x30\x0c\x02\x01\x01\x60\x07\x02\x01\x03\x04\x00\x80\x00" #define DEF_REDIS_CHECK_REQ "*1\r\n$4\r\nPING\r\n" #define DEF_HANA_ONERR HANA_ONERR_FAILCHK #define DEF_HANA_ERRLIMIT 10 // X-Forwarded-For header default #define DEF_XFORWARDFOR_HDR "X-Forwarded-For" // X-Original-To header default #define DEF_XORIGINALTO_HDR "X-Original-To" /* Default connections limit. * * A system limit can be enforced at build time in order to avoid using haproxy * beyond reasonable system limits. For this, just define SYSTEM_MAXCONN to the * absolute limit accepted by the system. If the configuration specifies a * higher value, it will be capped to SYSTEM_MAXCONN and a warning will be * emitted. The only way to override this limit will be to set it via the * command-line '-n' argument. */ #ifndef SYSTEM_MAXCONN #ifndef DEFAULT_MAXCONN #define DEFAULT_MAXCONN 2000 #endif #else #undef DEFAULT_MAXCONN #define DEFAULT_MAXCONN SYSTEM_MAXCONN #endif /* Minimum check interval for spread health checks. Servers with intervals * greater than or equal to this value will have their checks spread apart * and will be considered when searching the minimal interval. * Others will be ignored for the minimal interval and will have their checks * scheduled on a different basis. */ #ifndef SRV_CHK_INTER_THRES #define SRV_CHK_INTER_THRES 1000 #endif /* Specifies the string used to report the version and release date on the * statistics page. May be defined to the empty string ("") to permanently * disable the feature. */ #ifndef STATS_VERSION_STRING #define STATS_VERSION_STRING " version " HAPROXY_VERSION ", released " HAPROXY_DATE #endif /* Maximum signal queue size, and also number of different signals we can * handle. */ #ifndef MAX_SIGNAL #define MAX_SIGNAL 256 #endif /* Maximum host name length */ #ifndef MAX_HOSTNAME_LEN #if MAXHOSTNAMELEN #define MAX_HOSTNAME_LEN MAXHOSTNAMELEN #else #define MAX_HOSTNAME_LEN 64 #endif // MAXHOSTNAMELEN #endif // MAX_HOSTNAME_LEN /* Maximum health check description length */ #ifndef HCHK_DESC_LEN #define HCHK_DESC_LEN 128 #endif /* ciphers used as defaults on connect */ #ifndef CONNECT_DEFAULT_CIPHERS #define CONNECT_DEFAULT_CIPHERS NULL #endif /* ciphers used as defaults on listeners */ #ifndef LISTEN_DEFAULT_CIPHERS #define LISTEN_DEFAULT_CIPHERS NULL #endif /* named curve used as defaults for ECDHE ciphers */ #ifndef ECDHE_DEFAULT_CURVE #define ECDHE_DEFAULT_CURVE "prime256v1" #endif /* ssl cache size */ #ifndef SSLCACHESIZE #define SSLCACHESIZE 20000 #endif /* ssl max dh param size */ #ifndef SSL_DEFAULT_DH_PARAM #define SSL_DEFAULT_DH_PARAM 0 #endif /* max memory cost per SSL session */ #ifndef SSL_SESSION_MAX_COST #define SSL_SESSION_MAX_COST (16*1024) // measured #endif /* max memory cost per SSL handshake (on top of session) */ #ifndef SSL_HANDSHAKE_MAX_COST #define SSL_HANDSHAKE_MAX_COST (76*1024) // measured #endif #ifndef DEFAULT_SSL_CTX_CACHE #define DEFAULT_SSL_CTX_CACHE 1000 #endif /* approximate stream size (for maxconn estimate) */ #ifndef STREAM_MAX_COST #define STREAM_MAX_COST (sizeof(struct stream) + \ 2 * sizeof(struct channel) + \ 2 * sizeof(struct connection) + \ REQURI_LEN + \ 2 * global.tune.cookie_len) #endif /* available memory estimate : count about 3% of overhead in various structures */ #ifndef MEM_USABLE_RATIO #define MEM_USABLE_RATIO 0.97 #endif /* Number of samples used to compute the times reported in stats. A power of * two is highly recommended, and this value multiplied by the largest response * time must not overflow and unsigned int. See freq_ctr.h for more information. * We consider that values are accurate to 95% with two batches of samples below, * so in order to advertise accurate times across 1k samples, we effectively * measure over 512. */ #ifndef TIME_STATS_SAMPLES #define TIME_STATS_SAMPLES 512 #endif /* max ocsp cert id asn1 encoded length */ #ifndef OCSP_MAX_CERTID_ASN1_LENGTH #define OCSP_MAX_CERTID_ASN1_LENGTH 128 #endif #ifndef OCSP_MAX_RESPONSE_TIME_SKEW #define OCSP_MAX_RESPONSE_TIME_SKEW 300 #endif /* Number of TLS tickets to check, used for rotation */ #ifndef TLS_TICKETS_NO #define TLS_TICKETS_NO 3 #endif /* pattern lookup default cache size, in number of entries : * 10k entries at 10k req/s mean 1% risk of a collision after 60 years, that's * already much less than the memory's reliability in most machines and more * durable than most admin's life expectancy. A collision will result in a * valid result to be returned for a different entry from the same list. */ #ifndef DEFAULT_PAT_LRU_SIZE #define DEFAULT_PAT_LRU_SIZE 10000 #endif #endif /* _COMMON_DEFAULTS_H */