Mercurial > hg > nginx
annotate src/core/ngx_syslog.h @ 9225:1c9264603adc
Syslog: introduced ngx_syslog_send() error logging moderation.
Errors when logging to syslog are now logged at most once per second.
This ensures that persistent errors won't flood other logs, and spontaneous
errors, such as ENOBUFS as observed on BSD systems when syslogd cannot cope
with load, or EAGAIN as seen in similar situation on Linux, won't further
overload logging subsystem, leading to more errors.
Further, errors now can only trigger reconnects at most once per second.
This ensures that persistent errors, which cannot be fixed with reconnects,
don't trigger too much unneeded work.
Additionally, in case of connection errors, such as when syslogd is not
running, connection attempts are only made once per second.
author | Maxim Dounin <mdounin@mdounin.ru> |
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date | Fri, 01 Mar 2024 05:42:12 +0300 |
parents | 8771d35d55d0 |
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5702
777202558122
Added syslog support for error_log and access_log directives.
Vladimir Homutov <vl@nginx.com>
parents:
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1 |
777202558122
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2 /* |
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3 * Copyright (C) Nginx, Inc. |
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4 */ |
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5 |
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6 |
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7 #ifndef _NGX_SYSLOG_H_INCLUDED_ |
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8 #define _NGX_SYSLOG_H_INCLUDED_ |
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9 |
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10 |
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11 typedef struct { |
8149
29adacffdefa
Syslog: removed usage of ngx_cycle->log and ngx_cycle->hostname.
Maxim Dounin <mdounin@mdounin.ru>
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12 ngx_uint_t facility; |
29adacffdefa
Syslog: removed usage of ngx_cycle->log and ngx_cycle->hostname.
Maxim Dounin <mdounin@mdounin.ru>
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13 ngx_uint_t severity; |
29adacffdefa
Syslog: removed usage of ngx_cycle->log and ngx_cycle->hostname.
Maxim Dounin <mdounin@mdounin.ru>
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14 ngx_str_t tag; |
29adacffdefa
Syslog: removed usage of ngx_cycle->log and ngx_cycle->hostname.
Maxim Dounin <mdounin@mdounin.ru>
parents:
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15 |
29adacffdefa
Syslog: removed usage of ngx_cycle->log and ngx_cycle->hostname.
Maxim Dounin <mdounin@mdounin.ru>
parents:
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16 ngx_str_t *hostname; |
5702
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17 |
8149
29adacffdefa
Syslog: removed usage of ngx_cycle->log and ngx_cycle->hostname.
Maxim Dounin <mdounin@mdounin.ru>
parents:
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18 ngx_addr_t server; |
29adacffdefa
Syslog: removed usage of ngx_cycle->log and ngx_cycle->hostname.
Maxim Dounin <mdounin@mdounin.ru>
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19 ngx_connection_t conn; |
29adacffdefa
Syslog: removed usage of ngx_cycle->log and ngx_cycle->hostname.
Maxim Dounin <mdounin@mdounin.ru>
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20 |
8150
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Syslog: introduced error log handler.
Maxim Dounin <mdounin@mdounin.ru>
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21 ngx_log_t log; |
8771d35d55d0
Syslog: introduced error log handler.
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22 ngx_log_t *logp; |
8149
29adacffdefa
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Maxim Dounin <mdounin@mdounin.ru>
parents:
7277
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23 |
9225
1c9264603adc
Syslog: introduced ngx_syslog_send() error logging moderation.
Maxim Dounin <mdounin@mdounin.ru>
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8150
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24 time_t error_log_time; |
1c9264603adc
Syslog: introduced ngx_syslog_send() error logging moderation.
Maxim Dounin <mdounin@mdounin.ru>
parents:
8150
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25 time_t connect_error_time; |
1c9264603adc
Syslog: introduced ngx_syslog_send() error logging moderation.
Maxim Dounin <mdounin@mdounin.ru>
parents:
8150
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26 |
8149
29adacffdefa
Syslog: removed usage of ngx_cycle->log and ngx_cycle->hostname.
Maxim Dounin <mdounin@mdounin.ru>
parents:
7277
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27 unsigned busy:1; |
29adacffdefa
Syslog: removed usage of ngx_cycle->log and ngx_cycle->hostname.
Maxim Dounin <mdounin@mdounin.ru>
parents:
7277
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28 unsigned nohostname:1; |
5702
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29 } ngx_syslog_peer_t; |
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30 |
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Added syslog support for error_log and access_log directives.
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31 |
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Added syslog support for error_log and access_log directives.
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32 char *ngx_syslog_process_conf(ngx_conf_t *cf, ngx_syslog_peer_t *peer); |
777202558122
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33 u_char *ngx_syslog_add_header(ngx_syslog_peer_t *peer, u_char *buf); |
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34 void ngx_syslog_writer(ngx_log_t *log, ngx_uint_t level, u_char *buf, |
777202558122
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35 size_t len); |
777202558122
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36 ssize_t ngx_syslog_send(ngx_syslog_peer_t *peer, u_char *buf, size_t len); |
777202558122
Added syslog support for error_log and access_log directives.
Vladimir Homutov <vl@nginx.com>
parents:
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changeset
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37 |
777202558122
Added syslog support for error_log and access_log directives.
Vladimir Homutov <vl@nginx.com>
parents:
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38 |
777202558122
Added syslog support for error_log and access_log directives.
Vladimir Homutov <vl@nginx.com>
parents:
diff
changeset
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39 #endif /* _NGX_SYSLOG_H_INCLUDED_ */ |