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MEDIUM: stats: define stats-file keyword

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This commit is the final to implement preloading of haproxy internal
counters via stats-file parsing.

Define a global keyword "stats-file". It allows to specify the path to
the stats-file which will be parsed on process startup.
This commit is contained in:
Amaury Denoyelle 2024-04-24 11:10:07 +02:00
parent 782be288ca
commit e4a29447ce
2 changed files with 22 additions and 0 deletions
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6
doc/configuration.txt
View File

@ -1318,6 +1318,7 @@ The following keywords are supported in the "global" section :
- ssl-server-verify
- ssl-skip-self-issued-ca
- stats
- stats-file
- strict-limits
- uid
- ulimit-n
@ -2661,6 +2662,11 @@ stats timeout <timeout, in milliseconds>
to change this value with "stats timeout". The value must be passed in
milliseconds, or be suffixed by a time unit among { us, ms, s, m, h, d }.
stats-file <path>
Path to a generated haproxy stats-file. On startup haproxy will preload the
values to its internal counters. Use the CLI command "dump stats-file" to
produce such stats-file. See the management manual for more details.
strict-limits
Makes process fail at startup when a setrlimit fails. HAProxy tries to set the
best setrlimit according to what has been calculated. If it fails, it will

16
src/cfgparse-global.c
View File

@ -52,6 +52,7 @@ static const char *common_kw_list[] = {
"presetenv", "unsetenv", "resetenv", "strict-limits", "localpeer",
"numa-cpu-mapping", "defaults", "listen", "frontend", "backend",
"peers", "resolvers", "cluster-secret", "no-quic", "limited-quic",
"stats-file",
NULL /* must be last */
};
@ -1031,6 +1032,21 @@ int cfg_parse_global(const char *file, int linenum, char **args, int kwm)
global.server_state_file = strdup(args[1]);
}
else if (strcmp(args[0], "stats-file") == 0) { /* path to the file where HAProxy can load the server states */
if (global.stats_file != NULL) {
ha_alert("parsing [%s:%d] : '%s' already specified. Continuing.\n", file, linenum, args[0]);
err_code |= ERR_ALERT;
goto out;
}
if (!*(args[1])) {
ha_alert("parsing [%s:%d] : '%s' expect one argument: a file path.\n", file, linenum, args[0]);
err_code |= ERR_FATAL;
goto out;
}
global.stats_file = strdup(args[1]);
}
else if (strcmp(args[0], "log-tag") == 0) { /* tag to report to syslog */
if (alertif_too_many_args(1, file, linenum, args, &err_code))
goto out;