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DOC: configuration: more details about the master-worker mode

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Add more details about the master-worker mode in the "master-worker"
global keyword.

Should fix issue #2198.
This commit is contained in:
William Lallemand 2024-07-02 18:23:34 +02:00
parent e5e36ce097
commit 419b79492a
1 changed files with 12 additions and 4 deletions
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16
doc/configuration.txt
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@ -2140,10 +2140,18 @@ lua-prepend-path <string> [<type>]
master-worker [no-exit-on-failure]
Master-worker mode. It is equivalent to the command line "-W" argument.
This mode will launch a "master" which will monitor the "workers". Using
this mode, you can reload HAProxy directly by sending a SIGUSR2 signal to
the master. The master-worker mode is compatible either with the foreground
or daemon mode.
This mode will launch a "master" which will fork a "worker" after reading the
configuration to process the traffic. The master is used as a process manager
which will monitor the "workers".
Using this mode, you can reload HAProxy directly by sending a SIGUSR2 signal
to the master. Reloading will ask the master to read the configuration again
and fork a new worker. The previous worker will be kept until the end of its
jobs.
The master-worker mode is compatible either with the foreground or daemon
mode.
By default, if a worker exits with a bad return code, in the case of a
segfault for example, all workers will be killed, and the master will leave.