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63 lines
1.5 KiB
63 lines
1.5 KiB
5 months ago
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Reloading HAProxy without impacting server states
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=================================================
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Of course, to fully understand below information please consult
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doc/configuration.txt to understand how each HAProxy directive works.
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In the mean line, we update HAProxy's configuration to tell it where to
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retrieve the last know trustable servers state.
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Then, before reloading HAProxy, we simply dump servers state from running
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process into the locations we pointed into the configuration.
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And voilà :)
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Using one file for all backends
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-------------------------------
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HAProxy configuration
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*********************
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global
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[...]
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stats socket /var/run/haproxy/socket
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server-state-file global
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server-state-base /var/state/haproxy/
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defaults
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[...]
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load-server-state-from-file global
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HAProxy init script
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*******************
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Run the following command BEFORE reloading:
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socat /var/run/haproxy/socket - <<< "show servers state" > /var/state/haproxy/global
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Using one state file per backend
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--------------------------------
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HAProxy configuration
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*********************
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global
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[...]
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stats socket /var/run/haproxy/socket
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server-state-base /var/state/haproxy/
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defaults
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[...]
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load-server-state-from-file local
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HAProxy init script
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*******************
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Run the following command BEFORE reloading:
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for b in $(socat /var/run/haproxy/socket - <<< "show backend" | fgrep -v '#')
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do
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socat /var/run/haproxy/socket - <<< "show servers state $b" > /var/state/haproxy/$b
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done
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