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hashbrowncipher/even less downtime haproxy reloads

Last active October 2, 2015 20:12
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even less downtime haproxy reloads
0. compile haproxy with patch: https://gist.github.com/hashbrowncipher/a0da32514f2f240cbbbf
1. start up new haproxy
2. haproxy becomes ready -> exits (after forking)
3. plug SYNs
4. send SIGUSR1 to old haproxy
5. flock(/var/run/synapse/haproxy_pids/PID.lock, LOCK_EX) -> blocks a bit
6. unplug SYNs
@jolynch
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jolynch commented Oct 2, 2015

This is really cool, let's make your patch an option and get it upstreamed.

Also in the meantime we can apply to our internal 1.5 branch.

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