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mingshun/gist:713fef40577654b70db7

Created June 21, 2014 07:25
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upgrade nginx without downtime
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gistfile1.txt
kill -USR2 [old master process]
kill -WINCH [old master process]
# After all old workers quit, shut down the old master process if it is unused any more.
kill -TERM [old master process]
# Revert to the old nginx while the old master was not shutted down.
kill -HUP [old master process]
kill -QUIT [new master process]
kill -TERM [new master process]
# If there is anything wrong while shutting down the new workers, just kill them.
kill -KILL [new worker process]
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