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Feature request #1678: script/deploy: rewrite "restart" task to use USR2 signal

Kind	feature request
Product	wincent.dev
When	Created 2010-09-01T20:31:39Z, updated 2010-09-11T11:17:36Z
Status	open
Reporter	Greg Hurrell
Tags	no tags

Description

Currently our restart subcommand is just a stop followed by a start.

Try for zero downtime deployments by adding a new restart task which does some USR2 signal magic to make Unicorn gracefully reload itself and the application without dropping existing connections.

Plenty of references to it out on the web, so hopefully shouldn't be too hard to do:

http://pastie.org/1129610 (based on GitHub example; incidentally, this also has an example of how to do per-worker PID files that can be monitored by Monit)
http://gist.github.com/559710 (Vlad example)

Comments

Greg Hurrell 2010-09-11T11:16:53Z
Summary changed:
- From: Add "restart" task to script/deploy
- To: script/deploy: rewrite "restart" task to use USR2 signal

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Feature request #1678: script/deploy: rewrite "restart" task to use USR2 signal

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