Pull request to allow supervisor to send arbitrary signals to processes

https://github.com/Supervisor/supervisor/pull/477

Let’s you do stuff like:

$ supervisorctl
cat:0                            RUNNING   pid 57305, uptime 0:00:07
cat:1                            RUNNING   pid 57304, uptime 0:00:07
cat:2                            RUNNING   pid 57307, uptime 0:00:07
cat:3                            RUNNING   pid 57306, uptime 0:00:07
cat:4                            RUNNING   pid 57308, uptime 0:00:07
dog:0                            RUNNING   pid 57300, uptime 0:00:07
dog:1                            RUNNING   pid 57299, uptime 0:00:07
dog:2                            RUNNING   pid 57302, uptime 0:00:07
dog:3                            RUNNING   pid 57301, uptime 0:00:07
dog:4                            RUNNING   pid 57303, uptime 0:00:07
supervisor> help signal
signal <signal name> <name>	      Signal a process
signal <signal name> <gname>:*        Signal all processes in a group
signal <signal name> <name> <name>    Signal multiple processes or groups
supervisor> signal 1 dog:3 dog:4
dog:3: signalled
dog:4: signalled
supervisor> signal HUP dog:3 dog:4
dog:3: signalled
dog:4: signalled
supervisor> signal HUP dog:*
dog:1: signalled
dog:0: signalled
dog:3: signalled
dog:2: signalled
dog:4: signalled
supervisor> signal USR1 dog:1 dog:2
dog:1: signalled
dog:2: signalled

Also, if you can’t wait for supervisor to support this, the mr.laforge package supplies a supervisor plugin that can be used to send signals to processes:

$ supervisorctl kill HUP nginx

That said, it would be nice to have this built into supervisor…

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