68 lines
1.6 KiB
Bash
68 lines
1.6 KiB
Bash
#!/bin/bash
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#
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# This script is similar to minion but will do a few additional things:
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# - PHP process is run in the background
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# - PHP process is monitored and restarted if it exits for any reason
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# - Added handlers for SUGHUP, SIGINT, and SIGTERM
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#
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# This is meant for long running minion tasks (like background workers).
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# Shutting down the minion tasks is done by sending a SIGINT or SIGTERM signal
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# to this miniond process. You can also restart the minion task by sending a
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# SUGHUP signal to this process. It's useful to restart all your workers when
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# deploying new code so that the workers reload their code as well.
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# You cannot use this script for tasks that require user input because of the
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# PHP process running in the background.
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#
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# Usage: ./miniond [task:name] [--option1=optval1 --option2=optval2]
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#
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# And so on.
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#
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# Define some functions
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function start_daemon()
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{
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echo "Starting"
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./minion $ARGS & # This assumes miniond is sitting next to minion
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pid=$! # Store pid (globally) for later use..
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}
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function stop_daemon()
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{
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kill -TERM $pid
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wait $pid # Wait for the task to exit and store the exit code
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ecode=$? # Store exit code (globally) for later use..
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}
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function handle_SIGHUP()
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{
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echo "Restarting"
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stop_daemon
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start_daemon
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}
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function handle_SIGTERM_SIGINT()
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{
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echo "Shutting Down"
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stop_daemon
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exit $ecode
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}
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# Register signal handlers
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trap handle_SIGHUP SIGHUP
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trap handle_SIGTERM_SIGINT SIGTERM SIGINT
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ARGS=$@
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start_daemon
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while :
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do
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# Pauses the script until $pid is dead
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wait $pid
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# Make sure someone didn't start it back up already (SIGHUP handler does this)
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if ! kill -0 $pid > /dev/null 2>&1
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then
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start_daemon
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fi
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done |