75 lines
1.6 KiB
Bash
Executable File
75 lines
1.6 KiB
Bash
Executable File
#!/bin/bash
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# This is a helper script you can use to supervise unicorn, it allows you to perform a live restart
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# by sending it a USR2 signal
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LOCAL_WEB="http://127.0.0.1:3000/"
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function log()
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{
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echo "($$) $1"
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}
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function on_exit()
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{
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kill $UNICORN_PID
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log "exiting"
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}
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function on_reload()
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{
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log "Stopping Sidekiq"
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kill -s TSTP $UNICORN_PID
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log "Reloading unicorn ($UNICORN_PID)"
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kill -s USR2 $UNICORN_PID
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unset NEW_UNICORN_PID
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count=0
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while [ "$count" -lt 180 -a -z "$NEW_UNICORN_PID" ]; do
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NEW_UNICORN_PID=`ps -f --ppid $UNICORN_PID | grep 'unicorn master' | grep -v old | grep -v worker | awk '{ print $2 }'`
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log "Waiting for new unicorn master pid... $NEW_UNICORN_PID"
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count=$((count+1))
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sleep 1
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done
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if [ -n "$NEW_UNICORN_PID" ]; then
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count=0
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while [ "$count" -lt 180 -a -z "$(ps -f --ppid $NEW_UNICORN_PID | grep worker | head -1 | awk '{ print $2 }')" ]; do
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log "Waiting for new unicorn workers under $NEW_UNICORN_PID to start up..."
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count=$((count+1))
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sleep 1
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done
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curl $LOCAL_WEB &> /dev/null
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kill -s QUIT $UNICORN_PID
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log "Old pid is: $UNICORN_PID New pid is: $NEW_UNICORN_PID"
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UNICORN_PID=$NEW_UNICORN_PID
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else
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log "Unicorn is taking too long to reload...Sending TERM to $UNICORN_PID"
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kill -s TERM $UNICORN_PID
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fi
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}
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function on_reopenlogs()
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{
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log "Reopening logs"
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kill -s USR1 $UNICORN_PID
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}
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export UNICORN_SUPERVISOR_PID=$$
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trap on_exit EXIT
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trap on_reload USR2 HUP
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trap on_reopenlogs USR1
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unicorn $@ &
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UNICORN_PID=$!
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echo "supervisor pid: $UNICORN_SUPERVISOR_PID unicorn pid: $UNICORN_PID"
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while kill -0 $UNICORN_PID
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do
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sleep 1
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done
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