Closed navjeetc closed 7 years ago
Here is script for the unicorn service
#!/bin/bash
### BEGIN INIT INFO
# Provides: unicorn
# Required-Start: $remote_fs $syslog
# Required-Stop: $remote_fs $syslog
# Default-Start: 2 3 4 5
# Default-Stop: 0 1 6
# Short-Description: Manage unicorn server
# Description: Start, stop, restart unicorn server for a specific application.
### END INIT INFO
set -e
# Feel free to change any of the following variables for your app:
TIMEOUT=${TIMEOUT-60}
APP_ROOT=/home/rails/fsi/current
PID=/home/rails/fsi/shared/tmp/pids/unicorn.pid
AS_USER=rails
CMD="export HOME; true "${HOME:=$(getent passwd "$AS_USER" | cut -d: -f6;)}" ; cd $APP_ROOT && ( RAILS_RELATIVE_URL_ROOT=/fsi /usr/local/rvm/bin/rvm default do bundle exec unicorn -D -c /home/rails/fsi/shared/config/unicorn.rb -E production )"
set -u
OLD_PIN="$PID.oldbin"
sig () {
test -s "$PID" && kill -$1 `cat $PID`
}
oldsig () {
test -s $OLD_PIN && kill -$1 `cat $OLD_PIN`
}
run () {
if [ "$(id -un)" = "$AS_USER" ]; then
eval $1
else
su -c "$1" - $AS_USER
fi
}
case "$1" in
start)
sig 0 && echo >&2 "Already running" && exit 0
run "$CMD"
;;
stop)
sig QUIT && exit 0
echo >&2 "Not running"
;;
force-stop)
sig TERM && exit 0
echo >&2 "Not running"
;;
restart|reload)
sig USR2 && echo reloaded OK && exit 0
echo >&2 "Couldn't reload, starting '$CMD' instead"
run "$CMD"
;;
upgrade)
if sig USR2 && sleep 2 && sig 0 && oldsig QUIT
then
n=$TIMEOUT
while test -s $OLD_PIN && test $n -ge 0
do
printf '.' && sleep 1 && n=$(( $n - 1 ))
done
echo
if test $n -lt 0 && test -s $OLD_PIN
then
echo >&2 "$OLD_PIN still exists after $TIMEOUT seconds"
exit 1
fi
exit 0
fi
echo >&2 "Couldn't upgrade, starting '$CMD' instead"
run "$CMD"
;;
reopen-logs)
sig USR1
;;
*)
echo >&2 "Usage: $0 <start|stop|restart|upgrade|force-stop|reopen-logs>"
exit 1
;;
esac
restart should be sending the HUP signal?
according to the docs a USR2 signal will need a QUIT signal to the old process. That is why you see the upgrade
option in that script.
https://github.com/defunkt/unicorn/blob/master/Documentation/unicorn.1.txt#L115
@rhomeister It seems the init script isn't correct in sending a USR2 signal for restart. Needs HUP or the upgrade options.
https://github.com/defunkt/unicorn/blob/master/examples/init.sh#L42
I fixed the problem in my server. See the explanation about the signals in the pull-request https://github.com/capistrano-plugins/capistrano-unicorn-nginx/pull/93. Until it gets merged you can use my fork.
This is merged now.
After capistrano deployment the old unicorn process seems to be kept around. When I do ps the old process is listed as "master (old)". Is that normal?