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@mkempe mkempe/my_app.conf
Created Sep 25, 2014

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RVM, Wrapper, Unicorn, Init.d
NAME="My App"
APP_PATH="/var/apps/my_app/current"
UNICORN="/usr/local/rvm/wrappers/my_app/unicorn_rails"
ENVIRONMENT="production"
#!/usr/bin/env bash
### BEGIN INIT INFO
# Provides: unicorn
# Required-Start: $all
# Required-Stop: $network $local_fs $syslog
# Default-Start: 2 3 4 5
# Default-Stop: 0 1 6
# Short-Description: Start the unicorns at boot
# Description: Enable at boot time.
### END INIT INFO
# This is unicorn init.d script for single or multiple unicorn installations.
#
# Expects at least one configuration (*.conf) in `/etc/unicorn`.
#
# A sample configuration (`/etc/unicorn/my_app.conf`):
#
# NAME="My App"
# APP_PATH="/var/apps/my_app/current"
# UNICORN="/usr/local/rvm/wrappers/my_app/unicorn_rails"
# ENVIRONMENT="production"
#
# This configures an Unicorn master for your app at `/var/apps/my_app/current`
# running in production mode. It will read `config/unicorn/<ENVIRONMENT>.rb` for
# further set up.
#
# To get the Unicorn script run:
#
# $ <rvmsudo> rvm alias create <WRAPPER_NAME> <RUBY>@<GEMSET>
# $ rvm wrapper <WRAPPER_NAME> --no-links unicorn_rails
#
# This way it will allow changing the alias when a new uby is used without
# changing anything else.
#
# You should ensure different ports or sockets are set if you are running more
# than one master concurrently.
#
# If you call this script without any config parameters, it will attempt to run
# the init command for all your unicorn configurations listed in `/etc/unicorn/*.conf`.
#
# $ /etc/init.d/unicorn start # Starts all Unicorns
#
# If you specify a particular config, it will only operate on that one.
#
# $ /etc/init.d/unicorn start <APP_NAME>
__sig() {
typeset __pid
[[ -s "$2" ]] && __pid="$(cat "$2")" && [[ -n "${__pid}" ]] && kill -$1 "${__pid}" >/dev/null 2>&1 || return $?
}
sig() {
__sig "$1" "$PID" || return $?
}
oldsig() {
__sig "$1" "$OLD_PID" || return $?
}
run() {
echo -n "$1 - "
shift
if
"$@"
then
echo "OK"
else
typeset result=$?
echo "Failed!" >&2
return $result
fi
}
prefix_command_with_su_fix_quoting() {
typeset -a __temp
__temp=()
while
(( $# ))
do
__temp+=( "'$1'" )
shift
done
CMD=( su - "${__owner}" -c "cd '$APP_PATH' && ${__temp[*]}" )
}
setup () {
echo "$NAME:"
cd $APP_PATH || return $?
# export RACK_ENV="${ENVIRONMENT}"
# export RAILS_ENV="${ENVIRONMENT}"
export PID="$APP_PATH/tmp/pids/unicorn.pid"
export OLD_PID="$PID.oldbin"
CMD=( "$UNICORN" -c "${APP_PATH}/config/unicorn/${ENVIRONMENT}.rb" -E "${ENVIRONMENT}" -D )
typeset __owner="$(stat -c "%U" "${APP_PATH}")"
if
[[ "${USER:=$(whoami)}" == "${__owner}" ]]
then
true # It's all fine we run as owner of the app
elif
(( UID == 0 ))
then
prefix_command_with_su_fix_quoting "${CMD[@]}"
else
echo "ERROR: running not as owner(${__owner}) of '$APP_PATH' and not as root($USER), prefix with 'sudo' and try again!"
return 2
fi
}
cmd_start() {
if sig 0
then echo "Already started"
else run "Starting" "${CMD[@]}" || return $?
fi
}
wait_pid_kill() {
typeset __count=$1
while
(( __count > 0 )) &&
sig 0
do
: $(( __count-- ))
sleep 1s
done
sig 0 || return $?
}
cmd_stop() {
run "Stopping" sig QUIT
if
wait_pid_kill 5
then
run "Force stop" sig TERM
if wait_pid_kill 3
then return 1
fi
fi
}
cmd_restart() {
cmd_stop && cmd_start || return $?
}
cmd_reload() {
run "Reloading" sig USR2 && wait_pid_kill 5 && oldsig QUIT || oldsig TERM || cmd_restart || return $?
}
cmd_rotate() {
run "Rotate" sig USR1 || cmd_start || return $?
}
cmd() {
setup || return $?
case "$1" in
start|stop|restart|reload|rotate)
cmd_$1 || return $?
;;
upgrade)
cmd_reload || return $?
;;
*)
echo "Usage: $0 <start|stop|restart|reload|upgrade|rotate>" >&2
return 1
;;
esac
}
# Either run the start, stop, reload, etc. command for every config under
# `/etc/unicorn` or just do it for a specific one.
# $1 contains the command
# $2 if it exists, should be the specific config we want to act on
start_stop () {
if
[[ -n "$2" ]]
then
. "/etc/unicorn/$2.conf" || return $?
cmd "$1" || return $?
else
for CONFIG in /etc/unicorn/*.conf
do
. "$CONFIG" || return $?
cmd "$1" || return $?
done
fi
}
start_stop "$@"
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