gracefully reload php-fpm

reload-php-fpm.sh

#!/bin/bash
SED=/bin/sed

NGINX_INIT="/etc/init.d/nginx"
NGINX_CONF="/usr/local/nginx/conf/nginx.conf"

FPM_1="/etc/init.d/php-fpm"
FASTCGI_1="php-fpm.socket"
FASTCGI_1_PID="/var/run/php-fpm.pid"

FPM_2="/etc/init.d/php-fpm2"
FASTCGI_2="php-fpm2.socket"
FASTCGI_2_PID="/var/run/php-fpm2.pid"

function check_file {
    if [[ ! -f $1 ]]; then
        echo "$1 does not exists."
        exit -1
    fi
}

function start_php_fpm {
    if [[ -f $1 ]]
    then
        echo "$2 stop"
        $2 stop
        sleep 1
    fi
    echo "$2 start"
    $2 start
}

function use_php_fpm {
    echo "$1 reload"
    $1 reload
    sleep 5
    echo "$2 stop"
    $2 stop
}

check_file $FPM_1
check_file $FPM_2

if [[ `grep ${FASTCGI_1} $NGINX_CONF` != '' ]]
then
    $SED -i "s/${FASTCGI_1}/${FASTCGI_2}/g" $NGINX_CONF
    start_php_fpm $FASTCGI_2_PID $FPM_2
    sleep 1
    use_php_fpm $NGINX_INIT $FPM_1
else
    $SED -i "s/${FASTCGI_2}/${FASTCGI_1}/g" $NGINX_CONF
    start_php_fpm $FASTCGI_1_PID $FPM_1
    sleep 1
    use_php_fpm $NGINX_INIT $FPM_2
fi