我们知道，nginx的reload是不会影响服务的，php-fpm也有reload 功能，而且确实不是restart，但是却是影响服务的，下面给出一种改进方式，是的php-fpm的reload不影响服务
修改源代码：
重写init脚本：
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#! /bin/sh ### BEGIN INIT INFO # Provides: php-fpm # Required-Start: $remote_fs $network # Required-Stop: $remote_fs $network # Default-Start: 2 3 4 5 # Default-Stop: 0 1 6 # Short-Description: starts php-fpm # Description: starts the PHP FastCGI Process Manager daemon ### END INIT INFO php_fpm_BIN=/usr/sbin/php-fpm php_fpm_CONF=/etc/php/php-fpm.conf php_fpm_PID=/var/run/php-fpm.pid tmp_pid=/var/run/php-fpm.tmp.pid php_opts="--fpm-config $php_fpm_CONF --pid $tmp_pid" wait_for_pid () { local pid=$1 while kill -0 $pid >/dev/null 2>&1 ; do sleep 1; done } case "$1" in start) echo -n "Starting php-fpm " $php_fpm_BIN --daemonize $php_opts if [ "$?" != 0 ] ; then echo " failed" exit 1 fi cat $tmp_pid >$php_fpm_PID echo " done" ;; stop) echo -n "Gracefully shutting down php-fpm " if [ ! -r $php_fpm_PID ] ; then echo "warning, no pid file found - php-fpm is not running ?" exit 1 fi pid=$(cat $php_fpm_PID) kill -QUIT $pid wait_for_pid $pid echo " done" ;; status) if [ ! -r $php_fpm_PID ] ; then echo "php-fpm is stopped" exit 0 fi PID=`cat $php_fpm_PID` if ps -p $PID | grep -q $PID; then echo "php-fpm (pid $PID) is running..." else echo "php-fpm dead but pid file exists" fi ;; force-quit) echo -n "Terminating php-fpm " if [ ! -r $php_fpm_PID ] ; then echo "warning, no pid file found - php-fpm is not running ?" exit 1 fi pid=$(cat $php_fpm_PID) kill -TERM $pid wait_for_pid $pid echo " done" ;; restart) $0 stop $0 start ;; reload) echo -n "Reload service php-fpm " if [ ! -r $php_fpm_PID ] ; then echo "warning, no pid file found - php-fpm is not running ?" exit 1 fi pid=$(cat $php_fpm_PID) error=$($0 start >/dev/null) [[ "$error" != "" ]] && echo $error && exit 1 kill -QUIT $pid # 这里等待该pid似乎也不太好 echo " done" ;; configtest) $php_fpm_BIN -t ;; *) echo "Usage: $0 {start|stop|force-quit|restart|reload|status|configtest}" exit 1 ;; esac |
注意：
- 该功能要求linux内核版本较高，需要支持socket的SO_REUSEPORT 特性，我的3.10的内核已经支持了
- php-fpm 的pid文件是php-fpm进程来维护的，同时启动多个php-fpm不太方便，所以需要玩一些手段；虽然不指定pid文件参数也可以，但是我不知道如何才能方便地拿到php-fpm的pid信息，所以还是指定了pid参数