Nginxの入れ替えスクリプト

本編 http://d.hatena.ne.jp/m-hiyama/20120309/1331263930 で参照した http://webdevrefinery.com/forums/topic/8348-nginx-update-script/ にるシェルスクリプトを写しておく。

#!/bin/sh
VERSION=0.0.1

echo ""
echo "########################################################"
echo "#             nginx updater  (c) NSPwn.com             #"
echo "########################################################"
echo "# Author: GreySyntax                                   #"
echo "# Version: $VERSION                                    #"
echo "########################################################"
echo ""

PID=`cat /var/run/nginx.pid`

echo "Ensure you have ran 'make install clean' before continuing"
echo "Are you sure you wish to update nginx? [y/n] ($PID)"
read update_ok

if [ $update_ok == "y" ]
then
        kill -USR2 $PID
        echo "Disable old workers? [y/n]"
        read disable_workers

        if [ $disable_workers == "y" ]
        then
                kill -WINCH $PID
                echo "Kill old master [1] or restart old workers [2]?"
                read master_workers

                if [ $master_workers == "1" ]
                then
                        echo "Killing old master (this may take some time)"
                        kill -QUIT $PID
                        exit 0
                else
                        echo "Restarting old workers"
                        PID_NEW=`cat /var/run/nginx.pid`
                        kill -HUP $PID
                        echo "Shutting down new master process ($PID_NEW)"
                        kill -QUIT $PID_NEW
                        kill -TERM $PID_NEW
                fi      
        else
                echo "Restarting old workers"
                PID_NEW=`cat /var/run/nginx.pid`
                kill -HUP $PID
                echo "Shutting down new master process ($PID_NEW)"
                kill -QUIT $PID_NEW
                kill -TERM $PID_NEW
        fi
else
        exit -1
fi

[追記]

これも本編に書いたけど、最近のMakefileで次のターゲットがある。簡単。

upgrade:

        /usr/local/nginx/sbin/nginx -t
        kill -USR2 `cat /usr/local/nginx/logs/nginx.pid`

        sleep 1

        test -f /usr/local/nginx/logs/nginx.pid.oldbin
        kill -QUIT `cat /usr/local/nginx/logs/nginx.pid.oldbin`

[/追記]