centos中设置服务自动启动

浅浅的花香味﹌ 2022-06-05 05:51 307阅读 0赞

centos6很centos7中有些不同，centos7中用systemctl命令（系统服务管理器指令）将centos6中的 service 和 开机启动命令chkconfig 这两个命令组合到一起。  
在centos7中进行设置（以用yum安装的nginx为例）：

systemctl start nginx.service          启动nginx
    systemctl status nginx.service         查看nginx状态
    systemctl enable nginx.service         设置nginx开机自动启动
    systemctl is-enabled nginx.service     查看nginx是否是开机自动启动

可以看到在centos7中设置自动启动还是很方便的，也可以在rc.local中设置启动命令（以tomcat为例）：

/usr/local/tomcat/bin/startup.sh                  设置绝对路径就可以
    export JAVA_HOME=/usr/share/jdk
    su - cs -c '/usr/local/tomcat/bin/startup.sh'     如果不想用root启动也可以转到普通用户，cs是用户

但我有次设置nginx开机自动启动的时候，发现nginx虽然起来了，但是不是根据etc下的配置文件启动的，后来才知道是linux中的selinux在作怪，可以在selinux中使用放行命令，也可以关掉selinux。

centos6中呢，则需要创建启动脚本，然后放到init.d中并设置开机自动启动，如：

amoeba的启动脚本：

#!/bin/sh
    # chkconfig: 12345 62 62
    # description: amoeba 3.05 AutoRun Servimces
    # /etc/init.d/amoeba
    #
    # Run-level Startup script for the Oracle Instance, Listener, and
    # Web Interface
    export JAVA_HOME=/usr/loacl/jdk
    export PATH=$JAVA_HOME/bin:$JAVA_HOME/jre/bin:$PATH
    PATH=/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin
    NAME=Amoeba
    AMOEBA_BIN=/usr/local/amoeba/bin/start
    SHUTDOWN_BIN=/usr/local/amoeba/bin/stop
    PIDFILE=/root/amoeba/Amoeba-MySQL.pid
    SCRIPTNAME=/etc/init.d/amoeba
    
    case "$1" in
    start)
    echo -n "Starting $NAME... "
    $AMOEBA_BIN
    echo " done"
    ;;
    
    stop)
    echo -n "Stoping $NAME... "
    $SHUTDOWN_BIN
    echo " done"
    ;;
    
    restart)
    $SHUTDOWN_BIN
    sleep 1
    $AMOEBA_BIN
    ;;
    *)
    echo "Usage: $SCRIPTNAME {start|stop|restart}"
    exit 1
    ;;
    
    esac

nginx的启动脚本：

#!/bin/sh
    #
    # nginx - this script starts and stops the nginx daemon
    #
    # chkconfig: - 85 15
    # description: Nginx is an HTTP(S) server, HTTP(S) reverse \
    # proxy and IMAP/POP3 proxy server
    # processname: nginx
    # config: /etc/nginx/nginx.conf
    # config: /etc/sysconfig/nginx
    # pidfile: /var/run/nginx.pid
    
    # Source function library.
    . /etc/rc.d/init.d/functions
    
    # Source networking configuration.
    . /etc/sysconfig/network
    
    # Check that networking is up.
    [ "$NETWORKING" = "no" ] && exit 0
    
    nginx="/usr/sbin/nginx"
    prog=$(basename $nginx)
    
    sysconfig="/etc/sysconfig/$prog"
    lockfile="/var/lock/subsys/nginx"
    pidfile="/var/run/${prog}.pid"
    
    NGINX_CONF_FILE="/etc/nginx/nginx.conf"
    
    [ -f $sysconfig ] && . $sysconfig
    
    
    start() {
        [ -x $nginx ] || exit 5
        [ -f $NGINX_CONF_FILE ] || exit 6
        echo -n $"Starting $prog: "
        daemon $nginx -c $NGINX_CONF_FILE
        retval=$?
        echo
        [ $retval -eq 0 ] && touch $lockfile
        return $retval
    }
    
    stop() {
        echo -n $"Stopping $prog: "
        killproc -p $pidfile $prog
        retval=$?
        echo
        [ $retval -eq 0 ] && rm -f $lockfile
        return $retval
    }
    
    restart() {
        configtest_q || return 6
        stop
        start
    }
    
    reload() {
        configtest_q || return 6
        echo -n $"Reloading $prog: "
        killproc -p $pidfile $prog -HUP
        echo
    }
    
    configtest() {
        $nginx -t -c $NGINX_CONF_FILE
    }
    
    configtest_q() {
        $nginx -t -q -c $NGINX_CONF_FILE
    }
    
    rh_status() {
        status $prog
    }
    
    rh_status_q() {
        rh_status >/dev/null 2>&1
    }
    
    # Upgrade the binary with no downtime.
    upgrade() {
        local oldbin_pidfile="${pidfile}.oldbin"
    
        configtest_q || return 6
        echo -n $"Upgrading $prog: "
        killproc -p $pidfile $prog -USR2
        retval=$?
        sleep 1
        if [[ -f ${oldbin_pidfile} && -f ${pidfile} ]];  then
            killproc -p $oldbin_pidfile $prog -QUIT
            success $"$prog online upgrade"
            echo 
            return 0
        else
            failure $"$prog online upgrade"
            echo
            return 1
        fi
    }
    
    # Tell nginx to reopen logs
    reopen_logs() {
        configtest_q || return 6
        echo -n $"Reopening $prog logs: "
        killproc -p $pidfile $prog -USR1
        retval=$?
        echo
        return $retval
    }
    
    case "$1" in
        start)
            rh_status_q && exit 0
            $1
            ;;
        stop)
            rh_status_q || exit 0
            $1
            ;;
        restart|configtest|reopen_logs)
            $1
            ;;
        force-reload|upgrade) 
            rh_status_q || exit 7
            upgrade
            ;;
        reload)
            rh_status_q || exit 7
            $1
            ;;
        status|status_q)
            rh_$1
            ;;
        condrestart|try-restart)
            rh_status_q || exit 7
            restart
            ;;
        *)
            echo $"Usage: $0 {start|stop|reload|configtest|status|force-reload|upgrade|restart|reopen_logs}"
            exit 2
    esac

tomcat自动启动脚本（用cs用户进行启动）：

#!/bin/sh 
    # tomcat: Start/Stop/Restart tomcat
    # chkconfig: 2345 40 20
    # description: Tomcat is a Java Servlet Container
    # match these values to your environment:
    export CATALINA_BASE=/home/cs/tomcat
    export CATALINA_HOME=/home/cs/tomcat
    export CATALINA_TMPDIR=/home/cs/tomcat/temp
    export JRE_HOME=/home/cs/java
    # Source function library.
    . /etc/init.d/functions TOMCAT=/home/cs/tomcat
    start() {
         echo -n "Starting Tomcat: "
         #/root/rc.local start
          su - cs  /home/cs/tomcat/bin/startup.sh start
       }
    stop() {
        echo -n "Stopping Tomcat: "
           su - cs /home/cs/tomcat/bin/shutdown.sh stop
    }
    # See how we were called.
    case "$1" in
      start)
          start
      ;;
        stop)
            stop
        ;;
     status)
        ;;
        restart)
           stop
    sleep 2
           start
        ;;
     *)
    echo "Usage: $0 {start stop restart}" ;;
    esac

将启动脚本放到/etc/init.d中然后用命令加入并设置开机自动启动：  
chkconfig –add tomcat  
chkconfig –level 2345 tomcat on