linux - Dovecot/Amavis 重启脚本(正在进行中)

Question

我们有一个邮件服务器快要死了，在退役之前正在将帐户迁移到新服务器。该计算机拥有跨 25 个以上域的 800 多个电子邮件帐户，因此在迁移完成之前保持正常运行非常重要。

最近它开始充满错误日志，由于没有空间而卡住mysql，停止邮件流，通常让我头疼。在找到并修复错误的根本问题之前，我想出了一个脚本来检查 Dovecot 和 Amavis-new 是否正在运行，如果没有则重新启动它们。

阅读后: https://stackoverflow.com/a/7096003/4820993

以及其他一些常见示例，我想出了这个。

netstat -an|grep -ce ':993.*LISTEN' >/dev/null 2>&1

if [ $? = 0 ]
then
    echo 'Dovecot is up';
else
    echo 'Dovecot is down, restarting...';
        /etc/init.d/dovecot restart
        logger -p mail.info dovecot_keepalive: Dovecot is down, restarting...
fi

/etc/init.d/amavis status |grep -ce 'running' >/dev/null 2>&1

if [ $? = 0 ]
then
    echo 'AmavisD is up';
else
    echo 'AmavisD is down, restarting...';
    /etc/init.d/amavis restart
    sleep 2
    /etc/init.d/amavis status |grep -ce 'running' >/dev/null 2>&1
        if [ $? = 1 ]
        then
            echo 'AmavisD had a problem restarting, trying to fix it now...';
            logger -p mail.info amavis_keepalive: AmavisD had a problem restarting...
            output=$(ps aux|grep a\[m\]avisd)
            set -- $output
            pid=$2
            kill $pid
            rm /var/run/amavis/amavisd.pid
            /etc/init.d/amavis start
        else
            echo 'AmavisD restarted successfully';
            logger -p mail.info amavis_keepalive: AmavisD is down, restarting...
        fi
fi

谁知道呢，我可能会让事情变得更加困难，如果是这样，请告诉我!!!

我对照 http://www.shellcheck.net 进行了检查并根据其调试报告进行更新/更正。我正在从其他地方的示例中将其拼凑在一起，并且希望有人在我实现它之前对其进行校对。

检查 dovecot 的第一部分已经作为每 6 小时的 cronjob 运行得很好(是的，服务器搞砸了，我们需要检查它)，这是关于 amavis 的部分，我不确定。

Answer 1

您可以使用Monit它将监视您的服务并自行重新启动。

Amavisd:

# File: /etc/monit.d/amavisd
# amavis
check process amavisd with pidfile /var/amavis/amavisd.pid
   group services
   start program = "/etc/init.d/amavisd start"
   stop  program = "/etc/init.d/amavisd stop"
   if failed port 10024 then restart
   if 5 restarts within 5 cycles then timeout

鸽舍:

# File: /etc/monit.d/dovecot
check process dovecot with pidfile /var/run/dovecot/master.pid
   start program = "/etc/init.d/dovecot start"
   stop program = "/etc/init.d/dovecot stop"
   group mail
   if failed host localhost port 993 type tcpssl sslauto protocol imap then restart
   if failed host localhost port 143 protocol imap  then restart
   if 5 restarts within 5 cycles then timeout
   depends dovecot_init
   depends dovecot_bin
check file dovecot_init with path /etc/init.d/dovecot
   group mail
check file dovecot_bin with path /usr/sbin/dovecot
   group mail