How to use shell to automatically restart the service

Editor to share with you how to use shell to achieve automatic restart service, I believe that most people do not know much about it, so share this article for your reference, I hope you can learn a lot after reading this article, let's learn about it!

The code is as follows:

#! / bin/bash

If [!-f / tmp/down_count]; then

Echo "0" > / tmp/down_count

Fi

Curl-I tomcat-host-o "/ tmp/status" > / dev/null 2 > & 1

Code= `awk 'NR==1 {print $2}' / tmp/ status`

If ["$[code]"-ge 500]; then

Down= `expr $(cat / tmp/down_count) + 1`

Echo "$down" > / tmp/down_count

If ["$down"-gt 3]; then

If [!-f "/ tmp/restart_count"]; then

Echo "0" > / tmp/restart_count

Fi

Restart_count= `expr $(cat / tmp/restart_count) + 1`

Echo "$restart_count" > / tmp/restart_count

If ["$restart_count"-le 2]; then

Echo "tomcat down at `date`" > > / tmp/down_info

/ etc/init.d/tomcat6 restart

Fi

Fi

Else

Echo "0" > / tmp/down_count

Echo "0" > / tmp/restart_count

Fi

The script realizes that when the status code of a web page is detected to appear 3 times in a row, the tomcat6 will be restarted automatically, and only twice in a row.

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