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Top Forums UNIX for Beginners Questions & Answers Server monitoring using shell script Post 302972997 by imort on Thursday 12th of May 2016 12:51:05 PM
Old 05-12-2016
Quote:
Originally Posted by kk123
I want to write a shell script which is used in cron job and it runs every 4 hours to check whether tomcat servers are running or not .
Well, you can write a script that will execute something like 'service tomcat status', parse output with grep and start it if they didn't run.

It's a common job actually.

You can use a supervisord instead, which can run any service or program and immediately restart if it.

Or you can use Munin for the same goal: monitor the service or process and start if it's fail. You can look for some examples here.

I'd suggest you to invest some time to learn a well known and supported tool instead of making a your own script.
 

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OCF_HEARTBEAT_TOMCAT(7) 					OCF resource agents					   OCF_HEARTBEAT_TOMCAT(7)

NAME
ocf_heartbeat_tomcat - Manages a Tomcat servlet environment instance SYNOPSIS
tomcat [start | stop | status | monitor | meta-data | validate-all] DESCRIPTION
Resource script for tomcat. It manages a Tomcat instance as an HA resource. SUPPORTED PARAMETERS
tomcat_name The name of the resource (optional, string, no default) script_log A destination of the log of this script (optional, string, no default) tomcat_stop_timeout Time-out at the time of the stop (optional, integer, no default) tomcat_suspend_trialcount The re-try number of times awaiting a stop (optional, integer, no default) tomcat_user A user name to start a resource (optional, string, no default) statusurl URL for state confirmation (optional, string, no default) java_home Home directory of the Java (required, string, no default) catalina_home Home directory of Tomcat (required, string, no default) catalina_pid A PID file name of Tomcat (optional, string, no default) tomcat_start_opts Tomcat start options (optional, string, no default) catalina_opts Catalina options (optional, string, no default) catalina_rotate_log Rotate catalina.out flag (optional, string, no default) catalina_rotatetime Time span of the rotate catalina.out (optional, integer, no default) SUPPORTED ACTIONS
This resource agent supports the following actions (operations): start Starts the resource. Suggested minimum timeout: 60s. stop Stops the resource. Suggested minimum timeout: 120s. status Performs a status check. Suggested minimum timeout: 60. monitor Performs a detailed status check. Suggested minimum timeout: 30s. Suggested interval: 10s. meta-data Retrieves resource agent metadata (internal use only). Suggested minimum timeout: 5s. validate-all Performs a validation of the resource configuration. Suggested minimum timeout: 5. EXAMPLE
The following is an example configuration for a tomcat resource using the crm(8) shell: primitive example_tomcat ocf:heartbeat:tomcat params java_home=string catalina_home=string op monitor depth="0" timeout="30s" interval="10s" SEE ALSO
http://www.linux-ha.org/wiki/tomcat_(resource_agent) AUTHOR
Linux-HA contributors (see the resource agent source for information about individual authors) resource-agents 1.0.3 07/05/2010 OCF_HEARTBEAT_TOMCAT(7)
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