I configured Zabbix on a virtual machine at Slicehost and have been quite pleased with the solution. Since it’s physically separate from our production servers it will alert me even if the production network has issues. The virtual machine at Slicehost is cheap and easy to backup. Zabbix is great because it can monitor website … Read more
Since version 5.8, Monit has the status option: STATUS option can be used to explicitly test the HTTP status code returned by the HTTP server. If not used, the http protocol test will fail if the status code returned is greater than or equal to 400. You can override this behaviour by using the status … Read more
There isn’t much to do here. Your current check is syntactically correct, but may not be practical. Why do you care if space utilization is greater than 10%??!? A typical disk check stanza would look like: check device var with path /var if SPACE usage > 80% then alert That basically will send an email … Read more
You can disable this alert by setting up a local alert statement. This is thoroughly documented here: http://mmonit.com/monit/documentation/monit.html#setting_a_local_alert_statement This should do it: check process blop with pidfile /…/blop.pid alert recipient@address.com but not on { pid } start program = “…” stop program = “…”
You’ll usually find the PID files for daemonized processes in /var/run/ on Redhat/CentOS-style systems. Short of that, you can always look in the process init script. For instance, the SSH daemon is started with the script in /etc/init.d/sshd. Sometimes the PID will be defined there (search for pid, PID, PIDFILE, PID_FILE, etc.). However, most other … Read more
Yes. Nagios has support for custom scripts and checks, better integration and more granular notification options. Monit is good for basic system checks and daemons monitoring. Nagios is more flexible, but is also more involved to install. I find that Monit is good for single-host installations, but multi-Monit (M/Monit) really isn’t that good of a … Read more
I usually restart a trivial service (like ntp) that I’m monitoring in order to test the alerts. I did find this suggestion in the mailing list archives… It’s a way to leverage the alert reminder functionality in Monit to ensure that the alert path is functioning properly. Basically, a periodic reminder. Tune the cycle to … Read more
How do I delay the time Monit checks again, just for this process? What you are trying to achieve could be done via “SERVICE POLL TIME” feature of monit Monit documentation says Services are checked in regular intervals given by the set daemon n statement. Checks are performed in the same order as they are … Read more
check process tomcat with pidfile /var/run/tomcat.pid start program = “/etc/init.d/tomcat start” as uid nobody and gid nobody stop program = “/etc/init.d/tomcat stop” # You can also use id numbers instead and write: as uid 99 and with gid 99 if failed port 8080 then restart (source)
In monit, you can use a matching string for processes that do not have a PID. Using the example of a process named “myprocessname”, check process myprocessname matching “myprocessname” start program = “/etc/init.d/myproccessname start” stop program = “/usr/bin/killall myprocessname” if cpu usage > 95% for 10 cycles then restart Maybe if you check to see … Read more