autorestart a process if it is down

[chrisduplateau]

hello, I can monitor processes (as apache2 or mysql), but how can I auto-restart one of them if it is down ?
Thank you for your answers.

[schurzi]

Hi chrisduplateau,

I would not recomend you to do this with cacti.
It is not impossible, but it would be like teaching a dog to write a book.

There are several other tools out there that can do this type of thing.
For example Nagios can monitor and restart services. But for small deployments i would recomend moint (http://mmonit.com/monit/). I haven't used it myself, but it made a good impression when i saw it in an presentation.

And I have to add. If your apache crashes as fequently as this graph shows, you have most likely other problems, that a restart script won't solve.

[chrisduplateau]

Thank you fo your answer, in fact my apache2 does not crash as we can see on the graph, I sometimes have "gaps", I don't get informations, (it's also true for other monitorings like CPU usage, memory usage...). I don't know why I get those gaps, I perhaps should post a topic in this forum !
I'm gonna see other tools, thanks.

[khufure]

Thank you fo your answer, in fact my apache2 does not crash as we can see on the graph, I sometimes have "gaps", I don't get informations, (it's also true for other monitorings like CPU usage, memory usage...). I don't know why I get those gaps, I perhaps should post a topic in this forum !
I'm gonna see other tools, thanks.

Check in Cacti console -> device -> availability. If its low increase the timeout to the device or check the device's SNMP capability.

Otherwise.. it is an ongoing topic in Cacti. Look for keyword "gaps" in a search. Some tricks that usually work is to increase the processes <cmd.php poller> or threads <spine poller>. When your installation gets bigger you need more tricks.

Regards

[chrisduplateau]

Many thanks, I'm gonna search in the forum (good availability for all my machines)

[khufure]

Many thanks, I'm gonna search in the forum (good availability for all my machines)

Happy to help. Also, the developers are really excellent at providing information back. But.. it's their hobby, give them time to respond if you need an answer back.

BTW, for your graph you may want to increase the width to 530 or 550 so it will fit on the page.

graph management -> keyword search or filter by host -> select graph -> change width from 500 to 530 or 550. save.