Cron to check that domains are running.

[amssb]

Hi,

I have a dedicated server (lamp & cpanel) under which I host different web domains:

http://www.domain1.com,

http://www.domain2.com,

http://www.domain3.com,

http://www.domain4.com,

...

I'm upset because sometimes (rarely, though) I discovered (by opening

http://www.domainX.com

in the browser) that my domains did not work and I had to restart apache using my root privileges.

Do you have any idea how can I automatically check if such a situation occurs again? A cron job or something like that?

Thanks a lot for your time,
Sorin

 

[nerbonne]

Without actually having tried this myself, this looks like it would work fine:

http://www.macosxhints.com/article.php?story=20050101130423871

 

[nerbonne]

It actually does work great, I just tried it on one of my servers.

 

[feherke]

Hi

I think that is a bad approach. Just because the process exists not means that it actually does its job. I would do something like this :

[COLOR=chocolate]read[/color] protocol response message [teal]<<<[/teal] [green][i]"$( netcat -w 5 $HOSTNAME 80 <<< $'GET / HTTP/1.1[/i][/green][lime][i]\n[/i][/lime][green][i]Host: $HOSTNAME[/i][/green][lime][i]\n[/i][/lime][green][i]Connection: close[/i][/green][lime][i]\n[/i][/lime][green][i]' )"[/i][/green]

[b]if[/b] [teal][[[/teal] [green][i]"$response"[/i][/green] [teal]!=[/teal] [green][i]'200'[/i][/green] [teal]]];[/teal] [b]then[/b]
  /etc/init[teal].[/teal]d/httpd stop
  sleep [purple]3[/purple]
  /etc/init[teal].[/teal]d/httpd start
[b]fi[/b]

This exact syntax will work only with [tt]bash[/tt].

Sorin, maybe the best would be to take a look at your distribution's package list. Is possible to have such monitoring software there.


Feherke.

http://rootshell.be/~feherke/

 

[BMurtagh]

Hi Sorin,

I would consider speaking with your host about setting up monitor pages for each of the domains or use a 3rd party monitoring system that checks the site/page for uptime. As far as actually monitoring software Nagios is one, but may be overkill and your host should have the ability to configure individual monitors. Typically these require a test page (

http://www.domainX.com/monitor.php)

and reference a "success", etc. string to be outputted to the page that the monitor checks for. If its not found the alert goes off to be investigated.


-Brendan

Brendan Murtagh - HostMySite.com
Technical Support Representative
bmurtagh@hostmysite.com

http://www.hostmysite.com?utm_source=bb