Re: monit doesn't poll all services at once?

[Joe S.]

Alright here is an example:

check host nashville.servershost.net with address nashville.servershost.net
if failed icmp type echo with timeout 15 seconds
then alert
if failed port 80 proto http with timeout 15 seconds
then exec "/bin/sh /etc/restart.sh 80 nashville.servershost.net"
else if recovered then exec "/bin/sh /etc/recover.sh 80 
nashville.servershost.net"
if failed port 22 proto ssh with timeout 15 seconds
then exec "/bin/sh /etc/restart.sh 22 nashville.servershost.net"
else if recovered then exec "/bin/sh /etc/recover.sh 22 
nashville.servershost.net"
if failed port 143 proto imap with timeout 15 seconds
then exec "/bin/sh /etc/restart.sh 143 nashville.servershost.net"
else if recovered then exec "/bin/sh /etc/recover.sh 143 
nashville.servershost.net"
if failed port 110 proto pop with timeout 15 seconds
then exec "/bin/sh /etc/restart.sh 110 nashville.servershost.net"
else if recovered then exec "/bin/sh /etc/recover.sh 110 
nashville.servershost.net"
if failed port 3306 proto mysql with timeout 15 seconds
then exec "/bin/sh /etc/restart.sh 3306 nashville.servershost.net"
else if recovered then exec "/bin/sh /etc/recover.sh 3306 
nashville.servershost.net"
if failed port 2082 with timeout 15 seconds
then exec "/bin/sh /etc/restart.sh 2082 nashville.servershost.net"
else if recovered then exec "/bin/sh /etc/recover.sh 2082 
nashville.servershost.net"
if failed port 2087 with timeout 15 seconds
then exec "/bin/sh /etc/restart.sh 2087 nashville.servershost.net"
else if recovered then exec "/bin/sh /etc/recover.sh 2087 
nashville.servershost.net"
if failed port 21 protocol FTP with timeout 15 seconds
then exec "/bin/sh /etc/restart.sh 21 nashville.servershost.net"
else if recovered then exec "/bin/sh /etc/recover.sh 21 
nashville.servershost.net"
if failed port 25 proto SMTP with timeout 15 seconds
then exec "/bin/sh /etc/restart.sh 25 nashville.servershost.net"
else if recovered then exec "/bin/sh /etc/recover.sh 21 
nashville.servershost.net"


Mostly all it does is goes down a list with the above, but uhm 50 of the 
above, all just through network services as you said.

I have it execute a command to another script so it can send me a different 
type of alert, and work on restarting it differently remotely.

Thanks


----- Original Message ----- 
From: "Jan-Henrik Haukeland" <address@hidden>
To: "This is the general mailing list for monit" <address@hidden>
Sent: Sunday, October 09, 2005 6:07 AM
Subject: Re: monit doesn't poll all services at once?


> On 9. okt. 2005, at 05.56, Joe S. wrote:
>
> > I am wondering if its possible to monitor all services at once,  rather 
> > than one by one, I like to monitor all services remotely,  but when it 
> > goes down the list, it eventually takes around 30  minutes to check if 
> > all services are online before it goes back to  #1 to check.
>
>
> Oj, that sounds much. Is it possible for you to post your monitrc  file 
> here so we can have a closer look.
>
> > is it possible for it instead going down the list,  but to poll 
> > everything, all at once, and continue from there?
> >
> > I know it will eat alot of resources, but its needed to speed  things up 
> > a bit.
>
> It can be a solution to fire of each monitoring in it's own thread.  But 
> this may not even solve the problem in the long run. The stuff  that 
> (probably) take time is network monitoring since monit has a  default 5 
> sec timeout on each connect, read and write. A better  solution than using 
> threads may be to use level triggered event  notification (see e.g. man 
> epoll on Linux and kqueue on BSD and 
> http://www.monkey.org/~provos/libevent/ for a general library). We  could 
> also fork of a monitor process per service monitored like  apache (1.x) 
> does.
>
> I do feel a chill going down my spine for the extra complexity any of 
> these solutions will add :) But maybe we simply *must* rewrite monit  to 
> scale better if more users are experience the same problem. (I  only 
> monitor around 10 services and have never had this problem.)
>
> --
> Jan-Henrik Haukeland
> Mobil +47 97141255
>
>
>
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