Re: [webmin-l] "Ping monitoring" with Webmin fails repeatedly, but is often false positive?

[Jamie C. <jca...@we...>]

On 02/Jul/2018 22:48 Joaquim Homrighausen <jo...@we...> wrote ..
> 
> We use Webmin for basic monitoring of a number of servers. We usually 
> set the check interval to somewhere between 15 and 30 minutes, depending 
> on which server it is.
> 
> Quite often, we'll get a "monitor down" for a server, at which point we 
> check the server and find it to be very much up and running. On the next 
> check, Webmin will again report the server (or monitor) to be up. We 
> typically see this reported from "monitoring servers" that have a lot of 
> checks defined. Could this somehow confuse Webmin or congest the network 
> stack somehow?
> 
> If this only happened once or on one server, I wouldn't worry so much 
> about it. But we recently switched one of our "bigger" monitoring 
> servers from one cloud platform to another, which completely different 
> architecture behind it, and then re-created the monitors on the new 
> server. Sure enough, pretty soon we began seeing false positives again.

One possible work-around is to edit the ping monitor and increase the number
of failures before emailing from the default of 1 to 2 or 3.

> (By the way, it'd be nice if one could export monitors and then 
> re-import them on another server)

You could do this manually already by copying files from /etc/webmin/status
to the new system.