On Mon, 2006-05-15 at 15:34 -0700, Keller, Steve wrote: > Hi – > > > > We have a large SiteScope installation (we monitor several thousand > servers with about 20 SiteScope machines) and are considering Nagios > as a replacement. One of the issues we have is that we cannot, for > various (mostly political) reasons, install an agent on the hosts we > monitor. We have successfully tested agentless monitoring by using > Perl plugins that SSH to the remote host and run a command, parsing > the output. However, we cannot run as many monitors per server as in > our SiteScope installation because of the latency incurred by setting > up and breaking down the SSH connection for EACH monitor. > > > > So my question is, does anyone know of a reasonable approach to > agentless monitoring using Nagios? We are planning to try SSH4, which > automatically keeps SSH connections open for later use, and forcing > Nagios to run several scripts sequentlially against the same host. > But this has the problem that a host which is down, or busy, could > delay checking other hosts. > > > > We would like, for many reasons (not just $$$, although that’s a > factor), to use Nagios, but having to install twice or three times as > many servers to support it is out of the question. Any advice > gratefully accepted. > > > > Thanks, <snip> Would it help to run several commands in the ssh tunnel - perhaps even echoing strings for delimiters in the parsing,e.g.,
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