On Wed, March 16, 2016 9:41 pm, Woods, Trevor T wrote:
Hi, what's the best way to send data between xymon servers when http is not available. Our network will be very restricted and we can only send files through. I have setup a centralized master xymon server ready to go just trying to find the best solution of getting the data to it from the child servers. All I have found so far is creating pre generated report for the master server to read.
Regards, Trev
Hi Trev,
It depends a little bit on what you mean by "between xymon servers" here.
Xymon inherently communicates using an extended version of the Big Brother protocol on port 1984, so there's typically no http involved except for the actual (human) viewing of pages generated by the 'xymongen' program and associated CGIs.
The primary way HTTP can be utilized is by xymoncgimsg being installed on a xymond server, which accepts single messages over HTTP transport and relays them locally. (If you know for a fact that you're only using one-way messages that don't need a reply, it's been reported that HTTP proxies w/ nginx can be used to accept transport as well.)
The "summary" messages made by xymongen can reference an http/https destination but the communication is still via the BB protocol.
The port used for the BB protocol can be changed to an arbitrary one, and some folks use port 80/443/8080/8443/etc to get around a firewall, but you're still just speaking BB.
There's also xymonproxy (receive and relay), xymonfetch (retrieve from clients), and msgcache (store local messages on clients until picked up), which can all also run on arbitrary ports, but -again- you're still just speaking BB there.
Generally speaking, when you're behind a restrictive firewall like that, some combination of xymonproxy on a single machine behind the FW for servers to send messages to, with a single hole for that box to report upwards to your main xymon server, and a single xymonnet instance behind the firewall to do your local network testing is used.
If you have lots of inbound access, just no outbound access, either the msgcache/xymonfetch solution, or a remote SSH call like Jeremy's xymon-rclient script (http://tools.rebel-it.com.au/xymon-rclient/) could be used. (Some of this might depend on your concurrency and performance needs.)
HTH, -jc