monitoring xen machine status from Dom0
Has anyone started thinking about or working on script(s) to monitor xen machines from the Dom0? It would be nice to have some of the data that xentop and other tools display in Hobbit and I would rather work with others on this list to develop the scripts rather than do everything on my own, if possible.
I'm really new to Xen, so I still have a lot to learn.
Tom
-- Tom Georgoulias Sr. Systems Engineer McClatchy Interactive tomg at mcclatchyinteractive.com
From: Tom Georgoulias <tomg at mcclatchyinteractive.com> Reply-To: hobbit at hswn.dk To: hobbit mailing list <hobbit at hswn.dk> Subject: [hobbit] monitoring xen machine status from Dom0 Date: Mon, 20 Aug 2007 12:46:18 -0400
Has anyone started thinking about or working on script(s) to monitor xen machines from the Dom0? It would be nice to have some of the data that xentop and other tools display in Hobbit and I would rather work with others on this list to develop the scripts rather than do everything on my own, if possible.
I don't have need for Xen hb monitoring so far. Instead I do like to see my Free VMWare server got measured/graphed by hobbit server using VMWare's perl API. Example, like how many session are running etc.
tj
I'm really new to Xen, so I still have a lot to learn.
Tom
-- Tom Georgoulias Sr. Systems Engineer McClatchy Interactive tomg at mcclatchyinteractive.com
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T.J. Yang wrote:
Has anyone started thinking about or working on script(s) to monitor xen machines from the Dom0? It would be nice to have some of the data that xentop and other tools display in Hobbit and I would rather work with others on this list to develop the scripts rather than do everything on my own, if possible.
I don't have need for Xen hb monitoring so far. Instead I do like to see my Free VMWare server got measured/graphed by hobbit server using VMWare's perl API. Example, like how many session are running etc.
Monitoring the xen virtual machines by running a hobbit client within those virtual machines is easy and something I'm already doing. It works fine pretty much out of the box.
I have noticed that the network charts under the trends column of the server that is hosting all of the xen virtual machines gets pretty cluttered as VMs are stopped and started, because xen assigns them a new domain ID each time (similar to a process ID) and that causes new network interfaces to show up in the charts (under the names vif<id>.<nic ID>). Start and stop VMs about ten times and you are looking at a chart with interfaces like vif1.0, vif2.0, vif3.0..... It gets crazy. :)
I thought it would be useful to have additional data about the impact of those virtual machines on the server that is hosting them, and one easy way to gather that data would be add a client side ext script that would run the xentop command in a batch mode, then send it over to the hobbit server for processing by the NCV module or just as a status report.
Tom
Tom Georgoulias Sr. Systems Engineer McClatchy Interactive tomg at mcclatchyinteractive.com
Tom Georgoulias wrote:
T.J. Yang wrote:
Has anyone started thinking about or working on script(s) to monitor xen machines from the Dom0? It would be nice to have some of the data that xentop and other tools display in Hobbit and I would rather work with others on this list to develop the scripts rather than do everything on my own, if possible.
I thought it would be useful to have additional data about the impact of those virtual machines on the server that is hosting them, and one easy way to gather that data would be add a client side ext script that would run the xentop command in a batch mode, then send it over to the hobbit server for processing by the NCV module or just as a status report.
Here's a cheap first run of a client side ext script that will send xentop data to your Hobbit server. It doesn't act on any of the data and cause alerts, but we plan to add that later on unless someone else beats us to it.
Run it as a Hobbit client ext script on your Dom0 (not on the Hobbit client running on the DomUs) and give the Hobbit user sudo access to xentop, and xentop data will be displayed under the "xen" column in Hobbit. If anyone makes enhancements to it, please share them.
Tom Georgoulias Sr. Systems Engineer McClatchy Interactive tomg at mcclatchyinteractive.com
participants (2)
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tj_yang＠hotmail.com
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tomg＠mcclatchyinteractive.com