On 24/02/2015 11:57, John Spray wrote:
It would be great, if there will be internal possibility to collect
info about whole cluster from one node. May be, something like
extension for "tell" command, which can call any node directly and
replace external network connections. Or improved version of "ceph osd
perf" command, which would allow to get more info.
This pretty much already exists if someone chooses to deploy
diamond+graphite. Perhaps we need to talk about what's wrong with
that solution as it stands? I'm guessing the main problem is that
it's less highly available than ceph mons, and comparatively
heavyweight, especially if one is only interested in the latest values.
Ah, I also forgot to mention: it is not very hard to make a cut-down
version of calamari that doesn't require lots of heavyweight
dependencies. I started building this a while back before switching
tasks, but there's an old branch here:
https://github.com/ceph/calamari/commits/wip-lite
The key things there are that it doesn't require a postgres database,
and the remote-execution is abstracted into a "Remote" interface so that
you can implement alternatives to salt (e.g. SSH, or run locally on
mon). It's all free software so borrow what you wish ;-) The point is
that it isn't necessary to start from scratch in order to get something
lightweight.
Cheers,
John
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