Re: separate monitoring node

Kevin Hrpcek <kevin.hrpcek@xxxxxxxxxxxxx> · Tue, 19 Jun 2018 10:17:37 -0500



    I use icinga2 as well with a check_ceph.py that I
      wrote a couple years ago. The method I use is that icinga2 runs
      the check from the icinga2 host itself. ceph-common is installed
      on the icinga2 host since the check_ceph script is a wrapper and
      parser for the ceph command output using python's subprocess. The
      script takes a conf, id, and keyring argument so it acts like a
      ceph client and only the conf and keyring need to be present. I
      added a cephx user for the icinga checks. I also use icinga2,nrpe,check_proc to check the
        correct number of osd/mon/mgr/mds are running on a host.

      
      # ceph auth get client.icinga

      exported keyring for client.icinga

      [client.icinga]

          key = <nope>

          caps mgr = "allow r"

          caps mon = "allow r"

      
      I just realized my script on github is the first or second result
      when googling for icinga2 ceph checks so there is a chance you are
      trying to use the same thing as me.

      
      Kevin

      
    On 06/19/2018 07:17 AM, Denny Fuchs
      wrote:

    
    Hi,
      

      at the moment, we use Icinga2, check_ceph* and Telegraf with the
      Ceph plugin. I'm asking what I need to have a separate host, which
      knows all about the Ceph cluster health. The reason is, that each
      OSD node has mostly the exact same data, which is transmitted into
      our database (like InfluxDB or MySQL) and wasting space. Also if
      something is going on, we get alerts for each OSD.
      

      So my idea is, to have a separate VM (on external host) and we use
      only this host for monitoring the global cluster state and
      measurements.
      

      Is it correct, that I need only to have mon and mgr as services ?
      Or should I do monitoring in a different way?
      

      cu denny
      

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