Re: What is "up:standby"? in ceph mds stat => e5: 1/1/1 up {0=ceph-test-3=up:active}, 2 up:standby

[Daniel Carrasco <d.carrasco@xxxxxxxxx>]

On MDS nodes, by default only the first you add is active: The others joins the cluster as standby MDS daemons. When the active fails, then an standby MDS becomes active and continues with the work.

You can change this behaviour setting the max active mds option, but it still on testing and is not recommended for production enviorments.

Greetings!!

2017-06-16 12:40 GMT+02:00 Stéphane Klein <contact@xxxxxxxxxxxxxxxxxxx>:

Hi,

I have installed mdss role with Ansible.

Now, I have this:

root@ceph-test-1:/home/vagrant# ceph fs ls

name: cephfs, metadata pool: cephfs_metadata, data pools: [cephfs_data ]

root@ceph-test-1:/home/vagrant# ceph mds stat

e5: 1/1/1 up {0=ceph-test-3=up:active}, 2 up:standby

root@ceph-test-1:/home/vagrant# ceph status

    cluster 7ecb6ebd-2e7a-44c3-bf0d-ff8d193e03ac

     health HEALTH_OK

     monmap e1: 3 mons at {ceph-test-1=172.28.128.3:6789/0,ceph-test-2=172.28.128.4:6789/0,ceph-test-3=172.28.128.5:6789/0}

            election epoch 10, quorum 0,1,2 ceph-test-1,ceph-test-2,ceph-test-3

      fsmap e5: 1/1/1 up {0=ceph-test-3=up:active}, 2 up:standby

     osdmap e14: 3 osds: 3 up, 3 in

            flags sortbitwise,require_jewel_osds

      pgmap v36: 164 pgs, 3 pools, 2068 bytes data, 20 objects

            102 MB used, 10652 MB / 10754 MB avail

                 164 active+clean

What is up:standby"? in 

# ceph mds stat 

e5: 1/1/1 up {0=ceph-test-3=up:active}, 2 up:standby

Best regards,

Stéphane

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Stéphane Klein <contact@xxxxxxxxxxxxxxxxxxx>
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