mon b is low on available space

[Olivier S.]

kubectl version --short

Client Version: v1.18.1

Server Version: v1.18.2

ceph version

ceph version 15.2.4 (7447c15c6ff58d7fce91843b705a268a1917325c) octopus (stable)

rook package --branch release-1.4

Hi,

In my test environment, my kubernetes cluster is composed of 1 master and 3 worker nodes.

To test Rook-Ceph, I use the default cluster.yaml file configured to use all nodes and all devices.

For each worker node, two disks have been added 20Gb and 10 Gb

So I have a lot of free space.

rook-ceph have been deployed successfully.

Nethertheless, the Health is not OK, but in Warning, with : 

ceph -s

  cluster:

    id:     b75eef6a-8194-45d5-b0a9-626d2416a822

    health: HEALTH_WARN

            mon b is low on available space

 

  services:

    mon: 3 daemons, quorum a,b,c (age 17h)

    mgr: a(active, since 16h)

    osd: 6 osds: 6 up (since 17h), 6 in (since 17h)

 

  data:

    pools:   1 pools, 1 pgs

    objects: 0 objects, 0 B

    usage:   6.0 GiB used, 84 GiB / 90 GiB avail

    pgs:     1 active+clean

 

[root@rook-ceph-tools-7d9467775-n8s6k /]# ceph df

--- RAW STORAGE ---

CLASS  SIZE    AVAIL   USED    RAW USED  %RAW USED

hdd    90 GiB  84 GiB  19 MiB   6.0 GiB       6.69

TOTAL  90 GiB  84 GiB  19 MiB   6.0 GiB       6.69

 

--- POOLS ---

POOL                   ID  STORED  OBJECTS  USED  %USED  MAX AVAIL

device_health_metrics   1     0 B        0   0 B      0     25 GiB

Would you have an idea how I can fix that ? Is it a bug ?

Thank you