HostOutOfDiskSpace Clarification

[Deeraj V]

Hello Team,

I would like to raise alerts when host is out of disk, i am using following Expression for evaluation.

(node_filesystem_avail_bytes{job="kubernetes-service-endpoints"} * 100) / (node_filesystem_size_bytes{job="kubernetes-service-endpoints"}) < 10  ,

But my my host has ceph storage as separate drive, but these drive i m unable to evaluate the usage with above expression.

In the above expression i can see only host level disk usage evaluation , even i am getting alert on those.

Is there any way to find expression for ceph drives usage? 

Note:, I have work around for this , I tried with getting usage with following expression 

expr: max(container_fs_usage_bytes{device=~"/dev/.*"}/container_fs_limit_bytes{device=~"/dev/.*"}*100) by(cluster,instance,device)  > 75 < 90

I knew its not valid expression, this will evaluate file usage of container.

Do you have any idea on this? 

Thanks in advance if anybody has implemented so far.

Thanks

DV