k8s: Feature Request: Allert if disk is full

[0xErnie]

Recently our Clustercontrol was unavailable and we needed to understand why.

At the end of our research we found out, that the PVC the cluster control is using was full. We resized it and everything was fine again.

Could you please implement an allert, when the storage is full or is going to be full?

You may find our config here: https://gist.github.com/0xErnie/112b92eec027f3a5f1a46986a8e5b97c

This is how the available space looks from inside the container:

[root@clustercontrol /]# df -h
Filesystem      Size  Used Avail Use% Mounted on
overlay         485G  329G  157G  68% /
tmpfs            64M     0   64M   0% /dev
tmpfs            16G     0   16G   0% /sys/fs/cgroup
shm              64M  8.0K   64M   1% /dev/shm
/dev/rbd0        15G  5.4G  9.4G  37% /root/.ssh
/dev/sda1       485G  329G  157G  68% /etc/hosts
tmpfs            16G   12K   16G   1% /run/secrets/kubernetes.io/serviceaccount
tmpfs            16G     0   16G   0% /proc/acpi
tmpfs            16G     0   16G   0% /proc/scsi
tmpfs            16G     0   16G   0% /sys/firmware