flexkube_etcd_cluster fails to add nodes and loses cluster state

[invidian]

With following error:

Error: failed initializing configuration: failed initializing resource: failed checking current state: failed checking current state of etcd cluster: failed to read configuration status: failed copying from container: Error response from daemon: {"message":"mount /:/var/lib/docker/overlay2/95289e0d963e3d0387f76a8126e7df77b8c749f2c3f53f28652883c0a376ecc2/merged/mnt/host, flags: 0x5000: no space left on device"}