Prometheus-operator: node-exporter could not export all mountpoints

[wkjun]

node-exporter in this yaml :

prometheus-operator/contrib/kube-prometheus/manifests/node-exporter/node-exporter-daemonset.yaml

volumes and mountpoints doesn't content :

"/:/rootfs:ro"

not like node-exporter:
https://github.com/prometheus/node_exporter

why not add the to it?

[brancz]

there are a few things around the node-exporter daemonset we have currently that can be improved, if this change works in your setup, feel free to contribute it :slightly_smiling_face:

[weiwei04]

Since kubernetes not support mount propagation, /:/rootfs:ro will cause some mount/unmount issues on host machine(for example if you use networked block device like ceph rbd/aws ebs etc), see https://github.com/prometheus/node_exporter/pull/660

after this pr https://github.com/kubernetes/kubernetes/pull/46444 merged, I think we can consider run node_exporter with /:/rootfs:ro,rslave.

[brancz]

Mount propagation is now on by default in Kubernetes 1.10, so I’m closing this.