Improve persistence of IPAM data

[bboreham]

Currently weave-daemonset.yaml specifies an emptyDir volume which is deleted when the pod is deleted. Since upgrading weave-kube require deleting the pods, this is unsafe.

Reading http://kubernetes.io/docs/user-guide/volumes/, I don't see an obviously better choice.

[Bregor]

I think regular hostPath will suit this as well.
Example:

      volumeMounts:
        - mountPath: /weave_data
          name: data
...
  volumes:
    - name: data
      hostPath:
        path: /var/lib/weave-kube

[bboreham]

Sure, but is there a hostPath we can guarantee to be able to write to on every Linux distro?

CoreOS, for instance, mounts loads of things read-only.

[Bregor]

CoreOS mounts /usr for read-only, but /var and /opt are available to be overwritten.

[awh]

These may be of use:

http://kubernetes.io/docs/user-guide/petset/
http://kubernetes.io/docs/user-guide/persistent-volumes/

[Bregor]

Petset without "normal" network fs is bloody hell. Regular hostPath will be much better for this task I mean.

[awh]

This issue was moved to weaveworks/weave#2610