Exit on CSI gRPC conn loss

[ggriffiths]

Signed-off-by: Grant Griffiths grant@portworx.com

What type of PR is this?

/kind cleanup

What this PR does / why we need it:

• This will exit the sidecar container when its gRPC connection to the CSI driver is lost. When a CSI driver goes down, we do not want the sidecar container on that node to still be leader.

Which issue(s) this PR fixes:

Fixes #

We will now exit the external-snapshotter when the connection to a CSI driver is lost, allowing for another leader to takeover.

[k8s-ci-robot]

Hi @ggriffiths. Thanks for your PR.

I'm waiting for a kubernetes-csi or kubernetes member to verify that this patch is reasonable to test. If it is, they should reply with /ok-to-test on its own line. Until that is done, I will not automatically test new commits in this PR, but the usual testing commands by org members will still work. Regular contributors should join the org to skip this step.

Once the patch is verified, the new status will be reflected by the ok-to-test label.

I understand the commands that are listed here.

Instructions for interacting with me using PR comments are available here. If you have questions or suggestions related to my behavior, please file an issue against the kubernetes/test-infra repository.

[ggriffiths]

/assign xing-yang

[xing-yang]

/ok-to-test

[xing-yang]

/lgtm

[xing-yang]

/approve

[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: ggriffiths, xing-yang

The full list of commands accepted by this bot can be found here.

The pull request process is described here

Needs approval from an approver in each of these files:

• OWNERS [xing-yang]

Approvers can indicate their approval by writing /approve in a comment
Approvers can cancel approval by writing /approve cancel in a comment