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Merge pull request #55015 from fasaxc/calico-disable-grace

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Automatic merge from submit-queue (batch tested with PRs 53645, 54734, 54586, 55015, 54688). If you want to cherry-pick this change to another branch, please follow the instructions <a href="https://github.com/kubernetes/community/blob/master/contributors/devel/cherry-picks.md">here</a>.

Disable the grace termination period for the calico/node pod

**What this PR does / why we need it**:

Disable the termination grace period for the calico/node add-on DaemonSet.  The grace period is unnecessary for calico/node and it delays restart of a new calico/node pod to take over routing and policy updates.

Setting the grace period to 0 has the special meaning of doing a force deletion, which avoids a slow round-trip through the kubelet and API server.

**Which issue(s) this PR fixes** *(optional, in `fixes #<issue number>(, fixes #<issue_number>, ...)` format, will close the issue(s) when PR gets merged)*:

Fixes #55013

**Special notes for your reviewer**:

**Release note**:

```release-note
Disable the termination grace period for the calico/node add-on DaemonSet to reduce downtime during a rolling upgrade or deletion.
```
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Kubernetes Submit Queue 2017-11-06 15:33:47 -08:00 committed by GitHub
commit f35c4a2b5f
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3
cluster/addons/calico-policy-controller/calico-node-daemonset.yaml
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@ -24,6 +24,9 @@ spec:
projectcalico.org/ds-ready: "true"
hostNetwork: true
serviceAccountName: calico
# Minimize downtime during a rolling upgrade or deletion; tell Kubernetes to do a "force
# deletion": https://kubernetes.io/docs/concepts/workloads/pods/pod/#termination-of-pods.
terminationGracePeriodSeconds: 0
containers:
# Runs calico/node container on each Kubernetes node. This
# container programs network policy and routes on each