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Merge pull request #28235 from SergeyKanzhelev/clarificationOnShutdownStatus

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Clarification of a new shutdown status of a pod
This commit is contained in:
Kubernetes Prow Robot
2021-06-21 17:11:58 -07:00
committed by GitHub
parent 12c57e6683 4bb1fc1f8c
commit 9b49165995
1 changed files with 16 additions and 1 deletions
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content/en/docs/concepts/architecture/nodes.md
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@@ -283,7 +283,7 @@ The node eviction behavior changes when a node in a given availability zone
becomes unhealthy. The node controller checks what percentage of nodes in the zone becomes unhealthy. The node controller checks what percentage of nodes in the zone
are unhealthy (NodeReady condition is ConditionUnknown or ConditionFalse) at are unhealthy (NodeReady condition is ConditionUnknown or ConditionFalse) at
the same time: the same time:
- If the fraction of unhealthy nodes is at least `--unhealthy-zone-threshold` - If the fraction of unhealthy nodes is at least `--unhealthy-zone-threshold`
(default 0.55), then the eviction rate is reduced. (default 0.55), then the eviction rate is reduced.
- If the cluster is small (i.e. has less than or equal to - If the cluster is small (i.e. has less than or equal to
`--large-cluster-size-threshold` nodes - default 50), then evictions are stopped. `--large-cluster-size-threshold` nodes - default 50), then evictions are stopped.
@@ -377,6 +377,21 @@ For example, if `ShutdownGracePeriod=30s`, and
for gracefully terminating normal pods, and the last 10 seconds would be for gracefully terminating normal pods, and the last 10 seconds would be
reserved for terminating [critical pods](/docs/tasks/administer-cluster/guaranteed-scheduling-critical-addon-pods/#marking-pod-as-critical). reserved for terminating [critical pods](/docs/tasks/administer-cluster/guaranteed-scheduling-critical-addon-pods/#marking-pod-as-critical).
{{< note >}}
When pods were evicted during the graceful node shutdown, they are marked as failed.
Running `kubectl get pods` shows the status of the the evicted pods as `Shutdown`.
And `kubectl describe pod` indicates that the pod was evicted because of node shutdown:
```
Status: Failed
Reason: Shutdown
Message: Node is shutting, evicting pods
```
Failed pod objects will be preserved until explicitly deleted or [cleaned up by the GC](/docs/concepts/workloads/pods/pod-lifecycle/#pod-garbage-collection).
This is a change of behavior compared to abrupt node termination.
{{< /note >}}
## {{% heading "whatsnext" %}} ## {{% heading "whatsnext" %}}
* Learn about the [components](/docs/concepts/overview/components/#node-components) that make up a node. * Learn about the [components](/docs/concepts/overview/components/#node-components) that make up a node.