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Revert Graceful Node Shutdown feature

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* Disable Kubelet Graceful Node Shutdown on worker nodes (enabled in
Kubernetes v1.25.0 https://github.com/poseidon/typhoon/pull/1222)
* Graceful node shutdown shutdown allows 30s for critical pods to
shutdown and 15s for regular pods to shutdown before releasing the
inhibitor lock to allow the host to shutdown
* Unfortunately, both pods and the node are shutdown at the same
time at the end of the 45s period without further configuration
options. As a result, regular pods and the node are shutdown at the
same time. In practice, enabling this feature leaves Error or Completed
pods in kube-apiserver state until manually cleaned up. This feature
is not ready for general use
* Fix issue where Error/Completed pods are accumulating whenever any
node restarts (or auto-updates), visible in kubectl get pods
* This issue wasn't apparent in initial testing and seems to only
affect non-critical pods (due to critical pods being killed earlier)
But its very apparent on our real clusters

Rel: https://github.com/kubernetes/kubernetes/issues/110755
This commit is contained in:
Dalton Hubble 2022-09-10 14:34:12 -07:00
parent 5f612c82e2
commit 1786e34f33
11 changed files with 3 additions and 20 deletions
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3
CHANGES.md
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@ -4,6 +4,9 @@ Notable changes between versions.
## Latest
* Revert Kubelet Graceful Node Shutdown on worker nodes ([#1227](https://github.com/poseidon/typhoon/pull/1227))
* Fix issue where non-critical pods are left in Error/Completed state on node shutdown
### Addons
* Update kube-state-metrics from v2.5.0 to [v2.6.0](https://github.com/kubernetes/kube-state-metrics/releases/tag/v2.6.0)

2
aws/fedora-coreos/kubernetes/workers/butane/worker.yaml
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@ -122,8 +122,6 @@ storage:
featureGates:
LocalStorageCapacityIsolationFSQuotaMonitoring: false
rotateCertificates: true
shutdownGracePeriod: 45s
shutdownGracePeriodCriticalPods: 30s
staticPodPath: /etc/kubernetes/manifests
readOnlyPort: 0
resolvConf: /run/systemd/resolve/resolv.conf

2
aws/flatcar-linux/kubernetes/workers/butane/worker.yaml
View File

@ -121,8 +121,6 @@ storage:
featureGates:
LocalStorageCapacityIsolationFSQuotaMonitoring: false
rotateCertificates: true
shutdownGracePeriod: 45s
shutdownGracePeriodCriticalPods: 30s
staticPodPath: /etc/kubernetes/manifests
readOnlyPort: 0
resolvConf: /run/systemd/resolve/resolv.conf

2
azure/fedora-coreos/kubernetes/workers/butane/worker.yaml
View File

@ -117,8 +117,6 @@ storage:
featureGates:
LocalStorageCapacityIsolationFSQuotaMonitoring: false
rotateCertificates: true
shutdownGracePeriod: 45s
shutdownGracePeriodCriticalPods: 30s
staticPodPath: /etc/kubernetes/manifests
readOnlyPort: 0
resolvConf: /run/systemd/resolve/resolv.conf

2
azure/flatcar-linux/kubernetes/workers/butane/worker.yaml
View File

@ -117,8 +117,6 @@ storage:
featureGates:
LocalStorageCapacityIsolationFSQuotaMonitoring: false
rotateCertificates: true
shutdownGracePeriod: 45s
shutdownGracePeriodCriticalPods: 30s
staticPodPath: /etc/kubernetes/manifests
readOnlyPort: 0
resolvConf: /run/systemd/resolve/resolv.conf

2
bare-metal/fedora-coreos/kubernetes/butane/worker.yaml
View File

@ -128,8 +128,6 @@ storage:
featureGates:
LocalStorageCapacityIsolationFSQuotaMonitoring: false
rotateCertificates: true
shutdownGracePeriod: 45s
shutdownGracePeriodCriticalPods: 30s
staticPodPath: /etc/kubernetes/manifests
readOnlyPort: 0
resolvConf: /run/systemd/resolve/resolv.conf

2
bare-metal/flatcar-linux/kubernetes/butane/worker.yaml
View File

@ -118,8 +118,6 @@ storage:
featureGates:
LocalStorageCapacityIsolationFSQuotaMonitoring: false
rotateCertificates: true
shutdownGracePeriod: 45s
shutdownGracePeriodCriticalPods: 30s
staticPodPath: /etc/kubernetes/manifests
readOnlyPort: 0
resolvConf: /run/systemd/resolve/resolv.conf

2
digital-ocean/fedora-coreos/kubernetes/butane/worker.yaml
View File

@ -122,8 +122,6 @@ storage:
featureGates:
LocalStorageCapacityIsolationFSQuotaMonitoring: false
rotateCertificates: true
shutdownGracePeriod: 45s
shutdownGracePeriodCriticalPods: 30s
staticPodPath: /etc/kubernetes/manifests
readOnlyPort: 0
resolvConf: /run/systemd/resolve/resolv.conf

2
digital-ocean/flatcar-linux/kubernetes/butane/worker.yaml
View File

@ -121,8 +121,6 @@ storage:
featureGates:
LocalStorageCapacityIsolationFSQuotaMonitoring: false
rotateCertificates: true
shutdownGracePeriod: 45s
shutdownGracePeriodCriticalPods: 30s
staticPodPath: /etc/kubernetes/manifests
readOnlyPort: 0
resolvConf: /run/systemd/resolve/resolv.conf

2
google-cloud/fedora-coreos/kubernetes/workers/butane/worker.yaml
View File

@ -116,8 +116,6 @@ storage:
featureGates:
LocalStorageCapacityIsolationFSQuotaMonitoring: false
rotateCertificates: true
shutdownGracePeriod: 45s
shutdownGracePeriodCriticalPods: 30s
staticPodPath: /etc/kubernetes/manifests
readOnlyPort: 0
resolvConf: /run/systemd/resolve/resolv.conf

2
google-cloud/flatcar-linux/kubernetes/workers/butane/worker.yaml
View File

@ -116,8 +116,6 @@ storage:
featureGates:
LocalStorageCapacityIsolationFSQuotaMonitoring: false
rotateCertificates: true
shutdownGracePeriod: 45s
shutdownGracePeriodCriticalPods: 30s
staticPodPath: /etc/kubernetes/manifests
readOnlyPort: 0
resolvConf: /run/systemd/resolve/resolv.conf