etcd: throttle restart for availability #11677
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[APPROVALNOTIFIER] This PR is APPROVED This pull-request has been approved by: VannTen The full list of commands accepted by this bot can be found here. The pull request process is described here
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During upgrade, etcd member are restarted all at once. This can impact the availability of the etcd cluster and subsequently of the Kubernetes cluster. Limit the concurrent restart so that the etcd cluster can keep quorum.
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| when: ('etcd' in group_names) | ||
| listen: Restart etcd | ||
| throttle: "{{ groups['etcd'] | length // 2 }}" |
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* etcd: throttle restart for availability During upgrade, etcd member are restarted all at once. This can impact the availability of the etcd cluster and subsequently of the Kubernetes cluster. Limit the concurrent restart so that the etcd cluster can keep quorum. * Simplify etcd handlers
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What type of PR is this?
/kind bug
What this PR does / why we need it:
During upgrade, etcd member are restarted all at once.
This can impact the availability of the etcd cluster and subsequently of
the Kubernetes cluster.
Limit the concurrent restart so that the etcd cluster can keep quorum.
Which issue(s) this PR fixes:
Fixes #11645
Does this PR introduce a user-facing change?: