update leader election defaults so it handles 60s of kube-apiserver communication disruption#1104
Merged
openshift-merge-robot merged 1 commit intoopenshift:masterfrom Jul 8, 2021
Merged
Conversation
openshift-ci
bot
added
the
approved
| func LeaderElectionDefaulting(config configv1.LeaderElection, defaultNamespace, defaultName string) configv1.LeaderElection { | ||
| ret := *(&config).DeepCopy() | ||
|
|
||
| // 1. lock skew tolerance is leaseDuration-renewDeadline == 22s |
Contributor
There was a problem hiding this comment.
I might suggest we call this method FastLeaderElectionDefaulting or CriticalLeaderElectionDefaulting, since these defaults should only be used for the most critical services. Are there a set of library-go based operators that are not critical that can tolerate 30s / 3 retry leases?
One more question - why are you trying to have 6 retries (i.e. what reason for 6 vs 3)?
Contributor
Author
There was a problem hiding this comment.
I might suggest we call this method
FastLeaderElectionDefaultingorCriticalLeaderElectionDefaulting, since these defaults should only be used for the most critical services. Are there a set of library-go based operators that are not critical that can tolerate 30s / 3 retry leases?One more question - why are you trying to have 6 retries (i.e. what reason for 6 vs 3)?
Now answered in the code comments.
Contributor
|
I appreciate the commit title. LGTM |
…ommunication disruption
Contributor
|
/lgtm |
Contributor
|
[APPROVALNOTIFIER] This PR is APPROVED This pull-request has been approved by: deads2k, smarterclayton The full list of commands accepted by this bot can be found here. The pull request process is described here DetailsNeeds approval from an approver in each of these files:
Approvers can indicate their approval by writing |
timflannagan
added a commit
to timflannagan/operator-framework-olm
that referenced
this pull request
Jul 27, 2021
Update the package-server-manager controller and update the leader election intervals. This is in order to comply with the need for OCP components to be able to withstand 60s of API server disruption on SNO-enabled clusters. For more information, see the following resources: - openshift/library-go#1104 (comment) - https://bugzilla.redhat.com/show_bug.cgi?id=1985697 Alternative implementations include disabling leader election entirely for SNO-enabled clusters. This implementation is centered around dynamically querying for the Infrastructure/cluster singleton resource, checking the HA/non-HA expectations being exposed, and setting leader election properly. This implementation would still need to be careful about how to handle transient errors and provide an escape hatch (e.g. prefer enablement of leader election through a CLI flag, vs. the dynamic value) that users can pass to the PSM deployment for failed upgrades.
timflannagan
added a commit
to timflannagan/operator-framework-olm
that referenced
this pull request
Jul 27, 2021
Update the package-server-manager controller and update the leader election intervals. This is in order to comply with the need for OCP components to be able to withstand 60s of API server disruption on SNO-enabled clusters. For more information, see the following resources: - openshift/library-go#1104 (comment) - https://bugzilla.redhat.com/show_bug.cgi?id=1985697 Alternative implementations include disabling leader election entirely for SNO-enabled clusters. This implementation is centered around dynamically querying for the Infrastructure/cluster singleton resource, checking the HA/non-HA expectations being exposed, and setting leader election properly. This implementation would still need to be careful about how to handle transient errors and provide an escape hatch (e.g. prefer enablement of leader election through a CLI flag, vs. the dynamic value) that users can pass to the PSM deployment for failed upgrades.
bertinatto
added a commit
to bertinatto/cluster-storage-operator
that referenced
this pull request
Aug 2, 2021
This bump is intended to address the issue that SNO cluster cannot handle 60s of API server communication disruptions. The fix was added in openshift/library-go#1104.
creydr
added a commit
to creydr/cloud-network-config-controller
that referenced
this pull request
Jan 10, 2022
To be able an api server disruptions on SNO, the leader election timeouts needs to be adjusted acording to github.com/openshift/library-go/pull/1104. Signed-off-by: Christoph Stäbler <cstabler@redhat.com>
creydr
added a commit
to creydr/cloud-network-config-controller
that referenced
this pull request
Jan 10, 2022
To be able to handle an api server disruption on SNO, the leader election timeouts needs to be adjusted according to github.com/openshift/library-go/pull/1104. Signed-off-by: Christoph Stäbler <cstabler@redhat.com>
creydr
added a commit
to creydr/cloud-network-config-controller
that referenced
this pull request
Jan 10, 2022
To be able to handle an api server disruption on SNO, the leader election timeouts needs to be adjusted according to github.com/openshift/library-go/pull/1104. Signed-off-by: Christoph Stäbler <cstabler@redhat.com>
This file contains hidden or bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment
3 participants
Add this suggestion to a batch that can be applied as a single commit.This suggestion is invalid because no changes were made to the code.Suggestions cannot be applied while the pull request is closed.Suggestions cannot be applied while viewing a subset of changes.Only one suggestion per line can be applied in a batch.Add this suggestion to a batch that can be applied as a single commit.Applying suggestions on deleted lines is not supported.You must change the existing code in this line in order to create a valid suggestion.Outdated suggestions cannot be applied.This suggestion has been applied or marked resolved.Suggestions cannot be applied from pending reviews.Suggestions cannot be applied on multi-line comments.Suggestions cannot be applied while the pull request is queued to merge.Suggestion cannot be applied right now. Please check back later.
found via openshift/origin#26215
We want to handle 60s of communication disruption in all components.