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Switch leader election to endpointleases #662

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merged 1 commit into from
Jan 4, 2022
Merged

Switch leader election to endpointleases #662

merged 1 commit into from
Jan 4, 2022
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acumino
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@acumino acumino commented Dec 22, 2021 •
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/kind enhancement

Which issue(s) this PR fixes:
Part of gardener/gardener#4742

CC: @ialidzhikov

Release note:

The default leader election resource lock of `machine-controller-manager` has been changed from `endpoints` to `endpointsleases`.

Components that deploy the `machine-controller-manager` will now have to adapt the RBAC rules to allow `machine-controller-manager` to maintain its leader election resource lock in `leases` as well.

@acumino acumino requested a review from a team as a code owner December 22, 2021 14:52
@gardener-robot-ci-3 gardener-robot-ci-3 added the reviewed/ok-to-test Has approval for testing (check PR in detail before setting this label because PR is run on CI/CD) label Dec 22, 2021
@gardener-robot-ci-2 gardener-robot-ci-2 added needs/ok-to-test Needs approval for testing (check PR in detail before setting this label because PR is run on CI/CD) and removed reviewed/ok-to-test Has approval for testing (check PR in detail before setting this label because PR is run on CI/CD) labels Dec 22, 2021
@gardener-robot gardener-robot added the kind/enhancement Enhancement, improvement, extension label Dec 22, 2021
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@acumino Thank you for your contribution.

@gardener-robot gardener-robot added needs/review Needs review size/xs Size of pull request is tiny (see gardener-robot robot/bots/size.py) labels Dec 22, 2021
ialidzhikov
ialidzhikov suggested changes Dec 22, 2021
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Generally lgtm, minor nit.

pkg/util/client/leaderelectionconfig/config.go Outdated Show resolved Hide resolved
@ialidzhikov ialidzhikov mentioned this pull request Dec 22, 2021
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@gardener-robot gardener-robot added the needs/changes Needs (more) changes label Dec 22, 2021
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@acumino found that the RBAC under kubernetes/deployment has to be adapted accordingly. Nice catch!

himanshu-kun
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/lgtm
is there a resource by the name endpointsleases also, I can find leases and endpoint resources

@gardener-robot gardener-robot added reviewed/lgtm Has approval for merging and removed needs/changes Needs (more) changes needs/review Needs review labels Dec 22, 2021
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/hold

@gardener-robot gardener-robot added the reviewed/do-not-merge Has no approval for merging as it may break things, be of poor quality or have (ext.) dependencies label Dec 22, 2021
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acumino commented Dec 22, 2021 •
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/lgtm
is there a resource by the name endpointsleases also, I can find leases and endpoint resources

No, we want to migrate from endpoints to leases.
We exactly don't want to change it randomly but in two phases:
(1) acquire old object lock, once acquired, acquire new object lock; only when both acquired we have a lock and can proceed
(2) (next release) since now master has to acquire the lock on the new object (lease) to be master, we can now delete the need to acquire the old object (endpoints or configmap).
And now we're using lease as it should be.

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No, we want to migrate from endpoint to leases.
We exactly don't want to change it randomly but in two phases:
(1) acquire old object lock, once acquired, acquire new object lock; only when both acquired we have a lock and can proceed
(2) (next release) since now master has to acquire the lock on the new object (lease) to be master, we can now delete the need to acquire the old object (endpoints or configmap).
And now we're using lease as it should be.

Thanks @acumino , for the clear explanation:thumbsup:

@acumino acumino force-pushed the migrate_mcm_to_endpoints_lease_lock branch from dadac24 to 1269a19 Compare December 23, 2021 13:58
@gardener-robot gardener-robot added size/s Size of pull request is small (see gardener-robot robot/bots/size.py) and removed size/xs Size of pull request is tiny (see gardener-robot robot/bots/size.py) labels Dec 23, 2021
@gardener-robot-ci-3 gardener-robot-ci-3 added the reviewed/ok-to-test Has approval for testing (check PR in detail before setting this label because PR is run on CI/CD) label Dec 23, 2021
@gardener-robot-ci-1 gardener-robot-ci-1 removed the reviewed/ok-to-test Has approval for testing (check PR in detail before setting this label because PR is run on CI/CD) label Dec 23, 2021
@acumino acumino force-pushed the migrate_mcm_to_endpoints_lease_lock branch from 1269a19 to 7c42765 Compare December 23, 2021 14:19
@gardener-robot-ci-1 gardener-robot-ci-1 added the reviewed/ok-to-test Has approval for testing (check PR in detail before setting this label because PR is run on CI/CD) label Dec 23, 2021
@gardener-robot-ci-3 gardener-robot-ci-3 removed the reviewed/ok-to-test Has approval for testing (check PR in detail before setting this label because PR is run on CI/CD) label Dec 23, 2021
ialidzhikov
ialidzhikov approved these changes Jan 3, 2022
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/lgtm
/unhold

@gardener-robot gardener-robot removed the reviewed/do-not-merge Has no approval for merging as it may break things, be of poor quality or have (ext.) dependencies label Jan 3, 2022
@AxiomSamarth AxiomSamarth merged commit c988f63 into gardener:master Jan 4, 2022
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@acumino can you prepare draft PRs to provider-extensions with the required RBAC changes? Thanks in advance.

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@acumino acumino deleted the migrate_mcm_to_endpoints_lease_lock branch October 10, 2024 07:39
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