Add MaxSurge and MaxUnavailable strategy to all Loki k8 workloads.
#5227
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This fixes couple of issues. 1. By default these configs are 25% in k8, meaning during rollout 25% of pods are allowed to shutdown immediately. 2. Due to (1), during graceful shutdown process, 25% of all the pods access consul to `unregister()` from shared key value. (2) makes CAS rate of underlying KV store high (leads to lots of retry and failing) sometimes failing to unregister leaving the ring "unhealthy" Also this PR make these configs consistent across all k8 workloads. More details: grafana/dskit#117
DylanGuedes
approved these changes
Jan 24, 2022
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| statefulSet.mixin.spec.strategy.rollingUpdate.withMaxSurge(0) + | ||
| statefulSet.mixin.spec.strategy.rollingUpdate.withMaxUnavailable(1) |
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maxSurge and maxUnavailable are not supported by statefulset. There is an open proposal to add support for maxUnavailable to statefulsets and maxSurge would not work with statefulset as per comment which makes sense.
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good catch @sandeepsukhani . Fixed 👍
Signed-off-by: Kaviraj <kavirajkanagaraj@gmail.com>
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What this PR does / why we need it:
This PR makes two changes.
MaxSurge:5andMaxUnavailable:1for all the stateless workloadsMaxSurge:0andMaxUnavailable:1for all the stateful workloadsThis fixes couple of issues.
unregister()from shared key value.(2) makes CAS rate of underlying KV store high (leads to lots of retry and failing) sometimes failing to unregister leaving the ring "unhealthy"
Also this PR make these configs consistent across all k8 workloads.
More details: grafana/dskit#117
Which issue(s) this PR fixes:
Fixes #5191
Special notes for your reviewer:
Checklist
CHANGELOG.mdabout the changes.