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Set vttablet init container resource requests and limits #370

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merged 2 commits into from
Feb 2, 2023

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Description

This is just a cherry-pick of #256. It also addresses the review comments in that PR. Please look at #256 for the full description.

Related Issues

brandt and others added 2 commits February 2, 2023 16:37
Sets the resource requirements on each of the default vttablet init containers to the same request and limit values as the vttablet container itself.

This fixes the issue reported in #212 where pods would fail to be created on clusters with strict quota requirements because no limit was set on the init containers.

## History

This is a reimplementation of #216 with the change that it no longer sets a default resource _limit_.

This fixes the issue reported in #240 and discussed in #244 where the vttablet pod would fail to be created when the user sets a request larger than the default limit without also setting a larger limit. The user's nil limit would not override the default value because `update.ResourceRequirements(dst, src)` won't update `dst` with a nil `src` ([for good reasons](https://github.com/planetscale/vitess-operator/blob/da7efd4c945193864f5996cb793055449c4de97a/pkg/operator/update/podspec.go#L201-L203)).

With this change, users can once again increase the request by itself. If a cluster requires a limit, the user will already need to have set it on for vttablet so we can use the same value to override the init containers' default nil limit.

fixes #212
fixes #240

Signed-off-by: J. Brandt Buckley <brandt@runlevel1.com>
Signed-off-by: Manan Gupta <manan@planetscale.com>
@GuptaManan100 GuptaManan100 merged commit 9c0e6a8 into main Feb 2, 2023
@GuptaManan100 GuptaManan100 deleted the fix-vttablet-init-resources branch February 2, 2023 14:46
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initContainer defaults preventing existing YAML from working Ability to define resources for init containers
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