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🐛 Improve webhook CA CertPool handling#1473

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bryanv wants to merge 1 commit intovmware-tanzu:mainfrom
bryanv:bryanv/webhook-verify-client-cert-fixes
Open

🐛 Improve webhook CA CertPool handling#1473
bryanv wants to merge 1 commit intovmware-tanzu:mainfrom
bryanv:bryanv/webhook-verify-client-cert-fixes

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@bryanv
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@bryanv bryanv commented Feb 20, 2026

What does this PR do, and why is it needed?

There was a potential race around the CA CertPool that we're using to validate the webhook requests. The global var that has the cert pool may not have been fully initialized before another request would use it.

Also to help debug any failures, dump the client cert when this does fail.

Which issue(s) is/are addressed by this PR? (optional, in fixes #<issue number>(, fixes #<issue_number>, ...) format, will close the issue(s) when PR gets merged):

Fixes #

Are there any special notes for your reviewer:

Please add a release note if necessary:

NONE

@github-actions github-actions bot added the size/M Denotes a PR that changes 30-99 lines. label Feb 20, 2026
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Looks good to me, thank you for adding the extra log to capture the rejected certificate!

There was a potential race around the CA CertPool that we're using
to validate the webhook requests. I doubt we were actually hitting
this but we have very sporadic reports of this failing.

Also to help debug any failures, dump the client cert when this
does fail.
@bryanv bryanv force-pushed the bryanv/webhook-verify-client-cert-fixes branch from 952a4c1 to c1cb830 Compare February 20, 2026 21:50
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Code Coverage

Package Line Rate Health
github.com/vmware-tanzu/vm-operator/controllers/contentlibrary/clustercontentlibraryitem 67%
github.com/vmware-tanzu/vm-operator/controllers/contentlibrary/contentlibraryitem 67%
github.com/vmware-tanzu/vm-operator/controllers/contentlibrary/utils 46%
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github.com/vmware-tanzu/vm-operator/controllers/infra/secret 76%
github.com/vmware-tanzu/vm-operator/controllers/infra/validatingwebhookconfiguration 87%
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github.com/vmware-tanzu/vm-operator/controllers/storage/storageclass 96%
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github.com/vmware-tanzu/vm-operator/controllers/virtualmachine/volume 86%
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github.com/vmware-tanzu/vm-operator/controllers/virtualmachinegrouppublishrequest 88%
github.com/vmware-tanzu/vm-operator/controllers/virtualmachineimagecache 88%
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github.com/vmware-tanzu/vm-operator/webhooks/virtualmachinepublishrequest/validation 93%
github.com/vmware-tanzu/vm-operator/webhooks/virtualmachinereplicaset/validation 90%
github.com/vmware-tanzu/vm-operator/webhooks/virtualmachineservice/mutation 67%
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github.com/vmware-tanzu/vm-operator/webhooks/virtualmachinesetresourcepolicy/validation 89%
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github.com/vmware-tanzu/vm-operator/webhooks/virtualmachinewebconsolerequest/validation 92%
Summary 83% (18480 / 22342)

Minimum allowed line rate is 79%

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