fix: lowercase CleanStringForDNS output for RFC 1123 compliance#228
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carlydf merged 1 commit intotemporalio:mainfrom Mar 18, 2026
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Kubernetes resource names must conform to RFC 1123 DNS labels, which require lowercase characters. CleanStringForDNS strips invalid characters but does not lowercase the result, causing deployment creation to fail when the image tag contains uppercase characters (e.g. "master--HEAD"). This adds strings.ToLower() to CleanStringForDNS so that ComputeVersionedDeploymentName always produces valid DNS labels. Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
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carlydf
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Mar 18, 2026
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Summary
CleanStringForDNSstrips invalid characters but does not lowercase the result. When an image tag contains uppercase characters (e.g.myimage:master--HEAD),ComputeVersionedDeploymentNameproduces a deployment name that violates RFC 1123 DNS label rules, causing Kubernetes to reject the Deployment.This adds
strings.ToLower()toCleanStringForDNSso deployment names are always valid DNS labels.Why
CleanStringForDNSand notcleanBuildID?The build ID is also used as a Kubernetes label value and as the Temporal worker build ID. Labels allow uppercase (
[a-zA-Z0-9._-]), and Temporal build IDs just need to be ASCII. Lowercasing only inCleanStringForDNSkeeps the fix scoped to where DNS compliance is required (resource names) without affecting label values or Temporal version matching.