Chart: opt-in service account and pod labels - #303
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serviceAccount.name renders serviceAccountName on the pod spec. podLabels adds labels to the pod template only, never the selector, with every value quoted. Both are empty by default, so the default render is byte-identical to before. This lets a release run as an existing ServiceAccount bound to an Azure Workload Identity (serviceAccount.name plus the azure.workload.identity/use pod label) without a Helm post-renderer. Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01Umepkp3PVYEjJSi9v3j9Xs
📝 SummarySummary
Risk: Security-sensitive areas: Pod identity configuration. The chart can now reference an existing ServiceAccount and apply identity-related pod labels. The change does not create or modify ServiceAccounts. Test coverage impact: Verification covers ingress and Gateway API modes, default rendering, selector isolation, linting, mutation checks, and semantic equivalence with the existing deployment workflow. Unset values preserve the existing rendered output. Operational concerns: Existing deployments require no migration when values remain unset. Set WalkthroughThe Helm chart adds optional configuration for an existing pod ServiceAccount and additional pod-template labels. The Deployment template renders these values, and the README documents their use. ChangesChart pod settings
Priority: ⬇️ Low Estimated code review effort: 2 (Simple) | ~10 minutes Change: Feature Suggested labels: Suggested reviewers: Merge Risk: 🔵 Low · up to Some valid or documented configurations can fail deployment or omit workload identity labeling. The risks are bounded but should be corrected before release. 🚥 Pre-merge checks | ✅ 5✅ Passed checks (5 passed)
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Actionable comments posted: 3
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Inline comments:
In `@charts/default/README.md`:
- Line 90: Quote the complete --set argument in the podLabels examples so the
escaped label key reaches Helm unchanged. Update charts/default/README.md lines
90-90 and charts/default/values.yaml lines 119-119 consistently; no other
changes are needed.
In `@charts/default/templates/deployment.yaml`:
- Line 30: Update the deployment template’s serviceAccountName field to render
the configured value as a quoted YAML string, preserving valid ServiceAccount
names such as numeric-only values.
- Around line 23-25: Update the podLabels rendering loop to reject reserved keys
app and release using Helm’s fail function before emitting each label. Preserve
rendering for all other keys and report which reserved key was attempted.
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charts/default/README.mdcharts/default/templates/deployment.yamlcharts/default/values.yaml
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Review Helm chart changes for insecure defaults, exposed services, missing resource limits, unsafe templating, and production-impacting value changes.
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Files:
charts/default/README.mdcharts/default/templates/deployment.yamlcharts/default/values.yaml
🪛 Trivy (0.74.0)
charts/default/templates/deployment.yaml
[warning] 28-131: Can elevate its own privileges
Container 'bitween' of Deployment 'bitween' should set 'securityContext.allowPrivilegeEscalation' to false
Rule: KSV-0001
(IaC/Kubernetes)
[info] 28-131: Default capabilities: some containers do not drop all
Container 'bitween' of Deployment 'bitween' should add 'ALL' to 'securityContext.capabilities.drop'
Rule: KSV-0003
(IaC/Kubernetes)
[info] 28-131: Default capabilities: some containers do not drop any
Container 'bitween' of 'deployment' 'bitween' in 'default' namespace should set securityContext.capabilities.drop
Rule: KSV-0004
(IaC/Kubernetes)
[info] 28-131: CPU not limited
Container 'bitween' of Deployment 'bitween' should set 'resources.limits.cpu'
Rule: KSV-0011
(IaC/Kubernetes)
[warning] 28-131: Runs as root user
Container 'bitween' of Deployment 'bitween' should set 'securityContext.runAsNonRoot' to true
Rule: KSV-0012
(IaC/Kubernetes)
[error] 28-131: Root file system is not read-only
Container 'bitween' of Deployment 'bitween' should set 'securityContext.readOnlyRootFilesystem' to true
Rule: KSV-0014
(IaC/Kubernetes)
[info] 28-131: CPU requests not specified
Container 'bitween' of Deployment 'bitween' should set 'resources.requests.cpu'
Rule: KSV-0015
(IaC/Kubernetes)
[info] 28-131: Memory requests not specified
Container 'bitween' of Deployment 'bitween' should set 'resources.requests.memory'
Rule: KSV-0016
(IaC/Kubernetes)
[info] 28-131: Memory not limited
Container 'bitween' of Deployment 'bitween' should set 'resources.limits.memory'
Rule: KSV-0018
(IaC/Kubernetes)
[info] 28-131: Runs with UID <= 10000
Container 'bitween' of Deployment 'bitween' should set 'securityContext.runAsUser' > 10000
Rule: KSV-0020
(IaC/Kubernetes)
[info] 28-131: Runs with GID <= 10000
Container 'bitween' of Deployment 'bitween' should set 'securityContext.runAsGroup' > 10000
Rule: KSV-0021
(IaC/Kubernetes)
[info] 28-131: Runtime/Default Seccomp profile not set
Either Pod or Container should set 'securityContext.seccompProfile.type' to 'RuntimeDefault'
Rule: KSV-0030
(IaC/Kubernetes)
[warning] 28-131: Seccomp policies disabled
container "bitween" of deployment "bitween" in "default" namespace should specify a seccomp profile
Rule: KSV-0104
(IaC/Kubernetes)
[info] 28-131: Container capabilities must only include NET_BIND_SERVICE
container should drop all
Rule: KSV-0106
(IaC/Kubernetes)
[error] 28-131: Default security context configured
container bitween in default namespace is using the default security context
Rule: KSV-0118
(IaC/Kubernetes)
[error] 26-131: Default security context configured
deployment bitween in default namespace is using the default security context, which allows root privileges
Rule: KSV-0118
(IaC/Kubernetes)
[warning] 28-131: Restrict container images to trusted registries
Container bitween in deployment bitween (namespace: default) uses an image from an untrusted registry.
Rule: KSV-0125
(IaC/Kubernetes)
🪛 YAMLlint (1.37.1)
charts/default/templates/deployment.yaml
[error] 24-24: syntax error: could not find expected ':'
(syntax)
A numeric-looking ServiceAccount name such as 123 rendered as a YAML integer, which the API rejects. The podLabels keys app, draft and release duplicated the chart's own pod labels without any render or lint error. app and release are also the selector labels. The chart now fails with a clear message instead. The podLabels examples now quote the --set argument, so the escaped dots survive the shell. Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01Umepkp3PVYEjJSi9v3j9Xs
* feat(chart): opt-in serviceAccount.name and podLabels serviceAccount.name renders serviceAccountName on the pod spec. podLabels adds labels to the pod template only, never the selector, with every value quoted. Both are empty by default, so the default render is byte-identical to before. This lets a release run as an existing ServiceAccount bound to an Azure Workload Identity (serviceAccount.name plus the azure.workload.identity/use pod label) without a Helm post-renderer. Claude-Session: https://claude.ai/code/session_01Umepkp3PVYEjJSi9v3j9Xs * fix(chart): quote serviceAccountName and reject reserved podLabels keys A numeric-looking ServiceAccount name such as 123 rendered as a YAML integer, which the API rejects. The podLabels keys app, draft and release duplicated the chart's own pod labels without any render or lint error. app and release are also the selector labels. The chart now fails with a clear message instead. The podLabels examples now quote the --set argument, so the escaped dots survive the shell. Claude-Session: https://claude.ai/code/session_01Umepkp3PVYEjJSi9v3j9Xs --------- (cherry picked from commit 7f93814) Co-authored-by: Claude Opus 5 (1M context) <noreply@anthropic.com>
1 participant
What
Two opt-in values on the
bitweenchart (charts/default):serviceAccount.name''serviceAccountNameon the pod spec. The chart doesn't create the ServiceAccount.podLabels{}Both are empty by default, so nothing changes for anyone who doesn't set them. The default render is byte-identical to
releases/r10.0, in both ingress and Gateway API mode.Why
GIG runs bitween in AKS with a password-less database login through Azure Workload Identity. The pod needs two things:
serviceAccountName: apdb-sa, and the pod labelazure.workload.identity/use: "true". The chart renders neither.GIG's deploy workflow already passes
serviceAccount.nameandpodLabels, but the chart ignores them. It injects both with a Python--post-rendereron Helm 3.12 instead. That blocks moving the deploy onto the org's deploy-only workflowhelm-deploy-values.yml: the workflow runs Helm 4, and Helm 4 only accepts post-renderer plugins. The existing script is rejected withplugin … not found.With this change, the keys GIG already passes take effect, and the post-renderer can go.
Verification
Tests were rendered locally with Helm v4.2.4.
gateway.enabled=true)serviceAccount.name=apdb-sarendersserviceAccountName: apdb-sapodLabels.azure\.workload\.identity/use=truerenders the label as the string"true"spec.selectorand the Deployment's own labelsserviceAccount.namerenders noserviceAccountNamehelm lintpasses with both values set123) renders as a string, with--setand--set-stringpodLabels.app,podLabels.draftandpodLabels.releasefail the render with a clear errorTests failed first. Before the change, T2, T3 and T6 failed (
null/!!null), and the other tests passed. T8 and T9 were added for the review findings. Before the fix they failed: T8 rendered!!int 123, and T9 rendered duplicate keys with exit 0.Mutation checks. Six deliberate breakages were each caught by the expected test:
serviceAccountNameblock (T2, T6, T8)serviceAccountName(T8)End-to-end. GIG staging's values were rendered two ways:
helm-deploy-values.ymland the sharedhelm-deployaction, using this branch's chartThe two renders are semantically identical across the Secret, Service, Deployment and Ingress.
Release impact
releases/r10.0runs the usual release: a new10.0.ximage and chart go to GHCR and ChartMuseum, and the release deploys toplayground.traxis-infolinkandgig-insureapp-bitween-api) don't set the new values, so their renders don't change (T1).Rollback
Revert this commit. Only releases that set the new values depend on it.
After merge
gig-insureapp-bitween-apimoves tohelm-deploy-values.ymlin a separate PR, and drops its post-renderer.🤖 Generated with Claude Code
https://claude.ai/code/session_01Umepkp3PVYEjJSi9v3j9Xs