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feat(greptimedb-standalone): add extra volume mount #187

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merged 1 commit into from
Oct 31, 2024

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@daviderli614 daviderli614 commented Oct 30, 2024

I want to mount tls certificate into the pod.

Summary by CodeRabbit

  • New Features

    • Updated version of the greptimedb-standalone Helm chart to 0.1.28.
    • Added configuration options for extraVolumeMounts and extraVolumes to enhance deployment flexibility.
  • Documentation

    • Updated README to reflect new configuration options and version change.
  • Bug Fixes

    • Improved handling of volume mounts and volumes in the StatefulSet configuration for better usability.

@daviderli614 daviderli614 requested a review from zyy17 October 30, 2024 16:55
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coderabbitai bot commented Oct 30, 2024

Walkthrough

The pull request introduces updates to the greptimedb-standalone Helm chart, primarily incrementing the version from 0.1.27 to 0.1.28 across multiple files. The README.md file has been enhanced with two new configuration options: extraVolumeMounts and extraVolumes. Additionally, the statefulset.yaml file has been modified to support these new options, allowing for conditional inclusion of extra volume mounts and volumes. The values.yaml file has also been updated to define these new fields.

Changes

File Path Change Summary
charts/greptimedb-standalone/Chart.yaml Version updated from 0.1.27 to 0.1.28.
charts/greptimedb-standalone/README.md Version updated from 0.1.27 to 0.1.28. Added extraVolumeMounts and extraVolumes lists.
charts/greptimedb-standalone/templates/statefulset.yaml Added support for extraVolumeMounts and extraVolumes in volume mounts and volumes sections.
charts/greptimedb-standalone/values.yaml Added extraVolumeMounts: [] and extraVolumes: [] fields.

Possibly related PRs

Suggested reviewers

  • zyy17

Poem

🐰 In the meadow, hops a rabbit bright,
With version updates, oh what a delight!
Extra volumes and mounts, now we can share,
Configurations aplenty, with love and care.
Hooray for the changes, let’s cheer and play,
In the world of Helm charts, we’ll dance all day! 🎉


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Actionable comments posted: 0

🧹 Outside diff range and nitpick comments (4)
charts/greptimedb-standalone/README.md (1)

60-61: Documentation needs enhancement for the new volume mount features

While the new configuration options are documented, the entries would benefit from additional details to help users, especially for the TLS certificate mounting use case mentioned in the PR objectives.

Consider adding:

  1. Description of the expected structure for volume configurations
  2. Example configuration for mounting TLS certificates
  3. Reference to Kubernetes documentation

Example enhancement:

-| extraVolumeMounts | list | `[]` | Volume mounts to add to the pods |
-| extraVolumes | list | `[]` | Volumes to add to the pods |
+| extraVolumeMounts | list | `[]` | Additional volume mounts to add to the pods. Follows the Kubernetes [VolumeMount spec](https://kubernetes.io/docs/reference/kubernetes-api/workload-resources/pod-v1/#volumes-1). Example for TLS cert mounting:
+```yaml
+extraVolumeMounts:
+  - name: tls-cert
+    mountPath: /etc/greptimedb/tls
+    readOnly: true
+``` |
+| extraVolumes | list | `[]` | Additional volumes to add to the pods. Follows the Kubernetes [Volume spec](https://kubernetes.io/docs/reference/kubernetes-api/workload-resources/pod-v1/#volumes). Example for TLS cert volume:
+```yaml
+extraVolumes:
+  - name: tls-cert
+    secret:
+      secretName: greptimedb-tls
+``` |
charts/greptimedb-standalone/values.yaml (1)

130-134: LGTM! Consider enhancing the documentation with examples.

The implementation follows Helm chart best practices by allowing flexible configuration through arrays. This change effectively supports the PR objective of mounting TLS certificates.

Consider enhancing the comments with examples and security considerations:

-# -- Volume mounts to add to the pods
+# -- Volume mounts to add to the pods
+# Example for TLS certificate:
+# extraVolumeMounts:
+#   - name: tls-cert
+#     mountPath: /etc/greptimedb/tls
+#     readOnly: true
 extraVolumeMounts: []
-# -- Volumes to add to the pods
+# -- Volumes to add to the pods
+# Example for TLS certificate:
+# extraVolumes:
+#   - name: tls-cert
+#     secret:
+#       secretName: greptimedb-tls
+# Note: Ensure proper RBAC and security contexts when mounting sensitive data
 extraVolumes: []
charts/greptimedb-standalone/templates/statefulset.yaml (2)

126-135: Document security implications of extraVolumes.

The implementation looks good, but since this feature allows mounting arbitrary volumes, it's recommended to document security implications and best practices in the README.

Consider adding a section in the README about:

  • Recommended volume types
  • Security considerations for mounting sensitive data
  • Example configurations for common use cases like TLS certificates

126-126: Consider adding validation for volume types.

The condition if or .Values.configToml .Values.extraVolumes allows the volumes section to be created when only extraVolumes are defined, which is correct. However, consider adding validation to ensure only allowed volume types can be mounted.

You could:

  1. Add a helper template to validate volume types
  2. Document supported volume types in values schema
  3. Add examples in values.yaml for common volume types like:
    • secrets
    • configMaps
    • persistentVolumeClaims
📜 Review details

Configuration used: CodeRabbit UI
Review profile: CHILL

📥 Commits

Reviewing files that changed from the base of the PR and between f465f7d and a3adb49.

📒 Files selected for processing (4)
  • charts/greptimedb-standalone/Chart.yaml (1 hunks)
  • charts/greptimedb-standalone/README.md (2 hunks)
  • charts/greptimedb-standalone/templates/statefulset.yaml (1 hunks)
  • charts/greptimedb-standalone/values.yaml (1 hunks)
✅ Files skipped from review due to trivial changes (1)
  • charts/greptimedb-standalone/Chart.yaml
🔇 Additional comments (2)
charts/greptimedb-standalone/README.md (1)

5-5: LGTM: Version bump is appropriate

The version increment from 0.1.27 to 0.1.28 aligns with semantic versioning for feature additions.

charts/greptimedb-standalone/templates/statefulset.yaml (1)

119-121: LGTM! Implementation follows Helm best practices.

The extra volume mounts implementation is clean and consistent with Kubernetes StatefulSet specifications. The indentation is correct, and the template syntax is proper.

Let's verify the YAML indentation in the values file:

✅ Verification successful

Extra volume mounts configuration is properly structured

The extraVolumeMounts field is correctly defined in values.yaml as an empty array ([]), which is the proper default value for an optional volume mounts array. This matches the template implementation and follows Kubernetes volume mount specifications.

🏁 Scripts executed

The following scripts were executed for the analysis:

Script:

#!/bin/bash
# Description: Verify the extraVolumeMounts structure in values.yaml
# Expect: Array of volumeMount objects with proper indentation

rg -A 5 "extraVolumeMounts:" charts/greptimedb-standalone/values.yaml

Length of output: 187

@zyy17 zyy17 merged commit 8915bf0 into GreptimeTeam:main Oct 31, 2024
3 checks passed
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2 participants