Conversation
WalkthroughA new Helm chart named "migrations" has been introduced under the Changes
Sequence Diagram(s)sequenceDiagram
participant User
participant Helm
participant Kubernetes API
participant Secret
participant Database
User->>Helm: Install/Upgrade migrations chart
Helm->>Kubernetes API: Apply Job manifest
Kubernetes API->>Job: Create migration Job
alt waitForDb enabled
Job->>Init Container: Start wait-for-db
Init Container->>Database: Check connectivity (host:port)
Init Container-->>Job: Exit when DB is ready
end
Job->>Migrator Container: Run migration command
Migrator Container->>Secret: Load env vars (DB credentials)
Migrator Container->>Database: Execute migrations
Job-->>Kubernetes API: Complete Job
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Actionable comments posted: 3
🧹 Nitpick comments (8)
charts/migrations/Chart.yaml (2)
3-3: Enhance chart description
Thedescriptionfield is too generic. Consider specifying that this chart runs database migrations, e.g.,description: A Helm chart to run database migrations as a Kubernetes Job
6-7: Add maintainer contact details
Helm best practices recommend including email and/or URL for maintainers to facilitate communication and issue triage. For example:maintainers: - name: "mikolajsobolewski" email: "you@example.com" url: "https://github.com/mikolajsobolewski"charts/migrations/values.yaml (1)
12-13: Consider adding a hook delete policy
You’re using Helm hooks for pre-install and pre-upgrade, but without a delete policy old jobs may linger. You can enhance cleanup by adding:job: annotations: helm.sh/hook: pre-install,pre-upgrade helm.sh/hook-weight: "0" helm.sh/hook-delete-policy: before-hook-creation,hook-succeededThis ensures previous migration jobs are removed before new ones run.
charts/migrations/README.md (2)
11-11: Populate maintainer contact information
The maintainer table omits email and URL. Including these fields helps chart consumers know where to seek support.
33-33: Ensure final newline
Add a newline at the end of the file to adhere to POSIX text file conventions and avoid render inconsistencies.charts/migrations/templates/_helpers.tpl (2)
5-9: Include recommended Kubernetes common labels
Enhance thelabelshelper by adding standard CNCF labels for better metadata consistency, for example:{{- define "migrations.labels" -}} -helm.sh/chart: {{ .Chart.Name }}-{{ .Chart.Version | replace "+" "_" }} -app.kubernetes.io/name: {{ include "migrations.fullname" . }} -app.kubernetes.io/instance: {{ .Release.Name }} +helm.sh/chart: {{ .Chart.Name }}-{{ .Chart.Version | replace "+" "_" }} +app.kubernetes.io/name: {{ include "migrations.fullname" . }} +app.kubernetes.io/instance: {{ .Release.Name }} +app.kubernetes.io/version: {{ .Chart.AppVersion }} +app.kubernetes.io/managed-by: Helm {{- end -}}
15-15: Ensure trailing newline
Add a newline at the end of the file to prevent potential template rendering issues.charts/migrations/templates/job.yaml (1)
35-38: Guard the database secret reference
If.Values.db.secretNameis empty,envFromwill produce invalid YAML. Consider wrapping this block in anifcheck or defaultingdb.secretName: ""to a required non-empty value.Example:
- envFrom: - - secretRef: - name: {{ .Values.db.secretName }} + {{- if .Values.db.secretName }} + envFrom: + - secretRef: + name: {{ .Values.db.secretName }} + {{- end }}
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charts/migrations/.helmignore(1 hunks)charts/migrations/Chart.yaml(1 hunks)charts/migrations/README.md(1 hunks)charts/migrations/templates/_helpers.tpl(1 hunks)charts/migrations/templates/job.yaml(1 hunks)charts/migrations/values.yaml(1 hunks)
🧰 Additional context used
🪛 GitHub Check: test
charts/migrations/values.yaml
[failure] 2-2:
2:17 [trailing-spaces] trailing spaces
🪛 YAMLlint (1.37.1)
charts/migrations/values.yaml
[error] 2-2: trailing spaces
(trailing-spaces)
charts/migrations/templates/job.yaml
[error] 6-6: syntax error: expected the node content, but found '-'
(syntax)
🪛 GitHub Actions: charts/all
charts/migrations/values.yaml
[error] 2-2: trailing spaces detected (trailing-spaces)
🔇 Additional comments (7)
charts/migrations/Chart.yaml (1)
8-8: ReviewappVersionvalue
Using"latest"forappVersionmay not reflect a fixed, repeatable release and can lead to unpredictability. Consider pinning to a specific semantic version or clarifying its intended usage.charts/migrations/templates/job.yaml (6)
1-4: Metadata templating looks solid
The Helm helpers forfullnameandlabelsensure consistent naming and labeling across resources.
5-6: Ignore YAMLlint false-positive on Helm directives
The dash in{{- include ... }}is Helm’s whitespace control and not invalid YAML at render time. To catch real template issues, runhelm lint charts/migrations.🧰 Tools
🪛 YAMLlint (1.37.1)
[error] 6-6: syntax error: expected the node content, but found '-'
(syntax)
7-8: Ensure default annotations are defined
Guard againstnullor empty maps if.Values.job.annotationsisn’t set invalues.yaml. Make sure you defaultjob.annotations: {}invalues.yamlto avoid invalid YAML.
9-10: Dynamic backoffLimit is appropriate
Sourcing.Values.job.backoffLimitlets users tune retry behavior. Good flexibility.
17-20: Image pull secrets support is correct
Thewith .Values.imagePullSecretsblock andtoYamlindentation will render a validimagePullSecretsarray when populated.
25-34: Flexible command handling is well implemented
Supporting both string and list commands covers most use cases. ThekindIs "string"guard and proper indentation viatoYamlwill render validcommand:arrays.
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Actionable comments posted: 1
♻️ Duplicate comments (2)
charts/migrations/templates/job.yaml (2)
39-42: IncludeimagePullPolicyfor thewait-for-dbinitContainer.
To ensure consistent pull behavior (e.g., Always vs IfNotPresent), sourcepullPolicyfrom values. VerifywaitForDb.pullPolicyis defined invalues.yaml.- - name: wait-for-db - image: {{ .Values.waitForDb.image }} + - name: wait-for-db + image: {{ .Values.waitForDb.image }} + imagePullPolicy: {{ .Values.waitForDb.pullPolicy }}
9-10: 🛠️ Refactor suggestionAdd TTL for automatic Job cleanup.
Completed or failed Jobs can accumulate indefinitely. IntroducettlSecondsAfterFinishedat the Job spec level to automatically purge old Job resources. Ensure you define a default invalues.yamlunderjob.ttlSecondsAfterFinished.spec: backoffLimit: {{ .Values.job.backoffLimit }} + ttlSecondsAfterFinished: {{ .Values.job.ttlSecondsAfterFinished }} template:
🧹 Nitpick comments (2)
charts/migrations/templates/job.yaml (2)
7-8: Conditionalize the annotations block.
If.Values.job.annotationsis empty or undefined, the renderedannotations:key will be left dangling, leading to invalid YAML. Wrap it in awithto render only when annotations are provided.- annotations: - {{- toYaml .Values.job.annotations | nindent 4 }} + {{- with .Values.job.annotations }} + annotations: + {{ toYaml . | nindent 4 }} + {{- end }}
21-24: Consider adding resource requests and limits.
It’s best practice to allow users to configure resourcerequestsandlimitsfor the migrator container to guard against noisy neighbors and ensure scheduling. For example:containers: - name: migrator image: "{{ .Values.image.repository }}:{{ .Values.image.tag }}" imagePullPolicy: {{ .Values.image.pullPolicy }} + resources: + {{ toYaml .Values.resources | nindent 12 }}Ensure you define sensible defaults for
resourcesinvalues.yaml.
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- charts/migrations/values.yaml
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🪛 YAMLlint (1.37.1)
charts/migrations/templates/job.yaml
[error] 6-6: syntax error: expected the node content, but found '-'
(syntax)
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Actionable comments posted: 0
♻️ Duplicate comments (1)
charts/migrations/templates/job.yaml (1)
5-6:⚠️ Potential issueFix YAML syntax error in labels block
The leading dash in theincludedirective trims the preceding newline, causing a YAML syntax error during rendering. Remove the dash to preserve the required newline before the labels.- labels: - {{- include "migrations.labels" . | nindent 4 }} + labels: + {{ include "migrations.labels" . | nindent 4 }}🧰 Tools
🪛 YAMLlint (1.37.1)
[error] 6-6: syntax error: expected the node content, but found '-'
(syntax)
🧹 Nitpick comments (1)
charts/migrations/templates/job.yaml (1)
13-14: Optional: Consistent whitespace control for selector labels
Similarly, consider removing the leading dash in theselectorLabelsinclude to avoid trimming the newline and ensure proper indenting:- labels: - {{- include "migrations.selectorLabels" . | nindent 8 }} + labels: + {{ include "migrations.selectorLabels" . | nindent 8 }}
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charts/migrations/Chart.yaml(1 hunks)charts/migrations/README.md(1 hunks)charts/migrations/templates/job.yaml(1 hunks)charts/migrations/values.yaml(1 hunks)
✅ Files skipped from review due to trivial changes (1)
- charts/migrations/README.md
🚧 Files skipped from review as they are similar to previous changes (2)
- charts/migrations/Chart.yaml
- charts/migrations/values.yaml
🧰 Additional context used
🪛 YAMLlint (1.37.1)
charts/migrations/templates/job.yaml
[error] 6-6: syntax error: expected the node content, but found '-'
(syntax)
🔇 Additional comments (2)
charts/migrations/templates/job.yaml (2)
39-42: Image pull policy added to initContainer
Great job addingimagePullPolicyfor thewait-for-dbinitContainer to ensure consistent pull behavior.
52-53: Automatic Job cleanup enabled
The addition ofttlSecondsAfterFinishedis spot on for cleaning up succeeded or failed Jobs automatically.
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Actionable comments posted: 0
♻️ Duplicate comments (1)
charts/migrations/templates/job.yaml (1)
5-6: Fix YAML syntax error in the labels section.
The leading dash in the include directive strips the required newline and leads to a linter error. Change:- labels: - {{- include "migrations.labels" . | nindent 4 }} + labels: + {{ include "migrations.labels" . | nindent 4 }}🧰 Tools
🪛 YAMLlint (1.37.1)
[error] 6-6: syntax error: expected the node content, but found '-'
(syntax)
🧹 Nitpick comments (3)
charts/migrations/templates/job.yaml (3)
7-8: Preserve indentation when rendering annotations.
Using{{- toYaml ... }}strips the leading whitespace and may produce invalid YAML if the block is empty. It’s safer to use:- annotations: - {{- toYaml .Values.job.annotations | nindent 4 }} + annotations: + {{ toYaml .Values.job.annotations | nindent 4 }}
9-15: Consider explicit selector and runtime bounds.
Currently the Job relies on default selectors and has no timeout guard. You could add:spec: selector: matchLabels: {{ include "migrations.selectorLabels" . | nindent 6 }} activeDeadlineSeconds: {{ .Values.job.activeDeadlineSeconds }} backoffLimit: {{ .Values.job.backoffLimit }}—where
job.activeDeadlineSecondsis added tovalues.yaml. This locks down the Pod selector and bounds the job duration.
65-67: Separate resources for the init container.
Both the migrator and the wait-for-db initContainer share.Values.resources. Consider a dedicated.Values.waitForDb.resourcesblock so you can tune the readiness probe separately:initContainers: - name: wait-for-db ... - resources: - {{- toYaml .Values.resources | nindent 12 }} + resources: + {{- toYaml .Values.waitForDb.resources | nindent 12 }}
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🚧 Files skipped from review as they are similar to previous changes (2)
- charts/migrations/values.yaml
- charts/migrations/README.md
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🪛 YAMLlint (1.37.1)
charts/migrations/templates/job.yaml
[error] 6-6: syntax error: expected the node content, but found '-'
(syntax)
🔇 Additional comments (3)
charts/migrations/templates/job.yaml (3)
26-38: Main container configuration looks solid.
Good use ofimagePullPolicy, conditionalcmdhandling, and templated resource injection.
45-63: DB readiness initContainer is well-implemented.
The retry loop with a configurablemax_attempts, a clear failure path, and feedback logs is robust. IncludingimagePullPolicyfor consistency is also good.
68-69: Automatic cleanup TTL is configured correctly.
ThettlSecondsAfterFinishedat the Job spec level will ensure completed or failed jobs don’t linger.
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