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Contributing

Argo Helm is a collection of community maintained charts. Therefore we rely on you to test your changes sufficiently.

Pull Requests

All submissions, including submissions by project members, require review. We use GitHub pull requests for this purpose. Consult GitHub Help for more information on using pull requests. See the above stated requirements for PR on this project.

Versioning

Each chart's version follows the semver standard. New charts should start at version 1.0.0, if it's considered stable. If it's not considered stable, it must be released as prerelease.

Any breaking changes to a chart (backwards incompatible) require:

  • Bump of the current Major version of the chart
  • State possible manual changes for this chart version in the Upgrading section of the chart's README.md.gotmpl (See Upgrade)

Immutability

Each release for each chart must be immutable. Any change to a chart (even just documentation) requires a version bump. Trying to release the same version twice will result in an error.

Artifact Hub Annotations

Since we release our charts on Artifact Hub we encourage making use of the provided chart annotations for Artifact Hub.

Changelog

We want to deliver transparent chart releases for our chart consumers. Therefore we require a changelog per new chart release.

Changes on a chart must be documented in a chart specific changelog in the Chart.yaml Annotation Section. For every new release the entire artifacthub.io/changes needs to be rewritten. Each change requires a new bullet point following the pattern - "[{type}]: {description}". You can use the following template:

name: argo-cd
version: 3.4.1
...
annotations:
  artifacthub.io/changes: |
    - "[Added]: Something New was added"
    - "[Changed]: Changed Something within this chart"
    - "[Changed]: Changed Something else within this chart"
    - "[Deprecated]: Something deprecated"
    - "[Removed]: Something was removed"
    - "[Fixed]: Something was fixed"
    - "[Security]": Some Security Patch was included"

Documentation

The documentation for each chart is done with helm-docs. This way we can ensure that values are consistent with the chart documentation.

We have a script on the repository which will execute the helm-docs docker container, so that you don't have to worry about downloading the binary etc. Simply execute the script (Bash compatible, might require sudo privileges):

bash scripts/helm-docs.sh

NOTE: When creating your own README.md.gotmpl, don't forget to add it to your .helmignore file.

Testing

Testing Argo Workflows Changes

Minimally:

helm install charts/argo-workflows -n argo
argo version

Follow this instructions for running a hello world workflow.

Testing Argo CD Changes

Clean-up:

helm delete argo-cd --purge
kubectl delete crd -l app.kubernetes.io/part-of=argocd

Pre-requisites:

helm repo add redis-ha https://dandydeveloper.github.io/charts/
helm dependency update

Minimally:

helm install charts/argo-cd --namespace argocd -n argo-cd
kubectl port-forward service/argo-cd-argocd-server -n argocd 8080:443

In a new terminal:

argocd version --server localhost:8080 --insecure
# reset password to 'Password1!'
kubectl -n argocd patch secret argocd-secret \
  -p '{"stringData": {
    "admin.password": "$2a$10$hDj12Tw9xVmvybSahN1Y0.f9DZixxN8oybyA32Uy/eqWklFU4Mo8O",
    "admin.passwordMtime": "'$(date +%FT%T%Z)'"
  }}'
argocd login localhost:8080 --username admin --password 'Password1!'

# WARNING: server certificate had error: x509: certificate signed by unknown authority. Proceed insecurely (y/n)? y

Create and sync app:

argocd app create guestbook --dest-namespace default --dest-server https://kubernetes.default.svc --path guestbook --project default --repo https://github.com/argoproj/argocd-example-apps.git
argocd app sync guestbook

New Application Versions

When raising application versions ensure you make the following changes:

  • values.yaml: Bump all instances of the container image version
  • Chart.yaml: Ensure appVersion matches the above container image and bump version

Please ensure chart version changes adhere to semantic versioning standards:

  • Patch: App version patch updates, backwards compatible optional chart features
  • Minor: New chart functionality (sidecars), major application updates or minor non-backwards compatible changes
  • Major: Large chart rewrites, major non-backwards compatible or destructive changes

Testing Charts

As part of the Continuous Integration system we run Helm's Chart Testing tool.

The checks for this tool are stricter than the standard Helm requirements, where fields normally considered optional like maintainer are required in the standard spec and must be valid GitHub usernames.

Linting configuration can be found in ct-lint.yaml

The linting can be invoked manually with the following command:

./scripts/lint.sh

Publishing Changes

Changes are automatically publish whenever a commit is merged to main. The CI job (see ./.github/workflows/publish.yml).