setup-tektoncd

Action to rollout Tekton Pipeline, CLI (tkn) and a Container-Registry instance, setting up the environment for testing using these components.

GitHub Action Usage

Example usage below with inputs using default values:

---
jobs:
  setup-tektoncd:
    steps:
      # using KinD to provide the Kubernetes instance and kubectl
      - uses: helm/[email protected]
        with:
          cluster_name: kind

      # setting up Tekton Pipelines, CLI and additional components...
      - uses: openshift-pipelines/setup-tektoncd@v1
        with:
          pipeline_version: latest
          feature_flags: '{}'
          cli_version: latest
          setup_registry: "true"
          patch_etc_hosts: "true"

The action uses the current Kubernetes instance available (KinD for example), thus requires kubectl on the ${PATH}.

Inputs

Input	Required	Description
pipeline_version	false	Tekton Pipeline version
feature_flags	false	Tekton Pipeline feature flags (JSON) payload
cli_version	false	Tekton CLI (tkn) version
setup_registry	false	Rollout a Container-Registry (v2)
patch_etc_hosts	false	Add Container-Registry hostname to /etc/hosts

Components

Tekton Pipelines

Tekton Pipelines is deployed on the namespace tekton-pipelines and the involved deployments are followed until completion, so the setup process waits until the instances are available and in case of error the workflow is interrupted.

Feature-Flags

Tekton Pipelines exposes feature-flags using a ConfigMap named feature-flags. These flags can be set using the the input feature_flags, a JSON formated string containing the the respective flags and values. For example:

---
jobs:
  setup-tektoncd:
    steps:
      - uses: openshift-pipelines/setup-tektoncd@v1
        with:
          feature_flags: '{ "enable-custom-tasks": "true" }'

The result is observed on the following example:

$ kubectl --namespace=tekton-pipelines get configmap feature-flags --output=json |jq '.data'
{
  // ...
  "enable-custom-tasks": "true",
  // ...
}

CLI (tkn)

Tekton CLI is installed on /usr/local/bin directory and uses the same Kubernetes context than kubectl.

Container-Registry

A Container-Registry instance is deployed on the registry namespace using the same rollout approach than Tekton Pipelines.

The registry is available on port 32222 and uses the Kubernetes internal service hostname, registry.registry.svc.cluster.local, which means the fully qualified container images (plus tag) will look like the example below:

registry.registry.svc.cluster.local:32222/namespace/project:tag

The registry does not require authentication, uses HTTP protocol, is available outside of the Kubernetes instance as well. The Action Input patch_etc_hosts makes the registry hostname resolve to 127.0.0.1 and the service exposes the port 32222 as a hostPort too.

Scripts

Alternatively, you can run the scripts directly to rollout Tekton Pipelines and the other components, the recommended approach is using a .env file with the required inputs.

cat >.env <<EOS
export INPUT_PIPELINE_VERSION="latest"
export INPUT_CLI_VERSION="latest"
export INPUT_FEATURE_FLAGS='{ "enable-custom-tasks": "true" }'
EOS

There are shell plugins to automatically load the .env file, once the required environment variables are set you can invoke each script individually:

source .env

./install-pipeline.sh
./install-registry.sh

sudo ./install-cli.sh

The script name reflects the component deployed and they are idempotent, you can run them more than once without side effects.