https://github.com/nlewo/poc-tekton

https://github.com/nlewo/poc-tekton

Last synced: 12 days ago
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• Host: GitHub
• URL: https://github.com/nlewo/poc-tekton
• Owner: nlewo
• License: mit
• Created: 2019-09-26T07:13:09.000Z (about 5 years ago)
• Default Branch: master
• Last Pushed: 2019-11-27T14:01:18.000Z (almost 5 years ago)
• Last Synced: 2024-10-13T02:10:52.395Z (26 days ago)
• Language: Go
• Size: 150 KB
• Stars: 5
• Watchers: 4
• Forks: 1
• Open Issues: 1
• Metadata Files:
  • Readme: README.md
  • License: LICENSE

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README

        
This is an experimental project with Tekton and Nix.

The goal is to define a Pipeline to build and deploy a Go application.

### Requirements

- A Kubernetes cluster

- Tekton Pipelines is already deployed

- Tekton Triggers is already deployed (for webhook handling)

### Getting Started

#### Deploy tasks

We first need to deploy some tasks

```

$ kubectl apply -f ci/task-build-docker-image.yaml

$ kubectl apply -f ci/task-check-deploy.yaml

```

We then need to add a task to update the digest resource. This is a

workaround (see https://github.com/tektoncd/catalog/pull/68 and

https://github.com/tektoncd/pipeline/issues/216)

```

$ kubectl apply -f https://raw.githubusercontent.com/tektoncd/catalog/0b48da8e336a4214aff46af242658dc056199b1c/update-image-digests/image-digest-updater.yaml

$ kubectl apply -f https://raw.githubusercontent.com/tektoncd/catalog/0b48da8e336a4214aff46af242658dc056199b1c/update-image-digests/update-image-digests.yaml

```

#### Deploy and run the pipeline

We can now create the pipeline:

```

$ kubectl apply -f ci/build-deploy-pipeline.yaml

```

To push to an authenticated registry, we need to expose a Docker

`config.json` file to `n2k8s`. See

https://github.com/nlewo/n2k8s#authentication for details.

```

$ kubectl create configmap docker-config --from-file=~/.docker/config.json

```

We can finally run the Pipeline:

```

$ kubectl apply -f ci/hello-world-pipeline-run.yaml

```

#### Display logs

To display the logs of the Pipeline run with the Tekton CLI:

```

$ tkn pipelinerun logs hello-world-pipeline-run -f

```

At the end, we should be able to get a http respond from the web

application:

```

$ curl $(kubectl get svc hello-world -o jsonpath="{.status.loadBalancer.ingress[*].hostname}")

hello world

```

#### Enable webhook (triggers)

First an eventlistener must be created. This listener has a public IP which

will be used when configuring the github webhook. A secret is set on webhook creation

so that the incoming events can be validated by tekton. The webhook secret is also stored

in a k8s secret.

The secret is validated with a tekton task which needs to be installed.

```

$ kubectl apply -f ci/eventlistener.yaml

$ sed 's/GITHUB_WEBHOOK_TOKEN/secret/' ci/hello-world-webook-secret.yaml | kubectl apply -f -

$ kubectl apply -f ci/task-validate-github-event.yaml

```

Finally the trigger bindings and templates:

```

$ kubectl apply -f ci/triggerbinding-github.yaml

$ kubectl apply -f ci/hello-world-triggertemplate.yaml

```

When a github event is received by the `eventlistener` it is first validated by

the `validate-github-event` task. Then the `triggerbinding` binds some of the

event values to params which are given to the `triggertemplate`.

The `triggertemplate` defines the list of resources to be created in our case a

`pipelinerun` for the hello-world project.