Add Tekton charts into ks-devops

[wujiahao15]

Integrate Tekton into ks-devops by adding chart installation in charts/ks-devops/charts/

/ospp-2021

[LinuxSuRen]

/label ospp-2021

[JohnNiang]

Is this a duplicated issue? See also #46 .

[LinuxSuRen]

IMO, this is not a duplicated issue. This issue should be part of #46. Add a helm chart for Tekton cannot support Tekton.

[LinuxSuRen]

/label ospp-2021

[wujiahao15]

/assign flamywhale

[JohnNiang]

IMO, this is not a duplicated issue. This issue should be part of #46. Add a helm chart for Tekton cannot support Tekton.

IMO, I suggest that we are supposed to reference issue #46 in PR description. So we can keep track of the tekton integration progress.

[LinuxSuRen]

Please don't forget this program will last three months. It's reasonable to create a bunch of issues to track the process.

I didn't get your point from the following statement. I guess @flamywhale will create a bunch of PRs instead of one PR.

reference issue #46 in PR description

[wujiahao15]

Status quo

After conducting research about the tekton pipeline chart, I find that Tekton Pipelines now has an official helm chart repository called tekton-helm-chart under the CDF organization. In this case, we just need two steps to deploy tekton in the tekton-pipelines namespace of the kubernetes cluster:

1. Add the tekton helm chart repository: helm repo add cdf https://cdfoundation.github.io/tekton-helm-chart/
2. Install it: helm install tekton cdf/tekton-pipeline

If we install tekton pipelines successfully, we can use the kubectl get pods -n tekton-pipelines to see pods deployed by the chart. See the below messages.

# kubectl get pods -n tekton-pipelines
NAME                                           READY   STATUS    RESTARTS   AGE
tekton-pipelines-controller-6f9df8d49d-7dwcc   1/1     Running   8          21h
tekton-pipelines-webhook-57d67b5c6d-nfjk7      1/1     Running   4          21h

• I have successfully installed tekton-pipelines (release version: 0.25.0) using the above helm chart, and have passed the tutorial in tekton docs. That is, in an other word, this helm chart repository works.

Programme discussions

• Based on the circumstance that tekton already has an official helm chart repository and it works successfully, the next question for this issue is to discuss about the form of integrating the tekton-helm-chart into ks-devops.
• The simplest way to integrate the chart repository is copying a fixed release (e.g. v0.25.0) of the chart repository to ks-devops/charts/ks-devops/charts/tekton and add tekton into dependency list in ks-devops/charts/ks-devops/Chart.yaml.
• Is there a better choice to integrate the tekton-helm-chart repository?

[LinuxSuRen]

I prefer to provide the simplest solution here. Install Tekton is a small part of Tekton integration with ks-devops. For example, add the Tekton chart into the dependency, add some instruction about it. Even we don't need to upload the zip file of the Tekton chart.

The most important part is about how to use Tekton in ks-devops. Let's put our energy into this part.

[wujiahao15]

I prefer to provide the simplest solution here. Install Tekton is a small part of Tekton integration with ks-devops. For example, add the Tekton chart into the dependency, add some instruction about it. Even we don't need to upload the zip file of the Tekton chart.

The most important part is about how to use Tekton in ks-devops. Let's put our energy into this part.

Copy that.

[wujiahao15]

@LinuxSuRen When integrating tekton chart as our subchart, I find that the namespace in tekton-helm-chart are hard-coded as tekton-pipelines, i.e. we could not install it into kubesphere-devops-system and kubesphere-devops-worker.

I cloned the repository of tekton-helm-chart locally, and I am trying to revise the tekton-helm-chart template. I got a question here, how can I discuss with others to get a change of the helm chart?

[LinuxSuRen]

Creating an issue on the official repository should be the best way.

By the way, it's not a crucial problem. There's no limitation that Tekton mast be installed in the namespace kubesphere-devops-system.

[wujiahao15]

Okay, I got it. The cretical problem is how to use tekton in ks-devops. The detail of the tekton deployment can iterate gradually. The most important thing is to come up with the whole integration solution.