tekton logs can get pretty slow when you have a large pipeline

[chmouel]

Versions and Operating System

• Kubernetes version:

  Output of kubectl version:

Client Version: version.Info{Major:"1", Minor:"19", GitVersion:"v1.19.0", GitCommit:"299b6af535d19b70c661eb42ed4d30aa3325fc90", GitTreeState:"clean", BuildDate:"2020-12-05T03:24:36Z", GoVersion:"go1.15.2", Compiler:"gc", Platform:"darwin/amd64"}
Server Version: version.Info{Major:"1", Minor:"19", GitVersion:"v1.19.0+7070803", GitCommit:"70708036fc265771f8d0a45598209018a8b9bd3e", GitTreeState:"clean", BuildDate:"2020-12-05T12:01:07Z", GoVersion:"go1.15.2", Compiler:"gc", Platform:"linux/amd64"}

• Tekton Pipeline version:

  Output of tkn version or kubectl get pods -n tekton-pipelines -l app=tekton-pipelines-controller -o=jsonpath='{.items[0].metadata.labels.version}'

Client version: dev
Pipeline version: v0.16.3
Triggers version: v0.8.1

• Operating System:

OSX

Expected Behavior

When I use tekton pr logs with or without -f where I have a lot of tasks in there (~around 40), tkn logs gets pretty slow.

I made a comparison to the https://github.com/wercker/stern tool which does multi pod tailing too and it is much faster tailing with stern.

Maybe we want to look for the logic how it's done there.

Actual Behavior

See this video which explains it better :

https://streamable.com/ppzoe8

Steps to Reproduce the Problem

1. Very large pipeline (ie this one)
2. tkn pr logs -f it

Additional Info

stern command line for info :

stern -n ns --color=always -l tekton.dev/pipelineRun=pipelines-catalog-run

/kind bugs

[tekton-robot]

Issues go stale after 90d of inactivity. Mark the issue as fresh with /remove-lifecycle stale with a justification. Stale issues rot after an additional 30d of inactivity and eventually close. If this issue is safe to close now please do so with /close with a justification. If this issue should be exempted, mark the issue as frozen with /lifecycle frozen with a justification.

/lifecycle stale

Send feedback to tektoncd/plumbing.

[chmouel]

/remove-lifecycle stale

[tekton-robot]

Issues go stale after 90d of inactivity. Mark the issue as fresh with /remove-lifecycle stale with a justification. Stale issues rot after an additional 30d of inactivity and eventually close. If this issue is safe to close now please do so with /close with a justification. If this issue should be exempted, mark the issue as frozen with /lifecycle frozen with a justification.

/lifecycle stale

Send feedback to tektoncd/plumbing.

[tekton-robot]

Stale issues rot after 30d of inactivity. Mark the issue as fresh with /remove-lifecycle rotten with a justification. Rotten issues close after an additional 30d of inactivity. If this issue is safe to close now please do so with /close with a justification. If this issue should be exempted, mark the issue as frozen with /lifecycle frozen with a justification.

/lifecycle rotten

Send feedback to tektoncd/plumbing.

[tekton-robot]

Rotten issues close after 30d of inactivity. Reopen the issue with /reopen with a justification. Mark the issue as fresh with /remove-lifecycle rotten with a justification. If this issue should be exempted, mark the issue as frozen with /lifecycle frozen with a justification.

/close

Send feedback to tektoncd/plumbing.

[tekton-robot]

@tekton-robot: Closing this issue.

In response to [this](https://github.com/tektoncd/cli/issues/1278#issuecomment-968184065): >Rotten issues close after 30d of inactivity. >Reopen the issue with `/reopen` with a justification. >Mark the issue as fresh with `/remove-lifecycle rotten` with a justification. >If this issue should be exempted, mark the issue as frozen with `/lifecycle frozen` with a justification. > >/close > >Send feedback to [tektoncd/plumbing](https://github.com/tektoncd/plumbing). Instructions for interacting with me using PR comments are available [here](https://git.k8s.io/community/contributors/guide/pull-requests.md). If you have questions or suggestions related to my behavior, please file an issue against the [kubernetes/test-infra](https://github.com/kubernetes/test-infra/issues/new?title=Prow%20issue:) repository.