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Show TaskRun logs from child PipelineRuns (Pipelines-in-Pipelines) #2886
Description
Feature request
tkn pipelinerun logs does not follow child PipelineRuns created by the Pipelines-in-Pipelines (PinP) feature. When a PipelineTask uses pipelineSpec or pipelineRef, the parent PipelineRun owns a child PipelineRun, not a TaskRun. tkn pipelinerun logs only discovers TaskRuns, so TaskRuns inside child PipelineRuns are invisible.
Inline pipelineSpec is already functional today, and tektoncd/pipeline#9432 adds pipelineRef support, making PinP a fully functional alpha feature (TEP-0056). In both cases, tkn cannot surface the child PipelineRun TaskRun logs.
Use case
Apply the following resources (enable-api-fields must be set to alpha):
apiVersion: tekton.dev/v1
kind: Pipeline
metadata:
name: parent-pipeline
spec:
tasks:
- name: call-child
pipelineSpec:
tasks:
- name: greet
taskSpec:
steps:
- name: echo
image: busybox
script: echo "Hello from child"
---
apiVersion: tekton.dev/v1
kind: PipelineRun
metadata:
name: parent-run
spec:
pipelineRef:
name: parent-pipelinekubectl apply -f example.yamlWait for it to complete, then try to view logs:
# Shows nothing. The parent has no TaskRuns, only a child PipelineRun.
$ tkn pipelinerun logs parent-run -f
# User must manually discover the child PipelineRun name.
$ kubectl get pipelineruns
NAME SUCCEEDED
parent-run True
parent-run-call-child True
# Then query the child separately to see its TaskRun logs.
$ tkn pipelinerun logs parent-run-call-child -f
[greet : echo] Hello from childThis applies recursively. Nested pipelines (parent, child, grandchild) require one manual command per level. The same issue affects pipelineRef-based PinP.
UI Example
tkn pipelinerun logs should recursively follow child PipelineRuns and show their TaskRun logs inline:
$ tkn pipelinerun logs parent-run -f
[call-child > greet : echo] Hello from childThe > notation indicates nesting: call-child > greet means task greet inside child PipelineRun call-child.
tkn pipelinerun describe should similarly surface child PipelineRuns in its output.
/kind feature
Activity
[-]tkn pipelinerun logs does not show TaskRun logs from child PipelineRuns (Pipelines-in-Pipelines)[/-][+]Show TaskRun logs from child PipelineRuns (Pipelines-in-Pipelines)[/+]twoGiants commentedon May 26, 2026
Hey @danielfbm! 👋 😺
Maybe you're interested to tackle this one once tektoncd/pipeline#9432 is merged.
twoGiants commentedon May 26, 2026
/help
/good-first-issue
tekton-robot commentedon May 26, 2026
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kamal2730 commentedon May 26, 2026
/assign
danielfbm commentedon May 27, 2026
Would love to. I see @kamal2730 already assigned himself, so I will wait for his take on this issue. Let me know if any more help is needed.