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WorkingDir inherit permissions of parent directory #7983

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chitrangpatel
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@chitrangpatel chitrangpatel commented May 24, 2024

Prior to this PR, workingDirInit did not deal handle permissions of nested child directories in workingDirs. This PR provides the same permissions as that of the existing parent directory. This allows non-root users to also create relative sub diectories in a workspace if used as a workingDir.

Fixes #7804.

Changes

If the complete path in used as the workingDir already exists, the permissions are not modified.
Only non-existent child directories are created with the same permissions as the existing parent.

Submitter Checklist

As the author of this PR, please check off the items in this checklist:

  • Has Docs if any changes are user facing, including updates to minimum requirements e.g. Kubernetes version bumps
  • Has Tests included if any functionality added or changed
  • pre-commit Passed
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  • Meets the Tekton contributor standards (including functionality, content, code)
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Release Notes

WorkingDir inherit permissions of parent directory

/kind bug

@tekton-robot tekton-robot added release-note Denotes a PR that will be considered when it comes time to generate release notes. kind/bug Categorizes issue or PR as related to a bug. labels May 24, 2024
@tekton-robot tekton-robot added the size/L Denotes a PR that changes 100-499 lines, ignoring generated files. label May 24, 2024
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/assign @vdemeester

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The following is the coverage report on the affected files.
Say /test pull-tekton-pipeline-go-coverage to re-run this coverage report

File Old Coverage New Coverage Delta
cmd/workingdirinit/main.go 23.1% 5.9% -17.2
pkg/pod/workingdir_init.go 95.0% 100.0% 5.0

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The following is the coverage report on the affected files.
Say /test pull-tekton-pipeline-go-coverage-df to re-run this coverage report

File Old Coverage New Coverage Delta
cmd/workingdirinit/main.go 23.1% 5.9% -17.2
pkg/pod/workingdir_init.go 95.0% 100.0% 5.0

@chitrangpatel chitrangpatel force-pushed the fix-workingdir-init-permissions branch from 8996c9c to b47ec86 Compare May 24, 2024 17:39
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The following is the coverage report on the affected files.
Say /test pull-tekton-pipeline-go-coverage to re-run this coverage report

File Old Coverage New Coverage Delta
pkg/pod/workingdir_init.go 95.0% 100.0% 5.0

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The following is the coverage report on the affected files.
Say /test pull-tekton-pipeline-go-coverage-df to re-run this coverage report

File Old Coverage New Coverage Delta
pkg/pod/workingdir_init.go 95.0% 100.0% 5.0

@JeromeJu JeromeJu self-assigned this May 24, 2024
@chitrangpatel chitrangpatel force-pushed the fix-workingdir-init-permissions branch from b47ec86 to 764baa9 Compare May 24, 2024 19:10
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The following is the coverage report on the affected files.
Say /test pull-tekton-pipeline-go-coverage-df to re-run this coverage report

File Old Coverage New Coverage Delta
cmd/workingdirinit/main.go 23.1% 5.9% -17.2
pkg/pod/workingdir_init.go 95.0% 100.0% 5.0

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The following is the coverage report on the affected files.
Say /test pull-tekton-pipeline-go-coverage to re-run this coverage report

File Old Coverage New Coverage Delta
cmd/workingdirinit/main.go 23.1% 5.9% -17.2
pkg/pod/workingdir_init.go 95.0% 100.0% 5.0

@@ -473,7 +473,6 @@ func TestPodBuild(t *testing.T) {
Image: images.WorkingDirInitImage,
Command: []string{"/ko-app/workingdirinit"},
Args: []string{filepath.Join(pipeline.WorkspaceDir, "test")},
WorkingDir: pipeline.WorkspaceDir,
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Shall we keep this for backwards-compatibility? and add a new one without it?

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No need. The workingDir only enabled creating directories inside the /workspace folder. We already account for it. It does not matter what the workingDir is since the init container only handles absolute paths now.

@@ -61,12 +60,11 @@ func TestWorkingDirInit(t *testing.T) {
Name: "working-dir-initializer",
Image: images.WorkingDirInitImage,
Command: []string{"/ko-app/workingdirinit"},
Args: []string{"/workspace/bbb", "aaa", "zzz"},
WorkingDir: pipeline.WorkspaceDir,
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ditto: shall we adding test cases instead of updating those?

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Again. I think the interesting bit is how this is used in conjunction with the init container. These are the arguments that we pass to the init container. We cannot keep things partially compatible. The eventual outcome is backwards compatible though.

If this is worrisome then I'm happy to split things up as they were. I just think this is cleaner and a transparent change so users shouldn't be affected by it.

Prior to this PR, workingDirInit did not deal handle permissions of
nested child directories in workingDirs. This PR provides the same
permissions as that of the existing parent directory. This allows
non-root users to also create relative sub diectories in a workspace
if used as a workingDir.
Fixes tektoncd#7804.
@chitrangpatel chitrangpatel force-pushed the fix-workingdir-init-permissions branch from 764baa9 to 5993c98 Compare May 27, 2024 15:44
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The following is the coverage report on the affected files.
Say /test pull-tekton-pipeline-go-coverage to re-run this coverage report

File Old Coverage New Coverage Delta
cmd/workingdirinit/main.go 23.1% 6.1% -17.0
pkg/pod/workingdir_init.go 95.0% 100.0% 5.0

@tekton-robot
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The following is the coverage report on the affected files.
Say /test pull-tekton-pipeline-go-coverage-df to re-run this coverage report

File Old Coverage New Coverage Delta
cmd/workingdirinit/main.go 23.1% 6.1% -17.0
pkg/pod/workingdir_init.go 95.0% 100.0% 5.0

@chitrangpatel chitrangpatel added this to the Pipeline v0.61 milestone May 27, 2024
@chitrangpatel chitrangpatel marked this pull request as draft May 29, 2024 16:44
@tekton-robot tekton-robot added the do-not-merge/work-in-progress Indicates that a PR should not merge because it is a work in progress. label May 29, 2024
@chitrangpatel chitrangpatel removed this from the Pipeline v0.61 milestone Jun 11, 2024
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Workingdir does not give write access to the group
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