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[GH-ISSUE #519] Matching `runs-on` labels for self-hosted runners #353

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opened 2026-03-01 21:42:36 +03:00 by kerem · 4 comments

kerem commented

2026-03-01 21:42:36 +03:00

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Originally created by @dradetsky on GitHub (Feb 4, 2021).
Original GitHub issue: https://github.com/nektos/act/issues/519

I'm trying to use act to run some workflows locally. However, for some reason my organization is using self-hosted runners. This means that rather than the more common runs-on key such as runs-on: ubuntu-latest, my workflow says runs-on: [self-hosted, Linux, X64, infra]. I think these are a list of labels s.t. any runner in my org's runner group which has all those labels is a valid candidate for running the workflow.

The problem is that I can't match this with -P options. Or at least, it's not clear how I'm supposed to.

I've since learned that a workaround is to write e.g. act -P self-hosted=catthehacker/ubuntu:act-latest, but this is counterintuitive and you should probably add a line of documentation.

Originally created by @dradetsky on GitHub (Feb 4, 2021). Original GitHub issue: https://github.com/nektos/act/issues/519 I'm trying to use act to run some workflows locally. However, for some reason my organization is using self-hosted runners. This means that rather than the more common `runs-on` key such as `runs-on: ubuntu-latest`, my workflow says `runs-on: [self-hosted, Linux, X64, infra]`. I think these are a list of labels s.t. any runner in my org's runner group which has all those labels is a valid candidate for running the workflow. The problem is that I can't match this with `-P` options. Or at least, it's not clear how I'm supposed to. I've since learned that a workaround is to write e.g. `act -P self-hosted=catthehacker/ubuntu:act-latest`, but this is counterintuitive and you should probably add a line of documentation.

kerem closed this issue

2026-03-01 21:42:36 +03:00

kerem commented

2026-03-01 21:42:37 +03:00

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@catthehacker commented on GitHub (Feb 5, 2021):

Could you explain how is this counterintuitive and what we can do to fix that?
It's mentioned in README and act --help:

  -P, --platform stringArray   custom image to use per platform (e.g. -P ubuntu-18.04=nektos/act-environments-ubuntu:18.04)

@catthehacker commented on GitHub (Feb 5, 2021): Could you explain how is this counterintuitive and what we can do to fix that? It's mentioned in README and `act --help`: ``` -P, --platform stringArray custom image to use per platform (e.g. -P ubuntu-18.04=nektos/act-environments-ubuntu:18.04) ```

kerem commented

2026-03-01 21:42:37 +03:00

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@github-actions[bot] commented on GitHub (Mar 8, 2021):

Issue is stale and will be closed in 14 days unless there is new activity

@github-actions[bot] commented on GitHub (Mar 8, 2021): Issue is stale and will be closed in 14 days unless there is new activity

kerem commented

2026-03-01 21:42:37 +03:00

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@ap0ught commented on GitHub (Mar 8, 2021):

as a new user I ran into this same thing.
the error message I get is this.
[main.yml/A job to say hello] 🚧 Skipping unsupported platform 'self-hosted'

My first instinct is to find a way to alias self-hosted with ubuntu-latest
If this taught me how to alias or mentioned I could run with the -P option the error would be less negative.

@ap0ught commented on GitHub (Mar 8, 2021): as a new user I ran into this same thing. the error message I get is this. [main.yml/A job to say hello] 🚧 Skipping unsupported platform 'self-hosted' My first instinct is to find a way to alias self-hosted with ubuntu-latest If this taught me how to alias or mentioned I could run with the -P option the error would be less negative.

kerem commented

2026-03-01 21:42:37 +03:00

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@catthehacker commented on GitHub (Apr 2, 2021):

In my opinion act usage is quite well documented in README.md file. If you feel like something is unclear please share your thoughts or submit PR.

@catthehacker commented on GitHub (Apr 2, 2021): In my opinion `act` usage is quite well documented in `README.md` file. If you feel like something is unclear please share your thoughts or submit PR.

kerem referenced this issue

2026-03-01 21:51:12 +03:00

[PR #419] [CLOSED] If env take3 #1444

kerem referenced this issue

2026-03-01 21:51:12 +03:00

[PR #424] [MERGED] EvalBool and Interpolation fixes #1446

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[GH-ISSUE #519] Matching runs-on labels for self-hosted runners #353

[GH-ISSUE #519] Matching `runs-on` labels for self-hosted runners #353