build: GitHub Builder runner mappings#25086
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thaJeztah
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May 18, 2026
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| ### Runner selection | ||
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| The `runner` input accepts either a single GitHub-hosted Linux runner label or a |
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Is there a page we could link to in the GitHub docs that shows the available labels?
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Yes there is https://docs.github.com/en/actions/reference/runners/github-hosted-runners#supported-runners-and-hardware-resources and https://github.com/actions/partner-runner-images/#available-images but not sure about linking to these pages though 🤔
dvdksn
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May 18, 2026
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| newline-delimited platform mapping. A single label is used for every platform: | ||
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| ```yaml | ||
| runner: ubuntu-24.04 | ||
| ``` | ||
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| The default value is a platform mapping that uses GitHub-hosted Ubuntu runners: | ||
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| ```yaml | ||
| runner: | | ||
| default=ubuntu-24.04 | ||
| linux/arm=ubuntu-24.04-arm | ||
| linux/arm64=ubuntu-24.04-arm | ||
| ``` |
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Suggest we re-order this to show the default first, and what it resolves to after.
Suggested change
| newline-delimited platform mapping. A single label is used for every platform: | |
| ```yaml | |
| runner: ubuntu-24.04 | |
| ``` | |
| The default value is a platform mapping that uses GitHub-hosted Ubuntu runners: | |
| ```yaml | |
| runner: | | |
| default=ubuntu-24.04 | |
| linux/arm=ubuntu-24.04-arm | |
| linux/arm64=ubuntu-24.04-arm | |
| ``` | |
| newline-delimited platform mapping. | |
| The default value is a platform mapping that uses GitHub-hosted Ubuntu runners: | |
| ```yaml | |
| runner: | | |
| default=ubuntu-24.04 | |
| linux/arm=ubuntu-24.04-arm | |
| linux/arm64=ubuntu-24.04-arm | |
| ``` | |
| In the platform job, the runner label resolves to a single value: | |
| ```yaml | |
| runner: ubuntu-24.04 | |
| ``` |
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Yes sounds better indeeed
Signed-off-by: CrazyMax <1951866+crazy-max@users.noreply.github.com>
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follow-up docker/github-builder#188
The reusable workflows now accept either a GitHub-hosted Linux runner label or a newline-delimited platform mapping, while the legacy
auto,amd64, andarm64values are deprecated.