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docs: add default label considerations

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toast-gear 2022-07-11 19:17:33 +01:00 committed by Yusuke Kuoka
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@ -1590,7 +1590,10 @@ jobs:
runs-on: custom-runner
```
Note that if you specify `self-hosted` in your workflow, then this will run your job on _any_ self-hosted runner, regardless of the labels that they have.
When using labels there are a few things to be aware of:
1. `self-hosted` is implict with every runner as this is an automatic label GitHub apply to any self-hosted runner. As a result ARC can treat all runners as having this label without physically having it a runner's manifest. You do not need to explicitly define this label in your runner manifests (you can if you want though).
2. In addition to the `self-hosted` label, GitHub also applies a few other [default](https://docs.github.com/en/actions/hosting-your-own-runners/using-self-hosted-runners-in-a-workflow#using-default-labels-to-route-jobs) labels to any self-hosted runner. These other default labels relate to the architecture of the runner and so can't be implicitly assumed by ARC as ARC doesn't know if your runner is `linux` or `windows`, `x64` or `ARM64`. If you wish to use these labels in your workflows you must add them to your runner manifests or ARC will ignore them.
### Runner Groups