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admin: more details about action runner offline registration (#769)

This PR
- adds more details regarding the nature of the secret used when registering runners offline using `forgejo-cli actions register`,
- explains how to change the secret for an existing runner ([Forgejo PR #4619](https://codeberg.org/forgejo/forgejo/pulls/4619)),
- explains how to keep the Forgejo-side command idempotent if the labels aren't known ([Forgejo PR #4610](https://codeberg.org/forgejo/forgejo/pulls/4610))

Reviewed-on: https://codeberg.org/forgejo/docs/pulls/769
Reviewed-by: twenty-panda <twenty-panda@noreply.codeberg.org>
Co-authored-by: Emmanuel BENOÎT <tseeker@nocternity.net>
Co-committed-by: Emmanuel BENOÎT <tseeker@nocternity.net>
This commit is contained in:
Emmanuel BENOÎT 2024-07-24 05:41:53 +00:00 committed by Earl Warren
parent 46a3f68002
commit 65f556b638

View file

@ -339,6 +339,26 @@ The `Forgejo runner` needs to connect to a `Forgejo` instance and must be regist
--secret 7c31591e8b67225a116d4a4519ea8e507e08f71f
```
The secret must be a 40-character long string of hexadecimal numbers.
The first 16 characters will be used as an identifier for the runner, while
the rest is the actual secret. It is possible to update the secret of an
existing runner by running the command again on the Forgejo machine, with
the last 24 characters updated.
For instance, the command below would change the secret set by the previous
command:
```sh
$ forgejo forgejo-cli actions register --name runner-name --scope myorganization \
--secret 7c31591e8b67225a84e8e06633b9578e793664c3
# ^^^^^^^^^^^^^^^^ This part is identical
```
The registration command on the Forgejo side is mostly idempotent, with the
exception of the runner labels. If the command is run without `--labels`, they
will be reset, and the runner won't set them back until it is restarted. The
`--keep-labels` option can be used to preserve the existing labels.
### Configuration
The default configuration for the runner can be