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feat: allow passing custom ACTIONS_CACHE_URL #1695

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LouisHaftmann
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@LouisHaftmann LouisHaftmann commented Mar 26, 2024

Closes #1051

Currently it is not possible to overwrite the ACTIONS_CACHE_URL which is used for communicating with the cache api. The ACTIONS_CACHE_URL is always overwritten by the runner itself (runner code snippet).

Being able to overwrite this environment variable is crucial for using the actions/cache action with self-hosted runners, as it allows for a self-hosted caching solution.

To set a custom ACTIONS_CACHE_URL, you just need to define the CUSTOM_ACTIONS_CACHE_URL (open for naming suggestions) env var, which takes precedence over the default cache url env var.

Self-hosting an actions cache server is a much requested feature and this PR would make that way easier

Other issues/discussions:

@LouisHaftmann LouisHaftmann requested a review from a team as a code owner March 26, 2024 16:34
@edigaryev
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@robherley, @bethanyj28 would you mind taking a look at this?

@LouisHaftmann
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Any feedback on this PR? Is there something I should implement differently or something missing? I will gladly do anything to get this PR merged.

@LouisHaftmann
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Here are some more PRs mentioning the same issue:
#947
#679

Would be great to have this feature! I don't see any real problem or security risk with this. Am I missing something? Would there be a safer way to allow for overwriting the cache server url?

Please let me know 🙏 @robherley @bethanyj28

@fingerart
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@robherley @bethanyj28

@breezewish
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Would be great to have this option! It is hard to overwrite the cache url in self-hosted runners currently.

@fkorotkov
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In the meantime we created a simple fork that patches compiled JavaScript in dist folder of actions/cache to allow overriding ACTIONS_CACHE_URL.

See here how to run it with your own implementation of the Caching API.

@Tycale
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Tycale commented Jul 18, 2024

Patching the binary also works, but it’s frustrating not to be able to do it correctly. It's such a small patch..

@LouisHaftmann
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I'm beginning to feel like only Github staff contributions are welcome in this repo 🥲

@Tycale
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Tycale commented Jul 18, 2024

I tried contacting a staff member via email to review this PR. Fingers crossed! 🤞🏻

enescakir added a commit to enescakir/runner that referenced this pull request Jul 31, 2024
The runner script sets the `ACTIONS_CACHE_URL` using the value from the
system connection. Currently, there's no way to override it.

Some community users use custom cache solutions with self-hosted
runners. The need to maintain a fork of `actions/runner` or
`actions/toolkit`, and `actions/cache` to override the value is their
solution. However it leads to significant maintenance work.

If the runner script allows the `ACTIONS_CACHE_URL` value to be
overridden by the `CUSTOM_ACTIONS_CACHE_URL` environment variable, it
makes life a lot easier for the community, myself included.

An alternative solution could involve allowing the base URL value in
`actions/toolkit` to be overridden. Several individuals have submitted
similar PRs to this one actions/toolkit#1695,
but they have not received adequate attention from the maintainers.
enescakir added a commit to enescakir/runner that referenced this pull request Jul 31, 2024
The runner script sets the `ACTIONS_CACHE_URL` using the value from the
system connection. Currently, there's no way to override it.

Some community users use custom cache solutions with self-hosted
runners. They need to maintain a fork of `actions/runner` or
`actions/toolkit`, and `actions/cache` to override the value in their
solution. However it leads to significant maintenance work.

If the runner script allows the `ACTIONS_CACHE_URL` value to be
overridden by the `CUSTOM_ACTIONS_CACHE_URL` environment variable, it
makes life a lot easier for the community, includes myself.

An alternative solution could involve allowing the base URL value in
`actions/toolkit` to be overridden. Several individuals have submitted
similar PRs to this one actions/toolkit#1695,
but they have not received adequate attention from the maintainers.
@enescakir
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I've submitted a PR to introduce a similar feature into the runner script. I hope one of them merges. actions/runner#3411

@enescakir
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Hi @Link- , Enabling the overwriting the ACTIONS_CACHE_URL variable would simplify things for the community. What do you think about this PR?

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Add support for non-GitHub-hosted caching for self-hosted runners
7 participants