Add note to sanitize tags

Signed-off-by: CrazyMax <crazy-max@users.noreply.github.com>
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CrazyMax 2021-08-05 08:09:50 +02:00
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@ -3,6 +3,7 @@
* [Cannot push to a registry](#cannot-push-to-a-registry)
* [BuildKit container logs](#buildkit-container-logs)
* [With containerd](#with-containerd)
* [`repository name must be lowercase`](#repository-name-must-be-lowercase)
## Cannot push to a registry
@ -14,9 +15,11 @@ While pushing to a registry, you may encounter these kinds of issues:
* `failed commit on ref "manifest-sha256:...": unexpected status: 401 Unauthorized`
* `unexpected response: 401 Unauthorized`
These issues are not directly related to this action but are rather linked to [buildx](https://github.com/docker/buildx),
[buildkit](https://github.com/moby/buildkit), [containerd](https://github.com/containerd/containerd) or the registry
on which you're pushing your image. The quality of error message depends on the registry and are usually not very informative.
These issues are not directly related to this action but are rather linked to
[buildx](https://github.com/docker/buildx), [buildkit](https://github.com/moby/buildkit),
[containerd](https://github.com/containerd/containerd) or the registry on which
you're pushing your image. The quality of error message depends on the registry
and are usually not very informative.
### BuildKit container logs
@ -25,8 +28,9 @@ action step and attach BuildKit container logs to your issue.
### With containerd
Next you can test pushing with [containerd action](https://github.com/crazy-max/ghaction-setup-containerd) using the
following workflow. If it works then open an issue on [buildkit](https://github.com/moby/buildkit) repository.
Next you can test pushing with [containerd action](https://github.com/crazy-max/ghaction-setup-containerd)
using the following workflow. If it works then open an issue on [buildkit](https://github.com/moby/buildkit)
repository.
```yaml
name: containerd
@ -69,3 +73,57 @@ jobs:
run: |
sudo ctr --debug i push --user "${{ secrets.DOCKER_USERNAME }}:${{ secrets.DOCKER_PASSWORD }}" docker.io/user/app:latest
```
## `invalid reference format`
You may encounter this issue if you're using `github.repository` in your tag
name:
```
#10 importing cache manifest from ghcr.io/My-Org/repo:main
#10 ERROR: invalid reference format: repository name must be lowercase
```
## `repository name must be lowercase`
You may encounter this issue if you're using `github.repository` as a repo slug
in your tag:
```
#6 exporting to image
#6 exporting layers
#6 exporting layers 1.2s done
#6 exporting manifest sha256:b47f7dfb97b89ccd5de553af3c8cd94c4795884cbe5693e93946b1d95a7b1d12 0.0s done
#6 exporting config sha256:995e93fab8196893192f08a38deea6769dc4d98f86cf705eccc24ec96a3e271c 0.0s done
#6 ERROR: invalid reference format: repository name must be lowercase
------
> exporting to image:
------
error: failed to solve: invalid reference format: repository name must be lowercase
```
or a cache reference:
```
#10 importing cache manifest from ghcr.io/My-Org/repo:main
#10 ERROR: invalid reference format: repository name must be lowercase
```
To fix this issue you can use our [metadata action](https://github.com/docker/metadata-action)
to generate sanitized tags, or a dedicated step to sanitize the slug:
```yaml
- name: Sanitize repo slug
uses: actions/github-script@v4
id: repo_slug
with:
result-encoding: string
script: return `ghcr.io/${github.repository.toLowerCase()}`
- name: Build and push
uses: docker/build-push-action@v2
with:
context: .
push: true
tags: ${{ steps.repo_slug.outputs.result }}:latest
```