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docs: note restriction on URL format of mirrors

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Signed-off-by: David Karlsson <david.karlsson@docker.com>
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David Karlsson 2023-05-31 20:20:52 +02:00
parent ba46c769b3
commit 9d1f71c801
1 changed files with 17 additions and 1 deletions
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18
docs/recipes/mirror.md
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@ -31,6 +31,18 @@ relying entirely on your local registry is the simplest scenario.
It's currently not possible to mirror another private registry. Only the central It's currently not possible to mirror another private registry. Only the central
Hub can be mirrored. Hub can be mirrored.
The URL of a pull-through registry mirror must be the root of a domain.
No path components other than an optional trailing slash (`/`) are allowed.
The following table shows examples of allowed and disallowed mirror URLs.
| URL | Allowed |
| -------------------------------------- | ------- |
| `https://mirror.company.example` | Yes |
| `https://mirror.company.example/` | Yes |
| `https://mirror.company.example/foo` | No |
| `https://mirror.company.example#bar` | No |
| `https://mirror.company.example?baz=1` | No |
> **Note** > **Note**
> >
> Mirrors of Docker Hub are still subject to Docker's [fair usage policy](https://www.docker.com/pricing/resource-consumption-updates){: target="blank" rel="noopener" class=“”}. > Mirrors of Docker Hub are still subject to Docker's [fair usage policy](https://www.docker.com/pricing/resource-consumption-updates){: target="blank" rel="noopener" class=“”}.
@ -110,10 +122,14 @@ and add the `registry-mirrors` key and value, to make the change persistent.
```json ```json
{ {
"registry-mirrors": ["https://<my-docker-mirror-host>"] "registry-mirrors": ["https://mirror.company.example"]
} }
``` ```
> **Note**
>
> The mirror URL must be the root of the domain.
Save the file and reload Docker for the change to take effect. Save the file and reload Docker for the change to take effect.
> Some log messages that appear to be errors are actually informational messages. > Some log messages that appear to be errors are actually informational messages.