从 Docker Registry API 下载私有仓库的清单

Question

通常，例如，对于 alpine 图像，我们通过以下方式获取身份验证令牌：

curl -i "https://auth.docker.io/token?service=registry.docker.io&scope=repository:library/alpine:pull"

然后我们可以使用它从注册表中获取清单：

curl -i -H "Authorization: Bearer $TOKEN" -H "Accept: application/vnd.docker.distribution.manifest.list.v2+json" https://registry-1.docker.io/v2/library/alpine/manifests/latest

当我们用我们的私有存储库（ourcompany/ourrepo）替换 library/alpine 时，获取令牌仍然有效，但是，下载清单会导致：

HTTP/1.1 401 Unauthorized
Content-Type: application/json
Docker-Distribution-Api-Version: registry/2.0
Www-Authenticate: Bearer realm="https://auth.docker.io/token",service="registry.docker.io",scope="repository:ourcompany/ourrepo:pull",error="insufficient_scope"
Date: Tue, 26 May 2020 10:32:56 GMT
Content-Length: 168
Strict-Transport-Security: max-age=31536000

{"errors":[{"code":"UNAUTHORIZED","message":"authentication required","detail":[{"Type":"repository","Class":"","Name":"ourcompany/ourrepo","Action":"pull"}]}]}

如何规避这个 401 错误？

我们需要获得额外的代币吗？另外发送身份验证凭据？做一些完全不同的事情？

Answer 1

您需要使用基本身份验证对 /token 的调用进行身份验证 https://docs.docker.com/registry/spec/auth/jwt/#getting-a-bearer-token

然后，您会收到一个 Bearer 令牌，您可以像使用公共存储库一样使用它。 /token 端点仅支持基本身份验证。

curl -i -H "Authorization: Basic $BASIC_AUTH" "https://auth.docker.io/token?service=registry.docker.io&scope=repository:myprivaterepo/myprivateimage:pull"
curl -i -H "Authorization: Bearer $TOKEN" -H "Accept: application/vnd.docker.distribution.manifest.list.v2+json" https://registry-1.docker.io/v2/myprivaterepo/myprivateimage/manifests/latest