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containers/images: clarify dockercfg limitions. (#12429) 

Related #59406

This commit clarifies the limitations of dockercfg use by Kubernetes, specifically, the lack of support for credential helpers.
pull/12469/head
O'meid 2019-02-01 10:05:33 +11:00 committed by Kubernetes Prow Robot
parent 9da045a934
commit d0d29d9ff0
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@ -170,6 +170,11 @@ will not work reliably on GCE, and any other cloud provider that does automatic
node replacement.
{{< /note >}}
{{< note >}}
Kubernetes as of now only supports the `auths` and `HttpHeaders` section of docker config. This means credential helpers (`credHelpers` or `credsStore`) are not supported.
{{< /note >}}
Docker stores keys for private registries in the `$HOME/.dockercfg` or `$HOME/.docker/config.json` file. If you put the same file
in the search paths list below, kubelet uses it as the credential provider when pulling images.