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Support image pull progress deadline for containerd  #4984

@rtheis

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@rtheis

Kubernetes kubelet provides an --image-pull-progress-deadline option that If no pulling progress is made before this deadline, the image pulling will be cancelled. This docker-specific flag only works when container-runtime is set to docker. (default 1m0s), see https://kubernetes.io/docs/reference/command-line-tools-reference/kubelet/. Unfortunately, this option is only available for the Docker shim. We'd like an option on containerd to support such a deadline/timeout in order to prevent hung image pulls. Extending the Kubernetes option to support this would be nice, but that is out of the scope for this issue.

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