Please see https://status.docker.com/ for times.

Remember, if you have autoscaling nodes that need to pull new apps, or have
pods that run with PullAlways, or push builds to the docker hub, while the
hub is down those operations will fail.

Mitigations could include:

1. Disable autoscaling for the duration
2. Use the image mirroring and transparent proxying feature of the
openshift integrated registry (switch the resolutionPolicy for your image
streams to Local on 3.9 or later) to automatically mirror remote images and
serve them from the local registry
3. Disable PullAlways from any deployed workloads so you can leverage
cached local images (if a pod tries to restart while the registry is down
and pull always is set, the new container won’t be started).
4. Push to a different registry than dockerhub, like the integrated
registry or quay.io
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