Failed to pull image: rpc error: code = Unknown desc = failed to pull and unpack image. dial tcp: lookup read: connection refused

Question

I've suddenly started having errors when pulling images from a private container repository. At first I thought the credentials maybe expired, but even after updating the secret and verifying the serviceaccount configuration, I still got the errors.

So I tried to deploy something from a public repository (alpine from Docker Hub) just to see if the issue was exactly the private repository and the problem is exactly the same.

Failed to pull image "alpine": rpc error: code = Unknown desc = failed to pull and unpack image "docker.io/library/alpine:latest": failed to resolve reference "docker.io/library/alpine:latest": failed to do request: Head "https://registry-1.docker.io/v2/library/alpine/manifests/latest": dial tcp: lookup registry-1.docker.io on [::1]:53: read udp [::1]:52580->[::1]:53: read: connection refused  

Answer 1

Maybe this one?!

There is an issue affecting DNS now.
https://status.azure.com/en-us/status for more information - could be related.

Answer 2

There is an issue affecting DNS in AKS at the moment.
Working through resolving this.

Answer 3

@Goncalo Oliveira If you are still seeing this issue, please let me know in the comment.

There was an Azure outage on Aug 30th that might have caused this issue. It is mitigated.
You can find details of the outage here.