I’m trying to deploy an application but it’s giving error ImagePullBackOff

Worker can’t pull image from Harbor - Container Image Registry.

The image in the harbor is set to public, the option to prevent execution of vulnerable images is set to none.

Type Reason Age From Message

Normal Scheduled 4s default-scheduler Successfully assigned default/doc-admin-7848dff49d-mbf5r to worker04
Normal Pulling 3s kubelet Pulling image “”
Warning Failed 3s kubelet Failed to pull image “”: rpc error: code = Unknown desc = Error response from daemon: unknown: The image is not signed in Notary.
Warning Failed 3s kubelet Error: ErrImagePull
Normal BackOff 2s kubelet Back-off pulling image “”
Warning Failed 2s kubelet Error: ImagePullBackOff

1- I have no network problem, I can ping and do name resolution through worker04.
2- I have no problem of ssl communication between the server.

Welcome to Ubuntu 20.04.3 LTS (GNU/Linux 5.4.0-99-generic x86_

Last login: Mon Feb 14 08:14:30 2022 from

ubuntu@worker04:~$ nslookup

Non-authoritative answer:

ubuntu@worker04:~$ ping
PING ( 56(84) bytes of data.
64 bytes de ( icmp_seq=1 ttl=64 tempo=1.57 ms
64 bytes de ( icmp_seq=2 ttl=64 tempo=0.741 ms
64 bytes de ( icmp_seq=3 ttl=64 tempo=0.711 ms
— estatísticas de ping —
3 pacotes transmitidos, 3 recebidos, 0% perda de pacote, tempo 2021ms
rtt min/avg/max/mdev = 0.711/1.007/1.569/0.397 ms

ubuntu@worker04:~$ docker login
Authenticating with existing credentials…
WARNING! Your password will be stored unencrypted in /home/ubuntu/.docker/config.json.
Configure a credential helper to remove this warning. See

Login Succeeded

ubuntu@worker04:~$ curl
<!doctype html>


How can I debug “ImagePullBackOff”?

Or how do I solve this problem.

Cluster information:

Bare Metal
Rancherv 2.6.3
Kubernetes version: v1.21.9
Host OS: Ubuntu 20.04.03
CNI and version:
CRI and version:

You can format your yaml by highlighting it and pressing Ctrl-Shift-C, it will make your output easier to read.

hey, @efcunha
It’s not an issue with k8s.
Check this issue, it seems issue with harbor config.