在创建 Kubernetes pod 时在 EC2 实例上获取 ImagePullBackOff

Question

I have deployed simple react app on kubernetes through docker-desktop successfully. It was having only one master there. Now I am doing the same thing on AWS Ubuntu EC2 Instance, its having one master and two slave nodes, all are connected properly. Also a demo Nginx server is already deployed successfully on my master EC2 instance.

I am getting ImagePullBackOff status on React deployment/service. Is there any configuration I have to make in EC2 to make it work. How can I debug the things and what could be the reasons for same.

I have followed these guides and you can assume my deployment and service.yml file to be same as provided in these links.

https://dev.to/rieckpil/deploy-a-react-application-to-kubernetes-in-5-easy-steps-516j

https://stackoverflow.com/a/37306838/9465933

I am pushing the pods to local docker registry. Is there any docker secret config's are required for this? Any help will be highly appreciated.

Answer 1

If you expand on the logs with kubectl describe , you will probably notice that the error is that Kubernetes cannot fetch the image from the registry.

This is due to two things:

1. You need to create a secret to access your registry. https://kubernetes.io/docs/tasks/configure-pod-container/pull-image-private-registry/

2. You said to have a local registry. Is it publicly reachable? Notice that the EC2 instances need to be able to access it. So check port-forwarding, firewall configuration, etc in your LAN.