Error in the Lab 10.1: "error: unable to upgrade connection: container not found ("ngix")"

The error message "error: unable to upgrade connection: container not found ("ngix")" that you are encountering in Kubernetes typically indicates that there's an issue with the container name specified in your command. It seems like there might be a typo in the container name.

In Kubernetes, when you execute a command like kubectl exec to enter a container, you need to specify the exact name of the container if the pod has multiple containers. The error suggests that Kubernetes cannot find a container named "ngix" in the specified pod. This name seems like it's intended to be "nginx", the name of a popular web server.

Here’s how you can troubleshoot and potentially resolve this issue:

1. Check the Pod's Container Names
   First, verify the name of the container inside the pod. You can list all containers in a pod using the following command:

kubectl get pod thirdpage-77c4bc9757-bwbpx -o jsonpath='{.spec.containers[*].name}'

2. Correct the Container Name
   Use the correct container name in your kubectl exec command. If the container is indeed named "nginx", the command should look something like this:

kubectl exec -it thirdpage-77c4bc9757-bwbpx -c nginx -- /bin/bash

3. Check the Pod Status

Since you mentioned the pod "thirdpage-77c4bc9757-bwbpx" was not running, ensure that the pod is in a running state. You can check the status of the pod with:

kubectl get pod thirdpage-77c4bc9757-bwbpx