See the Explanation below for complete solution.
Explanation:
0) SSH to the correct host
ssh ckad00044
(Optional sanity)
kubectl config current-context
kubectl get ns | grep rapid-goat
1) Inspect the Deployment and current container name
kubectl -n rapid-goat get deploy busybox
kubectl -n rapid-goat get deploy busybox -o jsonpath='{.spec.template.spec.containers[*].name}{"\n"}' kubectl -n rapid-goat get deploy busybox -o jsonpath='{.spec.template.spec.containers[*].image}{"\n"}' Note the current container name (likely something like busybox). We need to rename it to musl.
2) Edit the Deployment (best for renaming container)
Renaming a container is easiest with edit:
kubectl -n rapid-goat edit deploy busybox
In the editor, find:
spec:
template:
spec:
containers:
- name: <old-name>
image: <old-image>
Change it to:
- name: musl
image: busybox:musl
Save and exit.
3) Ensure the rollout happens and completes
kubectl -n rapid-goat rollout status deploy busybox
4) Verify the new Pod template is correct
Check the Deployment template:
kubectl -n rapid-goat get deploy busybox -o jsonpath='{.spec.template.spec.containers[0].name}{"\n"}{.spec.
template.spec.containers[0].image}{"\n"}'
Check running Pods and the image actually used:
kubectl -n rapid-goat get pods -o wide
POD=$(kubectl -n rapid-goat get pods -l app=busybox -o jsonpath='{.items[0].metadata.name}' 2>/dev/null || true) If you don't have that label selector, just pick a pod name from kubectl get pods and:
kubectl -n rapid-goat describe pod <pod-name> | sed -n '/Containers:/,/Conditions:/p'

See the solution below with Step by Step Explanation.
Explanation:
Solution (Step by Step) :
1. Configure the Deployment for Rolling Updates:
- IJpdate your application deployment to specify a 'rollinglJpdate' strategy
- Set 'maxunavailable' and 'maxSurge' to control the rolling update process-
- Include a 'strategy.type' to 'Rollingupdates
- Set ' imagePullPolicy' to 'Always' to ensure that new images are always pulled from the Docker Hub repository.

2. Apply the Deployment: - Apply the updated deployment using 'kubectl apply -f your-application-deployment-yamr 3. Push a New Image to Docker Hub: - UPdate your application's container image in the Docker Hub repository and push the new image With a different tag. For example, update the tag from "latest to 'v2'. 4. Monitor the Deployment: - Observe the rolling update process using 'kubectl get pods -l app=your-application'. You should see new pods with the updated image being created and old pods being terminated. 5. Verify the Update: - Once the rolling update is complete, use 'kubectl describe deployment your-application-deployment to verify that the 'updatedReplicas' field matches the 'replicas' field. This confirms that the update was successful. ,

See the solution below with Step by Step Explanation.
Explanation:
Solution (Step by Step) :
1. Create a Dockerfile:
- Create a new 'Dockerfile' with the following content

- Replace 'your-java-library' with the actual Java library name. - Replace 'new-version' and 'old-version' with the desired versions. - Adjust the 'apt-get' commands to match the package manager of your chosen base image. 2. Build the Image: - Build the image using tne Dockefflle: docker build -t updated-image:latest 3. Modify your application code: - Modify your Java code to explicitly use the desired version of the library. You can achieve this by: - Setting a System Property: Pass the desired version as a system property to the JVM, and your application can then read and use it. - Using the Classpath: Add the specific jar file for the desired version to the classpath at runtime. - Conditional Loading: Implement logic in your code to determine which version to use based on specific conditions or user input. 4. Update the Deployment: - Modify your Deployment YAML file to use the newly built image:

5. Apply the Changes: - Apply the updated Deployment using ' kubectl apply -f deployment_yamr 6. Test the Application: - Access your application and ensure it functions correctly with both versions of the library. You should be able to test both versions of the library and switch between them based on your requirements.,

Solution:

See the solution below with Step by Step Explanation.
Explanation:
Solution (Step by Step) :
1. Create a ServiceAccount:
- Create a ServiceAccount in the namespace where our microservice is deployed:

2. Create a Role: - Create a Role in the namespace where the database is deployed, granting access to the database resources:

3. Create a ROIeBinding: - Create a RoleBinding in the database namespace to bind the Role to the ServiceAccount:

4. Apply the Configuration: - Apply the created ServiceAccount, Role, and Roledinding using 'kubectl apply -r commands: bash kubectl apply -f my-microservice-sa_yaml kubectl apply -f my-database-access-role-yaml kubectl apply -f my-database-access-rolebinding.yaml 5. Configure the Microservice: - Mount the ServiceAccount token as a secret within the microservice's pod:

6. Verify Permissions: - Access the database from the microservice pod to verify that the required permissions are granted.