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NEW QUESTION # 130
You have a Deployment named 'bookstore-deployment which deploys a Bookstore application, utilizing a PostgreSQL database. The deployment has 3 replicas. The database server is managed externally. The application is built With a feature to dynamically resize its replica count based on the load- You need to implement a strategy to automatically adjust the replica count to between 2 and 5, based on the CPU utilization of the pods. This should happen without manual intervention.
Answer:
Explanation:
See the solution below with Step by Step Explanation.
Explanation:
Solution (Step by Step) :
1. Create a Horizontal Pod Autoscaler (HPA):
- use the 'kubectl create hpa' command to create an HPA named 'bookstore-hpa'
- Set the 'minRepIicas' to 2 and 'maxRepIic.as' to 5, defining the desired range of replicas.
- Set the 'targetCPlJLJtilizationPercentage' to 70, meaning the replica count will adjust when the average CPU utilization ot the pods crosses 70%.
- Specify the selector to match the 'bookstore-deployment' pods.
2. Apply the HPA: - Run 'kubectl apply -f bookstore-hpa.yamr to create the HPA. 3. Verify the HPA: - Check the status of the HPA using 'kubectl get hpa bookstore-hpa' 4. Observe Replica Adjustment: - Increase the load on the bookstore application to trigger the HPA scaling. - Monitor the replica count of the bookstore-deployment' using 'kL1bectl get deployments bookstore-deployment. You will observe the replica count automatically adjusting based on the CPL] utilization- 5. Customize Scaling Parameters: - You can customize the 'targetCPLJlJtilizationPercentage', 'minReplicas', and 'maxReplicaS in the HPA definition based on the application requirements and desired benavior.
NEW QUESTION # 131 
Task:
A pod within the Deployment named buffale-deployment and in namespace gorilla is logging errors.
1) Look at the logs identify errors messages.
Find errors, including User "system:serviceaccount:gorilla:default" cannot list resource "deployment" [...] in the namespace "gorilla"
2) Update the Deployment buffalo-deployment to resolve the errors in the logs of the Pod.
The buffalo-deployment 'S manifest can be found at -/prompt/escargot/buffalo-deployment.yaml See the solution below.
Answer:
Explanation:
Explanation
Solution:
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Text Description automatically generated
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NEW QUESTION # 132
Context
Context
A container within the poller pod is hard-coded to connect the nginxsvc service on port 90 . As this port changes to 5050 an additional container needs to be added to the poller pod which adapts the container to connect to this new port. This should be realized as an ambassador container within the pod.
Task
* Update the nginxsvc service to serve on port 5050.
* Add an HAproxy container named haproxy bound to port 90 to the poller pod and deploy the enhanced pod. Use the image haproxy and inject the configuration located at /opt/KDMC00101/haproxy.cfg, with a ConfigMap named haproxy-config, mounted into the container so that haproxy.cfg is available at /usr/local/etc/haproxy/haproxy.cfg. Ensure that you update the args of the poller container to connect to localhost instead of nginxsvc so that the connection is correctly proxied to the new service endpoint. You must not modify the port of the endpoint in poller's args . The spec file used to create the initial poller pod is available in /opt/KDMC00101/poller.yaml
Answer:
Explanation:
Solution:
apiVersion: apps/v1
kind: Deployment
metadata:
name: my-nginx
spec:
selector:
matchLabels:
run: my-nginx
replicas: 2
template:
metadata:
labels:
run: my-nginx
spec:
containers:
- name: my-nginx
image: nginx
ports:
- containerPort: 90
This makes it accessible from any node in your cluster. Check the nodes the Pod is running on:
kubectl apply -f ./run-my-nginx.yaml
kubectl get pods -l run=my-nginx -o wide
NAME READY STATUS RESTARTS AGE IP NODE
my-nginx-3800858182-jr4a2 1/1 Running 0 13s 10.244.3.4 kubernetes-minion-905m my-nginx-3800858182-kna2y 1/1 Running 0 13s 10.244.2.5 kubernetes-minion-ljyd Check your pods' IPs:
kubectl get pods -l run=my-nginx -o yaml | grep podIP
podIP: 10.244.3.4
podIP: 10.244.2.5
NEW QUESTION # 133
You need to create a container image for an application that uses a specific version of Node.js (v16.x). How would you define this version within your Dockerfile to ensure the application runs as expected in a Kubernetes cluster?
Answer:
Explanation:
See the solution below with Step by Step Explanation.
Explanation:
Solution (Step by Step) :
1. Specify Node.js Base Image:
- In your Dockerfile, start by selecting a Node.js base image from Docker Hub that matches the required version (v16.x).
- Example:
dockerfile
FROM node:16.x
2. Copy Application Code:
- Copy your Node.js application code into the Docker image.
- Example:
dockerfile
COPY
3. Install Dependencies:
- Use the 'RIJN' instruction to install any necessary Node.js dependencies using 'npm install'.
- Example:
dockerfile
RUN npm install
4. Define Startup Command:
- Specify the command to start your Node.js application within the Dockerfile_
- Example:
dockeffile
CMD ["npm", "start"]
5. Build and Deploy:
- Build your Docker image using the 'docker build' command.
- Deploy the image to your Kubernetes cluster using a Deployment or Pod.
- Ensure the container utilizes the specified Node.js version (v16.x).
NEW QUESTION # 134
You have a Deployment named that runs 3 replicas of a Wordpress container. You need to implement a rolling update strategy that allows for a maximum or two pods to be unavailable at any given time during the update process. Additionally, you want to ensure that the update process is triggered automatically whenever a new image is pushed to the Docker Hub repository 'wordpress/wordpress:latest'.
Answer:
Explanation:
See the solution below with Step by Step Explanation.
Explanation:
Solution (Step by Step) :
1. IJPdate the Deployment YAMLI
- Update the 'replicas to 2.
- Define 'maxunavailable: 2 and 'maxSurge: O' in the 'strategy.rollingupdate' section to control the rolling update process.
- Configure a 'strategy-type' to 'RollinglJpdate' to trigger a rolling update when the deployment is updated.
- Add a 'spec-template-spec-imagePullPolicy: Always" to ensure that the new image is pulled even if it exists in the pod's local cache.
2. Create the Deployment - Apply the updated YAML file using 'kubectl apply -f wordpress-deploymentyamr 3. Verify the Deployment: - Check the status of the deployment using 'kubectl get deployments wordpress-deployment to confirm the rollout and updated replica count. 4. Trigger the Automatic Update: - Push a new image to the 'wordpress/wordpress:latest' Docker Hub repository. 5. Monitor the Deployment: - Use 'kubectl get pods -l app=wordpress' to monitor the pod updates during the rolling update process. You will observe that two pods are terminated at a time, while two new pods with the updated image are created. 6. Check for Successful Update: - Once the deployment is complete, use 'kubectl describe deployment wordpress-deployment' to see that the 'updatedReplicas' field matches the 'replicas' field, indicating a successful update.
NEW QUESTION # 135
......
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