Part 7 | Most Important CKA Question Certificate Signing Request Certified Kubernetes Administrator

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Question 14 - Create a new user “ajeet”. Grant him access to the cluster. User “ajeet” should have permission to create, list, get, update and delete pods. The private key exists at location:​
/root/ajeet/.key and csr at /root/ajeet.csr
Question 13 - Take a backup of the ETCD database and save it to “/opt/etcd-backup.db” . Also restore the ETCD database from the backup​
Question 12 - Upgrade the Cluster (Master and worker Node) from 1.18.0 to 1.19.0. Make sure to first drain both Node and make it available after upgrade.​
Question 11 - Worker Node “node01” not responding, Debug the issue and fix it.​
Question 10 - Create a Persistent Volume with the given specification.​
Volume Name: pv-demo​
Storage:100Mi​
Access modes: ReadWriteMany​
Host Path: /pv/host-data​
Question 9 - Use JSON PATH query to retrieve the oslmages of all the nodes and store it in a file “all-nodes-os-info.txt” at root location.​
Note: The osImage are under the nodeInfo section under status of each node.​
Question 8 - Get the node node01 in JSON format and store it in a file at ​ ./node-info.json​
Question 7 - Create a pod called test-pod in "custom" namespace belonging to the test environment (env=test) and backend tier (tier=backend).​ image: nginx:1.17​
Question 6 - Create a pod called pod-multi with two containers, as given below:​
Container 1 - name: container1, image: nginx​
Container2 - name: container2, image: busybox, command: sleep 4800​
Question 5 - Create a static pod on node01 called static-pod with image nginx and you have to make sure that it is recreated/restarted automatically in case ​of any failure happens
Question 4 - Deploy a web-nginx pod using the nginx:1.17 image with the labels set to tier=web-app.​
Question 3 - Create a new deployment called my-deployment. Scale the deployment to 3 replicas. ​
Make sure desired number of pod always running.
Question 2 - Create a new deployment called myproject, with image nginx:1.16 and ​1 replica. Next upgrade the deployment to version 1.17 using rolling​ update​. Make sure that the version upgrade is recorded in the resource annotation.​
Question 1 - Create a new pod called web-pod with image busybox Allow the pod to be able to set system_time​. The container should sleep for 3200 seconds​
This is a video of all the exam questions I have ever asked. If you are preparing to take the CKA, or if you are taking the CKA, then this video is for you. I hope it helps!
This is the first of three videos where I discuss a module of questions from the Certified Knowledge Architect (CKA) exam. These questions provide good examples of what to expect on the exam and how to answer them. There's a ton I could say about the CKA, but in this video I keep it high level and superficially examine the exam to determine what topics will be covered in detail later on.
Step by Step on How to issue a certificate for a user:
1. Create private key
2. Create a CertificateSigningRequest
3. Approve the CertificateSigningRequest
4. Get the certificate
5. Create Role and RoleBinding
6. Add to kubeconfig
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[@laasyakrupa9001]

this is amazing...thank you...really helps

[@akdevsecops]

Thank you Ajith bro. I am eagerly awaiting the upload of the remaining parts. Please continue to support us.

[@iajeetkhan]

Thanks! I am on it! I will try my best to release more videos ASAP. Keep showering the love and support by giving a shoutout on social media and sharing it with peers. Thanks!

[@user-ub8bz2zr7s]

Excellent Sir. Always waiting for your videos.

[@iajeetkhan]

Thanks for your support. I am humbled 🙏🏻

[@user-hy2pd4zf5b]

Thanks for making the video so quickly sir and nice explanation.

[@iajeetkhan]

Thanks for your support. Here is a gift for you - A free coupon to enrol in my Udemy Course - www.udemy.com/course/performance-optimization-tuning-tcpip-nginx-linux/?couponCode=THANKS

[@SunitaSonawane2007]

Superb and detailed video 👍

[@iajeetkhan]

Thanks for your constant support. I am humbled 🙏🏻🙏🏻

[@iajeetkhan]

Thanks for your support. Here is a gift for you - A free coupon to enroll in my Udemy Course - www.udemy.com/course/performance-optimization-tuning-tcpip-nginx-linux/?couponCode=THANKS

[@hims0912]

Thank you so much

[@iajeetkhan]

I am glad that the CKA series is helping. Stay subscribed for upcoming videos🙏🏻

[@shubhamshastri7409]

bhai maza aagya

[@iajeetkhan]

I am glad it was useful. Keep Learning & Keep Sharing :)

[@amitdas1302]

After switching to Ajeet context when we are trying to list pods it is asking for username and password, could you please help where eactly we should get the credentials

[@abdulwadoodsyed4436]

Hello Sir, Isn't the question asking to create clusterrole and clusterrolebinding?

[@20-abdulrehman3]

thanks a lot brother

[@iajeetkhan]

I am glad my videos are helpful. I wish you all the best for the exam. I recommend to complete all the videos at least twice with practice. Please do share your experience after the exam. Keep Learning & Keep Sharing 💪🏻💪🏻

[@20-abdulrehman3]

Sure mate. I will definitely share

[@manojkumar-jt3fw]

waiting for this part

[@iajeetkhan]

I am trying my best to create more parts as soon as possible. Motivation from people like you keeps me on track to release more videos soon. Thanks for your love and support. I am humbled.

[@iajeetkhan]

Thanks for your support. Here is a gift for you - A free coupon to enroll in my Udemy Course - www.udemy.com/course/performance-optimization-tuning-tcpip-nginx-linux/?couponCode=THANKS

[@rahilshafi2433]

I receive this error on killercode when I tried getting output of pods while I'm logged in as ajeet in kubernetes cluster. TLS "private key doesnt match the public key"

[@rahilshafi2433]

I followed the same procedure as you showed in new killerkoda environment and it's now working fine so it might be certifcates were not synchronizing on K8s cluster previously.

[@Hrishi-sm2fy]

Thank you Ajeet for the video. I have one doubt please respond. In the question, it has mentioned that we need to create user, role and role binding. After creating all, do we really need to add it to kubeconfig? As it is not mentioned in it. Do we need to perform the same in CKA exam too?

[@iajeetkhan]

I might show things in the videos for demonstration and learning purposes. In the exam, you just need to follow the scenario mentioned in the question.

[@saloniipawar6631]

I am getting "error: You must be logged in to the server (Unauthorized)" when I am trying to get anything from ajeet context... I have tried multiple times still getting same error.

[@iajeetkhan]

The context you are looking for is not available by default in the killercoda playground. I created it for the demo purpose to demonstrate actual exam like environment/questions. You can either create the context and then try it for the practice.

[@saloniipawar6631]

@@iajeetkhan understood. Thank you

[@zaynkhan464]

Thanks Ajeet for creating this excellent content. Can you please have a look at end of tutorial like in your case changing context to ajeeet. After that When you type any command further, you will receive an error "error: You must be logged in to the server (Unauthorized)". Hope you understand that.

[@iajeetkhan]

I am glad that my tutorials are helpful. Can you please elaborate more on the scenario you mentioned

[@zaynkhan464]

@@iajeetkhan Can you please check on your end after changing context to ajeeet in the end. Can you please run a extra command like k auth can-i --list=true. You will get an error "You must be logged in to the server (Unauthorized)".

[@zaynkhan464]

@@iajeetkhan It is important to set CN and O attribute of the CSR. If we do CSR like this it will fix this error. "openssl req -new -key xyz.key -out xyz.csr -subj '/CN=user-name/O=group-name' Hope this works for all.

[@PrithviKumarDetne]

Ajeet - Do we need to run these commands at the end? These were not asked in question . kubectl config set-context myuser --cluster=Kubernetes --user=myuser and kubectl config use-context myuser

[@juveriyasiddiqui8619]

Pls pls complete this series pls.... let us know about all the questions in k8s exam

[@iajeetkhan]

The series is almost complete. You can follow the series and attempt the exam as many people in comments section are reporting that their exam got cleared with good marks

[@juveriyasiddiqui8619]

@@iajeetkhan i just completed the training of cka... i want to clear this exam ... pleaseee let us know about the exam environment and setup prerequisites plsss... the questions shared by you are enough for exam prep ??? Pls reply

[@iajeetkhan]

@@juveriyasiddiqui8619 you check out my video about tips. It is a part of this playlist

[@arungobinath]

Hi , Ajith. Totally how many question are you going to prepare

[@iajeetkhan]

There will be at least 10 parts to this series. I am including the most possible questions and topic. However, if there are more topics/questions I discover, then I am going to create more than 10 parts. Thanks for your constant support. Stay subscribed.

[@anirudhshingala6884]

Hi Ajeet, i am planning to give exam in early DEC and had 2 questions. 1. Is copying from doc and pasting in CKA environment working or we need to type whole yaml which does not get created from imperative commands. 2. I tried 1 of the killer.sh free sessions with 25 questions and they were comparatively hard that that you are discussing in this series. so what complexity of questions are asked

[@iajeetkhan]

1. Yes, copy paste is allowed but there could be indentation issues while pasting. There will be PV and PVC related questions which could not be done through imperative commands. So practice to write the basic yaml. 2. Killer.sh is tough and the exam questions are not that difficult. I suggest you watch my tips video. I have mentioned these details in that video.

[@user-zg9sg7qc4y]

Sir if i mention expiration seconds even if they don't ask will my marks get cut??

[@user-zg9sg7qc4y]

Or even manual storage in PVC

[@iajeetkhan]

Ultimately the scenario should be fulfilled.

[@user-zg9sg7qc4y]

@@iajeetkhan Thank you sir because of you I am loving kubernetes and am confident of the CKA exam God bless you sir

[@iajeetkhan]

@@user-zg9sg7qc4y glad to hear that my course is helping you. Please let us know about your exam results and experience. I wish you all the best 🙏

[@adityamoray3271]

@@iajeetkhan Sir if I can do all the questions without seeing can I give the exam I'm not referring to other materials I trust you

[@krishnenduroy8093]

controlplane $ kubectl config set-credentials myuser --client-key=myuser.key --client-certificate=myuser.crt --embed-certs=true error: could not stat client-certificate file myuser.crt: stat myuser.crt: no such file or directory. Hi Ajeet, could you please explain the error.

[@iajeetkhan]

The error is itself saying that the file myuser.crt is not available hence the command is not able to find it. Please make sure the file is present in the directory from where you are running the command or make sure the give path to the file in the command.

[@krishnenduroy8093]

@@iajeetkhan got it. Thanks !!