Day 26/40 - Kubernetes Network Policies Explained

Kubernetes Network Policies Explained

Welcome to day 26/40 of the certified Kubernetes administrator 2024 (CKA) series. This video will explore Kubernetes network policies from scratch, including setting up network add-ons like Calico.

In this video, you'll learn:
- What is a Kubernetes network policy
- Why do we use a network policy in Kubernetes
- Create a cluster that supports network policy
- Install a network add-on such as Calico
- Create a network policy to restrict access to the pods

👨🏼‍💻 #40daysofKubernetes Challenge:

📖 Course Schedule:
I'll release 3-4 videos per week and host live Q&A sessions on weekends to answer your questions and guide you through the CKA certification process.

🕵🏻‍♂️ Who Should Watch:
This CKA course is designed for beginners, college students, and working professionals who want to learn Kubernetes from scratch, prepare for the CKA certification exam, or enhance their knowledge. It was designed based on the latest curriculum for the CKA exam in May 2024 and uses 1.30.2 as the Kubernetes version.

Let's start your Kubernetes journey together!

𝗖𝗢𝗠𝗣𝗟𝗘𝗧𝗘 𝗧𝗨𝗧𝗢𝗥𝗜𝗔𝗟 𝗦𝗘𝗥𝗜𝗘𝗦 👌 It’s 🅵🆁🅴🅴 ⛳

✅ 𝗔𝘇𝘂𝗿𝗲 𝗗𝗲𝘃𝗢𝗽𝘀 𝗭𝗲𝗿𝗼 𝘁𝗼 𝗛𝗲𝗿𝗼:

✅ 𝗔𝗭𝟵𝟬𝟬 𝗔𝘇𝘂𝗿𝗲 𝗙𝘂𝗻𝗱𝗮𝗺𝗲𝗻𝘁𝗮𝗹𝘀 𝗙𝘂𝗹𝗹 𝗖𝗼𝘂𝗿𝘀𝗲

✅ 𝗡𝗮𝗺𝗮𝘀𝘁𝗲 𝗚𝗼𝗼𝗴𝗹𝗲 𝗖𝗹𝗼𝘂𝗱 | 𝗚𝗖𝗣 𝗧𝘂𝘁𝗼𝗿𝗶𝗮𝗹 𝗳𝗼𝗿 𝗯𝗲𝗴𝗶𝗻𝗻𝗲𝗿𝘀, 𝗮 𝗰𝗼𝗺𝗽𝗹𝗲𝘁𝗲 𝗽𝗹𝗮𝘆𝗹𝗶𝘀𝘁 𝗳𝗼𝗿 𝘁𝗵𝗲 𝗔𝘀𝘀𝗼𝗰𝗶𝗮𝘁𝗲 𝗖𝗹𝗼𝘂𝗱 𝗘𝗻𝗴𝗶𝗻𝗲𝗲𝗿 (𝗔𝗖𝗘) 𝗖𝗲𝗿𝘁𝗶𝗳𝗶𝗰𝗮𝘁𝗶𝗼𝗻 𝗘𝘅𝗮𝗺:

✅ 𝗔𝘇𝘂𝗿𝗲 𝗗𝗮𝘁𝗮 𝗳𝘂𝗻𝗱𝗮𝗺𝗲𝗻𝘁𝗮𝗹𝘀 𝗗𝗣 𝟵𝟬𝟬 𝗳𝘂𝗹𝗹 𝗰𝗼𝘂𝗿𝘀𝗲

✅ 𝗝𝗲𝗻𝗸𝗶𝗻𝘀 𝗧𝘂𝘁𝗼𝗿𝗶𝗮𝗹 𝗳𝗼𝗿 𝗕𝗲𝗴𝗶𝗻𝗻𝗲𝗿𝘀

✅ #𝟭𝟬𝘄𝗲𝗲𝗸𝘀𝗼𝗳𝗰𝗹𝗼𝘂𝗱𝗼𝗽𝘀 - 𝗥𝗲𝗮𝗹-𝘁𝗶𝗺𝗲 𝗰𝗼𝗺𝗽𝗹𝗲𝘅 𝗵𝗮𝗻𝗱𝘀-𝗼𝗻 𝗽𝗿𝗼𝗷𝗲𝗰𝘁𝘀 𝗼𝗻 𝗖𝗹𝗼𝘂𝗱 𝗮𝗻𝗱 𝗗𝗲𝘃𝗢𝗽𝘀

✅ 𝗗𝗲𝘃𝗢𝗽𝘀 𝗮𝗻𝗱 𝗖𝗹𝗼𝘂𝗱 𝗣𝗼𝗱𝗰𝗮𝘀𝘁𝘀:

✅ 𝗚𝗶𝘁𝗹𝗮𝗯 𝗖𝗜 𝗖𝗗 𝗧𝘂𝘁𝗼𝗿𝗶𝗮𝗹 | 𝗘𝗻𝗱 𝗧𝗼 𝗘𝗻𝗱 𝗥𝗲𝗮𝗹-𝘁𝗶𝗺𝗲 𝗣𝗿𝗼𝗷𝗲𝗰𝘁 [𝗙𝘂𝗹𝗹 𝗖𝗼𝘂𝗿𝘀𝗲]

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𝗖𝗼𝗻𝗻𝗲𝗰𝘁 𝗺𝗲 𝗛𝗲𝗿𝗲:👇👇

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References 📚:

#devops #techtutorialswithpiyush

[AhXmINg]

Great to see you again. The last meet is at the previous video lol

[bijkashama]

After reading and watching a lot of tutorials about this Kubernetes networking concept, now through your tutorial I can really say with confidence that I understand. Thank you so much!😊

[raisulkarim]

Well explained. Best resource at online..

[oshabzsam]

Thank you for all you do. I really appreciate that you are doing all these for free

[artbart]

As usual, useful info with live troubleshooting!

[guntreddirajesh]

best video to understand network policies in kuberenetes

[VijayPolsani]

Kudos to you for all the work you put to bring CKA to life

[chinwahdavidlam]

thank you for your support. I feel great on my cka journey!!

[GopiVivekManne]

Hands down!! This is one of the best practical explanation on k8s Network policies.👍💯

[floehden]

Thank you for explaining network policies!

[abc-edm]

thanks for your work and effort, I can smell the fun part of troubleshooting issue from here, of course there will be lessons about it ...

[SandyLearner]

Hello !!
Thanks for such a meticulously planned CKA K8s Course. Not for Exam, but really what and why matter learning K8s in today's Platform Engg Evolving Roles.
A earnest request in ur series, Pls include CNI Networking (like a Cilium, Calico etc ) in future episodes for Complex MicroService Mgmt . 😊😊

[password]

As Awesome as before, the simplicity is at best and real time challenges makes it worthy, and top of it your discord channel is very helpful as a lot of members are contributing and helping others.

[GrigTech]

my 9th day here, hopefully soon will finish and re watch again. Great Series Piyush.

[SandyLearner]

Hello !!
Also had some queries. Evolving Tools in K8s like Istio, Rancher, Kustomize and etc.. Apart from CKA and CKAD knowledge, any other knowledge in other tools and Docker Adv required??

[harshgupta]

Bro, I am thinking of doing all the tasks in one go. Like after watching this security and all storage videos I will start the doing the tasks. What do you think?

[divyamsharma]

Question: You are referencing the Tiers as worker nodes but stating the network policies in terms of pods, I guess pods would be running the worker nodes. Do you mean that pods running on different nodes can also connect with each other by default?

[vaibhav]

Sir facing issue in downloading the cluster it throws '''✗ Joining worker nodes 🚜
Deleted nodes: "kind-cka-cluster1-worker" "kind-cka-cluster1-worker2"]
ERROR: failed to create cluster: failed to join node with kubeadm: command "docker exec --privileged kind-cka-cluster1-worker2 kubeadm join --config /kind/kubeadm.conf --skip-phases=preflight --v=6" failed with error: exit status 1 ''' ruined this lecture stuck there for 2 hours 🥲