Day 11/40 - Multi Container Pod Kubernetes - Sidecar vs Init Container

Welcome to day 11/40 of the Certified Kubernetes Administrator (CKA) Full Course. In this video, we will explore multi-container pods in Kubernetes with a detailed conceptual explanation, a live demo, and an engaging hands-on assignment.
In this video, you'll learn:
- What are environment variables in Kubernetes, and how do we use that
- Introduction to multi container pod in kubernetes
- How to create an init container inside a pod
- Commands and arguments in Kubernetes pod yaml
- Demo and troubleshooting
🚀 Reinforce your knowledge with practical tasks in the Day 11 folder of our GitHub repository: github.com/piy...
👨🏼‍💻 #40daysofKubernetes Challenge:
Join our 40-day challenge and solidify your Kubernetes skills. Details can be found in the "#40daysofkubernetes.md" file on GitHub or by watching our Day 0 video.
📖 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:
• Azure DevOps Zero to H...
✅ 𝗔𝗭𝟵𝟬𝟬 𝗔𝘇𝘂𝗿𝗲 𝗙𝘂𝗻𝗱𝗮𝗺𝗲𝗻𝘁𝗮𝗹𝘀 𝗙𝘂𝗹𝗹 𝗖𝗼𝘂𝗿𝘀𝗲
• AZ900WithPiyush - Azur...
✅ 𝗡𝗮𝗺𝗮𝘀𝘁𝗲 𝗚𝗼𝗼𝗴𝗹𝗲 𝗖𝗹𝗼𝘂𝗱 | 𝗚𝗖𝗣 𝗧𝘂𝘁𝗼𝗿𝗶𝗮𝗹 𝗳𝗼𝗿 𝗯𝗲𝗴𝗶𝗻𝗻𝗲𝗿𝘀, 𝗮 𝗰𝗼𝗺𝗽𝗹𝗲𝘁𝗲 𝗽𝗹𝗮𝘆𝗹𝗶𝘀𝘁 𝗳𝗼𝗿 𝘁𝗵𝗲 𝗔𝘀𝘀𝗼𝗰𝗶𝗮𝘁𝗲 𝗖𝗹𝗼𝘂𝗱 𝗘𝗻𝗴𝗶𝗻𝗲𝗲𝗿 (𝗔𝗖𝗘) 𝗖𝗲𝗿𝘁𝗶𝗳𝗶𝗰𝗮𝘁𝗶𝗼𝗻 𝗘𝘅𝗮𝗺:
• Namaste Google Cloud, ...
✅ 𝗔𝘇𝘂𝗿𝗲 𝗗𝗮𝘁𝗮 𝗳𝘂𝗻𝗱𝗮𝗺𝗲𝗻𝘁𝗮𝗹𝘀 𝗗𝗣 𝟵𝟬𝟬 𝗳𝘂𝗹𝗹 𝗰𝗼𝘂𝗿𝘀𝗲
• Microsoft Azure Data F...
✅ 𝗝𝗲𝗻𝗸𝗶𝗻𝘀 𝗧𝘂𝘁𝗼𝗿𝗶𝗮𝗹 𝗳𝗼𝗿 𝗕𝗲𝗴𝗶𝗻𝗻𝗲𝗿𝘀
• Jenkins Tutorial For B...
✅ #𝟭𝟬𝘄𝗲𝗲𝗸𝘀𝗼𝗳𝗰𝗹𝗼𝘂𝗱𝗼𝗽𝘀 - 𝗥𝗲𝗮𝗹-𝘁𝗶𝗺𝗲 𝗰𝗼𝗺𝗽𝗹𝗲𝘅 𝗵𝗮𝗻𝗱𝘀-𝗼𝗻 𝗽𝗿𝗼𝗷𝗲𝗰𝘁𝘀 𝗼𝗻 𝗖𝗹𝗼𝘂𝗱 𝗮𝗻𝗱 𝗗𝗲𝘃𝗢𝗽𝘀
• 10WeeksOfCloudOps Chal...
✅ 𝗗𝗲𝘃𝗢𝗽𝘀 𝗮𝗻𝗱 𝗖𝗹𝗼𝘂𝗱 𝗣𝗼𝗱𝗰𝗮𝘀𝘁𝘀:
• DevOps and Cloud Podcasts
✅ 𝗚𝗶𝘁𝗹𝗮𝗯 𝗖𝗜 𝗖𝗗 𝗧𝘂𝘁𝗼𝗿𝗶𝗮𝗹 | 𝗘𝗻𝗱 𝗧𝗼 𝗘𝗻𝗱 𝗥𝗲𝗮𝗹-𝘁𝗶𝗺𝗲 𝗣𝗿𝗼𝗷𝗲𝗰𝘁 [𝗙𝘂𝗹𝗹 𝗖𝗼𝘂𝗿𝘀𝗲]
• Gitlab CI CD Tutorial ...
Subscribe to our channel to get notified about the latest videos.
🔥 / techtutorialswithpiyush
-----------------------------------------------------------------------------------------------------------------------
𝗖𝗼𝗻𝗻𝗲𝗰𝘁 𝗺𝗲 𝗛𝗲𝗿𝗲:👇👇
🔥𝗬𝗼𝘂𝗧𝘂𝗯𝗲 ▶ / techtutorialswithpiyush
⛳𝗟𝗶𝗻𝗸𝗲𝗱𝗜𝗻 ▶ / piyush-sachdeva
🚀𝗜𝗻𝘀𝘁𝗮𝗴𝗿𝗮𝗺 ▶ / techtutorialswithpiyush
🌍𝗧𝘄𝗶𝘁𝘁𝗲𝗿 ▶ / techie_piyush
👨‍💻 𝗚𝗶𝘁𝗵𝘂𝗯 ▶ github.com/piy...
✍ 𝗠𝗲𝗱𝗶𝘂𝗺.𝗰𝗼𝗺 ▶ / piyush.sachdeva055
📚 𝗱𝗲𝘃.𝘁𝗼 ▶ dev.to/piyushs...
✨𝗗𝗶𝘀𝗰𝗼𝗿𝗱 ▶ / discord
-----------------------------------------------------------------------------------------------------------------------
References 📚:
#devops #techtutorialswithpiyush

[@CarinaConstantinova-r2u]

This video deserves more attention!

[@TechTutorialswithPiyush]

Thank you

[@AbdulMateen-bm3kv]

awesome!!

[@sagarbirla2879]

amazing explaination

[@TechTutorialswithPiyush]

Thank you!

[@kowshiks229]

after watching each videos....gives me good conceptual knowledge ...and boosts my confidence to crack this exam... OG MAN

[@narasimhasaladi7]

dont worry bro ur hadwork pays off u soon , when every one get into the world of kubernetes u will boom like anything ,best of luck 🧿

[@TechTutorialswithPiyush]

Thank you so much brother!❤️

[@gunanidhimohanty460]

The content is superb and need more and more support

[@TechTutorialswithPiyush]

Thank you so much 😊👍

[@strangemate]

nice explanation , thanks

[@TechTutorialswithPiyush]

welcome

[@password301992]

Simplified eplanation ! Loved it

[@TechTutorialswithPiyush]

Glad you liked it

[@roia6011]

Great work , Thank u

[@TechTutorialswithPiyush]

Thank you and you're welcome

[@kunalbagwe6091]

Bro you are a TECH GURU for us. Thanks Piyush bhai.

[@TechTutorialswithPiyush]

Just someone who's trying to help ❤️ not a guru , but thank you for the kind words

[@kundankumar5395]

It was a great session....

[@TechTutorialswithPiyush]

Thanks

[@dheerajkasaudhan1244]

Nice detailed explanation >>

[@TechTutorialswithPiyush]

Glad it was helpful!

[@kirangundamala8434]

Nice Explanation

[@satishalla]

Nice explanation

[@TechTutorialswithPiyush]

Thanks and welcome

[@artbart9080]

Nice video.Waiting for others...

[@TechTutorialswithPiyush]

More to come!

[@kundanchannekar8048]

Yesterway saw you with live stream with Abhishek and Shubham all my teachers in same screen...🤩

[@TechTutorialswithPiyush]

Yeah, we did that after a long time :) I enjoyed it too

[@sanudasomkar9734]

❤

[@ebenezerbarning5093]

great job Piyush sir. u always make complex concept look easy. u are the best. thanks again

[@TechTutorialswithPiyush]

Thank you so much for the wonderful feedback!

[@floehden]

Thank you for this! It's mostly better, to see the database up, before the webservice can access it. thank you for showing how to do this

[@TechTutorialswithPiyush]

You're welcome!

[@NithishkumarP-ug2em]

Nice explanation....

[@TechTutorialswithPiyush]

Thank you!

[@Ganesh-tc4pi]

Containers are immutable in nature once created it won't be modified even init containers also

[@brahmaiahboddu5762]

Hi Piyush, Thanks for the detailed explanation of the init container What about a sidecar container.

[@TechTutorialswithPiyush]

sidecar containers are being created when you use an application that needs to gather some metrics/data from your pod itself. Monitoring application such as datadog is one of the usecase. We will cover that in a seperate video.

[@brahmaiahboddu5762]

@@TechTutorialswithPiyush Thanks for the explanation Piyush

[@karnajeetsawant5635]

Hi Piyush. Thanks for making the concept easier. I have a question though. Can there be a situation where a deadlock occurs between the init container and the pod. If such a situation arises then how would one solve it?

[@TechTutorialswithPiyush]

Thank you for the feedback. There wouldnt be a deadlock situation as init containers are always executed first and only after the successfull completion of init container, your main container will be executed.

[@debillion]

Instead of each pod having its own sidecar container, is it possible for mutiple pods to use one shared pod container located somewhere? if yes, how can it be done?

[@TechTutorialswithPiyush]

Replied this over the livestream but let me add the answer here as well. It is not possible for multiple pods to use one shared pod/container. It involves a lot of dependency on that shared container and other pods will be impacted if something happens to the shared container, it make the application tightly couple which is an anti-pattern of microservices.

[@debillion]

@@TechTutorialswithPiyush Thanks for your reply. However, I am still not very clear. Once again, I have a bitbucket Pipelines. I want to use one shared Docker pod instead of the same sidecar in every pod. I have both the runner container and Docker container in a manifest but I wanted to know how to seperate the runner container from the docker container (sidecar container) so that I can run one Docker instance and multiple runner instances on one Kubernetes node.

[@TechTutorialswithPiyush]

@@debillion can you join our discord community and share the issue in help-general channel? thecloudopscommunity.org

[@nope-ms4rx]

like @narasimhasaladi7 said. Very soon! Your tutorials will be integral for less technical folks learning K8s! Only way is up! Keep going strong.

[@TechTutorialswithPiyush]

My goal is to simplify the learning of advance topics so that anyone can learn and take advantage of it. thank you for the support.