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/piyushsachdeva/CKA...
👨🏼‍💻 #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!
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References 📚:
#devops #techtutorialswithpiyush

[@kirangundamala8434]

Nice Explanation

[@password301992]

Simplified eplanation ! Loved it

[@TechTutorialswithPiyush]

Glad you liked it

[@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!❤️

[@sagarbirla2879]

amazing explaination

[@TechTutorialswithPiyush]

Thank you!

[@satishalla]

Nice explanation

[@TechTutorialswithPiyush]

Thanks and 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!

[@artbart9080]

Nice video.Waiting for others...

[@TechTutorialswithPiyush]

More to come!

[@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!

[@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!

[@NithishkumarP-ug2em]

Nice explanation....

[@TechTutorialswithPiyush]

Thank you!

[@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

[@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.

[@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