Debug School: Yogansh

Question Day 3 -SVC

Yogansh — Mon, 25 Sep 2023 07:29:08 +0000

What is service
Why do we need it
How does it works

Ans1 :- Service is a kuberentes resource which can help us to connect to through the endpoints of the other resources(for eg PODS). It's basically used to load Balance between the kubernetes resources

Ans2:- We need services for eg if we deploy some pods in a cluster every time we re deploy it will change IP's so to communicate between two will become an issue plus Transferring data from one pod to another can also get difficult this is where Service Helps

Ans3:- Services works when label of pods matches the selector label of the service the transfer of data will start

Questions for DAY 2

Yogansh — Fri, 22 Sep 2023 11:57:51 +0000

1-What is a NameSpace?
Name Space is Logical cluster division in which we divide the resources constraint of a cluster in a logical way such that changes done for one Utility doesn't affect others

2- What is Pod?
Pod is the smallest atomic unit of a kubernetes cluster which is instantiated by kubelet. Its a logical unit to merge a container . It cannot be accesed as its never created . There can be more than one container in a Pod

3- What is replicaset?
Replicaset is a Kubernetes object which are capable of creating replicas of the pods to n number of times if by chance any of the pod goes down then they can Auto-Heal it by adding new pods in place of the pods which have gone down.

4- What is Deployment?
Deployment is a Kubernetes object where we can Control Replicas of a pod similar to replicasets but it gives an additional advantage of switching between the versions that is we can Rollout a new version but at same time if needed we can Rollback to the previous version.

What are the components of Worker

Yogansh — Thu, 21 Sep 2023 09:21:20 +0000

KUBELET
KUBEPROXY

What are the components of Master?

Yogansh — Thu, 21 Sep 2023 09:18:30 +0000

API SERVER
ETCD
CONTROL MANAGER
SCHEDULER

How it works?

Yogansh — Thu, 21 Sep 2023 09:15:00 +0000

Kubernetes works on the concept of Master node and worker Node
Kubernetes Cluster is the top most layer under which nodes are created under nodes we have pods which have containers running in it

Why do we need it?

Yogansh — Thu, 21 Sep 2023 09:13:23 +0000

We need kubernetes for various issues which Container based Applications are not able to resolve or will take some dedicated time to get resolved like
Auto Healing :-
Kubernetes have a concept of Replica Sets where you can create multiple replicas of a pod incase one of the pod goes down other will pick up and will replace it
SCALABILITY :- Container based application such as docker has Issues when we need to scale up the performance of the application by increasing the data This is where Kubernetes comes Handy
Load balancing :- Load balancing is also an Important feature which we can achieve through Kubernetes between multiple pods to secure memory consumption

What is Kubernetes?

Yogansh — Thu, 21 Sep 2023 09:02:55 +0000

Kubernetes is a container orchestration system which was developed by Google and adopted by CNCF it helps us in to resolve issues in container based application like Scalability, Load balancing and Auto healing.