Debug School: Madhura

Day 3-Assignment

Madhura — Wed, 19 Oct 2022 09:33:34 +0000

What is POD? 5 Characteristics of pod The most basic unit of work which is a collection of one or more containers with shared storage and network resources. Characteristics:
Have a unique IP address.
Persistent storage volumes.
Configuration information which tells how a container should run.
Ephermal
Atomicity
What is Deployment and each feature of it with 1 example
It is a kind of resource which gives declarative updates to pods.
Features:
Replication
Controller
Versioning
Rollout
Rollback
What is Services and types of Services?
A service in kubernetes is a load balancer.
Label of pod should be same as the label of service.
Types of services include:
Load balancer which is required outside of the cluster to redirect the node.
Node which is required inside the cluster to redirect to the required pods.

Assignment 2- Day 2

Madhura — Tue, 18 Oct 2022 06:41:52 +0000

Kubernetes architecture

It comprises of Master and worker nodes a.k.a minions
Master node is in charge of the worker nodes. It is the entry point of all administrative tasks.
Worker nodes are the ones who do the work.

Components of master

i)Api-server: control plane front end
ii)Cluster store: Persistent storage cluster which uses etcd.
iii)Controller manager: It has controllers which checks for changes thus helping maintain desired state.
iv)Scheduler: Gives work to nodes and watches apiserver for new pods.

Components of worker

i)kubelet: Main agent which observes apiserver and instantiates pods , thus reporting it to master.
ii)container engine: It performs container management similar to Docker.
iii)kube-proxy: It does the networking for the kubernetes. It assigns IP addresses to the pods.

Assignment- Day 2

Madhura — Tue, 18 Oct 2022 04:51:02 +0000

The major problems solved by kubernetes are :

Application services deployed are automated.
Automated rollouts and rollbacks.
Automatic failover or self healing.
Secret and configuration management.
Load balancing of application components.
Auto scaling of application services when required.
Storage shared among multiple containers.
Replication of application components automated.
Workload placement.
Resource allocation automated.