Debug School: Bhanu Prakash

Write a self notes which cover all the list of resources which you learnt in this session with 1 liner exaplainaton on

Bhanu Prakash — Fri, 11 Nov 2022 05:53:20 +0000

kubernetes learnt pods, services, deployments, containers and networking sacling replication controller PV, PVC by using the kubectl.

Q2. How Kubernetes works?All components and roles of their components

Bhanu Prakash — Wed, 09 Nov 2022 07:53:46 +0000

Kubernets kubernets that having multiple coponents that it sends the request and receives the api server consumes json then scheduler check how many containers are free to do then it will allocate those containers work it done

Components:
Kube-apiserver – where it distributes and manage request to work done by using json through front -end panel
Cluster store: - it stores and back up plans if any this happen then it easy to backup, distributed and watchable
Kube-controller-manager – manges the multiple nodes controller, endpoint controller, names space controller watches the for changes
Kube-scheduler – watches the apiserver for new pods, contriaints its aka mangage

Why we need Kubernetes?

Bhanu Prakash — Wed, 09 Nov 2022 07:36:49 +0000

It is a open source tool to use
Its manages load balancing 3. It automates rollback and roll out 4. Monitoring applications 5. It scheduling the tasks and manages work loads 6. Api to control
Easy to maintain environments 8. Managing nodes and containers
It is flexible, scalable and portable 10. Manges container on multiple hostS

What is POD?

Bhanu Prakash — Wed, 09 Nov 2022 07:32:57 +0000

What is POD?

POD contains one or multiple containers
POD having containers in different n/w can interact by using ports
POD having multiple containers can talk each as they are in same n/w by localhost
Easy to manage multiple containers in single instance
Single container POD we can say loose coupled app
Multiple container POD we can say tightly coupled app
Multiple POD’s they can share scheduling process
POD is a smallest unit

What is Kubernetes?

Bhanu Prakash — Wed, 09 Nov 2022 07:31:32 +0000

Kutbernet is a workload management
Infrastructure management
Managing nodes and containers
Easy to deploy applications
Easy to maintain environments
It performs operations on containers management
Monitoring applications
It’s a data center to store, manage
Load balancing
We can manage on multiple hosts
Its flexible, scalable portable
It smoothens container tasks

Diff between docker stop and docker kill?

Bhanu Prakash — Mon, 07 Nov 2022 13:04:43 +0000

*docker kill *- will stop the main entrypoint process/program abruptly
[root@localhost ~]# docker kill raju raju [root@localhost ~]# docker ps -a CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES 5662bb7a660a httpd "httpd-foreground" About an hour ago Exited (137) 5 seconds ago raju
*docker stop *- will try to stop it gracefully (will ask politely)
[root@localhost ~]# docker stop raju raju [root@localhost ~]# docker ps -a CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES 5662bb7a660a httpd "httpd-foreground" About an hour ago Exited (0) 16 seconds ago raju