Devops part20 Docker install and CMDs

30 04 2021
DOCKER
Docker is a centralized platform for packaging, deploying,
and running applications.
Before Docker, many users face the
problem that a particular code is running in the developer's
system but not in the user's system. So, the main reason to
develop docker is to help developers to develop applications
easily, ship them into containers, and can be deployed anywhere.

develop- ship- deployed

DOCKER?
CONTAINER VIRTUALIZATION

VIRTUAL MACHINE
--OS
--APP


JAVA APP-- JRE, OS\LIB

APP- OS\LIB-- OS -HW(CPU,RAM,HDD)

OS--KERNEL/SHELL

DOCKER APPLICATION--DOCKER ENGINE

YOUR OS KERNEL,HW
NO VM,NO OS IN VM.

OS-LINUX, DOCKER SUPPORT LINUX KERNEL
OS-WINDOWS -- WINDOWS KERNEL

LESS HW UTILIZATION
RUN MUTLI APP IN DIFF CONTAINERS

SAME APP IN MUTLIPLE CONTAINERS


DOCKER

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Kubernetes is an open-source container-orchestration
system for automating computer application deployment,
scaling, and management. It was originally designed by
Google and is now maintained by the Cloud Native Computing
Foundation

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Docker Toolbox -- any windows 7,8,8.1,10

docker for windows 10
docker desktop for win 10 pro/ent latest build

docker toolbox
win 10 ent old build.
https://github.com/docker/toolbox/releases/

boot2docker.iso
-- VM (default) in virtualbox

docker environment prvided by VM(default)
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https://docs.docker.com/docker-for-windows/install/

docker

install docker desktop

update wsl 2
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cmd1:
docker pull hello-world

docker pull ubuntu

cmd2:
docker run -it ubuntu bash
root@...#

cmd3:
docker run -it ubuntu bash
root@..#

cmd1:
docker image ls


docker ps


docker rmi [ubuntu image id]

docker ps -a

docker stop [containerID]

docker rm [contianerID]

repeat stop n rm till all container on image delete

docker rmi [ubuntu iamge ID]
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