Pratikshinde55/Docker-in-Docker-onAWS

launch Docker Container and in this launched Container again install Docker and launch Docker Container in it. "Docker containers inside another Docker container".

Docker inside the Docker

What is DOCKER IN DOCKER?(DinD)

Docker-in-Docker means we can run Docker containers inside another Docker container.

In Docker world One process communicate with Other process is because od "Unix Socket".

Command for go Location:

cd /run/containerd/

Command for list:

ls -i

There are two ways to create Docker in Docker

1. Lauch Container by sharing Host Docker Socket (-v /run/containerd/:/run/containerd/ )

2. Give all capabilities to the container (--privileged) --privileged <> Give extended privileges to this container

What is Privileged capabilities:

When we create container have very limited power(not root power) or Capabilities,that not able to Launch 'New container in it',

but Running in "--privileged" mode to new container give All capabilities to Start Dockerin it .

Using 2nd method DinD (Give all capabilities to the container)

• Prerequisite: AWS account

Step-1: [Install and Start docker service ] {DOCKER 1st}

Command for download Docker:

yum install docker -y

Command for start Docker Service:

systemctl start docker

Step-2: pull docker image (Docker provides a pre-created image for Docker inside Docker)

docker pull docker

Step-3: [lauch new Container by adding all Capabilities to the Container]

docker run -dit --privileged --name myDinD docker

Step-4: [Attach new Container(myDinD) in that Container install Docker again] {DOCKER 2 inside DOCKER1}

docker exec -it myDinD sh

Step-5: [Here Docker installed inside Container] (check in myDinD)

 docker info

All docker command run in myDinD that is 'Docker inside Docker'

  docker ps
  docker images
  docker pull docker

Step-6: [We also launch Docker in Containerized Docker] {DOCKER 3 inside DOCKER 2}

Command for run Container with --privileged:

  docker run -dit --privileged --name myDinD2 docker

Command for attach or get shell terminal of running Container:

  docker exec -it myDinD2 sh

Step-7: [Here All DinD setup Done]

1.Docker host (Docker 1)

2.myDinD container (Docker 2 inside Docker 1)

3.myDinD2 container (Docker 3 inside Docker 2)