https://github.com/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".
https://github.com/pratikshinde55/docker-in-docker-onaws

docker-in-docker

Last synced: 3 months ago
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launch Docker Container and in this launched Container again install Docker and launch Docker Container in it. "Docker containers inside another Docker container".

• Host: GitHub
• URL: https://github.com/pratikshinde55/docker-in-docker-onaws
• Owner: Pratikshinde55
• Created: 2024-02-13T12:21:13.000Z (over 1 year ago)
• Default Branch: main
• Last Pushed: 2024-09-24T13:26:15.000Z (8 months ago)
• Last Synced: 2025-01-13T16:50:34.292Z (4 months ago)
• Topics: docker-in-docker
• Homepage:
• Size: 39.1 KB
• Stars: 1
• Watchers: 1
• Forks: 0
• Open Issues: 0
• Metadata Files:
  • Readme: README.md

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README

        
# Docker inside the Docker

![Screenshot 2024-02-13 152226](https://github.com/Pratikshinde55/Docker-in-Docker/assets/145910708/ec612dc0-eeb1-4933-bf73-cb839fab7d49)

### 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

        

![Screenshot 2024-02-13 155059](https://github.com/Pratikshinde55/Docker-in-Docker/assets/145910708/f3fd7600-aa03-4830-8380-dc48c2c91dfc)

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

    

    docker exec -it myDinD sh

![Screenshot 2024-02-13 155842](https://github.com/Pratikshinde55/Docker-in-Docker/assets/145910708/6a0d7150-cb53-47a2-974a-5189da2b77e2)

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

       

     docker info

![Screenshot 2024-02-13 160449](https://github.com/Pratikshinde55/Docker-in-Docker/assets/145910708/6df91207-4833-4ad1-9e08-32f5c895616d)

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

     

      docker ps

      docker images

      docker pull docker

![Screenshot 2024-02-13 160549](https://github.com/Pratikshinde55/Docker-in-Docker/assets/145910708/de5d86f7-d97a-4682-b0a3-012eedacb2b2)

### 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

![Screenshot 2024-02-13 161159](https://github.com/Pratikshinde55/Docker-in-Docker/assets/145910708/03ded95f-78d3-4178-a174-2146ab465d75)

### 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)

![Screenshot 2024-02-13 162357](https://github.com/Pratikshinde55/Docker-in-Docker/assets/145910708/c0dfea90-e5a4-4bf7-aae4-a974d1a839e1)