atifgit25 / docker-k8s

Docker : Documented By :- Rizwan

How to install Docker ?

Install Docker on Ubuntu : PROD

A. Set up the repository

1. Update the apt package index and install packages to allow apt to use a repository over HTTPS

sudo apt-get update

sudo apt-get install \
    ca-certificates \
    curl \
    gnupg \
    lsb-release

2. Add Docker’s official GPG key

sudo mkdir -p /etc/apt/keyrings

curl -fsSL https://download.docker.com/linux/ubuntu/gpg | sudo gpg --dearmor -o /etc/apt/keyrings/docker.gpg

3. Use the following command to set up the repository

echo \
  "deb [arch=$(dpkg --print-architecture) signed-by=/etc/apt/keyrings/docker.gpg] https://download.docker.com/linux/ubuntu \
  $(lsb_release -cs) stable" | sudo tee /etc/apt/sources.list.d/docker.list > /dev/null

B. Install Docker Engine

• Update the apt package index, and install the latest version of Docker Engine, containerd, and Docker Compose

sudo apt-get update

sudo apt-get install docker-ce docker-ce-cli containerd.io docker-compose-plugin

C. Verify that Docker Engine is installed correctly by running the hello-world image

sudo service docker start

sudo docker run hello-world (optional)

to verify the docker version use docker version CMD

for socket error give the executable permission sudo chmod 777 /var/run/docker.sock

Install Docker on Ubuntu With Single Line Command : POC

sudo apt install docker.io # version 20.10.12-0ubuntu2~20.04.1

Docker Practical 1] : Pull Official Image From Dockerhub & Run on your VM

1. Using docker, pull the latest version of nginx

docker pull nginx

2. Verify that the image was pulled successfully

docker images

3. Run the container using the nginx image

docker run --name nginx -p 8080:80 -d nginx

4. Check the status of the Running container

docker ps

5. Verify connectivity to the nginx container through UI

< PUBLIC_IP_ADDRESS OF VM >:8080

6. access your docker container

docker exec -it < container name > /bin/sh

7. Stop the container

docker stop < container name >

8. To Verify Stop Container Status & the container has been removed

docker ps -a

9. Remove Images

docker rmi < image-id >

Docker Practical 2] :

a) create your own docker image
b) run as container
c) push to your Docker hub Registry

• Sign in to Docker Hub : & create account Docker Hub

• Run & Stop the Container

docker run --name nginx -p 8080:80 -d nginx

• exec the container and see the index.html file in given path /usr/share/nginx/html

docker ps

docker stop nginx

• create one folder and create Dockerfile and custom index file
• build custom docker image and run the container

docker build -t <dockerhub_id>/nginx_doc:v1 .

• verify the image

docker images

• run the container

docker run --name new_nginx -p 8081:80 -d <dockerhub_id>/nginx_doc:v1

• Login To Dockerhub

docker login

provide USERNAME and PASSWORD

• push the image to dockerhub

docker tag <dockerhub_id>/nginx_doc:v1 <dockerhub_id>/nginx_doc:v1-new
docker push <dockerhub_id>/nginx_doc:v1-new

• verify from Dockerhub registry Dockerhub Repo

To RUN static website in a container

docker run --name static-site -e AUTHOR="Your Name" -d -P dockersamples/static-site

if you want to specify perticular port

docker run --name static-site-2 -e AUTHOR="Your Name" -d -p 8888:80 dockersamples/static-site