Docker Labs for beginners

Set up  docker  on ubuntu


1.  Create  below shell script  and execute  that script

$ cat  install-docker.sh
#!/bin/bash
echo "installing docker"
apt-get update
apt-get install -y \
    apt-transport-https \
    ca-certificates \
    curl \
    software-properties-common
curl -fsSL https://download.docker.com/linux/ubuntu/gpg | apt-key add -
add-apt-repository \
   "deb https://download.docker.com/linux/$(. /etc/os-release; echo "$ID") \
   $(lsb_release -cs) \
   stable"
apt-get update && apt-get install -y docker-ce=$(apt-cache madison docker-ce | grep 17.03 | head -1 | awk '{print $3}')


$ chmod a+x install-docker.sh
$ sh install-docker.sh


2. Check if service is up  or not

$  systemctl status docker
$ systemctl start  docker

3.  Check docker version

$ docker --version

Task 1 :-               Hello World

In your Docker environment, just run the following command:

$ docker run busybox echo hello world

We ran a single process and echo'ed hello world.

$ docker  ps

No container

$ docker ps –a

You will see the stopped container

Task 2 :-  Interactive docker conatiner

$ hostname

$ docker run -it ubuntu bash

$ hostname

$ exit

$ docker  ps

No container

$ docker ps –a

You will see the stopped container

Task 3:- Run a container in the background

$ docker run -d pardeepvirdi/clock

$ docker  ps

  You can see  the container

Task 4  :-  Start container specific name

 $   docker run -d --name myclock  pardeepvirdi/clock

Task 5 :-  Port mapping

$ docker pull nginx

$ docker images

$ docker run -d -p 80:80  --name webserver-1  nginx

 $ docker run -d -p 70:80  --name webserver2  nginx

Lab 2 :-    Build container image

Step 1 :-  Create a separate folder  for this Lab

$ mkdir  example-docker

$ cd  example-docker

Step 2 :- create a new file with name Dockerfile and index.html using any editor

$ vi Dockerfile

FROM nginx:1.11-alpine

COPY index.html /usr/share/nginx/html/index.html

EXPOSE 80

CMD ["nginx", "-g", "daemon off;"]

$ vi index.html

“my  nginx  container”

Step 3 :- Now we build the image

$ docker build -t nginx-image:v01 .

Step 4  :- Run a container from image

$ docker run -d -p 80:80 nginx-image:v01