After creating your EC2 instance and connecting using PuTTY, this tutorials shows steps on how to run docker and setup a test Apache site using a docker image. This tutorial aims to introduce the basic operation of docker and how to use it on a Linux environment.
1. Connect to your EC2 Ubuntu instance via SSH.
2. Run apt update to get the latest package definitions.
# apt update
3. Install docker.io package using apt.
# apt install docker.io
4. After installing docker, use docker search to search for the Apache docker image.
# docker search apache
5. Download the Apache docker image using docker pull.
# docker pull apache
6. View all your available docker images using the docker image command.
# docker images
7. Create and run a docker container based on the Apache image
# docker run -itd --name=apache --hostname=webserver -p 80:80/tcp httpd
-itd = interactive, tty allocated, detach run
-p = publish port (container port):(host port)/protocol
–name = new container name
–hostname = new container hostname
8. Check the running docker containers.
# docker ps
9. Go to a web browser and type on the URL tab the Public IP address of your EC2 instance. You should see the apache test page ” It works!”.
10. To modify this page, connect to this docker container using docker exec command.
# docker exec -it apache /bin/bash
11. Navigate to the apache doc root to modify the index.html file.
# cd /usr/local/apache2/htdocs
12. Update the index.html file using the echo command.
# echo "This is my test website. - masterkenneth" > index.html
13. You can exit from docker by just using the exit command
14. Now refresh your Webpage and confirm that you have updated your webpage.
This is just a very simple test and introduction to docker. Docker has more features that are just waiting to be explored. See this post for essential docker commands.