- A Cloud Guru
Managing Docker Containers
In the modern environment, being proficient at managing containers is an essential skill. In this activity, you will use Docker container management skills to start and stop containers based on images, add and remove images and containers, and monitor and update containers. Completing the lab will demonstrate basic Docker container management skills.
Table of Contents
Practice Docker by Running the hello-world and busybox Images
If docker is installed and the docker.service enabled, then a great way to test the ability to run a container is to use the docker subcommand
runwith a simple image like
hello-world. The busybox image is another simple image that we will pull and
runa command in. The
pssubcommand is useful for viewing running or all containers, and images will list the images in the local repository. Using the
rmsubcommand we can remove containers and with
sudo -i docker run hello-world docker run --name hi hello-world docker search busybox docker pull docker.io/busybox docker run --name busy -it busybox /bin/sh exit docker ps -a # shows a <name> for hello-world docker rm <name> docker rm hi docker ps -a docker images docker rmi hello-world docker images
Create an apache2 Container Based On the Image httpd:2.4 Mapping localhost:8080 to the Container Port 80
docker runto create a container named
apache2, based upon the
httpd:2.4image, and map the HTTP port with
docker run --name apache2 -p 8080:80 httpd:2.4 #Use CTRL+C to exit output from running container docker ps docker ps -a docker start apache2 docker logs apache2 docker stats apache2 CTRL+C lynx -dump http://localhost:8080
In the apache2 Container, Update the Default index.html file, Then Verify and Commit the Changes
docker exec -it apache2 bash ls cd htdocs echo 'apache2 container' > index.html exit lynx -dump http://localhost:8080 docker commit -m 'Updated index.html' apache2
Restart the apache2 Container and Verify Changes Are in Effect
docker ps docker stop apache2 docker ps -a docker start apache2 lynx -dump http://localhost:8080
What's a lab?
Hands-on Labs are real environments created by industry experts to help you learn. These environments help you gain knowledge and experience, practice without compromising your system, test without risk, destroy without fear, and let you learn from your mistakes. Hands-on Labs: practice your skills before delivering in the real world.