Build and Manage a Custom Container

This lab will take you through the process of building and customizing an Nginx container on your local machine. This is an important first step to deploying a container.

Step 1: Run the Base Container

The official nginx container is lightweight and comes with a default webpage. The following command runs the container in the background (-d), connecting container port 80 to host port 8080 (-p 8080:80) and with the name my_nginx (--name):

$ docker run -p 8080:80 --name=my_nginx -d nginx:stable 

Verify that the container is running:

$ docker ps 
CONTAINER ID        IMAGE               COMMAND                  CREATED             STATUS              PORTS                  NAMES
acb90cccb559        nginx:stable        "/docker-entrypoint.…"   3 seconds ago       Up 2 seconds        0.0.0.0:8080->80/tcp   my_nginx

Make sure you are forwarding to the correct port. If all looks well you should be able to see nginx’s default page on the following URL:

If you can see the page you’re ready to move on. You won’t need the nginx container anymore so stop it and delete it:

$ docker stop my_nginx 
$ docker rm my_nginx

Step 2: Build a Custom Container

Now we’ll use a Dockerfile to customize the HTML in the container. In a directory by itself create a Dockerfile with the following contents:

FROM nginx:stable 
COPY index.html /usr/share/nginx/html/index.html

Now create an index.html file in the same directory with a simple message.

<html>
<h1>Hello CIS-192 World!</h1>
</html>

With those two files in place build the custom container:

$ docker build -t myweb:test1 . 

You should now have a custom image built. Verify that you do with the command:

$ docker image ls 
REPOSITORY                       TAG                 IMAGE ID            CREATED              SIZE
myweb                            test1               e266f5ae5b64        About a minute ago   133MB
nginx                            stable              20ade3ba43bf        2 days ago           133MB
docker/whalesay                  latest              6b362a9f73eb        5 years ago          247MB

Step 3: Launch Your Image

You can now create a container based on your image the same way you launched the base nginx image:

$ docker run -p 8080:80 --name=my_nginx -d myweb:test1 

Verify that your image is running by browsing to:

Take a screenshot

Turn In

Turn in a screenshot of your custom container running.