Here we’re going to build a simple docker container that is running apache web server and then access it from your laptop’s web browser.
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First off, pull down the ubuntu image, by running:
$ docker pull ubuntu Using default tag: latest latest: Pulling from library/ubuntu ae79f2514705: Pull complete 5ad56d5fc149: Pull complete 170e558760e8: Pull complete 395460e233f5: Pull complete 6f01dc62e444: Pull complete Digest: sha256:506e2d5852de1d7c90d538c5332bd3cc33b9cbd26f6ca653875899c505c82687 Status: Downloaded newer image for ubuntu:latest
Then confirm that you have this image now:
$ docker images REPOSITORY TAG IMAGE ID CREATED SIZE ubuntu latest 747cb2d60bbe 4 days ago 122MB
Next we need to create a new container which runs the bash terminal in interactive mode. We need to expose port 80 for this container, then we need to map one of our host’s port (e.g. 8080) to the new exposed container port 80.
$ docker run -p 8080:80 -it ubuntu /bin/bash root@f5842a8d0c33:/#
Note: I’m using a ubuntu image for this example. I normally prefer to use centos, but I ran into a weird bug when using the centos image, so used ubuntu.
I’m now inside this container as indicated above. If you want to exit the container, you simply do:
root@f5842a8d0c33:/# exit exit
However that ends up stopping your container altogether:
$ docker ps CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES
To start up this particular container, we first find it’s id:
$ docker ps -a CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES f5842a8d0c33 ubuntu "/bin/bash" 3 minutes ago Exited (0) 2 minutes ago naughty_shockley
Then start it by running:
$ docker start f5842a8d0c33 f5842a8d0c33
Now confirm that your container is running:
$ docker ps CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES f5842a8d0c33 ubuntu "/bin/bash" 11 minutes ago Up 4 minutes 0.0.0.0:8080->80/tcp naughty_shockley
Notice here, that the portwording is also defined.
Now let’s log into our docker container:
$ docker exec -it f5842a8d0c33 /bin/bash root@f5842a8d0c33:/#
Next we do an apt-get update:
root@f5842a8d0c33:/# apt-get update Get:1 http://security.ubuntu.com/ubuntu xenial-security InRelease [102 kB] Get:2 http://archive.ubuntu.com/ubuntu xenial InRelease [247 kB] Get:3 http://security.ubuntu.com/ubuntu xenial-security/universe Sources [50.1 kB] Get:4 http://archive.ubuntu.com/ubuntu xenial-updates InRelease [102 kB] Get:5 http://archive.ubuntu.com/ubuntu xenial-backports InRelease [102 kB] Get:6 http://archive.ubuntu.com/ubuntu xenial/universe Sources [9802 kB] Get:7 http://security.ubuntu.com/ubuntu xenial-security/main amd64 Packages [471 kB] Get:8 http://security.ubuntu.com/ubuntu xenial-security/restricted amd64 Packages [12.8 kB] Get:9 http://security.ubuntu.com/ubuntu xenial-security/universe amd64 Packages [219 kB] Get:10 http://security.ubuntu.com/ubuntu xenial-security/multiverse amd64 Packages [2930 B] Get:11 http://archive.ubuntu.com/ubuntu xenial/main amd64 Packages [1558 kB] Get:12 http://archive.ubuntu.com/ubuntu xenial/restricted amd64 Packages [14.1 kB] Get:13 http://archive.ubuntu.com/ubuntu xenial/universe amd64 Packages [9827 kB] Get:14 http://archive.ubuntu.com/ubuntu xenial/multiverse amd64 Packages [176 kB] Get:15 http://archive.ubuntu.com/ubuntu xenial-updates/universe Sources [221 kB] Get:16 http://archive.ubuntu.com/ubuntu xenial-updates/main amd64 Packages [831 kB] Get:17 http://archive.ubuntu.com/ubuntu xenial-updates/restricted amd64 Packages [13.5 kB] Get:18 http://archive.ubuntu.com/ubuntu xenial-updates/universe amd64 Packages [691 kB] Get:19 http://archive.ubuntu.com/ubuntu xenial-updates/multiverse amd64 Packages [17.5 kB] Get:20 http://archive.ubuntu.com/ubuntu xenial-backports/main amd64 Packages [5176 B] Get:21 http://archive.ubuntu.com/ubuntu xenial-backports/universe amd64 Packages [6354 B] Fetched 24.5 MB in 17s (1408 kB/s) Reading package lists... Done
Now install apache2:
root@f5842a8d0c33:/# apt-get install apache2 -y
Now start apache:
$ root@f5842a8d0c33:/# apachectl start AH00558: apache2: Could not reliably determine the server's fully qualified domain name, using 172.17.0.2. Set the 'ServerName' directive globally to suppress this message
Also enable the service:
root@f5842a8d0c33:/# systemctl enable apache2 apache2.service is not a native service, redirecting to systemd-sysv-install Executing /lib/systemd/systemd-sysv-install enable apache2
Next go to your laptop’s web browser and open http://localhost:8080/.
You should see your an ubuntu/apache welcome page.
This is a quick and dirty way to get off the ground with this work.