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‫All right. For this assignment, I want you to go through the actions of creating a compose file from scratch.

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‫This is a very normal, everyday, basic compose file. It's an exercise you'll go through a lot in

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‫building on applications that you need to work on, or test, or develop on.

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‫As you get used to Compose, you'll actually kind of prefer it locally. It's just so easy to use and

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‫it makes the docker commands so much easier to remember

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‫inside of that compose file.

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‫On this one, you're actually going to build a basic Drupal content management site.

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‫If you're not familiar with Drupal, it's an open source content management server, which is basically

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‫just a website builder. You don't have to know a lot about Drupal, but it's a good example of a fully

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‫functional web app, and it needs a database running behind it.

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‫You're going to need to look up the Drupal images, and the postgres image on Docker Hub, and read

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‫a little bit through their documentation.

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‫Of course I recommend using the official images, and there are some other things there. You'll want to

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‫use the ports inside the compose file to actually expose Drupal.

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‫I recommend just doing it on 8080. You can really do it on any port you want, but let's just pick 8080 for

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‫this assignment.

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‫You're going to end up with two services. I recommend version 2 at the very top your file. You'll have

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‫those two services underneath it. One for Drupal, one for postgres. You can call the services whatever

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‫you want. Inside the postgres service, you're going to need to make sure you set a password for it.

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‫And then the way that Drupal works is that once you've started it with docker compose up, you'll actually

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‫open up your browser and walk through the setup. Drupal has a nice, web-based setup. It'll ask you some

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‫questions.

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‫A tip there is that the way these containers work in compose files is, remember, that it uses the

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‫service name as the DNS name for one container to talk to the other.

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‫As you're setting it up, one of the options you'll see under advanced is where the database server

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‫is. It defaults to localhost, and that's not going to work because that would mean that you'd have

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‫to have your database and your web server in the same container.

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‫And that's not really a best practice for Docker.

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‫In that case, you're going to need to change the localhost to whatever you call the Drupal service.

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‫Then the Drupal web server will actually talk over the Docker network to the database server.

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‫If you want to go a little bit extra credit, there's an option

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‫that you'll see on the Drupal documentation on Docker Hub, about using volumes to store the unique data, like

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‫the template data, and the uploads, and the add-ons for Drupal that are called modules, you'll see that

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‫some documentation around that. I recommend you experiment with that and see if you can get it working

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‫in the compose file.

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‫Then after you started it, going and listing out the volumes to see if you can see them there, and that

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‫they look correct.

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‫This should be a fairly short compose file, probably 10 or so lines.

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‫Of course, if you get stuck, no worries. The next lecture will have me walking through the same exercise

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‫you're about to go through.

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‫So, good luck, and have some fun.