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‫OK.

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‫This is me running through assignment 2. I've got three panes open here.

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‫I've got on my left where I can run the docker compose commands. You can see in this directory,

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‫it's the same directory you're starting with. The readme that tells me how to get through it.

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‫Then the Dockerfile that's empty and a docker compose file that's empty.

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‫Then on my right, I've got Vim opened so that I can see my files I need to edit up top. Then

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‫down below I have the instructions.

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‫First, I need to focus on the Dockerfile.

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‫It says I need to do a from drupal 8.2. Then I need to do a run to install Git. Apt get update.

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‫update.

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‫By the way, the install -y...the -y there

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‫means automatically say yes.

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‫And that way it'll auto...it won't prompt to install Git.

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‫And this talks about some proper cleanup.

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‫So any time you use apt-get, apt-get actually creates a cache when you do the apt-get update.

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‫So we really want to delete that cache because it's at least 10MB taking up our image that we

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‫don't need.

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‫In this case, I can use the backslash, which means include the next line in this command. And then

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‫the && symbols...or ampersand

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‫ampersands... are telling me that if the first command succeeds, then also do this one.

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‫And actually we have one right here.

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‫So that's actually the third command I'm going to be doing. Remove these specific files.

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‫That's a pretty common one. You see this in a whole lot of images.

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‫I just add it to all of my images just to keep them clean.

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‫It's not actually a requirement to make it function.

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‫It's just there to keep it clean.

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‫So we need to change the working directory for our template, or our themes.

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‫Then we're going to need to do a clone.

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‫I'm going to go ahead and...

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‫...copy that and paste it.

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‫If you're a Git person, you might see these are familiar. Git, obviously is pulling our...is cloning

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‫this particular Git repository down that is a template. It's using a specific branch. It's using these

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‫two variables, these two options here, that I've put in are there to tell it to only download the latest

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‫copy and only that particular branch. It basically saves you a whole lot of time.

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‫It actually saves you minutes on downloading Git repositories. If you only need the absolute latest commit,

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‫and all the files in it, and you only need a particular branch which is probably all you need when you're

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‫going to deploy an image.

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‫Because if we were going to change that, we would just build a new image. Right?

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‫So that's a good tip.

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‫In case you're using Git a lot for image building, it saves you a lot of time and space really because

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‫you don't need the whole history of the repository in there. You just need the latest commit.

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‫OK.

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‫Then the problem here is that these files...this is a common problem in Docker...that any commands you

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‫run here, they're all going to run as root.

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‫So these files were just downloaded and put in that directory as root.

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‫But the problem is is that the Apache web server expects those files to be the www data user.

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‫So I have to change the permissions afterward in order to make it work well.

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‫You don't have to know these commands.

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‫But this is a very common one shown, which stands for change owner. And -r means

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‫all files, including subdirectories and subfiles, to this user and this group.

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‫We'll confine it to just the directory we created.

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‫Save us a couple of microseconds. I then need to change my working directory back just in case

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‫the application expects to be in the working directory that it started in.

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‫I don't need to specify any other, like a cmd or anything, because those are already specified in the

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‫from image...

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‫the Drupal image that I'm pulling from. All right. Think I'm done there.

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‫Let's go to the Compose file.

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‫If you kept your file before, it might look something like this. Right?

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‫It has the services, and then it has the Drupal with the image name drupal, and then the volumes, and then

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‫the postgres, and the environment variable for the password.

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‫And then we define the volumes.

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‫What we have to do to make this work in this situation, according to our instructions,

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‫we need to rename the image.

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‫Any time there is, in a compose file, an image key and a build key, it changes the purpose of the image

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‫key.

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‫Now instead of us telling it, 'hey, I want you to download the Drupal official image' we're saying, once

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‫we add in the build, we're saying, 'hey, I want to build from a specific location on my local machine and

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‫then I want to call the image you build this image name.'

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‫Now, I don't actually have to specify the image name.

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‫I could delete the image line altogether and it would actually create an automatically named name based

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‫on the Compose naming, that you probably have noticed. Whenever you use Compose, it names everything to

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‫be friendly to that particular project.

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‫But, we're going to go ahead and hard code it in here.

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‫Notice I'm putting in a dot for build.

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‫That's just a shortcut, a shorthand for just saying, 'hey, just build in this directory and use the Dockerfile

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‫that's the default name.'

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‫I'm not giving it any build options. I'm not telling it a custom build file or custom location.

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‫I'm just telling it the simplest way, which is how we built it.

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‫All right. That's done.

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‫That should build a custom image based on my Dockerfile. Then down here in postgres, I need to actually

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‫put in a volume.

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‫We want it to preserve our data.

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‫The reason we want to preserve the data is if you're testing this, and you do a docker compose down,

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‫it will actually delete the database and then we won't...

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‫when we turn it back on, it won't have the data in there. So we want to ensure that we're keeping the

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‫data across Compose restarts.

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‫If we do a docker compose down now, after we have this data volume in there, it won't actually remove that

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‫data volume, unless we do a -v on the end, which tells it, 'hey, I also want to delete the volumes.'

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‫I think that's right.

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‫Drupal data var lib postgres

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‫SQL data.

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‫All right.

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‫Then I need to also put that down here.

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‫Data.

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‫All right.

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‫I think we're ready.

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‫Saving my files.

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‫Let's see if we can do a docker compose up. OK, let's check our browser localhost 8080.

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‫All right.

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‫If this all worked, I can walk through this install like we did before

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‫and postgres postgres

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‫mypasswd

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‫postgres. Save and continue. I'm going a little fast this time because I figure you've done it before.

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‫I'm going to configure the site real quick.

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‫OK.

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‫We're on the site, and the instructions tell us to go to the appearance tab and notice we're on the

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‫Bartik default.

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‫We had this uninstalled theme down here that wouldn't have existed had we not installed it with

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‫our image.

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‫I can click install and set as default.

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‫Then click back to site.

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‫I have a totally new theme on my site using the bootstrap framework from Twitter which is a pretty

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‫popular

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‫templating system for CSS and websites.

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‫So,

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‫everything works as it should.

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‫If I went back and actually stopped this, abort it, and then did a down, it's actually going to delete

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‫the images.

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‫But remember, it's not going to delete the data.

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‫If I did a docker compose up again, what should happen is all those config files in the Drupal modules

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‫and profiles, and sites, and themes, and then the data that's actually in the database, should all still

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‫be there.

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‫I should be able to hit refresh and it still works.

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‫What's great about this way is that you can actually keep your images and your containers relatively

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‫clean.

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‫That way, when you're shifting between projects, you could technically get rid of that stuff and just

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‫leave it alone...the volumes...the volumes alone...don't delete the data in them. Just leave the volumes

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‫alone and don't delete their data.

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‫Then when you come back to the project, you've already got all the sample data already in there and

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‫you don't start from scratch.

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‫All right. That's it.