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‫Now that you've seen all the ways to create secrets in our stack, I'm going to give you a little

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‫assignment on using secrets with a previous stack you've used.

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‫You remember our friend Drupal, the compose file we used earlier, in compose assignment 2.

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‫I want you to take that, and we're going to actually extend it and make it stack ready.

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‫First, we're not going to build a custom image right now.

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‫We're just going to use the default Drupal.

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‫Then you would need to remove the build section from your compose file. Then I'd like you to

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‫add the secret at the bottom, and when you do that, instead of using a file-based secret, put in external.

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‫You can also look that up in the resources for this section.

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‫It'll be the documentation on Docker's website all about secrets.

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‫It'll show you the formatting in there of a compose file. So you use external, which means we actually

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‫have to use the CLI to put that secret in. Then you're going to pass the password file,

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‫that is the secret file, into postgres, using the environment variable.

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‫So, you'll need to add that to the postgres section.

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‫Then before we actually deploy the stack, you need to actually put the secret into the swarm.

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‫This will be a case where we're not using a secret file. We're simply going to manually, as an operator,

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‫add the secret to our swarm. Then in the stack file,

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‫we're going to actually specify that, using the external at the bottom.

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‫Once you've got it all edited the way you think it's correct and you're ready to test it, just copy it

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‫into a new YAML file on your swarm node1. Try and do a stack deploy and see if it works.

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‫You may not get it right the first time, and that's fine.

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‫A lot of times I won't either.

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‫I have to go back and revise it, and then try a deployment again. The errors that you'll get back

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‫are usually pretty good at telling you what your problems are.

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‫For me, it's usually that my YAML isn't formatted correctly or something silly like that.

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‫If you have any issues, don't hesitate to just watch the video after this where I actually walk through

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‫this assignment for you.

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‫But I think your brain will work better if you try it yourself and get your mind working about how you

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‫would actually solve this assignment yourself.

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‫Good luck, and I'll see in the next lecture.