I don't get docker compose and Laravel; why multiple containers?

@Sinnbeck this is great, thanks Sinnbeck.

And in local dev/production do you have a 'workflow' of sorts for Laravel + Docker + Docker Compose?

In the Docker video series I saw the trainer create a 'temp' container for composer and then destroy it once it did its job the first time. Do you, or someone on the forum, know what's happening when in this situation? So a little linux box is created with just composer and it's networking in to the other containers? And then the linux box/container gets deleted?

@luke2020 If you check my guide linked in my post that is actally the first item :) It downloads the composer image, runs it to install laravel, and has it remote itself (the --rm flag)

@Sinnbeck haha, sorry. I clicked the link to read later so I could come back here check the replies.

I'll get reading!! :-)

@luke2020 But of course you can do the same without lando if you want.

This will just install laravel :)

SITENAME=my-app; docker run --rm --interactive --tty \
  --volume $PWD:/app \
  --user $(id -u):$(id -g) \
  composer create-project laravel/laravel $SITENAME ^9.0

@johnDoe220 Its good practice to link to where you took the text from, in case you didnt write it yourself :)

https://www.digitalocean.com/community/tutorials/how-to-containerize-a-laravel-application-for-development-with-docker-compose-on-ubuntu-18-04

@Sinnbeck The reason for this problem is that when I put a link in the reply, it does not appear or the changes are not applied after editing, I find it strange, I even changed the profile picture many times, but it does not change

@johnDoe220 Strange. I have seen you post links before so you shouldnt be limited :)

@Sinnbeck Yes, of course when I use a filter breaker!

Thanks @sr57. Is this what you're referring to? https://linuxcontainers.org/

So, you would have a vm on aws/gcp and use Lxc on the VPS? do you have a workflow for Laravel or is it easy enough can get start looking at it?

@luke2020

Is this what you're referring to? https://linuxcontainers.org/

Yes.

it easy enough can get start looking at it?

Not to difficult, but Docker is/should be easier as it's a layer above, I used Lxc before the creation of Docker,. Today I suggest you to 'play' in dev/test first with virtualbox, then Docker and then Lxc if you want some 'resources optimized' in prod server.

@luke2020 Networking in docker is quite complex. But if you are working on a single project and you are using docker-compose, then each container in that project can talk together. To make this simple, each container exposes a name. By default this is the name of the service. So if I make a service called mysql, then I will contact that from my php container, using the hostname mysql

If you need to communicate between projects, it gets quite complex, and you will need to manually specify a common network and how it all connects.. Or use lando as it works here out of the box (using the traefik proxy)

@Sinnbeck ah ok, so it's like an alias?

so one project that uses multiple containers will leave docker to network those containers together and give me a named alias (php if i call my php container the name php and so on), and i don't have to worry about the wiring at the lower level.

great, that makes a lot of sense

@luke2020 Exactly. But be aware that your containers arent open to your host machine unless you tell it to :) You expose the port (like 80 for the webserver, 3306 for the mysql db if you need to connect to it from a database manager etc)

@Sinnbeck Understood. And this is helping me understand what's happening with using a container image with Cloud Run.