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64 lines
2.2 KiB
Markdown
64 lines
2.2 KiB
Markdown
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# Get started with docker & docker-compose
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Installation instructions for Ubuntu Linux from: https://docs.docker.com/engine/install/ubuntu/
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## Uninstall old versions
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```sh
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sudo apt-get remove docker docker-engine docker.io containerd runc
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```
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## Install Docker
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```sh
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sudo apt-get update
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sudo apt-get install apt-transport-https ca-certificates curl gnupg-agent software-properties-common
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curl -fsSL https://download.docker.com/linux/ubuntu/gpg | sudo apt-key add -
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sudo add-apt-repository "deb [arch=amd64] https://download.docker.com/linux/ubuntu $(lsb_release -cs) stable"
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sudo apt-get update
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sudo apt-get install docker-ce docker-ce-cli containerd.io
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```
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## Install `docker-compose`
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From: https://www.digitalocean.com/community/tutorials/how-to-install-and-use-docker-compose-on-ubuntu-20-04
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```sh
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sudo apt-get remove docker-compose
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sudo curl -L "https://github.com/docker/compose/releases/download/1.27.4/docker-compose-$(uname -s)-$(uname -m)" -o /usr/local/bin/docker-compose
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sudo chmod +x /usr/local/bin/docker-compose
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sudo ln -s /usr/local/bin/docker-compose /usr/bin/docker-compose
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```
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## Usage
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Full docs are here: https://docs.docker.com/compose/reference/overview/
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Generally the idea of `docker-compose` command is simple:
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1. First you create a folder for your service, e.g. `home-assistant`
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2. Then you then create a `docker-compose.yml` file, which describes the service containers
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3. You run `docker-compose up -d` and you're done!
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Here are the most frequently used commands:
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#### Start a container
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`-d` starts in a detached mode - which basically mean that it runs it in the background (so you can do other stuff, instead of looking at the logs).
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```sh
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docker-compose up -d
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```
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### Stop a container
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There are 2 options:
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```sh
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docker-compose stop
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docker-compose down
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```
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First one (`stop`) onlu stops the containers, whereas the latter (`down`) does some more cleaning (removes the containers, networks, volumes), so I generally recommend `down` if you're tinkering.
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### Update a container to use the latest published image
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```sh
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docker-compose pull && docker-compose up -d
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```
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This pulls the latest images as defined in the local `docker-compose.yml` and recreates the containers.
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