dockerfiles

All the Dockerfiles I use for various purposes. More detailed usage instructions are at the top of each Dockerfile.

Methodology

In general I like to build all-in-one Dockerfiles for things like general software development and I like to use docker-compose for production environments so that things like databases, caching, media storage, workers, and web hosts are split into their own containers.

Multiline

I don't like having a lot of files that I COPY around and prefer writing multiline echos and sed commands to create and adjust configuration files. When heredocs are widely supported and not just in labs I plan on using that.

Containers all the way down

You'll notice that I have some commands laying around that look something like:

docker run -it --rm -v /var/run/docker.sock:/var/run/docker.sock alpine \
  sh -c "apk add docker curl && curl -o- https://raw.githubusercontent.com/overshard/dockerfiles/master/webdev/backup.sh | sh"

This runs a docker container that then does a curl command to then run a script that runs more docker containers. I like to keep all my scripts and code based on containers and be as multi-platform as possible. I use Linux, MacOS, and Windows daily and the only way to make things work on all platforms is to just run everything in containers and have docker installed everywhere.

I also really don't like batch and powershell scripts on Windows and prefer to just use shell scripts for everything.

Quick container

I sometimes setup a quick container to do test things on with:

docker run -td --restart unless-stopped --name alpine \
    -v "/var/run/docker.sock:/var/run/docker.sock" \
    alpine ash

Then you can enter it at anytime with:

docker exec -it alpine ash

Backup volumes

To copy data from a container to the host system while using docker volumes you can run something like this:

docker run --rm --volumes-from bythewood -v "${pwd}:/data" alpine \
    tar --exclude .venv --exclude node_modules --exclude media --exclude db.sqlite3 \
    -zcvf /data/bythewood-`date +%Y-%m-%d`.tar.gz /home/dev/.ssh /home/dev/code

NOTE: Instead of using ${pwd} you can also use a full path, on Windows it'd look something like "/C/Users/Isaac Bythewood/Documents/Backups:/data". The double quotes are important to prevent errors and use spaces in the path.

Volume location on Windows

You can easily get to docker volumes on Windows by typing the following in Explorer:

\\wsl$\docker-desktop-data\data\docker\volumes