Freeing up Disk Space when using Docker

 Turns out there's a lot of temporary data that is used by Docker. To clean it up, try the following (courtesy Mr Davron):

1. Open an elevated Powershell or CMD prompt
2. `docker system prune --all`
3. Right mouse click on docker desktop in system tray -> quit
4. `wsl --shutdown`
5. `Optimize-VHD -Path "$env:LOCALAPPDATA\Docker\wsl\data\ext4.vhdx" -Mode Full`
6. Reboot

This freed up about 25GB on my machine.

Using Ansible in Docker (without installing Ansible)

tl;dr:

Powershell:

docker run --rm -v ${PWD}:/ansible/playbooks sweenig/ansible-docker playbook.yml -i inventory

Linux:

docker run --rm -v $(pwd):/ansible/playbooks sweenig/ansible-docker playbook.yml -i inventory

I love Ansible. I love Docker. Running Ansible in Docker not only makes me melt but it means I don't have to install anything but Docker to run Ansible. Anywhere Docker works, Ansible works. And since I already have Docker installed on any machine I call mine...

I built a lab that shows how this can be used. The lab spins up 4 Ubuntu servers, then uses Ansible in a docker container to install a few things. Here's the shortcut to get everything up and running if you already have Docker installed:

> docker run -it --rm -v ${HOME}:/root -v ${PWD}:/git alpine/git clone https://github.com/sweenig/docker-ansible-playbook.git
> cd .\docker-ansible-playbook\ansible_lab\
> docker compose up -d
> docker run --rm -v ${PWD}:/ansible/playbooks --network=ansible_lab_default sweenig/ansible-docker playbook.yml -i inventory

With these four commands, you:

• Pull down the lab files
• Switch into the lab directory
• Start up 4 containers (the equivalent of starting up 4 micro VMs)
• Run the Ansible playbook

You used Git and Ansible and had neither installed.

To shut down the lab, do:

docker compose down

In the ansible-lab directory.