1. Docker on Linux (Linux containers only)

• Installation:
  • sudo apt install docker.io
  • sudo usermod -aG docker $USER (to manage Docker as a non-root user)
  • Reboot (because log out is not enough…)

2. Docker on macOS (Linux containers only)

• Installation: https://www.docker.com/products/docker-desktop
• Then in menu ‘Preferences…’ —> ‘Resources / ADVANCED’ —> change CPUs (2) and Memory (4.00 GB)

3. Docker on Windows (Linux containers OR Windows containers !)

• Installation: https://www.docker.com/products/docker-desktop —> IMPORTANT: uncheck 'Use WSL 2 instead of Hyper-V’
• Reboot
• When you start Docker for the first time, by default you are in ‘Linux containers’ mode
• Then in menu ‘Preferences…’ —> ‘Resources / ADVANCED’ —> change CPUs (2) and Memory (4.00 GB)
• You can switch from ‘Linux containers’ mode to ‘Windows containers’ mode using the menu ‘Switch to Windows containers…’ <—> ‘Switch to Linux containers…’ (right click on Docker instance) —> existing containers will continue to run, but you will not be able to manage them until you switch back and no data will be lost

edit ‘C:\Users\your_username\.docker\windows-daemon.json’ and change (or add) the next line: “exec-opts”: [“isolation=process”], (with the comma at the end of the line) to activate shared kernel (process) instead of VM (hyperv)

add also the next line: “storage-opts”: [“size=50GB”], (with the comma at the end of the line)

restart Docker

to verify, open ‘cmd.exe’: docker info —> see line ‘Default Isolation: process’ (for shared kernel) and no ‘Default Isolation: hyperv’ (for VM)