Run docker in lxc proxmox

Run_docker_in_lxc_proxmox.md

1. On the Proxmox host, edit /etc/modules-load.d/modules.conf to add these modules:

aufs
overlay

2. Reboot or load the modules using modprobe:

modprobe aufs
modprobe overlay

3. Create a unprivilegd container in Proxmox, don't start it
4. Go to the container options and enable the features nesting and keyctl or manually this line to the config file:

features: keyctl=1,nesting=1

5. Start the container
6. Install required software

sudo apt update && apt upgrade -y
sudo apt install apt-transport-https ca-certificates curl gnupg2 software-properties-common

7a. apt config for debian

curl -fsSL download.docker.com/linux/debian/gpg | sudo apt-key add -
sudo add-apt-repository "deb [arch=amd64] https://download.docker.com/linux/debian $(lsb_release -cs) stable"

7b. apt config for ubuntu

curl -fsSL download.docker.com/linux/ubuntu/gpg | sudo apt-key add -
sudo add-apt-repository "deb [arch=amd64] https://download.docker.com/linux/ubuntu $(lsb_release -cs) stable"

8. Install the docker software

sudo apt update
sudo apt install docker-ce docker-ce-cli containerd.io docker-compose

9. Running and managing docker containers requires sudo privileges. If you don’t want to type sudo for every commmand, add your current user to the docker group.

sudo usermod -aG docker ${USER}