How to use LXD (Linux containers) in a shell script to create VM when the cloud instance launches

To use LXD (Linux containers) in a shell script to create a virtual machine (VM) when a cloud instance launches, you can follow these steps:

1. Install LXD on the cloud instance. You can do this by running the following command:

sudo apt-get update
sudo apt-get install lxd

2. Initialize LXD on the cloud instance by running the lxd init command. Follow the prompts to set up the storage backend and network bridge for the containers.

3. Create a shell script that uses the lxc command to create a new container and start it. For example:

#!/bin/bash

# Create a new container
lxc launch ubuntu:18.04 myvm

# Start the container
lxc start myvm

4. To run this script automatically when the cloud instance launches, you can add it to the /etc/rc.local file. This file is run by the init system at startup, so any commands in this file will be executed automatically.