kvmgr

kvmgr is a humble shell script for quickly deploying Ubuntu VMs to a local KVM system.

Usage

The script is meant to be simple to use. The only strictly required parameter is the hostname for the new VM.

./kvmgr.sh --name my-cool-virtual-machine

Parameters

To specify the VM configuration the other command line parameters can be used:

Flag	Keyword	Default Value
-c	--cpus	1
-m	--mem	512
-d	--disk	8G
-i	--net	default (libvirt NAT)
-o	--os	focal
-n	--name

Examples

1. Create a lightweight virtual machine using the latest LTS version:

    kvmgr.sh --cpus 1 --mem 512 --disk 5G --os focal --name lightvm
   

2. Create a more powerful virtual machine using an earlier LTS distro:

    kvmgr.sh --cpus 4 --mem 8192 --disk 60G --os bionic --name appserver1
   

3. Create a VM with the same options, but using the shorthand flags:

    kvmgr.sh -c 4 -m 8192 -d 60G -o bionic -n appserver2
   

Config Files

defaults.conf

All of the default values can be tweaked by editing the defaults.conf file to set custom defaults.

user.conf

To configure the user authentication, create a user.conf file in the same directory. This file specifies three main parameters.

• AUTH_PASSWD - The password for the default ubuntu@host user, meant for console login.
• AUTH_USERNAME - A user that will be created in the VM, meant for remote login with SSH.
• AUTH_PUBKEY - The SSH public key that will be added to the VM user.

An example of the user.conf file:

AUTH_PASSWD="changeme"
AUTH_USERNAME="gablogian"
AUTH_PUBKEY="ssh-ed25519 AAAAC3Nxxxxxx"