Qissmu

A very simple and dumb (K.I.S.S) script (easily hackable) for testing/bootstraping cloud-init QEMU VM (images).

Why: I like to make quick test of script, ansible-playbook, without bloating my os with libvirt and it's complicated network stack which modify your iptables or crazy ruby script like vagrant, or any big bloated thing like vbox...

Quick launch a VM for testing :

When you don't have time and just want a quick vm :

qissmu --distro debian12
RESIZE="32G" qissmu --distro debian12

Delete all cache/iso/images/hashes which is usually in .qissmucache of current dir

qissmu --clear

Usually you create a script with variables that setup the VM:

CLOUD_IMAGE="https://cloud.debian.org/cdimage/cloud/bullseye/latest/debian-11-genericcloud-amd64.qcow2"
HASH="https://cloud.debian.org/cdimage/cloud/bullseye/latest/SHA512SUMS"
VM_USER_NAME="testuser"
VM_USER_PASSWORD="1234"
VM_MEMORY_SIZE="4096"
RESIZE="4G"

source qissmu

# qissmu will create a variable: QISSMU_IP_ADDR
export QISSMU_IP_ADDR=${QISSMU_IP_ADDR}

# or

myscript $QISSMU_IP_ADDR

Network

By default bind ssh (22) to localhost on port 2222 (qemu user mode)

You can map port with bash array using qemu syntax:

NETWORK_USERMODE_PORTREDIR=(tcp::5432-:5432 tcp::443-:443 tcp::2222-:22 udp::53-:53)
qissmu

You can use an existing brige with -bridge

NETWORK_BRIDGE="br0"
qissmu --bridge

Example

#!/bin/bash

VM_USER_NAME="ansible_test"
VM_USER_PASSWORD="1234"
VM_MEMORY_SIZE="4096"
RESIZE="4G"
BTRFS_NOCOW=1
NETWORK_BRIDGE="mybridge0"

source qissmu --distro debian12 --bridge

source ./ansible.sh