MusicDB Test VMs

To test MusicDB I created some VMs with different Linux distributions. Most time I test on my productive installation.

To run a test system execute the following line:

qemu-system-x86_64 -hda $SYSDISK -hdb MusicDB.cow -hdc music.cow -m 1024 -net user,hostfwd=tcp::10022-:22 -net nic -enable-kvm

qemu Installation

Basic Setup

# Install qemu
pacman -S qemu-headless

# Create a VM directory for BTRFS
mkdir /data/vms
chattr +C /data/vms
chown user:user /data/vms

Disk Images

I use multiple images to make the test environment more composable:

  • System image: $DISTNAME.cow

  • Music collection: music.cow (mount read only to allow multiple OSs to access that device)

qemu-img create -f qcow2 /data/vms/$DISTNAME.cow 20G
qemu-img create -f qcow2 /data/vms/music.cow 10G

System Setup

All system installations have the following setup:

  • Language: English (Location: Germany/Berlin, Locales: de_DE.UTF-8)

  • User: user:user with id 1000:1000 and group

  • Patitioning: Using the assistant; home on same partition; for the distribution recommended setup.

  • Installation: Minimal system. No GUI if possible.

Task to do for each new system:

  • Install: vim, git

  • edit fstap:

    • music-disk: /data/music

mkdir -p /data/music

Installing/Updating MusicDB Test Environment

icecast is not needed because it only handles encryption what is not necessary for test runs.

# download
mkdir /src
cd /src
git clone git@m45ch1n3.de:/data/git/musicdb.git

cd /src/musicdb/scripts
./check.sh     # Then install all missing dependencies
./install.sh

Create Dummy Files

The following code shows, how to create a simple fake song. To create a complete fake album, the script testenv/mkalbum.sh can be used. Before executing the it, edit the variables at the beginning of the script.

# Generate 3 minutes and 37 seconds silence
sox -n -r 44100 -c 2 silence.wav trim 0.0 3:37

# Encode it as mpeg3
lame silence.wav

# Set meta data
id3edit --create --set-name "Silence" --set-album "Full of Null" --set-artist "Lame Sox" --set-release "2017" --set-track "01/10" --set-cd "1/1" silence.mp3

Test Systems

Debian

Version: 9.1.0 AMD64

I used a qemu installation with GUI on my development PC to install Debian. Later I copied the debain.cow image onto my workstation and use it via qemu-headless.

Selected Software: web server, SSH server, standard system utilities. NO desktop or print server.

# Download
wget https://cdimage.debian.org/debian-cd/current/amd64/iso-cd/debian-9.1.0-amd64-netinst.iso

# Install
qemu-system-x86_64 -cdrom debian-9.1.0-amd64-netinst.iso -hda debian.cow -boot order=d -m 1024

# Setup (first run)
qemu-system-x86_64 -hda debian.cow -m 1024 -net user,hostfwd=tcp::10022-:22 -net nic -enable-kvm
ssh user@localhost -p10022

Attention

After installing MPD, the daemon gets started via systemd (enabled!!)

So, after installing MPD run the following commands:

systemctl stop mpd
systemctl disable mpd

Attention

On Debian, the icecast executable is called icecast2, not icecast

Attention

On Debian, uses the ancient Python 2 when calling python! m(

Raspian

TODO https://azeria-labs.com/emulate-raspberry-pi-with-qemu/

Arch Linux

Version: latest (x86-64)

Compared to my development system that is also Arch Linux, this is only a minimal installation. It also does not have an icecast installation. So, this is the minimum environment MusicDB must have to run.

Selected Software: base, base-devel, vim, git, openssh, ifplugd

# Download
wget https://ftp.fau.de/archlinux/iso/2017.09.01/archlinux-2017.09.01-x86_64.iso

# Install
qemu-system-x86_64 -cdrom archlinux-2017.09.01-x86_64.iso -hda arch.cow -boot order=d -m 1024