===== systemd-nspawn - Airspy Mini (USB) in container =====

====Prerequisites====
  * Fedora 26 host (Debian in container).
  * Find USB device and alias:<code>
# Bus and device number
lsusb |grep Airspy
Bus 001 Device 002: ID 1d50:60a1 OpenMoko, Inc. Airspy

# Get device alias
file /dev/bus/usb/001/002
/dev/bus/usb/001/002: character special (189/1)

grep 189 /proc/devices
189 usb_device
</code>
  * Create ''plugdev'' group on host, GID must be the same on host and within container (ex. GID 46).
  * Create udev rule on host for USB device:<code>
cat /etc/udev/rules.d/airspy.rules 
ATTR{idVendor}=="1d50", ATTR{idProduct}=="60a1", SYMLINK+="airspy-%k", MODE="660", GROUP="plugdev"
</code>

====Create container====
  * Disable SELinux... yeah I know, but: [[https://bugzilla.redhat.com/show_bug.cgi?id=1416540]]
  * Also systemd-nspawn doesn't integrate well with FirewallD, therefore we use the libvirt bridge, already configured per default.


  * Install debootstrap: <code>sudo dnf install debootstrap</code>
  * Install Debian in container:<code>sudo debootstrap --arch=amd64 stable /var/lib/machines/debian</code>
  * Create user, set root password and install dbus:<code>
sudo systemd-nspawn -D /var/lib/machines/debian
 user=airspyuser
 useradd -d /home/$user -m -s /bin/bash $user
 passwd $user
 passwd root

 apt install dbus

 exit # or ctr-]]]</code>
  * Enable systemd machines service:<code>sudo systemctl enable machines.target</code>
  * Edit service:<code>sudo systemctl edit systemd-nspawn@debian.service
ExecStart=
ExecStart=/usr/bin/systemd-nspawn --quiet --keep-unit --boot --link-journal=try-guest --bind=/dev/bus --network-veth --network-bridge=virbr0 -U --settings=override --private-users=0 --private-users-chown --machine=%i

DeviceAllow=char-usb_device rwm</code>
  * Start container:<code>sudo systemctl start systemd-nspawn@debian.service</code>
  * Log in as root:<code>sudo machinectl login debian</code>

====Configure Debian====
  * Configure networking:<code>
cat << EOF > /etc/network/interfaces.d/host0
auto host0
allow-hotplug host0
iface host0 inet dhcp
EOF

echo "debian" /etc/hostname

ifup host0
</code>
  * Install Airspy library and tools:<code>
su -
user=<username>
apt install usbutils git cmake libusb-1.0 libusb-dev g++ pkg-config sudo man less
usermod -a -G plugdev,dialout,sudo $user
exit

# Log in as user
git clone https://github.com/airspy/airspyone_host.git
cd airspyone_host/

mkdir build
cd build
cmake ../ -DINSTALL_UDEV_RULES=ON
make
sudo make install
sudo ldconfig


$ /usr/local/bin/airspy_info
airspy_lib_version: 1.0.9

Found AirSpy board 1
Board ID Number: 0 (AIRSPY)
Firmware Version: AirSpy MINI v1.0.0-rc9-0-ga56adfd 2016-06-12
Part ID Number: 0x6906002B 0x00000030
Serial Number: 0x04A464C83729260B
Supported sample rates:
	6.000000 MSPS
	3.000000 MSPS
Close board 1
</code>

{{tag>[hardware airspy nspawn linux]}}