Building a virtual Raspberry Pi

this is a D R A F T !!!

• instruction shown here still have to be generalized
• also it's grossly incomplete and not well structured yet

#1) get a raspbian image

save it on your host and unpack it

• mkdir ~/rpi
• cd ~/rpi
• wget http://director.downloads.raspberrypi.org/raspbian_lite/images/raspbian_lite-2017-04-10/2017-04-10-raspbian-jessie-lite.zip .
• unzip 2017-04-10-raspbian-jessie-lite.zip

#2) tweak the image file to be working in a virtual environment (qemu/kvm)

• $ sudo mount ~/rpi/2017-03-02-raspbian-jessie-lite.img -o loop,offset=70254592 /mnt
• $ sudo vim ld.so.preload (and comment out the line in there)
• $ cd /
• $ sudo umount /mnt

#3) get a custom kernel for the virtual rpi we will be running

Raspbian kernel for qemu and howto: https://github.com/dhruvvyas90/qemu-rpi-kernel

we will be using the newest one (kernel-qemu-4.4.34-jessie)

wget https://raw.githubusercontent.com/dhruvvyas90/qemu-rpi-kernel/master/kernel-qemu-4.4.34-jessie

#4) run the virtual machine (using the kernel from #3)

• $ qemu-system-arm -kernel /path/to/kernel-qemu-4.4.34-jessie -cpu arm1176 -m 256 -M versatilepb -append "root=/dev/sda2 panic=1 $ rootfstype=ext4 rw" -drive "file=/path/to/rpi/2017-04-10-raspbian-jessie-lite.img,index=0,media=disk,format=raw" -nographic -vnc :0

#5) Access your virtual Raspberry Pi

doubled port forwarding has to be applied

• from another terminal
• $ ssh user@server -L 9999:localhost:9999 (access the host)
• $ ssh coder@10.1.80.203 -L 9999:localhost:5900 (access virtual rpi)