RealtimePi uses CustomPiOS, and you can use RealtimePi as a base image for CustomPiOS to make your own realtime kernel-based disros.
RealtimePi is 100% free and open source and maintained by Guy Sheffer. If its helping your life, your organisation or makes you happy, please consider making a donation. It means I can code more and worry less about my balance. Any amount counts. Also many thanks to people contributing code.
Where to get it?
Official mirror is here
Nightly builds are available here (currently built on demand)
How to use it?
- Unzip the image and install it to an SD card like any other Raspberry Pi image
- Configure your WiFi by editing
realtimepi-wpa-supplicant.txtat the root of the flashed card when using it like a flash drive
- Boot the Pi from the SD card
- Hostname is
- Raspberrypi, any.
- 2A power supply
- Realtime kernel out of the box for both armv6 and armv7. All Pies that Raspbian supports are supported.
- Tools to configure the network via text files /boot
- Downloaded Raspbian image.
- root privileges for chroot
- sudo (the script itself calls it, running as root without sudo won't work)
Build RealtimePi From within Raspbian / Debian / Ubuntu
RealtimePi can be built from Debian, Ubuntu, Raspbian. Build requires about 3.5 GB of free space available. Note it takes about 6 hours to builds the kernel, and 12 for both kernels! You can build it by issuing the following commands:
sudo apt-get install realpath p7zip-full qemu-user-static git clone https://github.com/guysoft/CustomPiOS.git git clone https://github.com/guysoft/RealtimePi.git cd RealtimePi/src/image wget -c --trust-server-names 'https://downloads.raspberrypi.org/raspbian_lite_latest' cd .. ../../CustomPiOS/src/update-custompios-paths sudo modprobe loop sudo bash -x ./build_dist
Building RealtimePi Variants
RealtimePi supports building variants, which are builds with changes from the main release build. An example and other variants are available in the folder
To build a variant use:
sudo bash -x ./build_dist [Variant]
Building Using Vagrant
There is a vagrant machine configuration to let build RealtimePi in case your build environment behaves differently. Unless you do extra configuration, vagrant must run as root to have nfs folder sync working.
To use it:
sudo apt-get install vagrant nfs-kernel-server sudo vagrant plugin install vagrant-nfs_guest sudo modprobe nfs cd RealtimePi/src/vagrant sudo vagrant up
After provisioning the machine, its also possible to run a nightly build which updates from devel using:
cd RealtimePi/src/vagrant run_vagrant_build.sh
To build a variant on the machine simply run:
cd RealtimePi/src/vagrant run_vagrant_build.sh [Variant]
- If needed, override existing config settings by creating a new file
src/config.local. You can override all settings found in
src/config. If you need to override the path to the Raspbian image to use for building RealtimePi, override the path to be used in
ZIP_IMG. By default, the most recent file matching
src/imagewill be used.
- The final image will be created in
Code contribution would be appreciated!