Hass.io OS based on buildroot. It's a hypervisor for docker and support many kind of IoT hardware. It is also available as Virtual Appliance. It's optimazed for embedded system and high security. You can update the system simple with OTA updates or offline Updates.

Focus

Linux kernel 4.15
Barebox as bootloader
RAUC for OTA updates
SquashFS LZ4 for filesystem
Docker 17.12.1
ZRAM LZ4 for /tmp, /var, swap

Schemas

Config

Create a USB stick with a partition "hassio-config". This partition can include follow files:

network-*.config

Building

Running sudo ./enter.sh will get you into the build docker container.
make -C /build/buildroot BR2_EXTERNAL=/build/buildroot-external xy_defconfig

From outside the docker container, while it is still running you can use ./getimage.sh to get the output image.

Helpers

make -C /build/buildroot BR2_EXTERNAL=/build/buildroot-external defconfig BR2_DEFCONFIG=/build/buildroot-external/configs/xy_defconfig
make -C /build/buildroot BR2_EXTERNAL=/build/buildroot-external menuconfig
make -C /build/buildroot BR2_EXTERNAL=/build/buildroot-external linux-menuconfig
make -C /build/buildroot BR2_EXTERNAL=/build/buildroot-external barebox-menuconfig
make -C /build/buildroot BR2_EXTERNAL=/build/buildroot-external savedefconfig BR2_DEFCONFIG=/build/buildroot-external/configs/xy_defconfig
make -C /build/buildroot BR2_EXTERNAL=/build/buildroot-external linux-update-defconfig
make -C /build/buildroot BR2_EXTERNAL=/build/buildroot-external barebox-update-defconfig

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