As of v0.5.0, RancherOS releases include a Raspberry Pi image that can be found on our releases page. The official Raspberry Pi documentation contains instructions on how to install operating system images.

When installing, there is no ability to pass in a cloud-config. You will need to boot up, change the configuration and then reboot to apply those changes.

Currently, only Raspberry Pi 3 is tested and known to work.

Note: It is not necessary to run ros install after installing RancherOS to an SD card.

Using the entire SD Card

RancherOS does not currently expand the root partition to fill the remainder of the SD card automatically. Instead, the following workaround can be used to store Docker containers on a larger partition that fills the remainder.

  1. sudo fdisk /dev/mmcblk0
  2. Create a new partition
  3. Press [Enter] four (4x) times to accept the defaults
  4. Then write the table and exit
  5. sudo reboot to reboot and reload the new partition table
  6. sudo mkdir /mnt/docker to create the directory to be used as the new Docker root
  7. sudo ros config set rancher.docker.extra_args [-g,/mnt/docker] to configure Docker to use the new root
  8. sudo mkfs.ext4 /dev/mmcblk0p3 to format the disk
  9. sudo ros config set mounts "[['/dev/mmcblk0p3','/mnt/docker','ext4','']]" to preserve this mount after reboots
  10. sudo mount /dev/mmcblk0p3 /mnt/docker to mount the Docker root
  11. sudo system-docker restart docker to restart Docker using the new root If this is not a new installation, you’ll have to copy over your existing Docker root (/var/lib/docker) to the new root (/mnt/docker).
  12. sudo cp -R /var/lib/docker/* /mnt/docker to recursively copy all files
  13. sudo system-docker restart docker to restart Docker using the new root

Using Wi-Fi

Available as of v1.5.2

Here are steps about how to enable Wi-Fi on a Raspberry Pi:

modprobe brcmfmac
wpa_passphrase <ssid> <psk> > /etc/wpa_supplicant.conf
wpa_supplicant -iwlan0 -B -c /etc/wpa_supplicant.conf
# wait a few seconds, then
dhcpcd -MA4 wlan0

You can also use cloud-config to enable Wi-Fi:

        wifi_network: network1
        ssid: "Your wifi ssid"
        psk: "Your wifi password"
        scan_ssid: 1

Raspberry Pi will automatically drop Wi-Fi connection after a while, this is due to power management. To fix this problem, you can try this:

iwconfig wlan0 power off