Tools to create a bootable USB drive with CoreOS which can be used for bare-metal installations. All tasks including cross transpiling the YAML ignition file are performed through the Makefile provided.
Features:
- Enables auto-login for all local terminals
- Sets the hostname to
coreos-usbso that you can be sure you've booted into the right device.
The Makefile requires and makes use of the Container Linux Config Transpiler and coreos-install script. If these are not installed and available in your path, that should be done before using this to create a coreos-usb. Alternatively, you may wish to manually specify the path to ct and coreos-install with the CT and COREOS_INSTALL variables respectively.
To perform an installation, you will need to know which block (USB) device CoreOS should be installed onto, lsblk is typically a good command to determine this. If the device is /dev/sdX, then the following will transpile the ignition.yml into ignition.json and install onto the specified DEVICE:
sudo make DEVICE=/dev/sdX installOnce installed onto the USB device, it should be booted once (on a machine with no other CoreOS installations on any other attached disks) so that the ignition script is run. On this first boot, autologin will not work, and a restart will be required to be dropped straight into a shell. Ctrl+Alt+Del can be used to reboot once the login prompt is shown.
The Makefile provided is fairly simple and performs two tasks: transpiling the YAML configuration and installing onto a specified block device.
Using ignition, the features of the install are configured by the ignition script which runs on the first boot.
In order to enable auto-login, /usr/share/oem/grub.cfg is modified to append the coreos.autologin kernel option is added to the cmdline using the linux_append variable. Due to this being a modification to the grub configuration, this will not take effect until after the first boot.