Fedora CoreOS is provisioned via prebuilt disk images, and configured on first-boot via https://github.com/coreos/ignition[Ignition]. Each platform may require specific logic and components, thus dedicated images are provided for each supported environment. Additionally, a unique platform ID is available in the host environment for runtime introspection.
Runtime introspection
Each Fedora CoreOS image boots with a platform-specific identifier, available on the kernel command-line. The name of the parameter is `ignition.platform.id` and the list of supported platform is documented here.
Platform ID can be introspected at runtime, as follows:
CLI example of platform introspection
$ grep -o ignition.platform.id='[[:alnum:]]*' /proc/cmdline
Platform ID is consumed by OS components such as https://github.com/coreos/ignition[Ignition] and https://github.com/coreos/afterburn[Afterburn]. Additionally, it can be used in systemd units via https://www.freedesktop.org/software/systemd/man/systemd.unit.html#ConditionKernelCommandLine=[`ConditionKernelCommandLine=`].
Well-known IDs
Here is a list of all supported platforms and their identifier:
`aliyun`: Aliyun/Alibaba Cloud (cloud platform)
`aws`: Amazon Web Services (cloud platform)
`azure`: Microsoft Azure (cloud platform)
`digitalocean`: DigitalOcean (cloud platform) - only as a https://www.digitalocean.com/docs/images/custom-images/[Custom Image]
`exoscale`: Exoscale (cloud platform)
`gcp`: Google Cloud Platform (cloud platform)
`ibmcloud`: IBM Cloud, VPC Generation 2 (cloud platform)
`metal`: bare metal with BIOS or UEFI boot
`openstack`: OpenStack (cloud platform)