Booting Flatcar Container Linux from an ISO

    The latest Flatcar Container Linux ISOs can be downloaded from the image storage site:

    The Alpha channel closely tracks master and is released frequently. The newest versions of system libraries and utilities will be available for testing. The current version is Flatcar Container Linux 3874.0.0.

    Download Alpha ISO Browse Storage Site

    All of the files necessary to verify the image can be found on the storage site.

    The Beta channel consists of promoted Alpha releases. The current version is Flatcar Container Linux 3850.1.0.

    Download Beta ISO Browse Storage Site

    All of the files necessary to verify the image can be found on the storage site.

    The Stable channel should be used by production clusters. Versions of Flatcar Container Linux are battle-tested within the Beta and Alpha channels before being promoted. The current version is Flatcar Container Linux 3815.2.0.

    Download Stable ISO Browse Storage Site

    All of the files necessary to verify the image can be found on the storage site.

    Known limitations

    1. UEFI boot is not currently supported. Boot the system in BIOS compatibility mode.
    2. There is no straightforward way to provide an Ignition config .
    3. A minimum of 2 GB of RAM is required to boot Flatcar Container Linux via ISO.

    Install to disk

    The most common use-case for this ISO is to install Flatcar Container Linux to disk. You can find those instructions here .

    No authentication on console

    The ISO is configured to start a shell on the console without prompting for a password. This is convenient for installation and troubleshooting, but use caution.