CoreOS Container Linux will end its life cycle on May 26, 2020, and will no longer receive updates. It is strongly recommended that users start migrating workloads to another operating system as soon as possible.
Container Linux is the original CoreOS Linux distribution and was renamed Container Linux in 2016. In early 2018, Red Hat acquired CoreOS and announced the launch of Fedora CoreOS in June of that year, becoming the new upstream release of CoreOS. Fedora CoreOS is a new version of Fedora built specifically to run containerized workloads securely. It is a successor of Fedora Atomic Host and CoreOS Container Linux. Last month, Fedora CoreOS is available to use.
Container Linux has ended its life cycle. Red Hat and CoreOS naturally recommend users to participate in Fedora CoreOS. They have provided migration guides.
Regarding the timeline of the end of the life cycle of Container Linux, the official instructions are as follows:
Effective immediately, the CoreOS Container Linux listing on AWS Marketplace will no longer be available to new subscribers. Note that this does not affect existing subscribers to Container Linux on AWS Marketplace, nor does it affect users launching Container Linux via the AMI IDs listed on the CoreOS download page.
On May 26, the final updates to CoreOS Container Linux will begin rolling out. Any bugs or security vulnerabilities discovered after that date will not be fixed.
On or after September 1, published resources related to CoreOS Container Linux will be deleted or made read-only. OS downloads will be removed, CoreUpdate servers will be shut down, and OS images will be removed from AWS, Azure, and Google Compute Engine. GitHub repositories, including the issue tracker, will become read-only. Documentation will continue to exist for as long as is practical, to aid migration to other operating systems. Existing Container Linux machines will continue running, but will no longer be able to download updates. New CoreOS Container Linux machines will not be launchable in public clouds without prior preparation.