What’s New
CircleCI is upgrading the kernel version of the operating system used to run customer containers as part of the Docker executor on CircleCI. This change is critical to ensuring the underlying infrastructure that runs your jobs continues to provide reliable and performant execution.
CircleCI will be gradually rolling out this change for all Docker executor customers beginning on December 1, 2021.
This upgrade should be effectively invisible to customers. For more information on this update, refer to the following Discuss post.