The recent alpha release of Container Linux v1312.0.0 incorrectly generated disk images without embedding a verity checksum. While this version's deployment was halted quickly and replaced with the fixed version v1313.0.0, a few machines have automatically installed v1312.0.0 and may be experiencing boot failures depending on how long ago they were initially provisioned.
If your system is running the Container Linux alpha channel and has not fully booted, please manually restart the system so that it can fall back to the last working version and automatically update to the corrected v1313.0.0. If you have initially provisioned any Container Linux systems using v1312.0.0, please reprovision them with at least v1313.0.0 to ensure that the verity security checks will be enabled properly for future upgrades.
