firecracker-microvm/firecracker v0.24.0

Firecracker v0.24.0

on GitHub

Added

• Added optional resume_vm field to /snapshot/load API call.
• Added support for block rate limiter PATCH.
• Added devtool test -c|--cpuset-cpus flag for cpus confinement when tests
  run.
• Added devtool test -m|--cpuset-mems flag for memory confinement when tests
  run.
• Added the virtio traditional memory ballooning device.
• Added a mechanism to handle vCPU/VMM errors that result in process termination.
• Added incremental guest memory snapshot support.
• Added aarch64 snapshot support.

Changed

• Change the information provided in DescribeInstance command to provide microVM
  state information (Not started/Running/Paused) instead of whether it's started or not.
• Removed the jailer --extra-args parameter. It was a noop, having been
  replaced by the -- separator for extra arguments.
• Changed the output of the --version command line parameter to include a list
  of supported snapshot data format versions for the firecracker binary.
• Increased the maximum number of virtio devices from 11 to 19.
• Added a new check that prevents creating v0.23 snapshots when more than 11
  devices are attached.
• If the stdout buffer is full and non-blocking, the serial writes no longer block.
  Any new bytes will be lost, until the buffer is freed. The device also logs these
  errors and increments the uart.error_count metric for each lost byte.

Fixed

• Fixed inconsistency in YAML file InstanceInfo definition