Firecracker v0.10.0

Added

• Each Firecracker process has an associated microVM Metadata Store (MMDS). Its
  contents can be configured using the /mmds API resource.

Changed

• The boot source is specified only with the kernel_image_path and
  the optional parameter boot_args. All other fields are removed.
• The path_on_host property in the drive specification is now marked as
  mandatory.
• PATCH drive only allows patching/changing the path_on_host property.
• All PUT and PATCH requests return the status code 204.
• CPUID brand string (aka model name) now includes the host CPU frequency.
• API requests which add guest network interfaces have an additional parameter,
  allow_mmds_requests which defaults to false.
• Stopping the guest (e.g. using the reboot command) also terminates the
  Firecracker process. When the Firecracker process ends for any reason,
  (other than kill -9), metrics are flushed at the very end.
• On startup jailer closes all inherited file descriptors based on
  sysconf(_SC_OPEN_MAX) except input, output and error.
• The microVM ID prefixes each Firecracker log line. This ID also appears
  in the process cmdline so it's now possible to ps | grep <ID> for it.