This commit duplicates the vm_ready? check to the API layer to allow for API to validate that a VM is alive at checkout. Without this change API relies upon the checks in pool_manager validating pools. This change should allow for additional insight into whether a machine is in a ready state and resopnding at checkout time.
This commit adds bundler to dockerfile_local in order to support building vmpooler. Without this change the dockerfile_local build fails reporting bundler is not available.
This commit updates jruby in dockerfiles from 9.1 to 9.2. Without this change the dockerfiles use a version of ruby that is no longer tested with vmpooler.
