cloud-init
Command line tool for managing cloud instance initialization.
TLDR
Display the status of the most recent cloud-init run
$ cloud-init status
Wait for cloud-init to finish running and then report status
$ cloud-init status --wait
List available top-level metadata keys to query
$ cloud-init query --list-keys
Query cached instance metadata for data
$ cloud-init query [dot_delimited_variable_path]
Clean logs and artifacts to allow cloud-init to rerun
$ cloud-init clean
