[AURORA-43] Rename maintenance commands to have a consistent prefix

• Type: Task
• Status: Resolved
• Priority: Trivial
• Resolution: Fixed
• Fix Version/s: 0.6.0
• Component/s: Reliability, SRE
• Labels: newbie
• Assignee: Maxim Khutornenko
• Reporter: Tobias Weingartner
• Created: 16/Jan/14 21:15
• Updated: 28/Oct/14 22:38
• Resolved: 22/Aug/14 23:49

Description

Let's make the drain/maintenance commands have a common prefix, preferably something short. I propose the following in a man page format:

SYNOPSIS
  host_status [-f filename] cluster [host ...]
  host_deactivate [-f filename] cluster [host ...]
  host_drain [-f filename] cluster [host ...]
  host_activate [-f filename] cluster [host ...]

DESCRIPTION
  host_status
    Print the drain status of each supplied host.

  host_deactivate
    The list of hosts is marked for maintenance, and will be de-prioritized
    from consideration for scheduling.  Note, they are not removed from
    consideration, and may still schedule tasks if resources are very scarce.
    Usually you would mark a larger set of machines for drain, and then do
    them in batches within the larger set, to help drained tasks not land on
    future hosts that will be drained shortly in subsequent batches.

  host_drain
    The list of hosts is drained and marked in a drained state.  This will kill
    off any tasks currently running on these hosts, as well as prevent future
    tasks from scheduling on these hosts while they are drained.

  host_activate
    The list of hosts is marked as not in a drained state anymore.  This will
    allow normal scheduling to resume on the given list of hosts.

OPTIONS
  -f, --file filename
    Provide a filename (you can specify stdin using "-") containing the list of
    hosts to perform the given action on.  No hosts performs nothing.

Issue Links

• relates to: AURORA-501 Improve HostMaintenance API