[MESOS-3457] Add flag to disable hostname lookup

• Type: Improvement
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 0.25.0
• Labels: mesosphere
• Target Version/s: 0.25.0
• Sprint: Mesosphere Sprint 19
• Story Points: 3
• Assignee: Marco Massenzio
• Reporter: Cody Maloney
• Shepherd: Benjamin Hindman
• Created: 17/Sep/15 22:35
• Updated: 26/Nov/18 12:22
• Resolved: 26/Nov/18 12:22

Description

In testing / buildinging DCOS we've found that we need to set --hostname explicitly on the masters. For our uses IP and `hostname` must always be the same thing.

More in general, under certain circumstances, dynamic lookup of hostname, while successful, provides undesirable results; we would also like, in those circumstances, be able to just set the hostname to the chosen
IP address (possibly set via the -- ip_discovery_command method).

We suggest adding a --no-hostname-lookup.
Note that we can introduce this flag as --hostname-lookup with a default to 'true' (which is the current semantics) and that way someone can do --no-hostname-lookup or --hostname-lookup=false.