BIND 10 #1986: b10-auth shouldn't try to forward update requests without ddns running

[BIND 10 Development]

#1986: b10-auth shouldn't try to forward update requests without ddns running
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                   Reporter:         |                 Owner:
  jinmei                             |                Status:  new
                       Type:         |             Milestone:  Next-Sprint-
  defect                             |  Proposed
                   Priority:         |            Resolution:
  medium                             |             Sensitive:  0
                  Component:         |           Sub-Project:  DNS
  b10-auth                           |  Estimated Difficulty:  0
                   Keywords:         |           Total Hours:  0
            Defect Severity:  N/A    |
Feature Depending on Ticket:  DDNS   |
        Add Hours to Ticket:  0      |
                  Internal?:  0      |
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Comment (by jinmei):

 Now the details and plans of #1985 are not so clear, we'll need to
 consider this task independently.

 I can think of two options:

 1. easy but ad-hoc: introduce a new config option for b10-auth, say,
    "use-ddns" to manually control that
 2. probably more correct for longer term but will require more work:
    have ddns tell auth (or in general anyone who's interested) when
    it's ready for accepting requests, and extend auth to dynamically
    create the forwarder.  With this approach we could also solve #1985
    by having b10-ddns include the UNIX socket file path in the
    notification.

 We'll first need to decide whether, how, when we solve this, and then
 need to give it a fresh estimation.  I suspect any prior estimations
 on this ticket are now useless.

 As for "when", my revised suggestion is the hardening sprint.

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Ticket URL: <http://bind10.isc.org/ticket/1986#comment:2>
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