BIND 10 #2020: b10-ddns should get a list of secondary zones from zonemgr

[BIND 10 Development]

#2020: b10-ddns should get a list of secondary zones from zonemgr
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                   Reporter:         |                 Owner:  jinmei
  jinmei                             |                Status:  accepted
                       Type:  task   |             Milestone:
                   Priority:         |  Sprint-20120619
  medium                             |            Resolution:
                  Component:  DDNS   |             Sensitive:  0
                   Keywords:         |           Sub-Project:  DNS
            Defect Severity:  N/A    |  Estimated Difficulty:  0
Feature Depending on Ticket:  DDNS   |           Total Hours:  0
        Add Hours to Ticket:  0      |
                  Internal?:  0      |
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Comment (by jinmei):

 trac2020 is ready for review.

 As we discussed on jabber, there's a potential risk that b10-ddns
 fails to get zonemgr's config due to start up timing issues and dies
 (this problem already existed with auth's config, btw).  after
 considering how to deal with it in the scope of this ticket, I decided
 to just log it and let b10-ddns die; the bind10 process will restart
 it and it should be a sufficient workaround in practice (besides, I've
 not actually seen this error mode in my own experiments, as long as
 auth and zonemgr are invoked before ddns).  Due to the explicit log
 message, we (and admins) can at least know what's happening, and if it
 become quite common and restarting is known to be not sufficient, we
 can then consider a nicer solution.

 Other than this, I believe the implementation is pretty
 straightforward.

-- 
Ticket URL: <http://bind10.isc.org/ticket/2020#comment:3>
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