[Bug 1066958] Re: DNS config is invalid after a node gets enlisted.

[Diogo Matsubara]

** Tags removed: verification-needed
** Tags added: verification-done

** Description changed:

  After a node gets enlisted, its hostname is set to a generated address
  based on its IP address (e.g. 192-168-10-10).  When the DNS config gets
  written, if the hostname is not changed to a custom value, the CNAME
  record conflicts with a pre-populated A record for that IP:
  
  Content of /etc/bind/maas/zone.master
      IN  NS  master.
  master. IN A 192.168.10.1
  [...]
  192-168-10-10 IN A 192.168.10.10
  [...]
  192-168-10-10 IN CNAME 192-168-10-10
  
  One solution is to change DNSForwardZoneConfig.get_cname_mapping so that
  the records where generated_hostname(ip) == hostname are filtered out.
  
  == TEST CASE ==
  1. Install MAAS and manage DHCP/DNS server.
- 2. Enlist machine 
+ 2. Enlist machine
  3. Make sure DNS config is correct
+ 
+ Tested in the lenovo lab. No CNAME records appear in the zone.master
+ file.

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https://bugs.launchpad.net/bugs/1066958

Title:
  DNS config is invalid after a node gets enlisted.

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