HowTo:
Migrate Samba 4 DNS data from the legacy to the default partition
Please take into account that during the migration DNS is not fully available
Step 1:
Check if you have legacy DNS Zones:
root@ucs:~# univention-s4search -b CN=MicrosoftDNS,CN=System,$(ucr get samba4/ldap/base) --cross-ncs |grep dn: |grep -vi root
dn: DC=_msdcs,DC=multi.ucs,CN=MicrosoftDNS,CN=System,DC=multi,DC=ucs
[...]
→ Migration is necessary
There should NOT be anything below the CN=MicrosoftDNS,CN=System container. You should only get the DN itself:
root@ucs:~# univention-s4search -b CN=MicrosoftDNS,CN=System,$(ucr get samba4/ldap/base) --cross-ncs |grep dn: |grep -vi root
dn: CN=MicrosoftDNS,CN=System,DC=multi,DC=ucs
→ Migration not necessary
Check if the connector uses legacy
ucr get connector/s4/mapping/dns/position
→ legacy → you should consider the migration.
Step 2
On the master (or @school-slave) migrate the existing zone info to the new location with the script migrate_legacy_dns_zones attached to
the Bug 43692 - Migrate Samba 4 DNS data from the legacy to the default partition . It is also essential that the unmodified script is used, please avoid Copy&Paste and rather use wget or similar methods.
Step 3
Now make sure the S4 connector does not sync to legacy branches:
ucr unset connector/s4/mapping/dns/position
systemctl restart univention-s4-connector
Step 4
Make sure you do not find entries in your /var/log/daemon.log regarding duplicate zones like
Mar 12 13:26:20 slave named[18248]: samba_dlz: Ignoring duplicate zone 'multi.ucs' from 'DC=@,DC=multi.ucs,CN=MicrosoftDNS,DC=DomainDnsZones,DC=multi,DC=ucs'
Mar 12 13:26:20 slave named[18248]: samba_dlz: Ignoring dnsZone _msdcs.multi.ucs
If this is so start over with step 2.
Remove the duplicate entry:
ldbdel -H /var/lib/samba/private/sam.ldb DC=_msdcs,DC=multi.ucs,CN=MicrosoftDNS,CN=System,DC=multi,DC=ucs
systemctl restart bind9
Tags:
legacy, dns , CN=MicrosoftDNS,CN=System , connector/s4/mapping/dns/position, migrate_legacy_dns_zones