1367518 - fix DNS/DHCP for mdc1 ad infrastructure

Status: RESOLVED FIXED

(Infrastructure & Operations :: RelOps: General, task)

Description

[Amy Rich [:arr] [:arich]]

When the ad infrastructure vms were created, DNS/DHCP was configured for ad.db.mdc1.mozilla.com. Because AD is all part of the same AD domain, these actually need to be in the DNS domains ad.mozilla.com/releng.ad.mozilla.com. Since we're using two different DNS/DHCP servers (infoblox for mdc1, inventory for ad.mozilla.com), we're going to need to split A, PTR, CNAME, DHCP, etc records across two different infrastructures.

I think I have a clear idea of how we need to do this for A/PTR and DHCP, but there are other records we will likely need to modify as well. I'll fix up the A/PTR/CNAME stuff between infoblox and inventory and leave the other required DNS records up to Q et.al. to sort out.

Comment 1

[Amy Rich [:arr] [:arich]]

Okay, infoblox isn't as intuitive as I'd hoped.

rtucker, we need to get the following into infoblox somehow,and it's not clear to me how this would work...


kms02.ad.mozilla.com             PTR 10.48.69.100
wsus02.ad.mozilla.com            PTR 10.48.69.101
dc10.releng.ad.mozilla.com       PTR 10.48.69.102
dc12.releng.ad.mozilla.com       PTR 10.48.69.103
mdt02.ad.mozilla.com             PTR 10.48.69.104

Note that we do NOT want A records (the existing A and PTR records for these hosts in ad.db.mdc1.mozilla.com need to be deleted), because those zones are controlled by inventory.

kms02.ad.db.mdc1.mozilla.com     CNAME kms02.ad.mozilla.com
wsus02.ad.db.mdc1.mozilla.com    CNAME wsus02.ad.mozilla.com
dc10.ad.db.mdc1.mozilla.com      CNAME dc10.ad.mozilla.com
dc12.ad.db.mdc1.mozilla.com      CNAME dc12.ad.mozilla.com
mdt02.ad.db.mdc1.mozilla.com     CNAME mdt02.ad.mozilla.com

DHCP:
kms02.ad.mozilla.com             00:50:56:a1:dc:28 10.48.69.100
wsus02.ad.mozilla.com            00:50:56:a1:c9:01 10.48.69.101
dc10.releng.ad.mozilla.com       00:50:56:a1:a9:69 10.48.69.102
dc12.releng.ad.mozilla.com       00:50:56:a1:a3:c6 10.48.69.103
mdt02.ad.mozilla.com             00:50:56:a1:d1:1e 10.48.69.104

Comment 2

[Amy Rich [:arr] [:arich]]

I've added the correct A records to inventory.

Comment 3

[Rob Tucker [:rtucker]]

The following entries for DHCP exist and are correct inside of Infoblox wrt how Infoblox expects things to be:

kms02.ad.db.mdc1.mozilla.com             00:50:56:a1:dc:28 10.48.69.100
wsus02.ad.db.mdc1.mozilla.com            00:50:56:a1:c9:01 10.48.69.101
dc10.releng.ad.db.mdc1.mozilla.com       00:50:56:a1:a9:69 10.48.69.102
dc12.releng.ad.db.mdc1.mozilla.com       00:50:56:a1:a3:c6 10.48.69.103
mdt02.ad.db.mdc1.mozilla.com             00:50:56:a1:d1:1e 10.48.69.104


re: "Note that we do NOT want A records (the existing A and PTR records for these hosts in ad.db.mdc1.mozilla.com need to be deleted), because those zones are controlled by inventory."

DNS/DHCP for mdc1.mozilla.com is and will continue to be managed by Infoblox and not by inventory. This is further reinforced by changes to the spreadsheet for imports to inventory to remove all traces of sreg, as sreg is what handles DNS/DHCP inside of inventory.

ad.mozilla.com is managed by inventory, ad.db.mdc1.mozilla.com is managed by Infoblox.


I'm happy to help setup CNAMES and other records/hosts as necessary.

Comment 4

[Amy Rich [:arr] [:arich]]

As noted above, those are not the correct hostnames. The hostnames for these machines are:

kms02.ad.mozilla.com             00:50:56:a1:dc:28 10.48.69.100
wsus02.ad.mozilla.com            00:50:56:a1:c9:01 10.48.69.101
dc10.releng.ad.mozilla.com       00:50:56:a1:a9:69 10.48.69.102
dc12.releng.ad.mozilla.com       00:50:56:a1:a3:c6 10.48.69.103
mdt02.ad.mozilla.com             00:50:56:a1:d1:1e 10.48.69.104

Their FQDN is not in mdc1 but in ad.mozilla.com (or releng.ad.mozilla.com).

Comment 5

[Rob Tucker [:rtucker]]

I converted the host entries into DHCP fixed address entries.
I manually created reverse PTR records.

example forward/reverse lookups:

host kms02.ad.mozilla.com 10.48.75.120                                                                                                                                                                                                                                              
Using domain server:
Name: 10.48.75.120
Address: 10.48.75.120#53
Aliases:

kms02.ad.mozilla.com has address 10.48.69.100

host 10.48.69.100 10.48.75.120                                                                                                                                                                                                                                                      
Using domain server:
Name: 10.48.75.120
Address: 10.48.75.120#53
Aliases:

100.69.48.10.in-addr.arpa domain name pointer kms02.ad.mozilla.com.


host mdt02.ad.mozilla.com 10.48.75.120                                                                                                                                                                                                                                              
Using domain server:
Name: 10.48.75.120
Address: 10.48.75.120#53
Aliases:

mdt02.ad.mozilla.com has address 10.48.69.104


host 10.48.69.104 10.48.75.120                                                                                                                                                                                                                                                      
Using domain server:
Name: 10.48.75.120
Address: 10.48.75.120#53
Aliases:

104.69.48.10.in-addr.arpa domain name pointer mdt02.ad.mozilla.com.




Is this now Resolved/Fixed ?

Comment 6

[Amy Rich [:arr] [:arich]]

I added the CNAMEs to ad.db.mdc1.mozilla.com so I think we're done.