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	Andrew
	Mar 28 2016, 1:50 PM

Description

ldap-based public dns:

$ dig @ns0.wikimedia.org labs-ns0.wikimedia.org | grep 208
labs-ns0.wikimedia.org. 3600 IN A 208.80.154.94
whois 'NS labs-ns0.wikimedia.org'|grep 208
IP Address: 208.80.154.94

$ dig @ns0.wikimedia.org labs-ns1.wikimedia.org | grep 208
labs-ns1.wikimedia.org. 3600 IN A 208.80.154.102
$ whois 'NS labs-ns1.wikimedia.org'|grep 208
IP Address: 208.80.154.102

designate-backed private/public dns:

$ dig @ns0.wikimedia.org labs-ns2.wikimedia.org | grep 208
labs-ns2.wikimedia.org. 3600 IN A 208.80.155.117
$ whois 'NS labs-ns2.wikimedia.org'|grep 208
$

dig @ns0.wikimedia.org labs-ns3.wikimedia.org | grep 208
labs-ns3.wikimedia.org. 3600 IN A 208.80.154.12
$ whois 'NS labs-ns3.wikimedia.org'|grep 208
$

labs-ns0/ns1 now contains a soon-to-be-obsolete subset of the data in ns2/ns3. So we should make ns2/ns3 the primary servers and switch off ns0/ns1. Probably this is best accomplished by renaming ns2/ns3 to ns0/ns1 and retiring the ns2/ns3 names.

Details

	Subject	Repo	Branch	Lines +/-
	Stop using old labs-ns0 and labs-ns1, move ns2/ns3 to ns0/ns1	operations/puppet	production	+12 -12

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Related Objects
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Status	Assigned	Task
Resolved	Andrew	T42525 Cant add a security group to an existing instance
Resolved	Andrew	T87279 Make OpenStack Horizon useful for production labs
Resolved	Andrew	T124181 Support instance manipulation, proxies, dns with Horizon
Resolved	• AlexMonk-WMF	T104521 Support reverse dns for public labs IPs
Resolved	Andrew	T124184 Switch to using Horizon/Designate for labs public dns
Resolved	Andrew	T130032 Enforce true multi-tenancy for labs public DNS
Resolved	Andrew	T131052 replace labs-ns0/1 with labs-ns2/3

Event Timeline

Andrew created this task.Mar 28 2016, 1:50 PM

Change 279945 had a related patch set uploaded (by Andrew Bogott):
Stop using old labs-ns0 and labs-ns1, move ns2/ns3 to ns0/ns1

https://gerrit.wikimedia.org/r/279945

gerritbot added a project: Patch-For-Review.Mar 28 2016, 2:14 PM

Steps:

Fix labs-ns2/ns3 to have proper NS and TTL
disable DNS gui in horizon
Change designate settings for ns2 and ns3 to name ns0 and ns1 as nameservers
Internal DNS change: https://gerrit.wikimedia.org/r/#/c/279946/
Update registrar with new ns0/ns1 addresses (until this completes we'll be in an uncomfortable state)
Wait a few days for caches to update
Update puppet to use new names (should be no-op w/respect to IP addresses) https://gerrit.wikimedia.org/r/#/c/279945/
re-enable DNS gui in horizon
Switch off old ns0/ns1 services, remove labs-ns0-former-placeholder and labs-ns1-former-placeholder references

Andrew added a parent task: T124184: Switch to using Horizon/Designate for labs public dns.Mar 28 2016, 7:41 PM

hashar unsubscribed.Mar 29 2016, 9:20 AM

$ dig @ns0.wikimedia.org labs-ns0.wikimedia.org | grep 208
labs-ns0.wikimedia.org. 3600 IN A 208.80.155.117
$ whois 'NS labs-ns0.wikimedia.org'|grep 208
IP Address: 208.80.155.117
$ dig @ns0.wikimedia.org labs-ns1.wikimedia.org | grep 208
labs-ns1.wikimedia.org. 3600 IN A 208.80.154.12
$ whois 'NS labs-ns1.wikimedia.org'|grep 208
IP Address: 208.80.154.12

Looks like everyone agrees.

Change 279945 merged by Andrew Bogott:
Stop using old labs-ns0 and labs-ns1, move ns2/ns3 to ns0/ns1