Maniphest T119660

Set up LVS for labs dns recursors
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Authored By

	Andrew
	Nov 25 2015, 8:50 PM

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• AlexMonk-WMF

Description

Any time I touch the dns-resolver on holmium, a ton of alarms go off about internal DNS resolution on labs hosts. This is true even after I changed resolv.conf to point to labservices1001 as the primary.

That's because labs services (including the proxies) just aren't smart about noticing change sin resolv.conf. The right solution is to use a single IP for resolution, and have lvs point to both holmium/labservices1002 and labservices1001 for redundancy.

Details

	Subject	Repo	Branch	Lines +/-
	Add an lvs service ip (labs-ns.wikimedia.org) for the labs dns recursors	operations/puppet	production	+33 -0
	Allocate LVS service IPs for labs dns recursor	operations/dns	master	+7 -0

Customize query in gerrit

Related Objects

Mentioned In: T307357: Move cloud vps ns-recursor IPs to host/row-independent addressing
T207533: Move labs-recursors in WMCS
Mentioned Here: T133389: Get Cloud VPS auth dns service IPs in floating space

Event Timeline

Andrew created this task.Nov 25 2015, 8:50 PM

Andrew claimed this task.

Andrew raised the priority of this task from to Needs Triage.

Andrew updated the task description. (Show Details)

Andrew added projects: Patch-For-Review, SRE, Cloud-VPS, Cloud-Services.

Andrew added subscribers: gerritbot, StudiesWorld, Aklapper and 3 others.

• chasemp triaged this task as Medium priority.Nov 25 2015, 8:51 PM

• chasemp set Security to None.

Change 284829 had a related patch set uploaded (by Andrew Bogott):
Add an lvs service ip (labs-ns.wikimedia.org) for labs auth dns

https://gerrit.wikimedia.org/r/284829

Change 284824 had a related patch set uploaded (by Andrew Bogott):
Allocate LVS service IPs for labs auth and recursor dns

https://gerrit.wikimedia.org/r/284824

Change 284824 had a related patch set uploaded (by Andrew Bogott):
Allocate LVS service IPs for labs dns recursor

https://gerrit.wikimedia.org/r/284824

Andrew removed a parent task: T106303: rename holmium to labservices1002.May 24 2016, 2:55 PM

• AlexMonk-WMF subscribed.Jul 23 2016, 2:26 PM

See also T133389

Andrew removed Andrew as the assignee of this task.Apr 12 2017, 5:42 PM

faidon mentioned this in T207533: Move labs-recursors in WMCS.Oct 20 2018, 9:56 AM

• GTirloni subscribed.Oct 24 2018, 7:50 PM

• Phabricator_maintenance moved this task from Backlog to Acknowledged on the SRE board.Jan 26 2019, 8:26 PM

• GTirloni unsubscribed.Mar 21 2019, 9:11 PM

• GTirloni edited projects, added cloud-services-team (Kanban); removed Cloud-Services.Mar 24 2019, 10:28 AM

I'm no longer clear that this is a good idea/necessary

Change 284824 abandoned by Andrew Bogott:
Allocate LVS service IPs for labs dns recursor

https://gerrit.wikimedia.org/r/284824

Change 284829 abandoned by Andrew Bogott:
Add an lvs service ip (labs-ns.wikimedia.org) for the labs dns recursors

https://gerrit.wikimedia.org/r/284829

taavi mentioned this in T307357: Move cloud vps ns-recursor IPs to host/row-independent addressing.May 2 2022, 1:54 PM