OpenStack Ireland Meetup - Galway Feb 2016

Transcript

1. Designate: An Overview Graham Hayes / Hewlett Packard Enterprise Tim Simmons / Rackspace Eric Larson / Rackspace
2. Graham Hayes, HP Designate PTL @grahamhayes graham.hayes@hpe.com mugsie @ irc.freenode.net Tim Simmons, Rackspace Designate Core @timsimmons_ tim.simmons@rackspace.com timsim @ irc.freenode.net Eric Larson, Rackspace Designate Developer @ionrock eric.larson@rackspace.com elarson @ irc.freenode.net
3. Agenda Overview of Designate Our API and Client Libraries How we work with DNS Servers Designate and Nova/Neutron
4. What is Designate?
5. Designate Services Central DB Pool Manager Mini DNS Customer Facing DNS Servers Backend Nova / Neutron Zone Manager API
6. Why use Designate? • DNS isn’t cool - It’s like plumbing, nobody notices when it works and gets terribly upset when it breaks • DNS is essential to nearly every app running on top of OpenStack, really, it is! • Why give users the power to `nova boot`, only to leave them high and dry filing a IT support ticket for a DNS entry? We can do better!
7. API and Client Libraries
8. Ways to interact with Designate ➔ REST API - Directly ➔ Command Line Client ➔ Python Bindings
9. REST APIs ➔ v1 - Deprecated ➔ v2 - Stable ➔ admin - General tools
14. Command Line Client Designate supports the OpenStack CLI $ pip install python-designateclient $ pip install python-openstackclient $ openstack zone create \ --name example.net. \ --email foo@example.org $ openstack recordset create example.net \ --type A --name www \ --records 10.0.0.1 10.0.0.2
15. Python Bindings from designateclient.v2.client import Client from keystoneclient.session import Session … session = Session(auth=auth) client = Client(session=sess) zones = client.zones.list( criterion={'name': 'example.com.'} )
16. How we work with DNS Servers By Petter Karkea (Own work) [CC BY-SA 4.0 (http://creativecommons.org/licenses/by-sa/4.0)], via Wikimedia Commons
17. There are a lot of ways to run DNS PowerDNS Knot Master-Slave Microsoft DNS Multi-Master BIND9 NSD djbdns Secondary Primary Denominator Akamai DynECT Master-Slave-Cache Multi-Region Infoblox
18. How we work with DNS Servers Flexible Scalable Simple
19. MiniDNS A very minimal DNS server, backed by Designate’ s database Utilizes DNS Protocol (NOTIFY, AXFR) Acts as a ‘Master’* Horizontally scalable Designate in control *Most of the time
20. Pool Manager Backends Updating is easy Creating and Deleting can be odd Allows complete customization of the create/delete process Mechanisms for keeping DNS eventually consistent
21. MiniDNS The Agent Optional Talks with MiniDNS using DNS protocol Write plugins for complete control Get all the Designate goodness, regardless of DNS server Agent NOTIFY/AXFR MiniDNS Managed DNS Servers MiniDNS
22. *Secondary Zones MiniDNS/Designate can act as a slave If you want to manage your own DNS, and let Designate distribute to its managed DNS servers Your DNS Server MiniDNS NOTIFY/AXFR Managed DNS Servers NOTIFY/AXFR
23. Demo
24. Designate, Nova and Neutron By ESO (http://www.eso.org/public/images/eso0644a/) [CC BY 4.0 (http://creativecommons.org/licenses/by/4.0)], via Wikimedia Commons
26. Designate Services Central Sink DB Pool Manager Mini DNS Customer Facing DNS Servers Backend Nova / Neutron Zone Manager API