DNS containers to resolve kolla api interface names

Registered by Vladislav Belogrudov on 2016-10-17

Some OpenStack services require knowledge of peers' short host names to operate. E.g. RabbitMQ cluster needs short host names on api interface for all rabbits, Nova needs hostnames to perform live migration of instances and so on. This blueprint suggest adding DNS containers (simple dnsmasq with /etc/hosts generated), adjusting haproxy to balance resolving, adding dns option to container start code.

Note that existing add-on of hostnames via baremetal role is way too intrusive, static and will require service restart if anything changes in the cluster, e.g. new rabbit or new nova compute host. DNS servers will make such cluster modifications super easy.

Blueprint information

Status:
Not started
Approver:
None
Priority:
Undefined
Drafter:
Vladislav Belogrudov
Direction:
Approved
Assignee:
Vladislav Belogrudov
Definition:
Discussion
Series goal:
None
Implementation:
Unknown
Milestone target:
None

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Have set status to discussion as always nice to get input from other members before approving. It sounds like a good addition to Kolla though -pbourke

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