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Designate CCP plugin documentation

This is Fuel-CCP plugin for OpenStack Designate service.

Original designate service developer docs are placed here.

Overview

Designate provides DNSaaS services for OpenStack. Designate architecture has next components:

designate-api – provides the standard OpenStack style REST API service;
designate-central – is the service that handles RPC requests via the MQ, it coordinates the persistent storage of data and applies business logic to data from the API;
designate-mdns – is the service that sends DNS NOTIFY and answers zone transfer (AXFR) requests;
designate-pool-manager – is a service that handles the states of the DNS servers Designate manages;
designate-zone-manager – is a service that handles all periodic tasks related to the zone shard it is responsible for;
designate-sink – is an optional service which listens for event notifications, such as compute.instance.create.end. Currently supports Nova and Neutron;
designate-agent – pool manager agent backend. This is an optional service. Agent uses an extension of the DNS protocol to send management requests to the remote agent processes, where the requests will be processed.

CCP components have names of components above, designate-sink and designate-agent components are optional.

Configuration

Designate has configurable options for each component, which could be set for specific node with nodes configs section. These options are: workers and threads. They are placed in designate.service.<service name>.<workers or threads> configs path. Also, designate CCP plugin allows to configure defaults of domain purge: interval, batch_size and time threshold.

Installation

Currently designate CCP plugin is not supported by default, so installation has next steps:

Add next item to repositories.repos list of CCP configuration file:

- git_url: https://git.openstack.org/openstack/fuel-ccp-designate
  name: fuel-ccp-designate

Add designate components to roles list. Next components are required:
```
- designate-api
- designate-central
- designate-mdns
- designate-pool-manager
- designate-zone-manager
```
Components designate-sink and designate-agent are optional and could not be deployed.
Fetch, build, deploy components.
Install python-designateclient and also install/update python-openstackclient with pip:
```
pip install --user -U python-designateclient python-openstackclient
```

Dashboard plugin

Designate has horizon dashboard plugin, which allows to create and manage domains and records. It is already available in horizon and is activated when designate is on board. Domain panel is placed in Projects menu.

Unfortunately, domain requires at least one server, created by designate with command designate server-create, so you cannot use only horizon for full dns management.

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