前言

Designate 是一个开源 DNS 即服务实施，是用于运行云的 OpenStack 服务生态系统的一部分。

Designate 是 OpenStack 的多租户 DNSaaS 服务。它提供了一个带有集成 Keystone 身份验证的 REST API。它可以配置为根据 Nova 和 Neutron 操作自动生成记录。Designate 支持多种 DNS 服务器，包括 Bind9 和 PowerDNS 4。

架构

Designate 由几个不同的服务组成：API、Producer、Central、Worker 和 Mini DNS。它使用 oslo.db 兼容的数据库来存储状态和数据，并使用 oslo.messaging 兼容的消息队列来促进服务之间的通信。所有指定服务的多个副本可以串联运行以促进高可用性部署，API 进程通常位于负载均衡器之后。

前提准备

获取admin凭据以管理员权限访问

source admin-openrc

#创建designate用户

openstack user create --domain demo  --password 000000 designate

#将admin角色添加到designate用户

openstack role add --project service --user designate admin

 #创建指定服务实体

openstack service create --name designate --description "DNS" dns

创建 DNS 服务 API 端点

openstack endpoint create --region RegionOne dns public http://controller:9001/

openstack endpoint create --region RegionOne dns internal http://controller:9001/

openstack endpoint create --region RegionOne dns admin http://controller:9001/

安装和配置组件

安装软件包

# yum install openstack-designate\*

创建用户designate可访问designate 的数据库

CREATE DATABASE designate CHARACTER SET utf8 COLLATE utf8_general_ci;

GRANT ALL PRIVILEGES ON designate.* TO 'designate'@'localhost' IDENTIFIED BY '000000';

GRANT ALL PRIVILEGES ON designate.* TO 'designate'@'%' IDENTIFIED BY '000000';

安装 BIND 包

yum install bind bind-utils

创建一个 RNDC 密钥

rndc-confgen -a -k designate -c /etc/designate/rndc.key -r /dev/urandom

在文件/etc/named.conf中添加以下选项

vim /etc/named.conf

...

include "/etc/designate/rndc.key";

options {

    ...

    allow-new-zones yes;

    request-ixfr no;

    listen-on port 53 { 127.0.0.1; };

    recursion no;

    allow-query { 127.0.0.1; };

};

controls {

  inet 127.0.0.1 port 953

    allow { 127.0.0.1; } keys { "designate"; };

};

启动 DNS 服务

systemctl enable named

systemctl start named

编辑/etc/designate/designate.conf文件

[service:api]

listen = 0.0.0.0:9001

auth_strategy = keystone

enable_api_v2 = True

enable_api_admin = True

enable_host_header = True

enabled_extensions_admin = quotas, reports

[keystone_authtoken]

auth_type = password

username = designate

password = 000000

project_name = service

project_domain_name = demo

user_domain_name = demo

www_authenticate_uri = http://controller:5000/

auth_url = http://controller:5000/

memcached_servers = controller:11211

[DEFAULT]

# ...

transport_url = rabbit://openstack:000000@controller:5672/

[storage:sqlalchemy]

connection = mysql+pymysql://designate:000000@controller/designate

填充指定数据库

su -s /bin/sh -c "designate-manage database sync" designate

启动指定的中心和 API 服务

systemctl start designate-central designate-api

systemctl enable designate-central designate-api

在其中创建一个 pools.yaml 文件，/etc/designate/pools.yaml其中包含以下内容

- name: default

  # The name is immutable. There will be no option to change the name after

  # creation and the only way will to change it will be to delete it

  # (and all zones associated with it) and recreate it.

  description: Default Pool

  attributes: {}

  # List out the NS records for zones hosted within this pool

  # This should be a record that is created outside of designate, that

  # points to the public IP of the controller node.

  ns_records:

    - hostname: ns1-1.example.org.

      priority: 1

  # List out the nameservers for this pool. These are the actual BIND servers.

  # We use these to verify changes have propagated to all nameservers.

  nameservers:

    - host: 127.0.0.1

      port: 53

  # List out the targets for this pool. For BIND there will be one

  # entry for each BIND server, as we have to run rndc command on each server

  targets:

    - type: bind9

      description: BIND9 Server 1

      # List out the designate-mdns servers from which BIND servers should

      # request zone transfers (AXFRs) from.

      # This should be the IP of the controller node.

      # If you have multiple controllers you can add multiple masters

      # by running designate-mdns on them, and adding them here.

      masters:

        - host: 127.0.0.1

          port: 5354

      # BIND Configuration options

      options:

        host: 127.0.0.1

        port: 53

        rndc_host: 127.0.0.1

        rndc_port: 953

        rndc_key_file: /etc/designate/rndc.key

更新池：

# su -s /bin/sh -c "designate-manage pool update" designate

启动指定和 mDNS 服务

systemctl start designate-worker designate-producer designate-mdns

systemctl enable designate-worker designate-producer designate-mdns

验证操作

列出服务组件以验证每个进程的成功启动和注册：

$ . admin-openrc

$ ps -aux | grep designate

../usr/bin/python /usr/bin/designate-mdns --config-file /etc/designate/designate.conf

../usr/bin/python /usr/bin/designate-central --config-file /etc/designate/designate.conf

../usr/bin/python /usr/bin/designate-agent --config-file /etc/designate/designate.conf

../usr/bin/python /usr/bin/designate-api --config-file /etc/designate/designate.conf

../usr/bin/python /usr/bin/designate-worker --config-file /etc/designate/designate.conf

../usr/bin/python /usr/bin/designate-producer --config-file /etc/designate/designate.conf

$ openstack dns service list

+--------------------------------------+--------------------------+--------------+--------+-------+--------------+

| id                                   | hostname                 | service_name | status | stats | capabilities |

+--------------------------------------+--------------------------+--------------+--------+-------+--------------+

| 918a8f6e-9e7e-453e-8583-cbefa7ae7f8f | vagrant-ubuntu-trusty-64 | central      | UP     | -     | -            |

| 982f78d5-525a-4c36-af26-a09aa39de5d7 | vagrant-ubuntu-trusty-64 | api          | UP     | -     | -            |

| eda2dc16-ad27-4ee1-b091-bb75b6ceaffe | vagrant-ubuntu-trusty-64 | mdns         | UP     | -     | -            |

| 00c5c372-e630-49b1-a6b6-17e3fa4544ea | vagrant-ubuntu-trusty-64 | worker       | UP     | -     | -            |

| 8cdaf2e9-accd-4665-8e9e-be26f1ccfe4a | vagrant-ubuntu-trusty-64 | producer     | UP     | -     | -            |

+--------------------------------------+--------------------------+--------------+--------+-------+--------------+

巴特西

openstack之Designate组件，入门级安装（快速）

前言

架构

前提准备

创建 DNS 服务 API 端点

安装和配置组件

验证操作

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