openstack dns_使用OpenStack Designate构建DNS即服务

最新推荐文章于 2025-01-10 11:28:18 发布

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最新推荐文章于 2025-01-10 11:28:18 发布

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原文链接：https://opensource.com/article/19/4/getting-started-openstack-designate

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openstack dns

Designate是一个多租户DNS即服务，包括用于域和记录管理的REST API，用于与Neutron集成的框架以及对Bind9的集成支持。

您可能需要考虑以下DNSaaS：

干净的REST API，用于管理区域和记录
自动生成记录（与OpenStack集成）
支持多个权威名称服务器
主持多个项目/组织

本文介绍了如何在CentOS或Red Hat Enterprise Linux 7（RHEL 7）上手动安装和配置最新版本的Designate服务，但是您可以在其他发行版上使用相同的配置。

在OpenStack上安装Designate

我具有用于绑定和指定的Ansible角色，这些角色演示了GitHub存储库中的设置。

此设置假定绑定服务在OpenStack控制器节点上是外部的（即使您可以在本地安装绑定）。

安装Designate的软件包并绑定（在OpenStack控制器上）：
```
 # yum install openstack-designate-* bind bind-utils -y 
```

创建指定数据库和用户：


     
     
      
      
       
       MariaDB [(none)]> CREATE DATABASE designate CHARACTER SET utf8 COLLATE utf8_general_ci;
       
       

       
       
       

MariaDB [(none)]> GRANT ALL PRIVILEGES ON designate.* TO \
       
       

'designate'@'localhost' IDENTIFIED BY 'rhlab123';
       
       


       
       

MariaDB [(none)]> GRANT ALL PRIVILEGES ON designate.* TO 'designate'@'%' \
       
       

IDENTIFIED BY 'rhlab123';

注意：必须在控制器端安装绑定程序包，远程名称守护程序控制（RNDC）才能正常运行。

配置绑定（DNS服务器）

生成RNDC文件：


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


       
       

cat <<EOF> etcrndc.conf
       
       

include "/etc/rndc.key";
       
       

options {
       
       

   default-key "designate";
       
       

   default-server {{ DNS_SERVER_IP }};
       
       

   default-port 953;
       
       

};
       
       

EOF

将以下内容添加到named.conf中 ：

include "/etc/rndc.key";
controls {
        inet {{ DNS_SERVER_IP }}  allow { localhost;{{ CONTROLLER_SERVER_IP }}; } keys { "designate"; };
  };

在选项部分中，添加：


     
     
      
      
       
       options {
       
       

...
       
       

 allow-new-zones yes;
       
       

 request-ixfr no;
       
       

 listen-on port 53 { any; };
       
       

 recursion no;
       
       

 allow-query { 127.0.0.1; {{ CONTROLLER_SERVER_IP }}; };
       
       

};

添加正确的权限：


     
     
      
      
       
        chown named:named /etc/rndc.key
       
       

 chown named:named /etc/rndc.conf
       
       

 chmod 600 /etc/rndc.key
       
       

 chown -v root:named /etc/named.conf
       
       

 chmod g+w /var/named
       
       


       
       


       
       

# systemctl restart named
       
       

# setsebool named_write_master_zones 1

将rndc.key和rndc.conf推入OpenStack控制器：

 # scp -r /etc/rndc* {{ CONTROLLER_SERVER_IP }}:/etc/

创建OpenStack Designate服务和端点

输入：


   
   
    
    
     
     # openstack user create --domain default --password-prompt designate
     
     

# openstack role add --project services --user designate admin
     
     

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


     
     

# openstack endpoint create --region RegionOne dns public http://{{ CONTROLLER_SERVER_IP }}:9001/
     
     

# openstack endpoint create --region RegionOne dns internal http://{{ CONTROLLER_SERVER_IP }}:9001/  
     
     

# openstack endpoint create --region RegionOne dns admin http://{{ CONTROLLER_SERVER_IP }}:9001/

配置指定服务

编辑/etc/designate/designate.conf ：

在[service：api]部分中，配置auth_strategy ：


       
       
        
        
         
         [service:api]
         
         

listen = 0.0.0.0:9001
         
         

auth_strategy = keystone
         
         

api_base_uri = http://{{ CONTROLLER_SERVER_IP }}:9001/
         
         

enable_api_v2 = True
         
         

enabled_extensions_v2 = quotas, reports

在[keystone_authtoken]部分中，配置以下选项：


       
       
        
        
         
         [keystone_authtoken]
         
         

auth_type = password
         
         

username = designate
         
         

password = rhlab123
         
         

project_name = service
         
         

project_domain_name = Default
         
         

user_domain_name = Default
         
         

www_authenticate_uri = http://{{ CONTROLLER_SERVER_IP }}:5000/
         
         

auth_url = http://{{ CONTROLLER_SERVER_IP }}:5000/

在[service：worker]部分中，启用worker模型：


       
       
        
        
         
         enabled = True
         
         

notify = True

在[storage：sqlalchemy]部分中，配置数据库访问权限：


       
       
        
        
         
         [storage:sqlalchemy]
         
         

connection = mysql+pymysql://designate:rhlab123@{{ CONTROLLER_SERVER_IP }}/designate

填充“指定”数据库：

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

创建Designate的pools.yaml文件（具有目标和绑定详细信息）：

编辑/etc/designate/pools.yaml ：


       
       
        
        
         
         - 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: {{Controller_FQDN}}. # Thisis mDNS
         
         

      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: {{ DNS_SERVER_IP }}
         
         

      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: {{ CONTROLLER_SERVER_IP }}
         
         

          port: 5354
         
         


         
         

      # BIND Configuration options
         
         

      options:
         
         

        host: {{ DNS_SERVER_IP }}
         
         

        port: 53
         
         

        rndc_host: {{ DNS_SERVER_IP }}
         
         

        rndc_port: 953
         
         

        rndc_key_file: /etc/rndc.key
         
         

        rndc_config_file: /etc/rndc.conf

填充Designate的池：

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

开始指定中央和API服务：

 systemctl enable --now designate-central designate-api

验证Designate的服务是否正常运行：


     
     
      
      
       
       # openstack dns service list
       
       


       
       

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

| service_name | status | stats | capabilities |
       
       

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

| central      | UP     | -     | -            |
       
       

| api          | UP     | -     | -            |
       
       

| mdns         | UP     | -     | -            |
       
       

| worker       | UP     | -     | -            |
       
       

| producer     | UP     | -     | -            |
       
       

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

使用外部DNS配置OpenStack Neutron

为指定服务配置iptables：


     
     
      
      
       
       # iptables -I INPUT -p tcp -m multiport --dports 9001 -m comment --comment "designate incoming" -j ACCEPT
       
       

       
       
       

# iptables -I INPUT -p tcp -m multiport --dports 5354 -m comment --comment "Designate mdns incoming" -j ACCEPT
       
       

       
       
       

# iptables -I INPUT -p tcp -m multiport --dports 53 -m comment --comment "bind incoming" -j ACCEPT
       
       

       
       
       

        
       
       

# iptables -I INPUT -p udp -m multiport --dports 53 -m comment --comment "bind/powerdns incoming" -j ACCEPT
       
       

       
       
       

# iptables -I INPUT -p tcp -m multiport --dports 953 -m comment --comment "rndc incoming - bind only" -j ACCEPT
       
       

       
       
       

# service iptables save; service iptables restart
       
       

# setsebool named_write_master_zones 1

编辑/etc/neutron/neutron.conf的[default]部分：
```
 external_dns_driver = designate 
```

在/_etc/_neutron/neutron.conf中添加[指定]部分：


     
     
      
      
       
       [designate]
       
       

url = http://{{ CONTROLLER_SERVER_IP }}:9001/v2  ## This end point of designate
       
       

auth_type = password
       
       

auth_url = http://{{ CONTROLLER_SERVER_IP }}:5000
       
       

username = designate
       
       

password = rhlab123
       
       

project_name = services
       
       

project_domain_name = Default
       
       

user_domain_name = Default
       
       

allow_reverse_dns_lookup = True
       
       

ipv4_ptr_zone_prefix_size = 24
       
       

ipv6_ptr_zone_prefix_size = 116

编辑dns_domain的在neutron.conf：


     
     
      
      
       
       dns_domain = rhlab.dev.
       
       


       
       

# systemctl restart neutron-*

将dns添加到/etc/neutron/plugins/ml2/ml2_conf.ini中的Modular Layer 2（ML2）驱动程序列表中 ：
```
 extension_drivers=port_security,qos,dns 
```

在“指定”中添加区域：

 # openstack zone create –email=admin@rhlab.dev rhlab.dev.

在rhlab.dev区域添加新记录：

 # openstack recordset create --record '192.168.1.230' --type A rhlab.dev. Test

现在应安装并配置“指定”。

翻译自: https://opensource.com/article/19/4/getting-started-openstack-designate

openstack dns