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社区首页 >专栏 >使用OpenStack Designate构建一个云平台流量监控插件【Open Stack】

使用OpenStack Designate构建一个云平台流量监控插件【Open Stack】

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发布2019-11-08 16:16:00
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发布2019-11-08 16:16:00
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文章被收录于专栏:Opensource翻译专栏

了解如何为OpenStack安装和配置一个多租户的DNS-as-a-service (DNSaaS)

该服务包括用于域和记录管理的REST API、用于与Neutron集成的框架和对Bind9的集成支持服务。

你可以考虑以下DNSaaS:

1.用于管理区和记录的规范的REST API

2.自动生成的记录(使用OpenStack集成)

3.支持多个权限域名服务器

4.主持多个项目/组织

本文解释了如何在CentOS或Red Hat Enterprise Linux 7 (RHEL 7)上手动安装和配置最新版本Designate service,但是您可以在其他发行版上进行相同的安装和配置。

在OpenStack上安装Designate

我为bind和designate匹配了一些Ansible role,用于演示我的GitHub存储库中的设置。此设置假定bind服务是OpenStack控制器节点上的外部服务(即使您可以在本地安装bind)。

第一步:在OpenStack控制器上安装Designate 和 Bind:

代码语言:javascript
复制
# yum install openstack-designate-* bind bind-utils -y

第二步:创建Designate数据库和用户:

代码语言:javascript
复制
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:要使Remote Name Daemon Control (RNDC)正常工作,必须将Bind包安装在控制器端。

配置bind(DNS 服务器)

第一步:创建RNDC文件:

代码语言:javascript
复制
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

第二步:在name .conf中添加以下内容:

代码语言:javascript
复制
include "/etc/rndc.key"; controls { inet {{ DNS_SERVER_IP }} allow { localhost;{{ CONTROLLER_SERVER_IP }}; } keys { "designate"; }; };

在Option部分,添加:

代码语言:javascript
复制
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:

代码语言:javascript
复制
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

第三步:将rndc.key和rndc.conf放入OpenStack控制器中:

代码语言:javascript
复制
# scp -r /etc/rndc* {{ CONTROLLER_SERVER_IP }}:/etc/

创建OpenStack Designate服务和端点

输入:

代码语言:javascript
复制
# 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Designate服务

第一步:编辑/etc/designate/designate.conf:

在[service:api]部分,配置auth_strategy:

代码语言:javascript
复制
 [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:

代码语言:javascript
复制
[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,启用worker模型:

代码语言:javascript
复制
enabled = True
 notify = True

在[storage:sqlalchemy]部分,配置数据库访问:

代码语言:javascript
复制
[storage:sqlalchemy]
 connection = mysql+pymysql://designate:rhlab123@{{ CONTROLLER_SERVER_IP }}/designate

填充Designate数据库:

代码语言:javascript
复制
# su -s /bin/sh -c "designate-manage database sync" designate

第二步:创建 Designate的 pools.yaml 文件 (有 target and bind 细节):

编辑/etc/designate/pools.yaml:

代码语言:javascript
复制
- 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库:

代码语言:javascript
复制
su -s /bin/sh -c "designate-manage pool update" designate

第三步:开始Designate central 和 API服务:

代码语言:javascript
复制
systemctl enable --now designate-central designate-api

第四步:验证Designate 服务已开启:

代码语言:javascript
复制
# 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

第一步:为 Designate 服务配置iptables:

代码语言:javascript
复制
# 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

第二步:编辑/etc/neutron/neutron.conf的[default]部分:

代码语言:javascript
复制
external_dns_driver = designate

第三步:将[designate]部分加入/_etc/_neutron/neutron.conf:

代码语言:javascript
复制
[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

第四步:在neutron.conf:里编辑dns_domain:

代码语言:javascript
复制
dns_domain = rhlab.dev.
 
 # systemctl restart neutron-*

第五步:在/etc/neutron/plugins/ml2/ml2_conf.ini模块层2 (ML2)驱动列表中添加dns:

代码语言:javascript
复制
extension_drivers=port_security,qos,dns

第六步:在Designate 中添加区:

代码语言:javascript
复制
# openstack zone create –email=admin@rhlab.dev rhlab.dev.

在rhlab.dev区添加一个新的记录:

代码语言:javascript
复制
# openstack recordset create --record '192.168.1.230' --type A rhlab.dev. Test

Designate现在就安装和配置完成了

本文系外文翻译,前往查看

如有侵权,请联系 cloudcommunity@tencent.com 删除。

本文系外文翻译前往查看

如有侵权,请联系 cloudcommunity@tencent.com 删除。

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