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学习如何安装和配置 Designate,建个S即这是服务一个 OpenStack 的多租户 DNS 即服务(DNSaaS)。
Designate 是建个S即一个多租户的 DNS 即服务,它包括一个用于域名和记录管理的服务 REST API 和集成了 Neutron 的框架,并支持 Bind9。建个S即
DNSaaS 可以提供:
Designate's architecture
这篇文章解释了如何在 CentOS 和 RHEL 上手动安装和配置 Designate 的当前版本,但是建个S即同样的配置也可以用在其它发行版上。
在我的服务 GitHub 仓库里,我已经放了 Ansible 的建个S即 bind 和 Designate 角色的示范设置。
这个设置假定 bing 服务是服务安装 OpenStack 控制器节点之外(即使你可以在本地安装 bind)。
1、建个S即在 OpenStack 控制节点上安装 Designate 和 bind 软件包:
# yum install openstack-designate-* bind bind-utils -y
2、服务创建 Designate 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:bind 包必须安装在控制节点之外才能使远程名字服务控制(RNDC)功能正常。建个S即
1、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
2、将下列配置添加到 named.conf
:
include "/etc/rndc.key";
controls {
inet { { DNS_SERVER_IP }} allow { localhost;{ { CONTROLLER_SERVER_IP }}; } keys { "designate"; };
};
在 option
节中,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
3、把 rndc.key
和 rndc.conf
推入 OpenStack 控制节点:
# scp -r /etc/rndc* { { CONTROLLER_SERVER_IP }}:/etc/
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/
1、编辑 /etc/designate/designate.conf
:
在 [service:api]
节配置 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]
节配置下列选项:
[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]
节,启用 worker 模型:
enabled = True
notify = True
在 [storage:sqlalchemy]
节,配置数据库访问:
[storage:sqlalchemy]
connection = mysql+pymysql://designate:rhlab123@{ { CONTROLLER_SERVER_IP }}/designate
填充 Designate 数据库:
# su -s /bin/sh -c "designate-manage database sync" designate
2、 创建 Designate 的 pools.yaml
文件(包含 target 和 bind 细节):
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 池:
su -s /bin/sh -c "designate-manage pool update" designate
3、启动 Designate 中心和 API 服务:
systemctl enable --now designate-central designate-api
4、验证 Designate 服务运行:
# openstack dns service list
+--------------+--------+-------+--------------+
| service_name | status | stats | capabilities |
+--------------+--------+-------+--------------+
| central | UP | - | - |
| api | UP | - | - |
| mdns | UP | - | - |
| worker | UP | - | - |
| producer | UP | - | - |
+--------------+--------+-------+--------------+
1、为 Designate 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
2、 编辑 /etc/neutron/neutron.conf
的 [default]
节:
external_dns_driver = designate
3、 在 /etc/neutron/neutron.conf
中添加 [designate]
节:
[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
4、编辑 neutron.conf
的 dns_domain
:
dns_domain = rhlab.dev.
重启:
# systemctl restart neutron-*
5、在 /etc/neutron/plugins/ml2/ml2_conf.ini
中的组成层 2(ML2)中添加 dns
:
extension_drivers=port_security,qos,dns
6、在 Designate 中添加区域:
# openstack zone create –email=admin@rhlab.dev rhlab.dev.
在 rhlab.dev
区域中添加记录:
# openstack recordset create --record '192.168.1.230' --type A rhlab.dev. Test
Designate 现在就安装和配置好了。
责任编辑:庞桂玉 来源: Linux中国 OpenStackDesignate系统运维
(责任编辑:休闲)
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