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🗣 Wd提问: dns ansible

🤖 Ai回答:
DNS Management with Ansible

Ansible provides several ways to manage DNS configurations across your infrastructure、Here's a comprehensive guide:

1、Basic DNS Configuration

Using `dnsmasq` (common for small networks)
yaml

name: Configure dnsmasq DNS server
hosts: dns_servers
become: yes

tasks:
name: Install dnsmasq
apt:
name: dnsmasq
state: present

name: Configure dnsmasq
template:
src: dnsmasq.conf.j2
dest: /etc/dnsmasq.conf
owner: root
group: root
mode: '0644'

name: Restart dnsmasq
systemd:
name: dnsmasq
state: restarted
enabled: yes

Using `bind9` (for more complex setups)
yaml

name: Configure BIND9 DNS server
hosts: dns_servers
become: yes

vars:
zones:
name: 65.hk
type: master
file: db.65.hk
ns: ns1.65.hk
mx: mail.65.hk

tasks:
name: Install BIND9
apt:
name: bind9
state: present

name: Create zone files
template:
src: zone.j2
dest: /var/lib/bind/{{ item.file }}
owner: bind
group: bind
mode: '0644'
loop: {{ zones }}

name: Configure named.conf.local
template:
src: named.conf.local.j2
dest: /etc/bind/named.conf.local
owner: root
group: root
mode: '0644'

name: Restart BIND9
systemd:
name: bind9
state: restarted
enabled: yes

2、DNS Record Management

Using `dig` or `nslookup` for verification
yaml

name: Verify DNS records
hosts: all
gather_facts: no

tasks:
name: Check A record for 65.hk
dig:
host: 65.hk
type: A
register: a_record

name: Display A record result
debug:
msg: A record for 65.hk: {{ a_record.stdout }}

Using cloud provider APIs (AWS Route53, Google Cloud DNS, etc.)
yaml

name: Manage DNS records in AWS Route53
hosts: localhost
gather_facts: no

vars:
aws_region: us-east-1
hosted_zone_id: Z1234567890ABCDEF
dns_records:
name: www.65.hk
type: A
value: 192.0.2.1
ttl: 300
name: mail.65.hk
type: MX
value: 10 mail.65.hk
ttl: 300

tasks:
name: Ensure AWS credentials are available
set_fact:
aws_access_key: {{ lookup('env', 'AWS_ACCESS_KEY_ID') }}
aws_secret_key: {{ lookup('env', 'AWS_SECRET_ACCESS_KEY') }}

name: Add/Update DNS records
amazon.aws.route53:
region: {{ aws_region }}
zone_id: {{ hosted_zone_id }}
record: {{ item.name }}
type: {{ item.type }}
ttl: {{ item.ttl }}
value: {{ item.value }}
loop: {{ dns_records }}

3、DNS Client Configuration

Configure resolv.conf on client machines
yaml

name: Configure DNS clients
hosts: dns_clients
become: yes

tasks:
name: Set up resolv.conf
template:
src: resolv.conf.j2
dest: /etc/resolv.conf
owner: root
group: root
mode: '0644'

4、Advanced DNS Management

Using `dnscrypt-proxy` for encrypted DNS
yaml

name: Deploy dnscrypt-proxy
hosts: dns_servers
become: yes

tasks:
name: Install dnscrypt-proxy
apt:
name: dnscrypt-proxy
state: present

name: Configure dnscrypt-proxy
template:
src: dnscrypt-proxy.toml.j2
dest: /etc/dnscrypt-proxy/dnscrypt-proxy.toml
owner: root
group: root
mode: '0644'

name: Enable and start dnscrypt-proxy
systemd:
name: dnscrypt-proxy
state: started
enabled: yes

5、Complete Example Playbook

yaml

name: Comprehensive DNS Management
hosts: all
become: yes
vars:
local_dns_server: 192.168.1.100
dns_zones:
domain: 65.hk
records:
name: @
type: A
value: 192.168.1.10
name: www
type: CNAME
value: @
name: mail
type: A
value: 192.168.1.20

tasks:
name: Update package lists
apt:
update_cache: yes

name: Install required packages
apt:
name:
bind9
bind9utils
dnsutils
state: present

name: Create DNS zone files
template:
src: zone.j2
dest: /var/lib/bind/{{ item.domain }}.zone
owner: bind
group: bind
mode: '0644'
loop: {{ dns_zones }}

name: Update named.conf.local
template:
src: named.conf.local.j2
dest: /etc/bind/named.conf.local
owner: root
group: root
mode: '0644'

name: Reload BIND9 configuration
systemd:
name: bind9
state: reloaded

name: Test DNS configuration
command: named-checkzone {{ item.domain }} /var/lib/bind/{{ item.domain }}.zone
loop: {{ dns_zones }}
ignore_errors: yes

name: Update client resolv.conf
template:
src: resolv.conf.j2
dest: /etc/resolv.conf
owner: root
group: root
mode: '0644'

Best Practices

1、Use templates for DNS configuration files to maintain consistency
2、Test changes before applying them in production
3、Implement version control for your DNS configuration
4、Monitor DNS health regularly
5、Consider using Terraform for cloud-based DNS management alongside Ansible
6、Secure your DNS servers by restricting access and implementing DNSSEC where possible

Would you like me to elaborate on any specific aspect of DNS management with Ansible?

Ai作答

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