Initial commit

ansible/roles/dnsmasq/handlers/main.yml

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+---
+- name: restart dnsmasq
+  systemd:
+    name: dnsmasq
+    state: restarted

ansible/roles/dnsmasq/tasks/main.yml

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+---
+- name: Install dnsmasq
+  apt:
+    name: dnsmasq
+    state: present
+
+- name: Create dnsmasq configuration
+  template:
+    src: dnsmasq.conf.j2
+    dest: /etc/dnsmasq.d/{{ gateway_config.lab_name }}.conf
+    mode: '0644'
+  notify: restart dnsmasq
+
+- name: Enable and start dnsmasq
+  systemd:
+    name: dnsmasq
+    enabled: yes
+    state: started

ansible/roles/dnsmasq/templates/dnsmasq.conf.j2

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+# {{ gateway_config.lab_name }} DHCP configuration
+interface=br-{{ gateway_config.lab_name }}
+bind-interfaces
+
+{% if gateway_config.dhcp_role == 'primary' %}
+# Primary DHCP server
+dhcp-range={{ gateway_config.subnet | ipaddr('10') | ipaddr('address') }},{{ gateway_config.subnet | ipaddr('127') | ipaddr('address') }},{{ gateway_config.subnet | ipaddr('netmask') }},12h
+{% elif gateway_config.dhcp_role == 'secondary' %}
+# Secondary DHCP server (split range)
+dhcp-range={{ gateway_config.subnet | ipaddr('128') | ipaddr('address') }},{{ gateway_config.subnet | ipaddr('245') | ipaddr('address') }},{{ gateway_config.subnet | ipaddr('netmask') }},12h
+{% else %}
+# Backup server (only responds if others fail)
+dhcp-range={{ gateway_config.subnet | ipaddr('10') | ipaddr('address') }},{{ gateway_config.subnet | ipaddr('245') | ipaddr('address') }},{{ gateway_config.subnet | ipaddr('netmask') }},12h
+{% endif %}
+
+dhcp-option=option:router,{{ gateway_config.subnet | ipaddr('1') | ipaddr('address') }}
+dhcp-option=option:dns-server,{{ gateway_config.subnet | ipaddr('1') | ipaddr('address') }}
+
+# Local DNS domain
+domain={{ gateway_config.lab_name }}.lab
+local=/{{ gateway_config.lab_name }}.lab/
+
+# Lease file
+dhcp-leasefile=/var/lib/misc/dnsmasq.{{ gateway_config.lab_name }}.leases
+
+# Logging
+log-dhcp
+log-queries