Add bird role

roles/bird/defaults/main.yml

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+---
+bird_ospf_interfaces: {}
+...

roles/bird/handlers/main.yml

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+---
+- name: Reload bird
+  systemd:
+    name: bird.service
+    state: reloaded
+
+- name: Reload bird6
+  systemd:
+    name: bird6.service
+    state: reloaded
+...

roles/bird/tasks/main.yml

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+---
+- name: Install bird
+  apt:
+    name: bird
+
+- name: Configure bird
+  template:
+    src: bird.conf
+    dest: /etc/bird/bird.conf
+    owner: root
+    group: root
+    mode: u=rw,g=,o=
+  notify:
+    - Reload bird
+
+- name: Configure bird6
+  template:
+    src: bird6.conf
+    dest: /etc/bird/bird6.conf
+    owner: root
+    group: root
+    mode: u=rw,g=,o=
+  notify:
+    - Reload bird6
+
+- name: Enable and start bird
+  systemd:
+    name: bird.service
+    enabled: true
+    state: started
+
+- name: Enable and start bird6
+  systemd:
+    name: bird6.service
+    enabled: true
+    state: started
+...

roles/bird/templates/bird.conf

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+{{ ansible_managed | comment }}
+
+log syslog all;
+
+router id {{ bird_router_id }};
+
+protocol kernel {
+	scan time 60;
+	import none;
+	export all;
+	persist;
+}
+
+protocol device {
+	scan time 60;
+}
+
+protocol ospf backbone {
+	import filter {
+{% if bird_ospf_src_v6 is defined %}
+		krt_prefsrc = {{ bird_ospf_src }};
+{% endif %}
+		accept;
+	};
+	export all;
+	area 0 {
+{% for name, iface in bird_ospf_interfaces.items() %}
+		interface "{{ name }}" {
+{% if iface.stub | default(false) %}
+			stub;
+{% elif iface.broadcast | default(false) %}
+			type broadcast;
+{% endif %}
+		};
+{% endfor %}
+	};
+}

roles/bird/templates/bird6.conf

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+{{ ansible_managed | comment }}
+
+log syslog all;
+
+router id {{ bird_router_id }};
+
+protocol kernel {
+	scan time 60;
+	import none;
+	export all;
+	persist;
+}
+
+protocol device {
+	scan time 60;
+}
+
+protocol ospf backbone {
+	import filter {
+{% if bird_ospf_src_v6 is defined %}
+		krt_prefsrc = {{ bird_ospf_src_v6 }};
+{% endif %}
+		accept;
+	};
+	export all;
+	area 0 {
+{% for name, iface in bird_ospf_interfaces.items() %}
+		interface "{{ name }}" {
+{% if iface.stub | default(false) %}
+			stub;
+{% elif iface.broadcast | default(false) %}
+			type broadcast;
+{% endif %}
+		};
+{% endfor %}
+	};
+}