Create bird role for OSPF.

roles/bird/defaults/main.yml

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+---
+bird_ospf_hello: 2
+bird_ospf_retransmit: 2
+bird_ospf_wait: 10
+bird_ospf_dead: 30
+...

roles/bird/handlers/main.yml

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

roles/bird/tasks/main.yml

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+---
+- name: Install bird
+  apt:
+    name: bird
+    state: latest
+
+- name: Configure bird
+  template:
+    src: bird.conf.j2
+    dest: /etc/bird/bird.conf
+    owner: root
+    group: root
+    mode: u=rw,g=r,o=
+
+- name: Enable and start bird
+  systemd:
+    name: bird.service
+    state: started
+    enabled: true
+...

roles/bird/templates/bird.conf.j2

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+log syslog all;
+
+router id {{ bird_router_id }};
+
+protocol kernel {
+    scan time 15;
+    import none;
+    export filter {
+        krt_prefsrc = {{ bird_router_prefsrc }};
+        accept;
+    };
+};
+
+protocol device {
+    scan time 15;
+};
+
+{% if bird_ospf_ifaces is defined %}
+protocol ospf {
+    import all;
+    export all;
+
+    area 0 {
+
+{% for name, attrs in bird_ospf_ifaces.items() %}
+        interface "{{ name }}" {
+{% if "stub" in attrs %}
+            stub;
+{% else %}
+            hello {{ attrs.hello | default(bird_ospf_hello) }};
+            retransmit {{ attrs.retransmit | default(bird_ospf_retransmit) }};
+            wait {{ attrs.wait | default(bird_ospf_wait) }};
+            dead {{ attrs.dead | default(bird_ospf_dead) }};
+            type {{ attrs.type }};
+            cost {{ attrs.cost }};
+{% endif %}
+        };
+
+{% endfor %}
+
+    }
+};
+{% endif %}