diff --git a/ansible/playbooks/monitoring.yml b/ansible/playbooks/monitoring.yml
index a11084c..64152fd 100644
--- a/ansible/playbooks/monitoring.yml
+++ b/ansible/playbooks/monitoring.yml
@@ -10,6 +10,8 @@
       ansible.builtin.include_vars:
         file: "{{ playbook_dir }}/../group_vars/all/secrets.yaml"
       no_log: true
+  roles:
+    - prometheus
   tasks:
     - name: Deploy Prometheus config
       ansible.builtin.template:
@@ -77,11 +79,6 @@
       notify: Restart grafana
 
   handlers:
-    - name: Restart prometheus
-      ansible.builtin.service:
-        name: prometheus
-        state: restarted
-
     - name: Restart grafana
       ansible.builtin.service:
         name: grafana
diff --git a/ansible/roles/prometheus/defaults/main.yml b/ansible/roles/prometheus/defaults/main.yml
new file mode 100644
index 0000000..16a3b9b
--- /dev/null
+++ b/ansible/roles/prometheus/defaults/main.yml
@@ -0,0 +1,2 @@
+---
+prometheus_retention_time: "1y"
diff --git a/ansible/roles/prometheus/handlers/main.yml b/ansible/roles/prometheus/handlers/main.yml
new file mode 100644
index 0000000..690e0bd
--- /dev/null
+++ b/ansible/roles/prometheus/handlers/main.yml
@@ -0,0 +1,5 @@
+---
+- name: Restart prometheus
+  ansible.builtin.service:
+    name: prometheus
+    state: restarted
diff --git a/ansible/roles/prometheus/tasks/main.yml b/ansible/roles/prometheus/tasks/main.yml
new file mode 100644
index 0000000..5ef728c
--- /dev/null
+++ b/ansible/roles/prometheus/tasks/main.yml
@@ -0,0 +1,7 @@
+---
+- name: Set Prometheus args in rc.conf (FreeBSD)
+  community.general.sysrc:
+    name: prometheus_args
+    value: "--storage.tsdb.retention.time={{ prometheus_retention_time }}"
+  when: ansible_facts["os_family"] == "FreeBSD"
+  notify: Restart prometheus