diff --git a/openstack-tf/common_setups/35-prometheus.tf b/openstack-tf/common_setups/35-prometheus.tf
index 8730b5ae..7649fe17 100644
--- a/openstack-tf/common_setups/35-prometheus.tf
+++ b/openstack-tf/common_setups/35-prometheus.tf
@@ -46,6 +46,7 @@ resource "openstack_compute_floatingip_associate_v2" "prometheus_server" {
 
 locals {
   prometheus_recordset_name = "${var.prometheus_server_data.name}.${var.dns_zone.zone_name}"
+  alertmanager_recordset_name = "alertmanager.${var.dns_zone.zone_name}"
 }
 
 resource "openstack_dns_recordset_v2" "prometheus_server_recordset" {
@@ -56,3 +57,12 @@ resource "openstack_dns_recordset_v2" "prometheus_server_recordset" {
   type        = "A"
   records     = [openstack_networking_floatingip_v2.prometheus_server_ip.address]
 }
+
+resource "openstack_dns_recordset_v2" "alertmanager_server_recordset" {
+  zone_id     = var.dns_zone_id
+  name        = local.alertmanager_recordset_name
+  description = "Prometheus alertmanager"
+  ttl         = 8600
+  type        = "CNAME"
+  records     = [local.prometheus_recordset_name]
+}