diff --git a/defaults/main.yml b/defaults/main.yml
index 6d0eb29c..c98680d0 100644
--- a/defaults/main.yml
+++ b/defaults/main.yml
@@ -158,7 +158,7 @@ rabbitmq_pki_certificates:
   - name: "rabbitmq_{{ ansible_facts['hostname'] }}"
     provider: ownca
     cn: "{{ ansible_facts['hostname'] }}"
-    san: "{{ 'DNS:' ~ ansible_facts['hostname'] ~ ',IP:' ~ rabbitmq_node_address }}"
+    san: "{{ 'DNS:' ~ ansible_facts['hostname'] ~ ',IP:' ~ rabbitmq_node_address ~ ',DNS:' ~ ansible_facts['fqdn'] }}"
     signed_by: "{{ rabbitmq_pki_intermediate_cert_name }}"
 
 # RabbitMQ destination files for SSL certificates
@@ -226,6 +226,8 @@ rabbitmq_process_limit: 1048576
 # Limit memory consumption of the erlang VM
 rabbitmq_memory_high_watermark: 0.2
 
+rabbitmq_env_use_longname: false
+
 # Extra arguments passed to Erlang on startup
 # rabbitmq_erlang_extra_args: "+sbwt none +sbwtdcpu none +sbwtdio none +stbt nnts"
 rabbitmq_erlang_extra_args: ""
diff --git a/releasenotes/notes/rabbitmq_longnames_config-d20b703185074acd.yaml b/releasenotes/notes/rabbitmq_longnames_config-d20b703185074acd.yaml
new file mode 100644
index 00000000..5dee6300
--- /dev/null
+++ b/releasenotes/notes/rabbitmq_longnames_config-d20b703185074acd.yaml
@@ -0,0 +1,7 @@
+---
+features:
+  - |
+    Add ability to set the environment variable ``RABBITMQ_USE_LONGNAMES``
+    via the ``rabbitmq-env.conf`` to be able to use the FQDN of a node.
+    By default this will be set to ``false``, the default value also set
+    by RabbitMQ.
diff --git a/templates/rabbitmq-env.j2 b/templates/rabbitmq-env.j2
index 1c53aa14..c6417105 100644
--- a/templates/rabbitmq-env.j2
+++ b/templates/rabbitmq-env.j2
@@ -1,10 +1,12 @@
 # {{ ansible_managed }}
 
 # Set ERLANG VM parameters
-NODENAME=rabbit@{{ ansible_facts['hostname'] }}
+NODENAME=rabbit@{{ ansible_facts['fqdn'] if rabbitmq_env_use_longname else ansible_facts['hostname'] }}
 RABBITMQ_IO_THREAD_POOL_SIZE={{ rabbitmq_async_threads }}
 RABBITMQ_SERVER_ERL_ARGS="+P {{ rabbitmq_process_limit }}"
 
+USE_LONGNAME={{ rabbitmq_env_use_longname | bool | lower }}
+
 {% if rabbitmq_erlang_extra_args %}
 RABBITMQ_SERVER_ADDITIONAL_ERL_ARGS="{{ rabbitmq_erlang_extra_args }}"
 {% endif %}