diff --git a/manifests/compute.pp b/manifests/compute.pp
index 560547fc6..4371baf89 100644
--- a/manifests/compute.pp
+++ b/manifests/compute.pp
@@ -249,6 +249,11 @@
 #   loaded at a time.
 #   Defaults to $::os_service_default
 #
+# [*default_ephemeral_format*]
+#   (optional) The default format an ephemeral_volume will be formatted with
+#   on creation.
+#   Defaults to $::os_service_default
+#
 # DEPRECATED PARAMETERS
 #
 # [*neutron_enabled*]
@@ -326,6 +331,7 @@ class nova::compute (
   $running_deleted_instance_poll_interval      = $::os_service_default,
   $running_deleted_instance_timeout            = $::os_service_default,
   $compute_monitors                            = $::os_service_default,
+  $default_ephemeral_format                    = $::os_service_default,
   # DEPRECATED PARAMETERS
   $neutron_enabled                             = undef,
   $install_bridge_utils                        = undef,
@@ -480,6 +486,7 @@ Use the same parameter in nova::api class.')
       value => $running_deleted_instance_poll_interval;
     'DEFAULT/running_deleted_instance_timeout':  value => $running_deleted_instance_timeout;
     'DEFAULT/compute_monitors':                  value => join(any2array($compute_monitors), ',');
+    'DEFAULT/default_ephemeral_format':          value => $default_ephemeral_format;
   }
 
   if ($vnc_enabled) {
diff --git a/releasenotes/notes/add_compute_default_ephemeral_format-c30f5463c1616903.yaml b/releasenotes/notes/add_compute_default_ephemeral_format-c30f5463c1616903.yaml
new file mode 100644
index 000000000..575872f8f
--- /dev/null
+++ b/releasenotes/notes/add_compute_default_ephemeral_format-c30f5463c1616903.yaml
@@ -0,0 +1,5 @@
+---
+features:
+  - |
+    Add the ``default_ephemeral_format`` parameter which specifies default format
+    an ephemeral_volume will be formatted with on creation.
diff --git a/spec/classes/nova_compute_spec.rb b/spec/classes/nova_compute_spec.rb
index 37a0ee0fa..3e73f6190 100644
--- a/spec/classes/nova_compute_spec.rb
+++ b/spec/classes/nova_compute_spec.rb
@@ -68,6 +68,7 @@ describe 'nova::compute' do
       it { is_expected.to contain_nova_config('DEFAULT/running_deleted_instance_poll_interval').with_value('<SERVICE DEFAULT>') }
       it { is_expected.to contain_nova_config('DEFAULT/running_deleted_instance_timeout').with_value('<SERVICE DEFAULT>') }
       it { is_expected.to contain_nova_config('DEFAULT/compute_monitors').with_value('<SERVICE DEFAULT>') }
+      it { is_expected.to contain_nova_config('DEFAULT/default_ephemeral_format').with_value('<SERVICE DEFAULT>') }
 
       it { is_expected.to_not contain_package('bridge-utils').with(
         :ensure => 'present',
@@ -120,6 +121,7 @@ describe 'nova::compute' do
           :running_deleted_instance_poll_interval => '900',
           :running_deleted_instance_timeout   => '200',
           :compute_monitors                   => ['cpu.virt_driver','fake'],
+          :default_ephemeral_format           => 'ext4',
         }
       end
 
@@ -183,6 +185,7 @@ describe 'nova::compute' do
       it { is_expected.to contain_nova_config('DEFAULT/running_deleted_instance_poll_interval').with_value('900') }
       it { is_expected.to contain_nova_config('DEFAULT/running_deleted_instance_timeout').with_value('200') }
       it { is_expected.to contain_nova_config('DEFAULT/compute_monitors').with_value('cpu.virt_driver,fake') }
+      it { is_expected.to contain_nova_config('DEFAULT/default_ephemeral_format').with_value('ext4') }
 
       it 'configures nova config_drive_format to vfat' do
         is_expected.to contain_nova_config('DEFAULT/config_drive_format').with_value('vfat')