diff --git a/manifests/init.pp b/manifests/init.pp
index 9db6f00c..a4d1f757 100644
--- a/manifests/init.pp
+++ b/manifests/init.pp
@@ -207,8 +207,16 @@
 #  [*horizon_ca*]
 #    (required with listen_ssl) CA certificate to use for SSL support.
 #
+#  [*wsgi_processes*]
+#    (optional) Number of Horizon processes to spawn
+#    Defaults to $::os_workers
+#
+#  [*wsgi_threads*]
+#    (optional) Number of thread to run in a Horizon process
+#    Defaults to '1'
+#
 #  [*vhost_extra_params*]
-#    (optionnal) extra parameter to pass to the apache::vhost class
+#    (optional) extra parameter to pass to the apache::vhost class
 #    Defaults to undef
 #
 #  [*file_upload_temp_dir*]
@@ -477,6 +485,8 @@ class horizon(
   $horizon_cert                        = undef,
   $horizon_key                         = undef,
   $horizon_ca                          = undef,
+  $wsgi_processes                      = $::os_workers,
+  $wsgi_threads                        = '1',
   $compress_offline                    = true,
   $hypervisor_options                  = {},
   $cinder_options                      = {},
@@ -647,6 +657,8 @@ class horizon(
       horizon_cert   => $horizon_cert,
       horizon_key    => $horizon_key,
       horizon_ca     => $horizon_ca,
+      wsgi_processes => $wsgi_processes,
+      wsgi_threads   => $wsgi_threads,
       extra_params   => $vhost_extra_params,
       redirect_type  => $redirect_type,
       root_url       => $root_url,
diff --git a/releasenotes/notes/apache-wsgi-custom-init-d1064242a6c0f8e8.yaml b/releasenotes/notes/apache-wsgi-custom-init-d1064242a6c0f8e8.yaml
new file mode 100644
index 00000000..80db3283
--- /dev/null
+++ b/releasenotes/notes/apache-wsgi-custom-init-d1064242a6c0f8e8.yaml
@@ -0,0 +1,5 @@
+---
+features:
+  - |
+    The wsgi_processes and wsgi_threads options that is passed to horizon::wsgi::apache
+    can now be set in ::horizon class.
diff --git a/spec/classes/horizon_init_spec.rb b/spec/classes/horizon_init_spec.rb
index ee3be3be..34b9cfa2 100644
--- a/spec/classes/horizon_init_spec.rb
+++ b/spec/classes/horizon_init_spec.rb
@@ -43,10 +43,12 @@ describe 'horizon' do
 
       it 'configures apache' do
         is_expected.to contain_class('horizon::wsgi::apache').with({
-          :servername    => 'some.host.tld',
-          :listen_ssl    => false,
-          :extra_params  => {},
-          :redirect_type => 'permanent',
+          :servername     => 'some.host.tld',
+          :listen_ssl     => false,
+          :wsgi_processes => facts[:os_workers],
+          :wsgi_threads   => '1',
+          :extra_params   => {},
+          :redirect_type  => 'permanent',
         })
       end
 
@@ -116,6 +118,8 @@ describe 'horizon' do
                                             'supported_provider_types' => ['flat', 'vxlan'], 'supported_vnic_types' => ['*'], 'default_ipv4_subnet_pool_label' => 'None', },
           :instance_options               => {'disable_image' => true, 'disable_instance_snapshot' => true, 'disable_volume' => true, 'disable_volume_snapshot' => true, 'create_volume' => false },
           :file_upload_temp_dir           => '/var/spool/horizon',
+          :wsgi_processes                 => '30',
+          :wsgi_threads                   => '5',
           :secure_cookies                 => true,
           :api_versions                   => {'identity' => 2.0},
           :keystone_multidomain_support   => true,
@@ -276,6 +280,18 @@ describe 'horizon' do
       }
     end
 
+    context 'with custom wsgi options' do
+      before do
+        params.merge!( :wsgi_processes => '30',
+                       :wsgi_threads   => '5' )
+      end
+
+      it { should contain_class('horizon::wsgi::apache').with(
+        :wsgi_processes => '30',
+        :wsgi_threads   => '5',
+      )}
+    end
+
     context 'with vhost_extra_params' do
       before do
         params.merge!({
@@ -692,7 +708,8 @@ describe 'horizon' do
       let (:facts) do
         facts.merge!(OSDefaults.get_facts({
           :fqdn           => 'some.host.tld',
-          :concat_basedir => '/var/lib/puppet/concat'
+          :concat_basedir => '/var/lib/puppet/concat',
+          :os_workers     => '6'
         }))
       end