diff --git a/manifests/log.pp b/manifests/log.pp
index 41291c6..0e1d0b2 100644
--- a/manifests/log.pp
+++ b/manifests/log.pp
@@ -48,6 +48,10 @@
 #   This option is ignored if log_config_append is set.
 #   Defaults to $::os_service_default
 #
+# [*use_json*]
+#   (Optional) Use JSON format for logging (boolean value).
+#   Defaults to $::os_service_default
+#
 # [*use_stderr*]
 #   (Optional) Log output to standard error.
 #   This option is ignored if log_config_append is set.
@@ -115,6 +119,7 @@ define oslo::log(
   $watch_log_file                = $::os_service_default,
   $use_syslog                    = $::os_service_default,
   $use_journal                   = $::os_service_default,
+  $use_json                      = $::os_service_default,
   $syslog_log_facility           = $::os_service_default,
   $use_stderr                    = $::os_service_default,
   $logging_context_format_string = $::os_service_default,
@@ -153,6 +158,7 @@ define oslo::log(
     'DEFAULT/watch_log_file'                => { value => $watch_log_file },
     'DEFAULT/use_syslog'                    => { value => $use_syslog },
     'DEFAULT/use_journal'                   => { value => $use_journal },
+    'DEFAULT/use_json'                      => { value => $use_json },
     'DEFAULT/syslog_log_facility'           => { value => $syslog_log_facility },
     'DEFAULT/use_stderr'                    => { value => $use_stderr },
     'DEFAULT/logging_context_format_string' => { value => $logging_context_format_string },
diff --git a/releasenotes/notes/log-json-70816c646023e567.yaml b/releasenotes/notes/log-json-70816c646023e567.yaml
new file mode 100644
index 0000000..41c0413
--- /dev/null
+++ b/releasenotes/notes/log-json-70816c646023e567.yaml
@@ -0,0 +1,4 @@
+---
+features:
+  - |
+    Expose use_json logging parameter, which enables JSON formatted logging.
diff --git a/spec/defines/oslo_log_spec.rb b/spec/defines/oslo_log_spec.rb
index c0ebb2d..329fa04 100644
--- a/spec/defines/oslo_log_spec.rb
+++ b/spec/defines/oslo_log_spec.rb
@@ -16,6 +16,7 @@ describe 'oslo::log' do
         is_expected.to contain_keystone_config('DEFAULT/watch_log_file').with_value('<SERVICE DEFAULT>')
         is_expected.to contain_keystone_config('DEFAULT/use_syslog').with_value('<SERVICE DEFAULT>')
         is_expected.to contain_keystone_config('DEFAULT/use_journal').with_value('<SERVICE DEFAULT>')
+        is_expected.to contain_keystone_config('DEFAULT/use_json').with_value('<SERVICE DEFAULT>')
         is_expected.to contain_keystone_config('DEFAULT/syslog_log_facility').with_value('<SERVICE DEFAULT>')
         is_expected.to contain_keystone_config('DEFAULT/use_stderr').with_value('<SERVICE DEFAULT>')
         is_expected.to contain_keystone_config('DEFAULT/logging_context_format_string').with_value('<SERVICE DEFAULT>')
@@ -41,6 +42,7 @@ describe 'oslo::log' do
           :watch_log_file                => true,
           :use_syslog                    => true,
           :use_journal                   => true,
+          :use_json                      => true,
           :syslog_log_facility           => 'LOG_USER',
           :use_stderr                    => true,
           :logging_context_format_string =>
@@ -68,6 +70,7 @@ describe 'oslo::log' do
         is_expected.to contain_keystone_config('DEFAULT/watch_log_file').with_value(true)
         is_expected.to contain_keystone_config('DEFAULT/use_syslog').with_value(true)
         is_expected.to contain_keystone_config('DEFAULT/use_journal').with_value(true)
+        is_expected.to contain_keystone_config('DEFAULT/use_json').with_value(true)
         is_expected.to contain_keystone_config('DEFAULT/syslog_log_facility').with_value('LOG_USER')
         is_expected.to contain_keystone_config('DEFAULT/use_stderr').with_value(true)
         is_expected.to contain_keystone_config('DEFAULT/logging_context_format_string').with_value(