diff --git a/manifests/inspector/authtoken.pp b/manifests/inspector/authtoken.pp
index fc4597f5..034f06a7 100644
--- a/manifests/inspector/authtoken.pp
+++ b/manifests/inspector/authtoken.pp
@@ -237,6 +237,10 @@ class ironic::inspector::authtoken(
 
   include ironic::deps
 
+  if $username == 'ironic' {
+    warning('The default username will be changed to ironic-inspector in a future release')
+  }
+
   keystone::resource::authtoken {
     'ironic_inspector_config':
       *                              => $params;
diff --git a/manifests/inspector/ironic.pp b/manifests/inspector/ironic.pp
index 6c7badfc..54b697ec 100644
--- a/manifests/inspector/ironic.pp
+++ b/manifests/inspector/ironic.pp
@@ -75,6 +75,10 @@ class ironic::inspector::ironic (
   $retry_interval      = $facts['os_service_default'],
 ) {
 
+  if $username == 'ironic' {
+    warning('The default username will be changed to ironic-inspector in a future release')
+  }
+
   if is_service_default($system_scope) {
     $project_name_real = $project_name
     $project_domain_name_real = $project_domain_name
diff --git a/manifests/inspector/service_catalog.pp b/manifests/inspector/service_catalog.pp
index 433ba1fd..2860abed 100644
--- a/manifests/inspector/service_catalog.pp
+++ b/manifests/inspector/service_catalog.pp
@@ -70,6 +70,10 @@ class ironic::inspector::service_catalog (
 
   include ironic::deps
 
+  if $username == 'ironic' {
+    warning('The default username will be changed to ironic-inspector in a future release')
+  }
+
   if is_service_default($system_scope) {
     $project_name_real = $project_name
     $project_domain_name_real = $project_domain_name
diff --git a/manifests/inspector/swift.pp b/manifests/inspector/swift.pp
index 4d4ed839..ef286b42 100644
--- a/manifests/inspector/swift.pp
+++ b/manifests/inspector/swift.pp
@@ -78,6 +78,10 @@ class ironic::inspector::swift (
   $delete_after        = $facts['os_service_default'],
 ) {
 
+  if $username == 'ironic' {
+    warning('The default username will be changed to ironic-inspector in a future release')
+  }
+
   if is_service_default($system_scope) {
     $project_name_real = $project_name
     $project_domain_name_real = $project_domain_name
diff --git a/releasenotes/notes/switch-to-ironic-inspector-user-702ad9a5eb605583.yaml b/releasenotes/notes/switch-to-ironic-inspector-user-702ad9a5eb605583.yaml
new file mode 100644
index 00000000..5e451520
--- /dev/null
+++ b/releasenotes/notes/switch-to-ironic-inspector-user-702ad9a5eb605583.yaml
@@ -0,0 +1,11 @@
+---
+upgrade:
+  - |
+    Default value of the username parameters in the following classes will be
+    changed from ``ironic`` to ``ironic-inspector`` in a future release. Set
+    the username parameters explicitly to keep using the ``ironic`` user.
+
+    - ``ironic::inspector::authtoken``
+    - ``ironic::inspector::ironic``
+    - ``ironic::inspector::service_catalog``
+    - ``ironic::inspector::swift``