diff --git a/ansible.cfg b/ansible.cfg
index c3c1f59..e08f79c 100644
--- a/ansible.cfg
+++ b/ansible.cfg
@@ -4,4 +4,8 @@
 [defaults]
 collections_path = ansible_collections/
 
-inventory = inventories
\ No newline at end of file
+inventory = inventories
+
+# For development only
+# host_key_checking = False
+
diff --git a/inventories/fake/hosts.yml b/inventories/fake/hosts.yml
new file mode 100644
index 0000000..8fddb28
--- /dev/null
+++ b/inventories/fake/hosts.yml
@@ -0,0 +1,22 @@
+env_fake:
+  vars:
+    ansible_host: localhost
+    ansible_connection: local
+
+  hosts:
+    local:
+
+  children:
+    web:
+        hosts:
+            fake-client1-web1:
+                #ansible_port: 2222
+            fake-client1-web2:
+        vars:
+            ansible_user: root
+    db:
+        hosts:
+            fake-client1-db:
+        #vars:
+        #    ansible_become: true
+        #    ansible_become_pass: password
diff --git a/inventories/lab/hosts.yml b/inventories/lab/hosts.yml
index 9ceae84..f6ad9f4 100644
--- a/inventories/lab/hosts.yml
+++ b/inventories/lab/hosts.yml
@@ -1,22 +1,20 @@
-lab:
-  vars:
-    ansible_host: localhost
-    ansible_connection: local
-
+---
+env_lab:
   hosts:
-    local:
-
+    rocky-1:
+      ansible_host: 192.168.122.129
+    rocky-2:
+      ansible_host: 192.168.122.19
+  vars:
+    ansible_user: cloud-user
+all:
   children:
     web:
-        hosts:
-            client1-web1:
-                #ansible_port: 2222
-            client1-web2:
-        vars:
-            ansible_user: root
+      hosts:
+        rocky-1:
     db:
-        hosts:
-            client1-db:
-        #vars:
-        #    ansible_become: true
-        #    ansible_become_pass: password
+      hosts:
+        rocky-2:
+  vars:
+    environment_name: lab
+
diff --git a/playbooks/hello.yml b/playbooks/hello.yml
index 2de859a..9b44099 100644
--- a/playbooks/hello.yml
+++ b/playbooks/hello.yml
@@ -10,7 +10,7 @@
         msg: Hello, world!
 
 - name: Hello World 
-  hosts: client1-web1
+  hosts: web
   gather_facts: no
 
   tasks:
@@ -19,7 +19,7 @@
         name: activia.infra_common.configure_web
 
 - name: Hello World 
-  hosts: client1-db
+  hosts: db
   gather_facts: no
 
   tasks:
@@ -35,4 +35,4 @@
 
 
 
-    
\ No newline at end of file
+