diff --git a/01-sample-instance/00-params.tf b/01-sample-instance/00-params.tf
index e00d5a7..40ee306 100644
--- a/01-sample-instance/00-params.tf
+++ b/01-sample-instance/00-params.tf
@@ -1,14 +1,8 @@
-# Configure credential OpenStack Provider
-provider "openstack" {
-  user_name   = "my-litle-user"
-  tenant_name = "my-little-tenant"
-  password    = "secret"
-  auth_url    = "http://your-cloud-prodivder.com"
-}
+# Params file for variables
 
 #### GLANCE
 variable "image" {
-  default = "centos-7"
+  default = "Centos 7"
 }
 
 #### NEUTRON
@@ -32,8 +26,7 @@ variable "flavor_http" {
 
 variable "network_http" {
   default = {
-    network_name = "network-http"
-    subnet_name  = "subnet-http"
-    cidr         = "192.168.1.0/24"
+    subnet_name = "subnet-http"
+    cidr        = "192.168.1.0/24"
   }
 }
diff --git a/01-sample-instance/020-network.tf b/01-sample-instance/020-network.tf
index 90a8690..5aeab98 100644
--- a/01-sample-instance/020-network.tf
+++ b/01-sample-instance/020-network.tf
@@ -1,26 +1,28 @@
 #### NETWORK CONFIGURATION ####
 
 # Router creation
-resource "openstack_networking_router_v2" "router_http" {
-  name                = "router-http"
+resource "openstack_networking_router_v2" "generic" {
+  name                = "router-generic"
   external_network_id = "${var.external_gateway}"
 }
 
 # Network creation
-resource "openstack_networking_network_v2" "network_http" {
-  name                = "${var.network_http["network_name"]}"
+resource "openstack_networking_network_v2" "generic" {
+  name                = "network-generic"
 }
 
-# Network configuration
-resource "openstack_networking_subnet_v2" "subnet_http" {
+#### HTTP SUBNET ####
+
+# Subnet http configuration
+resource "openstack_networking_subnet_v2" "http" {
   name                = "${var.network_http["subnet_name"]}"
-  network_id          = "${openstack_networking_network_v2.network_http.id}"
+  network_id          = "${openstack_networking_network_v2.generic.id}"
   cidr                = "${var.network_http["cidr"]}"
   dns_nameservers     = "${var.dns_ip}"
 }
 
 # Router interface configuration
-resource "openstack_networking_router_interface_v2" "router_interface_http" {
-  router_id           = "${openstack_networking_router_v2.router_http.id}"
-  subnet_id           = "${openstack_networking_subnet_v2.subnet_http.id}"
+resource "openstack_networking_router_interface_v2" "http" {
+  router_id           = "${openstack_networking_router_v2.generic.id}"
+  subnet_id           = "${openstack_networking_subnet_v2.http.id}"
 }
diff --git a/01-sample-instance/030-security_group.tf b/01-sample-instance/030-security_group.tf
index ddf75d0..c106dc9 100644
--- a/01-sample-instance/030-security_group.tf
+++ b/01-sample-instance/030-security_group.tf
@@ -1,5 +1,5 @@
 # Acces group, open input port 80 and ssh port
-resource "openstack_compute_secgroup_v2" "security_group_http" {
+resource "openstack_compute_secgroup_v2" "http" {
   name          = "http"
   description   = "Open input http port"
   rule {
@@ -10,7 +10,7 @@ resource "openstack_compute_secgroup_v2" "security_group_http" {
   }
 }
 
-resource "openstack_compute_secgroup_v2" "security_group_ssh" {
+resource "openstack_compute_secgroup_v2" "ssh" {
   name          = "ssh"
   description   = "Open input ssh port"
   rule {
diff --git a/01-sample-instance/060-instance_http.tf b/01-sample-instance/060-instance_http.tf
index c8a18fa..13a5ef3 100644
--- a/01-sample-instance/060-instance_http.tf
+++ b/01-sample-instance/060-instance_http.tf
@@ -2,36 +2,36 @@
 #
 # Create instance
 #
-resource "openstack_compute_instance_v2" "instance_http" {
-  name               = "front01"
+resource "openstack_compute_instance_v2" "http" {
+  name               = "http"
   image_name         = "${var.image}"
   flavor_name        = "${var.flavor_http}"
   key_pair           = "${openstack_compute_keypair_v2.user_key.name}"
   user_data          = "${file("scripts/first-boot.sh")}"
   network {
-    port             = "${openstack_networking_port_v2.port_instance_http.id}"
+    port             = "${openstack_networking_port_v2.http.id}"
   }
 }
 
 # Create network port
-resource "openstack_networking_port_v2" "port_instance_http" {
+resource "openstack_networking_port_v2" "http" {
   name               = "port-instance-http"
-  network_id         = "${openstack_networking_network_v2.network_http.id}"
+  network_id         = "${openstack_networking_network_v2.generic.id}"
   admin_state_up     = true
-  security_group_ids = ["${openstack_compute_secgroup_v2.security_group_ssh.id}",
-                        "${openstack_compute_secgroup_v2.security_group_http.id}"]
+  security_group_ids = ["${openstack_compute_secgroup_v2.ssh.id}",
+                        "${openstack_compute_secgroup_v2.http.id}"]
   fixed_ip           = {
-    subnet_id        = "${openstack_networking_subnet_v2.subnet_http.id}"
+    subnet_id        = "${openstack_networking_subnet_v2.http.id}"
   }
 }
 
 # Create floating ip
-resource "openstack_networking_floatingip_v2" "floating_http" {
+resource "openstack_networking_floatingip_v2" "http" {
   pool               = "${var.external_network}"
 }
 
 # Attach floating ip to instance
-resource "openstack_compute_floatingip_associate_v2" "floating_http" {
-  floating_ip        = "${openstack_networking_floatingip_v2.floating_http.address}"
-  instance_id        = "${openstack_compute_instance_v2.instance_http.id}"
+resource "openstack_compute_floatingip_associate_v2" "http" {
+  floating_ip        = "${openstack_networking_floatingip_v2.http.address}"
+  instance_id        = "${openstack_compute_instance_v2.http.id}"
 }
diff --git a/01-sample-instance/README.md b/01-sample-instance/README.md
index 3219ab8..971c301 100644
--- a/01-sample-instance/README.md
+++ b/01-sample-instance/README.md
@@ -1,5 +1,6 @@
-# Utilisation
+# How to
 
+![infra sample-server](../img/01-sample-instance.png "infra sample-server")
 
 ### Create stack
 
@@ -8,9 +9,9 @@ terraform apply
 ```
 
 This script will create:
-  - 1 router
-  - 1 network
-  - 2 instances
+-   1 router
+-   1 network
+-   1 instance
 
 ### delete stack
 
diff --git a/01-sample-instance/provider.tf b/01-sample-instance/provider.tf
new file mode 100644
index 0000000..380f8c6
--- /dev/null
+++ b/01-sample-instance/provider.tf
@@ -0,0 +1,7 @@
+# Configure credential OpenStack Provider
+provider "openstack" {
+  user_name   = "my-litle-user"
+  tenant_name = "my-little-tenant"
+  password    = "secret"
+  auth_url    = "http://your-cloud-prodivder.com"
+}
diff --git a/02-server-with-volume/00-params.tf b/02-instance-with-volume/00-params.tf
similarity index 51%
rename from 02-server-with-volume/00-params.tf
rename to 02-instance-with-volume/00-params.tf
index 98488d6..5efd9dc 100644
--- a/02-server-with-volume/00-params.tf
+++ b/02-instance-with-volume/00-params.tf
@@ -1,14 +1,8 @@
-# Configure credential OpenStack Provider
-provider "openstack" {
-  user_name   = "my-litle-user"
-  tenant_name = "my-little-tenant"
-  password    = "secret"
-  auth_url    = "http://your-cloud-prodivder.com"
-}
+# Params file for variables
 
 #### GLANCE
 variable "image" {
-  default = "centos-7"
+  default = "Centos 7"
 }
 
 #### NEUTRON
@@ -32,15 +26,13 @@ variable "flavor_http" {
 
 variable "network_http" {
   default = {
-    network_name = "network-http"
-    subnet_name  = "subnet-http"
-    cidr         = "192.168.1.0/24"
+    subnet_name = "subnet-http"
+    cidr        = "192.168.1.0/24"
   }
 }
-
-#### ATTACHED VOLUME PARAMS
+#### MAIN DISK SIZE FOR HTTP
 variable "volume_http" {
-  default = 50
+  default = 10
 }
 
 #### VM DB parameters ####
@@ -48,15 +40,7 @@ variable "flavor_db" {
   default = "t2.medium"
 }
 
-variable "network_db" {
-  default = {
-    network_name = "network-db"
-    subnet_name  = "subnet-db"
-    cidr         = "192.168.2.0/24"
-  }
-}
-
-#### MAIN DISK SIZE FOR DB
+#### ATTACHED VOLUME PARAMS
 variable "volume_db" {
-  default = 40
+  default = 15
 }
diff --git a/02-server-with-volume/010-ssh-key.tf b/02-instance-with-volume/010-ssh-key.tf
similarity index 100%
rename from 02-server-with-volume/010-ssh-key.tf
rename to 02-instance-with-volume/010-ssh-key.tf
diff --git a/02-instance-with-volume/020-network.tf b/02-instance-with-volume/020-network.tf
new file mode 100644
index 0000000..79d1102
--- /dev/null
+++ b/02-instance-with-volume/020-network.tf
@@ -0,0 +1,28 @@
+#### NETWORK CONFIGURATION ####
+
+# Router creation
+resource "openstack_networking_router_v2" "generic" {
+  name                = "router"
+  external_network_id = "${var.external_gateway}"
+}
+
+# Network creation
+resource "openstack_networking_network_v2" "generic" {
+  name                = "network-generic"
+}
+
+#### HTTP SUBNET ####
+
+# Subnet http configuration
+resource "openstack_networking_subnet_v2" "http" {
+  name                = "${var.network_http["subnet_name"]}"
+  network_id          = "${openstack_networking_network_v2.generic.id}"
+  cidr                = "${var.network_http["cidr"]}"
+  dns_nameservers     = "${var.dns_ip}"
+}
+
+# Router interface configuration
+resource "openstack_networking_router_interface_v2" "http" {
+  router_id           = "${openstack_networking_router_v2.generic.id}"
+  subnet_id           = "${openstack_networking_subnet_v2.http.id}"
+}
diff --git a/02-server-with-volume/030-security_group.tf b/02-instance-with-volume/030-security_group.tf
similarity index 76%
rename from 02-server-with-volume/030-security_group.tf
rename to 02-instance-with-volume/030-security_group.tf
index e85706e..30700b1 100644
--- a/02-server-with-volume/030-security_group.tf
+++ b/02-instance-with-volume/030-security_group.tf
@@ -1,5 +1,5 @@
 # Acces group, open input port 80 and ssh port
-resource "openstack_compute_secgroup_v2" "security_group_http" {
+resource "openstack_compute_secgroup_v2" "http" {
   name          = "http"
   description   = "Open input http port"
   rule {
@@ -11,7 +11,7 @@ resource "openstack_compute_secgroup_v2" "security_group_http" {
 }
 
 # Open mariadb port
-resource "openstack_compute_secgroup_v2" "security_group_db" {
+resource "openstack_compute_secgroup_v2" "db" {
   name          = "db"
   description   = "Open input db port"
   rule {
@@ -23,7 +23,7 @@ resource "openstack_compute_secgroup_v2" "security_group_db" {
 }
 
 # Open Apache2 port
-resource "openstack_compute_secgroup_v2" "security_group_ssh" {
+resource "openstack_compute_secgroup_v2" "ssh" {
   name          = "ssh"
   description   = "Open input ssh port"
   rule {
diff --git a/02-instance-with-volume/060-instance_http.tf b/02-instance-with-volume/060-instance_http.tf
new file mode 100644
index 0000000..c40e732
--- /dev/null
+++ b/02-instance-with-volume/060-instance_http.tf
@@ -0,0 +1,51 @@
+#### INSTANCE HTTP ####
+
+# Get the uiid of image
+data "openstack_images_image_v2" "centos_current" {
+  name        = "${var.image}"
+  most_recent = true
+}
+
+# Create instance
+#
+resource "openstack_compute_instance_v2" "http" {
+  name               = "http-instance"
+  image_name         = "${var.image}"
+  flavor_name        = "${var.flavor_http}"
+  key_pair           = "${openstack_compute_keypair_v2.user_key.name}"
+  user_data          = "${file("scripts/first-boot.sh")}"
+  network {
+    port             = "${openstack_networking_port_v2.http.id}"
+  }
+  # Install system in volume
+  block_device {
+    volume_size           = "${var.volume_http}"
+    destination_type      = "volume"
+    delete_on_termination = true
+    source_type           = "image"
+    uuid                  = "${data.openstack_images_image_v2.centos_current.id}"
+  }
+}
+
+# Create network port
+resource "openstack_networking_port_v2" "http" {
+  name               = "port-instance-http"
+  network_id         = "${openstack_networking_network_v2.generic.id}"
+  admin_state_up     = true
+  security_group_ids = ["${openstack_compute_secgroup_v2.ssh.id}",
+                        "${openstack_compute_secgroup_v2.http.id}"]
+  fixed_ip           = {
+    subnet_id        = "${openstack_networking_subnet_v2.http.id}"
+  }
+}
+
+# Create floating ip
+resource "openstack_networking_floatingip_v2" "http" {
+  pool               = "${var.external_network}"
+}
+
+# Attach floating ip to instance
+resource "openstack_compute_floatingip_associate_v2" "http" {
+  floating_ip        = "${openstack_networking_floatingip_v2.http.address}"
+  instance_id        = "${openstack_compute_instance_v2.http.id}"
+}
diff --git a/02-instance-with-volume/061-instance_db.tf b/02-instance-with-volume/061-instance_db.tf
new file mode 100644
index 0000000..16c0c23
--- /dev/null
+++ b/02-instance-with-volume/061-instance_db.tf
@@ -0,0 +1,51 @@
+#### INSTANCE DB ####
+
+# Create instance
+#
+resource "openstack_compute_instance_v2" "db" {
+  name               = "front01"
+  image_name         = "${var.image}"
+  flavor_name        = "${var.flavor_db}"
+  key_pair           = "${openstack_compute_keypair_v2.user_key.name}"
+  user_data          = "${file("scripts/first-boot.sh")}"
+  network {
+    port             = "${openstack_networking_port_v2.db.id}"
+  }
+}
+
+# Create network port
+resource "openstack_networking_port_v2" "db" {
+  name               = "port-instance-db"
+  network_id         = "${openstack_networking_network_v2.generic.id}"
+  admin_state_up     = true
+  security_group_ids = ["${openstack_compute_secgroup_v2.ssh.id}",
+                        "${openstack_compute_secgroup_v2.db.id}"]
+  fixed_ip           = {
+    subnet_id        = "${openstack_networking_subnet_v2.http.id}"
+  }
+}
+
+# Create floating ip
+resource "openstack_networking_floatingip_v2" "db" {
+  pool               = "${var.external_network}"
+}
+
+# Attach floating ip to instance
+resource "openstack_compute_floatingip_associate_v2" "db" {
+  floating_ip        = "${openstack_networking_floatingip_v2.db.address}"
+  instance_id        = "${openstack_compute_instance_v2.db.id}"
+}
+
+#### VOLUME MANAGEMENT ####
+
+# Create volume
+resource "openstack_blockstorage_volume_v2" "db" {
+  name               = "volume-db"
+  size               = "${var.volume_db}"
+}
+
+# Attach volume to instance instance db
+resource "openstack_compute_volume_attach_v2" "db" {
+  instance_id        = "${openstack_compute_instance_v2.db.id}"
+  volume_id          = "${openstack_blockstorage_volume_v2.db.id}"
+}
diff --git a/02-instance-with-volume/README.md b/02-instance-with-volume/README.md
new file mode 100644
index 0000000..e901663
--- /dev/null
+++ b/02-instance-with-volume/README.md
@@ -0,0 +1,21 @@
+# How to
+
+![infra instance with volume](../img/02-instance-with-volume.png "infra instance with volume")
+
+### Create stack
+
+```
+terraform apply
+```
+
+This script will create:
+-   1 router
+-   1 network
+-   1 instance with attached volume
+-   1 instance with extended size main disk
+
+### delete stack
+
+```
+terraform destroy
+```
diff --git a/02-instance-with-volume/provider.tf b/02-instance-with-volume/provider.tf
new file mode 100644
index 0000000..380f8c6
--- /dev/null
+++ b/02-instance-with-volume/provider.tf
@@ -0,0 +1,7 @@
+# Configure credential OpenStack Provider
+provider "openstack" {
+  user_name   = "my-litle-user"
+  tenant_name = "my-little-tenant"
+  password    = "secret"
+  auth_url    = "http://your-cloud-prodivder.com"
+}
diff --git a/02-server-with-volume/scripts/first-boot.sh b/02-instance-with-volume/scripts/first-boot.sh
similarity index 100%
rename from 02-server-with-volume/scripts/first-boot.sh
rename to 02-instance-with-volume/scripts/first-boot.sh
diff --git a/02-server-with-volume/020-network.tf b/02-server-with-volume/020-network.tf
deleted file mode 100644
index 0095b7b..0000000
--- a/02-server-with-volume/020-network.tf
+++ /dev/null
@@ -1,28 +0,0 @@
-#### NETWORK CONFIGURATION ####
-
-# Router creation
-resource "openstack_networking_router_v2" "router" {
-  name                = "router"
-  external_network_id = "${var.external_gateway}"
-}
-
-#### HTTP NETWORK ####
-
-# Network creation
-resource "openstack_networking_network_v2" "network_http" {
-  name                = "${var.network_http["network_name"]}"
-}
-
-# Network configuration
-resource "openstack_networking_subnet_v2" "subnet_http" {
-  name                = "${var.network_http["subnet_name"]}"
-  network_id          = "${openstack_networking_network_v2.network_http.id}"
-  cidr                = "${var.network_http["cidr"]}"
-  dns_nameservers     = "${var.dns_ip}"
-}
-
-# Router interface configuration
-resource "openstack_networking_router_interface_v2" "router_interface_http" {
-  router_id           = "${openstack_networking_router_v2.router.id}"
-  subnet_id           = "${openstack_networking_subnet_v2.subnet_http.id}"
-}
diff --git a/02-server-with-volume/060-instance_http.tf b/02-server-with-volume/060-instance_http.tf
deleted file mode 100644
index 3ad9e05..0000000
--- a/02-server-with-volume/060-instance_http.tf
+++ /dev/null
@@ -1,51 +0,0 @@
-#### INSTANCE HTTP ####
-
-# Create instance
-#
-resource "openstack_compute_instance_v2" "instance_http" {
-  name               = "front01"
-  image_name         = "${var.image}"
-  flavor_name        = "${var.flavor_http}"
-  key_pair           = "${openstack_compute_keypair_v2.user_key.name}"
-  user_data          = "${file("scripts/first-boot.sh")}"
-  network {
-    port             = "${openstack_networking_port_v2.port_instance_http.id}"
-  }
-}
-
-# Create network port
-resource "openstack_networking_port_v2" "port_instance_http" {
-  name               = "port-instance-http"
-  network_id         = "${openstack_networking_network_v2.network_http.id}"
-  admin_state_up     = true
-  security_group_ids = ["${openstack_compute_secgroup_v2.security_group_ssh.id}",
-                        "${openstack_compute_secgroup_v2.security_group_http.id}"]
-  fixed_ip           = {
-    subnet_id        = "${openstack_networking_subnet_v2.subnet_http.id}"
-  }
-}
-
-# Create floating ip
-resource "openstack_networking_floatingip_v2" "floating_http" {
-  pool               = "${var.external_network}"
-}
-
-# Attach floating ip to instance
-resource "openstack_compute_floatingip_associate_v2" "floating_http" {
-  floating_ip        = "${openstack_networking_floatingip_v2.floating_http.address}"
-  instance_id        = "${openstack_compute_instance_v2.instance_http.id}"
-}
-
-#### VOLUME MANAGEMENT ####
-
-# Create volume
-resource "openstack_blockstorage_volume_v2" "volume_http" {
-  name               = "volume-http"
-  size               = "${var.volume_http}"
-}
-
-# Attach volume to instance server_db_two
-resource "openstack_compute_volume_attach_v2" "volume_attachment" {
-  instance_id        = "${openstack_compute_instance_v2.instance_http.id}"
-  volume_id          = "${openstack_blockstorage_volume_v2.volume_http.id}"
-}
diff --git a/02-server-with-volume/061-instance_db.tf b/02-server-with-volume/061-instance_db.tf
deleted file mode 100644
index cd351a8..0000000
--- a/02-server-with-volume/061-instance_db.tf
+++ /dev/null
@@ -1,51 +0,0 @@
-#### INSTANCE DB ####
-
-# Get the uiid of image
-data "openstack_images_image_v2" "centos_current" {
-  name        = "${var.image}"
-  most_recent = true
-}
-
-# Create instance
-#
-resource "openstack_compute_instance_v2" "instance_db" {
-  name               = "front01"
-  image_name         = "${var.image}"
-  flavor_name        = "${var.flavor_db}"
-  key_pair           = "${openstack_compute_keypair_v2.user_key.name}"
-  user_data          = "${file("scripts/first-boot.sh")}"
-  network {
-    port             = "${openstack_networking_port_v2.port_instance_db.id}"
-  }
-  # Install system in volume
-  block_device {
-    volume_size           = "${var.volume_db}"
-    destination_type      = "volume"
-    delete_on_termination = true
-    source_type           = "image"
-    uuid                  = "${data.openstack_images_image_v2.centos_current.id}"
-  }
-}
-
-# Create network port
-resource "openstack_networking_port_v2" "port_instance_db" {
-  name               = "port-instance-db"
-  network_id         = "${openstack_networking_network_v2.network_http.id}"
-  admin_state_up     = true
-  security_group_ids = ["${openstack_compute_secgroup_v2.security_group_ssh.id}",
-                        "${openstack_compute_secgroup_v2.security_group_db.id}"]
-  fixed_ip           = {
-    subnet_id        = "${openstack_networking_subnet_v2.subnet_http.id}"
-  }
-}
-
-# Create floating ip
-resource "openstack_networking_floatingip_v2" "floating_db" {
-  pool               = "${var.external_network}"
-}
-
-# Attach floating ip to instance
-resource "openstack_compute_floatingip_associate_v2" "floating_db" {
-  floating_ip        = "${openstack_networking_floatingip_v2.floating_db.address}"
-  instance_id        = "${openstack_compute_instance_v2.instance_db.id}"
-}
diff --git a/02-server-with-volume/README.md b/02-server-with-volume/README.md
deleted file mode 100644
index da8d819..0000000
--- a/02-server-with-volume/README.md
+++ /dev/null
@@ -1,20 +0,0 @@
-# Utilisation
-
-
-### Create stack
-
-```
-terraform apply
-```
-
-This script will create:
-  - 1 router
-  - 2 network
-  - 1 instance with attached volume
-  - 1 instance with extended size main disk
-
-### delete stack
-
-```
-terraform destroy
-```
diff --git a/03-instance-with-multiple-network/00-params.tf b/03-instance-with-multiple-network/00-params.tf
index 9476652..de0cf3c 100644
--- a/03-instance-with-multiple-network/00-params.tf
+++ b/03-instance-with-multiple-network/00-params.tf
@@ -1,14 +1,8 @@
-# Configure credential OpenStack Provider
-provider "openstack" {
-  user_name   = "my-litle-user"
-  tenant_name = "my-little-tenant"
-  password    = "secret"
-  auth_url    = "http://your-cloud-prodivder.com"
-}
+# Params file for variables
 
 #### GLANCE
 variable "image" {
-  default = "centos-7"
+  default = "Centos 7"
 }
 
 #### NEUTRON
@@ -32,12 +26,12 @@ variable "flavor_http" {
 
 variable "network_http" {
   default = {
-    network_name = "network-http"
-    subnet_name  = "subnet-http"
-    cidr         = "192.168.1.0/24"
+    subnet_name = "subnet-http"
+    cidr        = "192.168.1.0/24"
   }
 }
 
+# Set how many http instance you will deploy
 variable "desired_capacity_http" {
   default = 2
 }
@@ -49,12 +43,12 @@ variable "flavor_db" {
 
 variable "network_db" {
   default = {
-    network_name = "network-db"
-    subnet_name  = "subnet-db"
-    cidr         = "192.168.2.0/24"
+    subnet_name = "subnet-db"
+    cidr        = "192.168.2.0/24"
   }
 }
 
+# Set how many db instance you will deploy
 variable "desired_capacity_db" {
-  default = 1
+  default = 3
 }
diff --git a/03-instance-with-multiple-network/020-network.tf b/03-instance-with-multiple-network/020-network.tf
index d9eb1cf..876866a 100644
--- a/03-instance-with-multiple-network/020-network.tf
+++ b/03-instance-with-multiple-network/020-network.tf
@@ -3,49 +3,44 @@
 
 
 # Router creation
-resource "openstack_networking_router_v2" "router" {
-  name                = "router"
+resource "openstack_networking_router_v2" "generic" {
+  name                = "router-generic"
   external_network_id = "${var.external_gateway}"
 }
 
-#### HTTP NETWORK ####
-
 # Network creation
-resource "openstack_networking_network_v2" "network_http" {
-  name                = "${var.network_http["network_name"]}"
+resource "openstack_networking_network_v2" "generic" {
+  name                = "network-generic"
 }
 
-# Network configuration
-resource "openstack_networking_subnet_v2" "subnet_http" {
+#### HTTP SUBNET ####
+
+# Subnet http configuration
+resource "openstack_networking_subnet_v2" "http" {
   name                = "${var.network_http["subnet_name"]}"
-  network_id          = "${openstack_networking_network_v2.network_http.id}"
+  network_id          = "${openstack_networking_network_v2.generic.id}"
   cidr                = "${var.network_http["cidr"]}"
   dns_nameservers     = "${var.dns_ip}"
 }
 
 # Router interface configuration
-resource "openstack_networking_router_interface_v2" "router_interface_http" {
-  router_id           = "${openstack_networking_router_v2.router.id}"
-  subnet_id           = "${openstack_networking_subnet_v2.subnet_http.id}"
+resource "openstack_networking_router_interface_v2" "http" {
+  router_id           = "${openstack_networking_router_v2.generic.id}"
+  subnet_id           = "${openstack_networking_subnet_v2.http.id}"
 }
 
-#### DB NETWORK ####
-
-# Network creation
-resource "openstack_networking_network_v2" "network_db" {
-  name                = "${var.network_db["network_name"]}"
-}
+#### DB SUBNET ####
 
-# Network configuration
-resource "openstack_networking_subnet_v2" "subnet_db" {
+# Subnet db configuration
+resource "openstack_networking_subnet_v2" "db" {
   name                = "${var.network_db["subnet_name"]}"
-  network_id          = "${openstack_networking_network_v2.network_db.id}"
+  network_id          = "${openstack_networking_network_v2.generic.id}"
   cidr                = "${var.network_db["cidr"]}"
   dns_nameservers     = "${var.dns_ip}"
 }
 
 # Router interface configuration
-resource "openstack_networking_router_interface_v2" "router_interface_db" {
-  router_id           = "${openstack_networking_router_v2.router.id}"
-  subnet_id           = "${openstack_networking_subnet_v2.subnet_db.id}"
+resource "openstack_networking_router_interface_v2" "db" {
+  router_id           = "${openstack_networking_router_v2.generic.id}"
+  subnet_id           = "${openstack_networking_subnet_v2.db.id}"
 }
diff --git a/03-instance-with-multiple-network/030-security_group.tf b/03-instance-with-multiple-network/030-security_group.tf
index 44d9d53..d36ec3e 100644
--- a/03-instance-with-multiple-network/030-security_group.tf
+++ b/03-instance-with-multiple-network/030-security_group.tf
@@ -1,5 +1,5 @@
 # Acces group, open input port 80 and ssh port
-resource "openstack_compute_secgroup_v2" "security_group_http" {
+resource "openstack_compute_secgroup_v2" "http" {
   name          = "http"
   description   = "Open input http port"
   rule {
@@ -11,7 +11,7 @@ resource "openstack_compute_secgroup_v2" "security_group_http" {
 }
 
 # Open mariadb port
-resource "openstack_compute_secgroup_v2" "security_group_db" {
+resource "openstack_compute_secgroup_v2" "db" {
   name          = "db"
   description   = "Open input db port"
   rule {
@@ -23,7 +23,7 @@ resource "openstack_compute_secgroup_v2" "security_group_db" {
 }
 
 # Open Apache2 port
-resource "openstack_compute_secgroup_v2" "security_group_ssh" {
+resource "openstack_compute_secgroup_v2" "ssh" {
   name          = "ssh"
   description   = "Open input ssh port"
   rule {
diff --git a/03-instance-with-multiple-network/060-instance_http.tf b/03-instance-with-multiple-network/060-instance_http.tf
index e792ab9..819f806 100644
--- a/03-instance-with-multiple-network/060-instance_http.tf
+++ b/03-instance-with-multiple-network/060-instance_http.tf
@@ -2,7 +2,7 @@
 
 # Create instance
 #
-resource "openstack_compute_instance_v2" "instance_http" {
+resource "openstack_compute_instance_v2" "http" {
   count              = "${var.desired_capacity_http}"
   name               = "http-${count.index}"
   image_name         = "${var.image}"
@@ -10,32 +10,32 @@ resource "openstack_compute_instance_v2" "instance_http" {
   key_pair           = "${openstack_compute_keypair_v2.user_key.name}"
   user_data          = "${file("scripts/first-boot.sh")}"
   network {
-    port             = "${element(openstack_networking_port_v2.port_instance_http.*.id, count.index)}"
+    port             = "${element(openstack_networking_port_v2.http.*.id, count.index)}"
   }
 }
 
 # Create network port
-resource "openstack_networking_port_v2" "port_instance_http" {
+resource "openstack_networking_port_v2" "http" {
   count              = "${var.desired_capacity_http}"
   name               = "port-http-${count.index}"
-  network_id         = "${openstack_networking_network_v2.network_http.id}"
+  network_id         = "${openstack_networking_network_v2.generic.id}"
   admin_state_up     = true
-  security_group_ids = ["${openstack_compute_secgroup_v2.security_group_ssh.id}",
-                        "${openstack_compute_secgroup_v2.security_group_http.id}"]
+  security_group_ids = ["${openstack_compute_secgroup_v2.ssh.id}",
+                        "${openstack_compute_secgroup_v2.http.id}"]
   fixed_ip           = {
-    subnet_id        = "${openstack_networking_subnet_v2.subnet_http.id}"
+    subnet_id        = "${openstack_networking_subnet_v2.http.id}"
   }
 }
 
 # Create floating ip
-resource "openstack_networking_floatingip_v2" "floating_http" {
+resource "openstack_networking_floatingip_v2" "http" {
   count              = "${var.desired_capacity_http}"
   pool               = "${var.external_network}"
 }
 
 # Attach floating ip to instance
-resource "openstack_compute_floatingip_associate_v2" "floating_http" {
+resource "openstack_compute_floatingip_associate_v2" "http" {
   count              = "${var.desired_capacity_http}"
-  floating_ip        = "${element(openstack_networking_floatingip_v2.floating_http.*.address, count.index)}"
-  instance_id        = "${element(openstack_compute_instance_v2.instance_http.*.id, count.index)}"
+  floating_ip        = "${element(openstack_networking_floatingip_v2.http.*.address, count.index)}"
+  instance_id        = "${element(openstack_compute_instance_v2.http.*.id, count.index)}"
 }
diff --git a/03-instance-with-multiple-network/061-instance_db.tf b/03-instance-with-multiple-network/061-instance_db.tf
index 15b79a8..e262d1f 100644
--- a/03-instance-with-multiple-network/061-instance_db.tf
+++ b/03-instance-with-multiple-network/061-instance_db.tf
@@ -2,7 +2,7 @@
 
 # Create instance
 #
-resource "openstack_compute_instance_v2" "instance_db" {
+resource "openstack_compute_instance_v2" "db" {
   count              = "${var.desired_capacity_db}"
   name               = "db-${count.index}"
   image_name         = "${var.image}"
@@ -10,32 +10,32 @@ resource "openstack_compute_instance_v2" "instance_db" {
   key_pair           = "${openstack_compute_keypair_v2.user_key.name}"
   user_data          = "${file("scripts/first-boot.sh")}"
   network {
-    port             = "${element(openstack_networking_port_v2.port_instance_db.*.id, count.index)}"
+    port             = "${element(openstack_networking_port_v2.db.*.id, count.index)}"
   }
 }
 
 # Create network port
-resource "openstack_networking_port_v2" "port_instance_db" {
+resource "openstack_networking_port_v2" "db" {
   count              = "${var.desired_capacity_db}"
   name               = "port-db-${count.index}"
-  network_id         = "${openstack_networking_network_v2.network_db.id}"
+  network_id         = "${openstack_networking_network_v2.generic.id}"
   admin_state_up     = true
-  security_group_ids = ["${openstack_compute_secgroup_v2.security_group_ssh.id}",
-                        "${openstack_compute_secgroup_v2.security_group_db.id}"]
+  security_group_ids = ["${openstack_compute_secgroup_v2.ssh.id}",
+                        "${openstack_compute_secgroup_v2.db.id}"]
   fixed_ip           = {
-    subnet_id        = "${openstack_networking_subnet_v2.subnet_db.id}"
+    subnet_id        = "${openstack_networking_subnet_v2.db.id}"
   }
 }
 
 # Create floating ip
-resource "openstack_networking_floatingip_v2" "floating_db" {
+resource "openstack_networking_floatingip_v2" "db" {
   count              = "${var.desired_capacity_db}"
   pool               = "${var.external_network}"
 }
 
 # Attach floating ip to instance
-resource "openstack_compute_floatingip_associate_v2" "floating_db" {
+resource "openstack_compute_floatingip_associate_v2" "db" {
   count              = "${var.desired_capacity_db}"
-  floating_ip        = "${element(openstack_networking_floatingip_v2.floating_db.*.address, count.index)}"
-  instance_id        = "${element(openstack_compute_instance_v2.instance_db.*.id, count.index)}"
+  floating_ip        = "${element(openstack_networking_floatingip_v2.db.*.address, count.index)}"
+  instance_id        = "${element(openstack_compute_instance_v2.db.*.id, count.index)}"
 }
diff --git a/03-instance-with-multiple-network/README.md b/03-instance-with-multiple-network/README.md
index 97aa371..cf81aea 100644
--- a/03-instance-with-multiple-network/README.md
+++ b/03-instance-with-multiple-network/README.md
@@ -1,20 +1,22 @@
-# Utilisation
+# How to
 
-![schéma d'infrastructure pool-with-multiple-network](img/pool-with-multiple-network.png "schéma d'infrastructure pool-with-multiple-network")
+![infra instance with multiple network](../img/03-multiple-network.png "infra instance with multiple network")
 
-### Création de l'infrastructure
+### Create stack
 
 ```
 terraform apply
 ```
 
-Ce script créera:
-  - 1 routeur
-  - 2 network
-  - 2 instances http
-  - 1 pool avec entre 1 et 3 instances
+This script will create:
+-   1 router
+-   2 networks
+-   2 http instances
+-   3 db instances
 
-### Suppresion de l'infrastructure
+The number of db instance will be define with Terraform "count" parameters
+
+### Delete stack
 
 ```
 terraform destroy
diff --git a/03-instance-with-multiple-network/provider.tf b/03-instance-with-multiple-network/provider.tf
new file mode 100644
index 0000000..380f8c6
--- /dev/null
+++ b/03-instance-with-multiple-network/provider.tf
@@ -0,0 +1,7 @@
+# Configure credential OpenStack Provider
+provider "openstack" {
+  user_name   = "my-litle-user"
+  tenant_name = "my-little-tenant"
+  password    = "secret"
+  auth_url    = "http://your-cloud-prodivder.com"
+}
diff --git a/04-instance-with-loadbalancer/00-params.tf b/04-instance-with-loadbalancer/00-params.tf
index 38e2f8b..b85f93b 100644
--- a/04-instance-with-loadbalancer/00-params.tf
+++ b/04-instance-with-loadbalancer/00-params.tf
@@ -1,14 +1,8 @@
-# Configure credential OpenStack Provider
-provider "openstack" {
-  user_name   = "my-litle-user"
-  tenant_name = "my-little-tenant"
-  password    = "secret"
-  auth_url    = "http://your-cloud-prodivder.com"
-}
+# Params file for variables
 
 #### GLANCE
 variable "image" {
-  default = "centos-7"
+  default = "Centos 7"
 }
 
 #### NEUTRON
@@ -32,9 +26,8 @@ variable "flavor_http" {
 
 variable "network_http" {
   default = {
-    network_name = "network-http"
-    subnet_name  = "subnet-http"
-    cidr         = "192.168.1.0/24"
+    subnet_name = "subnet-http"
+    cidr        = "192.168.1.0/24"
   }
 }
 
@@ -49,9 +42,8 @@ variable "flavor_db" {
 
 variable "network_db" {
   default = {
-    network_name = "network-db"
-    subnet_name  = "subnet-db"
-    cidr         = "192.168.2.0/24"
+    subnet_name = "subnet-db"
+    cidr        = "192.168.2.0/24"
   }
 }
 
diff --git a/04-instance-with-loadbalancer/020-network.tf b/04-instance-with-loadbalancer/020-network.tf
index d9eb1cf..468e98c 100644
--- a/04-instance-with-loadbalancer/020-network.tf
+++ b/04-instance-with-loadbalancer/020-network.tf
@@ -1,51 +1,44 @@
 #### NETWORK CONFIGURATION ####
 
-
-
 # Router creation
-resource "openstack_networking_router_v2" "router" {
+resource "openstack_networking_router_v2" "generic" {
   name                = "router"
   external_network_id = "${var.external_gateway}"
 }
 
-#### HTTP NETWORK ####
-
 # Network creation
-resource "openstack_networking_network_v2" "network_http" {
-  name                = "${var.network_http["network_name"]}"
+resource "openstack_networking_network_v2" "generic" {
+  name                = "network-generic"
 }
 
-# Network configuration
-resource "openstack_networking_subnet_v2" "subnet_http" {
+#### HTTP SUBNET ####
+
+# Subnet http configuration
+resource "openstack_networking_subnet_v2" "http" {
   name                = "${var.network_http["subnet_name"]}"
-  network_id          = "${openstack_networking_network_v2.network_http.id}"
+  network_id          = "${openstack_networking_network_v2.generic.id}"
   cidr                = "${var.network_http["cidr"]}"
   dns_nameservers     = "${var.dns_ip}"
 }
 
 # Router interface configuration
-resource "openstack_networking_router_interface_v2" "router_interface_http" {
-  router_id           = "${openstack_networking_router_v2.router.id}"
-  subnet_id           = "${openstack_networking_subnet_v2.subnet_http.id}"
+resource "openstack_networking_router_interface_v2" "http" {
+  router_id           = "${openstack_networking_router_v2.generic.id}"
+  subnet_id           = "${openstack_networking_subnet_v2.http.id}"
 }
 
 #### DB NETWORK ####
 
-# Network creation
-resource "openstack_networking_network_v2" "network_db" {
-  name                = "${var.network_db["network_name"]}"
-}
-
-# Network configuration
-resource "openstack_networking_subnet_v2" "subnet_db" {
+# Subnet db configuration
+resource "openstack_networking_subnet_v2" "db" {
   name                = "${var.network_db["subnet_name"]}"
-  network_id          = "${openstack_networking_network_v2.network_db.id}"
+  network_id          = "${openstack_networking_network_v2.generic.id}"
   cidr                = "${var.network_db["cidr"]}"
   dns_nameservers     = "${var.dns_ip}"
 }
 
 # Router interface configuration
-resource "openstack_networking_router_interface_v2" "router_interface_db" {
-  router_id           = "${openstack_networking_router_v2.router.id}"
-  subnet_id           = "${openstack_networking_subnet_v2.subnet_db.id}"
+resource "openstack_networking_router_interface_v2" "db" {
+  router_id           = "${openstack_networking_router_v2.generic.id}"
+  subnet_id           = "${openstack_networking_subnet_v2.db.id}"
 }
diff --git a/04-instance-with-loadbalancer/030-security_group.tf b/04-instance-with-loadbalancer/030-security_group.tf
index 44d9d53..d36ec3e 100644
--- a/04-instance-with-loadbalancer/030-security_group.tf
+++ b/04-instance-with-loadbalancer/030-security_group.tf
@@ -1,5 +1,5 @@
 # Acces group, open input port 80 and ssh port
-resource "openstack_compute_secgroup_v2" "security_group_http" {
+resource "openstack_compute_secgroup_v2" "http" {
   name          = "http"
   description   = "Open input http port"
   rule {
@@ -11,7 +11,7 @@ resource "openstack_compute_secgroup_v2" "security_group_http" {
 }
 
 # Open mariadb port
-resource "openstack_compute_secgroup_v2" "security_group_db" {
+resource "openstack_compute_secgroup_v2" "db" {
   name          = "db"
   description   = "Open input db port"
   rule {
@@ -23,7 +23,7 @@ resource "openstack_compute_secgroup_v2" "security_group_db" {
 }
 
 # Open Apache2 port
-resource "openstack_compute_secgroup_v2" "security_group_ssh" {
+resource "openstack_compute_secgroup_v2" "ssh" {
   name          = "ssh"
   description   = "Open input ssh port"
   rule {
diff --git a/04-instance-with-loadbalancer/060-instance_http.tf b/04-instance-with-loadbalancer/060-instance_http.tf
index 1aa1817..b08ea84 100644
--- a/04-instance-with-loadbalancer/060-instance_http.tf
+++ b/04-instance-with-loadbalancer/060-instance_http.tf
@@ -2,7 +2,7 @@
 
 # Create instance
 #
-resource "openstack_compute_instance_v2" "instance_http" {
+resource "openstack_compute_instance_v2" "http" {
   count              = "${var.desired_capacity_http}"
   name               = "http-${count.index}"
   image_name         = "${var.image}"
@@ -10,19 +10,19 @@ resource "openstack_compute_instance_v2" "instance_http" {
   key_pair           = "${openstack_compute_keypair_v2.user_key.name}"
   user_data          = "${file("scripts/first-boot.sh")}"
   network {
-    port             = "${element(openstack_networking_port_v2.port_instance_http.*.id, count.index)}"
+    port             = "${element(openstack_networking_port_v2.http.*.id, count.index)}"
   }
 }
 
 # Create network port
-resource "openstack_networking_port_v2" "port_instance_http" {
+resource "openstack_networking_port_v2" "http" {
   count              = "${var.desired_capacity_http}"
   name               = "port-http-${count.index}"
-  network_id         = "${openstack_networking_network_v2.network_http.id}"
+  network_id         = "${openstack_networking_network_v2.generic.id}"
   admin_state_up     = true
-  security_group_ids = ["${openstack_compute_secgroup_v2.security_group_ssh.id}",
-                        "${openstack_compute_secgroup_v2.security_group_http.id}"]
+  security_group_ids = ["${openstack_compute_secgroup_v2.ssh.id}",
+                        "${openstack_compute_secgroup_v2.http.id}"]
   fixed_ip           = {
-    subnet_id        = "${openstack_networking_subnet_v2.subnet_http.id}"
+    subnet_id        = "${openstack_networking_subnet_v2.http.id}"
   }
 }
diff --git a/04-instance-with-loadbalancer/061-instance_db.tf b/04-instance-with-loadbalancer/061-instance_db.tf
index 1399cd4..5f5c833 100644
--- a/04-instance-with-loadbalancer/061-instance_db.tf
+++ b/04-instance-with-loadbalancer/061-instance_db.tf
@@ -2,7 +2,7 @@
 
 # Create instance
 #
-resource "openstack_compute_instance_v2" "instance_db" {
+resource "openstack_compute_instance_v2" "db" {
   count              = "${var.desired_capacity_db}"
   name               = "db-${count.index}"
   image_name         = "${var.image}"
@@ -10,19 +10,19 @@ resource "openstack_compute_instance_v2" "instance_db" {
   key_pair           = "${openstack_compute_keypair_v2.user_key.name}"
   user_data          = "${file("scripts/first-boot.sh")}"
   network {
-    port             = "${element(openstack_networking_port_v2.port_instance_db.*.id, count.index)}"
+    port             = "${element(openstack_networking_port_v2.db.*.id, count.index)}"
   }
 }
 
 # Create network port
-resource "openstack_networking_port_v2" "port_instance_db" {
+resource "openstack_networking_port_v2" "db" {
   count              = "${var.desired_capacity_db}"
   name               = "port-db-${count.index}"
-  network_id         = "${openstack_networking_network_v2.network_db.id}"
+  network_id         = "${openstack_networking_network_v2.generic.id}"
   admin_state_up     = true
-  security_group_ids = ["${openstack_compute_secgroup_v2.security_group_ssh.id}",
-                        "${openstack_compute_secgroup_v2.security_group_db.id}"]
+  security_group_ids = ["${openstack_compute_secgroup_v2.ssh.id}",
+                        "${openstack_compute_secgroup_v2.db.id}"]
   fixed_ip           = {
-    subnet_id        = "${openstack_networking_subnet_v2.subnet_db.id}"
+    subnet_id        = "${openstack_networking_subnet_v2.db.id}"
   }
 }
diff --git a/04-instance-with-loadbalancer/070-loadbalancer.tf b/04-instance-with-loadbalancer/070-loadbalancer.tf
index be332b0..c0630af 100644
--- a/04-instance-with-loadbalancer/070-loadbalancer.tf
+++ b/04-instance-with-loadbalancer/070-loadbalancer.tf
@@ -1,115 +1,115 @@
 # HTTP LOAD BALANCER CONFIGURATION
 #
 # Create loadbalancer
-resource "openstack_lb_loadbalancer_v2" "elastic_loadbalancer_http" {
+resource "openstack_lb_loadbalancer_v2" "http" {
   name            = "elastic_loadbalancer_http"
-  vip_subnet_id   = "${openstack_networking_subnet_v2.subnet_http.id}"
+  vip_subnet_id   = "${openstack_networking_subnet_v2.http.id}"
   depends_on      = [
-    "openstack_compute_instance_v2.instance_http"
+    "openstack_compute_instance_v2.http"
   ]
 }
 
 # Create listener
-resource "openstack_lb_listener_v2" "listener_http" {
+resource "openstack_lb_listener_v2" "http" {
   name            = "listener_http"
   protocol        = "TCP"
   protocol_port   = 80
-  loadbalancer_id = "${openstack_lb_loadbalancer_v2.elastic_loadbalancer_http.id}"
+  loadbalancer_id = "${openstack_lb_loadbalancer_v2.http.id}"
   depends_on      = [
-      "openstack_lb_loadbalancer_v2.elastic_loadbalancer_http",
+      "openstack_lb_loadbalancer_v2.http",
     ]
 }
 
 # Set methode for load balance charge between instance
-resource "openstack_lb_pool_v2" "pool_http" {
+resource "openstack_lb_pool_v2" "http" {
   name            = "pool_http"
   protocol        = "TCP"
   lb_method       = "ROUND_ROBIN"
-  listener_id     = "${openstack_lb_listener_v2.listener_http.id}"
+  listener_id     = "${openstack_lb_listener_v2.http.id}"
   depends_on      = [
-      "openstack_lb_listener_v2.listener_http",
+      "openstack_lb_listener_v2.http",
     ]
 }
 
 # Add multip instances to pool
-resource "openstack_lb_member_v2" "member_http" {
+resource "openstack_lb_member_v2" "http" {
   count           = "${var.desired_capacity_http}"
-  address         = "${element(openstack_compute_instance_v2.instance_http.*.access_ip_v4, count.index)}"
+  address         = "${element(openstack_compute_instance_v2.http.*.access_ip_v4, count.index)}"
   protocol_port   = 80
-  pool_id         = "${openstack_lb_pool_v2.pool_http.id}"
-  subnet_id       = "${openstack_networking_subnet_v2.subnet_http.id}"
+  pool_id         = "${openstack_lb_pool_v2.http.id}"
+  subnet_id       = "${openstack_networking_subnet_v2.http.id}"
   depends_on      = [
-      "openstack_lb_pool_v2.pool_http",
+      "openstack_lb_pool_v2.http",
     ]
 }
 
 # Create health monitor for check services instances status
-resource "openstack_lb_monitor_v2" "monitor_http" {
+resource "openstack_lb_monitor_v2" "http" {
   name            = "monitor_http"
-  pool_id         = "${openstack_lb_pool_v2.pool_http.id}"
+  pool_id         = "${openstack_lb_pool_v2.http.id}"
   type            = "TCP"
   delay           = 2
   timeout         = 2
   max_retries     = 2
   depends_on      = [
-      "openstack_lb_member_v2.member_http",
+      "openstack_lb_member_v2.http",
     ]
 }
 
 # DB LOAD BALANCER CONFIGURATION
 #
 # Create loadbalancer
-resource "openstack_lb_loadbalancer_v2" "elastic_loadbalancer_db" {
+resource "openstack_lb_loadbalancer_v2" "db" {
   name            = "elastic_loadbalancer_db"
-  vip_subnet_id   = "${openstack_networking_subnet_v2.subnet_db.id}"
+  vip_subnet_id   = "${openstack_networking_subnet_v2.db.id}"
   depends_on      = [
-    "openstack_compute_instance_v2.instance_db"
+    "openstack_compute_instance_v2.db"
   ]
 }
 
 # Create listener
-resource "openstack_lb_listener_v2" "listener_db" {
+resource "openstack_lb_listener_v2" "db" {
   name            = "listener_db"
   protocol        = "TCP"
   protocol_port   = 3306
-  loadbalancer_id = "${openstack_lb_loadbalancer_v2.elastic_loadbalancer_db.id}"
+  loadbalancer_id = "${openstack_lb_loadbalancer_v2.db.id}"
   depends_on      = [
-      "openstack_lb_loadbalancer_v2.elastic_loadbalancer_db",
+      "openstack_lb_loadbalancer_v2.db",
     ]
 }
 
 # Set methode for load balance charge between instance
-resource "openstack_lb_pool_v2" "pool_db" {
+resource "openstack_lb_pool_v2" "db" {
   name            = "pool_db"
   protocol        = "TCP"
   lb_method       = "ROUND_ROBIN"
-  listener_id     = "${openstack_lb_listener_v2.listener_db.id}"
+  listener_id     = "${openstack_lb_listener_v2.db.id}"
   depends_on      = [
-      "openstack_lb_listener_v2.listener_db",
+      "openstack_lb_listener_v2.db",
     ]
 }
 
 # Add multip instances to pool
-resource "openstack_lb_member_v2" "member_db" {
+resource "openstack_lb_member_v2" "db" {
   count           = "${var.desired_capacity_db}"
-  address         = "${element(openstack_compute_instance_v2.instance_db.*.access_ip_v4, count.index)}"
+  address         = "${element(openstack_compute_instance_v2.db.*.access_ip_v4, count.index)}"
   protocol_port   = 3306
-  pool_id         = "${openstack_lb_pool_v2.pool_db.id}"
-  subnet_id       = "${openstack_networking_subnet_v2.subnet_db.id}"
+  pool_id         = "${openstack_lb_pool_v2.db.id}"
+  subnet_id       = "${openstack_networking_subnet_v2.db.id}"
   depends_on      = [
-      "openstack_lb_pool_v2.pool_db",
+      "openstack_lb_pool_v2.db",
     ]
 }
 
 # Create health monitor for check services instances status
-resource "openstack_lb_monitor_v2" "monitor_db" {
+resource "openstack_lb_monitor_v2" "db" {
   name            = "monitor_db"
-  pool_id         = "${openstack_lb_pool_v2.pool_db.id}"
+  pool_id         = "${openstack_lb_pool_v2.db.id}"
   type            = "TCP"
   delay           = 2
   timeout         = 2
   max_retries     = 2
   depends_on      = [
-      "openstack_lb_member_v2.member_db",
+      "openstack_lb_member_v2.db",
     ]
 }
diff --git a/04-instance-with-loadbalancer/README.md b/04-instance-with-loadbalancer/README.md
index 7e2471b..5fe9fac 100644
--- a/04-instance-with-loadbalancer/README.md
+++ b/04-instance-with-loadbalancer/README.md
@@ -1,5 +1,6 @@
 # Utilisation
 
+![instance with load balancer](../img/04-load-balancer.png "instance with load balancer")
 
 ### Create stack
 
@@ -8,12 +9,12 @@ terraform apply
 ```
 
 This script will create:
-  - 1 router
-  - 2 network
-  - 2 instance http
-  - 3 instance db
+-   1 router
+-   2 network
+-   2 http instances
+-   3 db instances
 
-### Suppresion de l'infrastructure
+### Delete stack
 
 ```
 terraform destroy
diff --git a/04-instance-with-loadbalancer/provider.tf b/04-instance-with-loadbalancer/provider.tf
new file mode 100644
index 0000000..380f8c6
--- /dev/null
+++ b/04-instance-with-loadbalancer/provider.tf
@@ -0,0 +1,7 @@
+# Configure credential OpenStack Provider
+provider "openstack" {
+  user_name   = "my-litle-user"
+  tenant_name = "my-little-tenant"
+  password    = "secret"
+  auth_url    = "http://your-cloud-prodivder.com"
+}
diff --git a/img/01-sample-instance.png b/img/01-sample-instance.png
new file mode 100644
index 0000000..d300598
Binary files /dev/null and b/img/01-sample-instance.png differ
diff --git a/img/02-instance-with-volume.png b/img/02-instance-with-volume.png
new file mode 100644
index 0000000..aec365b
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diff --git a/img/03-multiple-network.png b/img/03-multiple-network.png
new file mode 100644
index 0000000..6539118
Binary files /dev/null and b/img/03-multiple-network.png differ
diff --git a/img/04-load-balancer.png b/img/04-load-balancer.png
new file mode 100644
index 0000000..4a8b729
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