diff --git a/doc/source/contributor/vagrant_devstack.rst b/doc/source/contributor/vagrant_devstack.rst
index f683fa67c..96b081d59 100644
--- a/doc/source/contributor/vagrant_devstack.rst
+++ b/doc/source/contributor/vagrant_devstack.rst
@@ -70,7 +70,7 @@ Setup Configuration File
 
    .. code-block:: console
 
-       $ ssh -F ssh_config controller
+       $ ssh -F /path/to/tacker/vagrant/devstack/ssh_config controller
 
 Setup ``machines.yml`` which is a config file defines parameters of each
 VM you deploy.
@@ -155,7 +155,7 @@ describing how you configure the file.
 
 .. code-block:: console
 
-    $ ansible-playbook -i hosts site.yml
+    $ ansible-playbook -i hosts site.yaml
 
 After finished all tasks, you can login to the launched VMs. So, login to
 controller node and run ``stack.sh`` for installing OpenStack.
@@ -167,7 +167,7 @@ if you customize it furthermore by yourself.
 
 .. code-block:: console
 
-    $ ssh stack@192.168.33.11
+    $ ssh stack@192.168.56.11
     $ cd devstack
     $ YOUR_FAVORITE_EDITOR local.conf
     $ ./stack.sh
diff --git a/vagrant/devstack/README.md b/vagrant/devstack/README.md
index 68d089d3f..1ac3d9749 100644
--- a/vagrant/devstack/README.md
+++ b/vagrant/devstack/README.md
@@ -1,4 +1,4 @@
-# vagrant-devstack
+# Devstack Installer for Tacker
 
 ## What is this
 
@@ -65,19 +65,23 @@ There are some parameters in `group_vars/all.yml` such as password on devstack
 or optional configurations. You don't need to update it usually.
 
 ```sh
-$ ansible-playbook -i hosts site.yml
+$ ansible-playbook -i hosts site.yaml
 ```
 
-After finished ansible's tasks, you can login to launched VMs. So, login to
-controller node and run `stack.sh` for installing OpenStack. You will find that
-`local.conf` is prepared for your environment by using its example.
-See instruction how to configure `local.conf` described in
-[DevStack Quick Start](https://docs.openstack.org/devstack/latest/)
-if you customize it by yourself.
+After finished ansible's tasks, you can login to launched VMs with hostname you
+defined in `machines.yml`.
+So, let's login to controller node and OpenStack. You will find that two
+examples of `local.conf` are prepared in `$HOME/devstack` for your environment.
+
+* local.conf.example
+* local.conf.kubernetes
 
 ```sh
-$ ssh stack@192.168.33.11
+$ ssh stack@192.168.56.11
 $ cd devstack
-$ YOUR_FAVORITE_EDITOR local.conf
+$ cp local.conf.kubernetes local.conf
 $ ./stack.sh
 ```
+
+See instruction how to configure `local.conf` described in
+[DevStack Quick Start](https://docs.openstack.org/devstack/latest/).
diff --git a/vagrant/devstack/group_vars/all.yml b/vagrant/devstack/group_vars/all.yml
index 56f56e325..36e2066a5 100644
--- a/vagrant/devstack/group_vars/all.yml
+++ b/vagrant/devstack/group_vars/all.yml
@@ -10,8 +10,8 @@ service_password: devstack
 service_token: devstack
 
 # compute nodes
-service_host: 192.168.33.11
-floating_range: 192.168.33.128/25
+service_host: 192.168.56.11
+floating_range: 192.168.56.128/25
 fixed_range: 10.4.128.0/20
 
 # 2. Configure optional tools on controller node
diff --git a/vagrant/devstack/hosts b/vagrant/devstack/hosts
index 66e4ab425..578290b57 100644
--- a/vagrant/devstack/hosts
+++ b/vagrant/devstack/hosts
@@ -1,9 +1,9 @@
 [ubuntu-focal.controller]
-192.168.33.11
+192.168.56.11
 
 [ubuntu-focal.compute]
-#192.168.33.12
-#192.168.33.13
+#192.168.56.12
+#192.168.56.13
 
 [centos-stream8.controller]
-#192.168.33.11
+#192.168.56.14
diff --git a/vagrant/devstack/lib/machine.rb b/vagrant/devstack/lib/machine.rb
index a76c6b67a..11ba221d7 100644
--- a/vagrant/devstack/lib/machine.rb
+++ b/vagrant/devstack/lib/machine.rb
@@ -9,7 +9,7 @@ class Machines < Array
     def initialize(
       hostname="controller", provider="virtualbox", box="ubuntu/focal64",
       nof_cpus=2, mem_size=4, disk_size=10,
-      private_ips=["192.168.33.11"], public_ips=nil, ssh_forward_x11=false,
+      private_ips=["192.168.56.11"], public_ips=nil, ssh_forward_x11=false,
       fwd_port_list=nil)
       @hostname = hostname
       @provider = provider
diff --git a/vagrant/devstack/samples/machines-2nodes.yml b/vagrant/devstack/samples/machines-2nodes.yml
index 9ba596103..ca9a2a8e8 100644
--- a/vagrant/devstack/samples/machines-2nodes.yml
+++ b/vagrant/devstack/samples/machines-2nodes.yml
@@ -7,17 +7,15 @@ machines:
   - hostname: controller
     provider: virtualbox
     box: ubuntu/focal64
-    nof_cpus: 2
-    mem_size: 4
-    disk_size: 20
+    nof_cpus: 4
+    mem_size: 12
+    disk_size: 50
     private_ips:
-      - 192.168.33.11
+      - 192.168.56.11
     public_ips:
     fwd_port_list:
       - guest: 80
-        host: 10080
-      - guest: 6081
-        host: 6081
+        host: 20080
 
   - hostname: compute
     provider: virtualbox
@@ -26,10 +24,6 @@ machines:
     mem_size: 8
     disk_size: 50
     private_ips:
-      - 192.168.34.11
+      - 192.168.56.12
     public_ips:
     fwd_port_list:
-      - guest: 80
-        host: 10081
-      - guest: 6081
-        host: 6081
diff --git a/vagrant/devstack/samples/machines.yml b/vagrant/devstack/samples/machines.yml
index 8f7cf3c1c..16ec9ba42 100644
--- a/vagrant/devstack/samples/machines.yml
+++ b/vagrant/devstack/samples/machines.yml
@@ -9,13 +9,11 @@ machines:
     # Supported boxes are `ubuntu/focal64`, `centos/stream8`.
     box: ubuntu/focal64
     nof_cpus: 4
-    mem_size: 8
+    mem_size: 12
     disk_size: 50
     private_ips:
-      - 192.168.33.11
+      - 192.168.56.11
     public_ips:
     fwd_port_list:
       - guest: 80
-        host: 10080
-      - guest: 6081
-        host: 6081
+        host: 20080