diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..997ca2f
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1 @@
+.vagrant
\ No newline at end of file
diff --git a/chapter3/Vagrantfile b/chapter3/Vagrantfile
new file mode 100644
index 0000000..ee8abc3
--- /dev/null
+++ b/chapter3/Vagrantfile
@@ -0,0 +1,42 @@
+# -*- mode: ruby -*-
+# vi: set ft=ruby :
+
+Vagrant.require_version ">= 1.6.0"
+
+boxes = [
+    {
+        :name => "docker-host",
+        :eth1 => "192.168.205.10",
+        :mem => "1024",
+        :cpu => "1"
+    }
+]
+
+Vagrant.configure(2) do |config|
+
+  config.vm.box = "centos/7"
+  config.vm.synced_folder ".", "/home/docker-host/"
+  boxes.each do |opts|
+    config.vm.define opts[:name] do |config|
+      config.vm.hostname = opts[:name]
+      config.vm.provider "vmware_fusion" do |v|
+        v.vmx["memsize"] = opts[:mem]
+        v.vmx["numvcpus"] = opts[:cpu]
+      end
+      config.vm.provider "virtualbox" do |v|
+        v.customize ["modifyvm", :id, "--memory", opts[:mem]]
+        v.customize ["modifyvm", :id, "--cpus", opts[:cpu]]
+      end
+      config.vm.network :private_network, ip: opts[:eth1]
+    end
+  end
+  config.vm.provision "shell", inline: <<-SHELL
+    # https://docs.docker.com/engine/installation/linux/docker-ce/centos/
+    # https://github.com/docker/docker-install
+    sudo yum install -y git vim gcc glibc-static telnet
+    git clone sudo yum install -y git vim gcc glibc-static telnet
+    curl -fsSL get.docker.com -o get-docker.sh
+    sh get-docker.sh
+    sudo systemctl start docker
+  SHELL
+end
diff --git a/chapter4/Vagrantfile b/chapter4/Vagrantfile
new file mode 100644
index 0000000..7d79c3d
--- /dev/null
+++ b/chapter4/Vagrantfile
@@ -0,0 +1,54 @@
+# -*- mode: ruby -*-
+# vi: set ft=ruby :
+
+Vagrant.require_version ">= 1.6.0"
+
+boxes = [
+    {
+        :name => "docker-node1",
+        :eth1 => "192.168.205.10",
+        :mem => "1024",
+        :cpu => "1",
+        :port => "8888"
+    },
+    {
+        :name => "docker-node2",
+        :eth1 => "192.168.205.11",
+        :mem => "1024",
+        :cpu => "1",
+        :port => "9999"
+    }
+]
+
+Vagrant.configure(2) do |config|
+
+  config.vm.box = "centos/7"
+
+  boxes.each do |opts|
+      config.vm.define opts[:name] do |config|
+        config.vm.hostname = opts[:name]
+        config.vm.network "forwarded_port", guest: 80, host: opts[:port]
+        config.vm.provider "vmware_fusion" do |v|
+          v.vmx["memsize"] = opts[:mem]
+          v.vmx["numvcpus"] = opts[:cpu]
+        end
+
+        config.vm.provider "virtualbox" do |v|
+          v.customize ["modifyvm", :id, "--memory", opts[:mem]]
+          v.customize ["modifyvm", :id, "--cpus", opts[:cpu]]
+        end
+
+        config.vm.network :private_network, ip: opts[:eth1]
+      end
+  end
+
+  config.vm.provision "shell", inline: <<-SHELL
+    # https://docs.docker.com/engine/installation/linux/docker-ce/centos/
+    # https://github.com/docker/docker-install
+    sudo yum install -y git vim gcc glibc-static telnet
+    git clone sudo yum install -y git vim gcc glibc-static telnet
+    curl -fsSL get.docker.com -o get-docker.sh
+    sh get-docker.sh
+    sudo systemctl start docker
+  SHELL
+end
diff --git a/chapter4/flask-redis/Dockerfile b/chapter4/flask-redis/Dockerfile
new file mode 100644
index 0000000..ce41921
--- /dev/null
+++ b/chapter4/flask-redis/Dockerfile
@@ -0,0 +1,7 @@
+FROM python:2.7
+LABEL maintaner="Peng Xiao xiaoquwl@gmail.com"
+COPY . /app
+WORKDIR /app
+RUN pip install flask redis
+EXPOSE 5000
+CMD [ "python", "app.py" ]
\ No newline at end of file
diff --git a/chapter4/flask-redis/app.py b/chapter4/flask-redis/app.py
new file mode 100644
index 0000000..23728cc
--- /dev/null
+++ b/chapter4/flask-redis/app.py
@@ -0,0 +1,17 @@
+from flask import Flask
+from redis import Redis
+import os
+import socket
+
+app = Flask(__name__)
+redis = Redis(host=os.environ.get('REDIS_HOST', '127.0.0.1'), port=6379)
+
+
+@app.route('/')
+def hello():
+    redis.incr('hits')
+    return 'Hello Container World! I have been seen %s times and my hostname is %s.\n' % (redis.get('hits'),socket.gethostname())
+
+
+if __name__ == "__main__":
+    app.run(host="0.0.0.0", port=5000, debug=True)