diff --git a/install_docker.sh b/install_docker.sh
index 999712c..34691d1 100644
--- a/install_docker.sh
+++ b/install_docker.sh
@@ -1,26 +1,63 @@
 #!/bin/bash
 #####		CentOS 7安装Docker		#####
 
-cd
-mkdir temp
-cd temp
+function install_docker(){
+	cd
+	mkdir temp
+	cd temp
 
-#下载
-wget https://download.docker.com/linux/centos/7/x86_64/stable/Packages/containerd.io-1.3.9-3.1.el7.x86_64.rpm
-wget https://download.docker.com/linux/centos/7/x86_64/stable/Packages/docker-ce-19.03.9-3.el7.x86_64.rpm
-wget https://download.docker.com/linux/centos/7/x86_64/stable/Packages/docker-ce-cli-19.03.9-3.el7.x86_64.rpm
+	#下载
+	wget https://download.docker.com/linux/centos/7/x86_64/stable/Packages/containerd.io-1.3.9-3.1.el7.x86_64.rpm
+	wget https://download.docker.com/linux/centos/7/x86_64/stable/Packages/docker-ce-19.03.9-3.el7.x86_64.rpm
+	wget https://download.docker.com/linux/centos/7/x86_64/stable/Packages/docker-ce-cli-19.03.9-3.el7.x86_64.rpm
 
-#安装
-yum -y install containerd.io-1.3.9-3.1.el7.x86_64.rpm
-yum -y install docker-ce-19.03.9-3.el7.x86_64.rpm
-yum -y install docker-ce-cli-19.03.9-3.el7.x86_64.rpm
+	#安装
+	yum -y install containerd.io-1.3.9-3.1.el7.x86_64.rpm
+	yum -y install docker-ce-19.03.9-3.el7.x86_64.rpm
+	yum -y install docker-ce-cli-19.03.9-3.el7.x86_64.rpm
+	#cd && rm -rf temp
+}
 
-#启动docker
-systemctl start docker
-#开机启动
-systemctl enable docker
+#配置存储目录
+function set_storage() {
+	user add -g docker docker
+	mkdir -p /etc/docker
+	#创建配置文件
+	touch /etc/docker/daemon.json
+	#创建存储目录
+	mkdir -p /data/docker-data
+	chown -R docker:docker /data/docker-data
+cat <<EOF > /etc/docker/daemon.json
+{
+    "data-root": "/data/docker-data",
+    "storage-driver": "overlay2"
+}
+EOF
+}
+#install systemc
+function install_systemd() {
+	cd && cd temp
+	wget -O docker.service 
+https://raw.githubusercontent.com/moby/moby/master/contrib/init/systemd/docker.service.rpm
+	mv docker.service /etc/systemd/system
+	systemctl daemon-reload
+	systemctl start docker
+	systemctl enable docker
+}
 
-echo '----------------------------------------'
+#清理工作
+function clean_temp() {
+	cd && rm -rf temp
+}
 
-#运行一个hello word
-docker run hello-world
\ No newline at end of file
+#测试运行
+function test_run() {
+	#运行一个hello word
+	docker run hello-world
+}
+
+install_docker
+set_storage
+install_systemd
+clean_temp
+test_run