diff --git a/Dockerfile b/Dockerfile
new file mode 100644
index 0000000..256608e
--- /dev/null
+++ b/Dockerfile
@@ -0,0 +1,18 @@
+FROM harbor.ks.easyj.top/zt/alpine:0.1
+
+ENV APP_DIR=/app \
+	DOMAIN=myschools.me \
+	RR=PI1 \
+	AL_REGIONID=cn-hangzhou \
+  AL_ACCESSKEYID=LTAI5tJV828nqSqGpkouh1FD \
+	AL_ACCESSSECRET=aiMEp37bHLOjtoJFTDTfpq1o37cGtA
+
+COPY ddns6 ${APP_DIR}/ddns6
+
+WORKDIR ${APP_DIR}
+
+RUN  chmod +x ddns6
+
+EXPOSE 8080
+
+CMD ["./ddns6"]
\ No newline at end of file
diff --git a/main.go b/main.go
index 870995e..e81a8d9 100644
--- a/main.go
+++ b/main.go
@@ -4,15 +4,24 @@ import (
 	"fmt"
 	"log"
 	"net"
+	"os"
+	"strings"
 	"time"
 
 	"github.com/aliyun/alibaba-cloud-sdk-go/services/alidns"
 )
 
 func main() {
+	domain := os.Getenv("DOMAIN")
+	rr := os.Getenv("RR")
+	regionID := os.Getenv("AL_REGIONID")
+	accessKeyID := os.Getenv("AL_ACCESSKEYID")
+	accessSecret := os.Getenv("AL_ACCESSSECRET")
+
+	fullDNS := fmt.Sprintf("%s.%s", rr, domain)
 
 	for {
-		time.Sleep(time.Minute)
+		time.Sleep(time.Second)
 
 		addrs, err := net.InterfaceAddrs()
 		if err != nil {
@@ -37,25 +46,46 @@ func main() {
 			continue
 		}
 
-		client, err := alidns.NewClientWithAccessKey("cn-hangzhou", "<accessKeyId>", "<accessSecret>")
+		//查询域名对应的IP是否相同，相同时跳过。
+		ns, err := net.LookupHost(fullDNS)
+		if err != nil {
+			log.Println(err.Error())
+
+			if !strings.Contains(err.Error(), "no such host") {
+				continue
+			}
+		}
+
+		found := false
+		for _, n := range ns {
+			if n == ip6 {
+				found = true
+				continue
+			}
+		}
+		if found {
+			continue
+		}
+
+		client, err := alidns.NewClientWithAccessKey(regionID, accessKeyID, accessSecret)
 		if err != nil {
 			log.Println(err.Error())
 			continue
 		}
 
-		//查询域名对应的IP是否相同，相同时跳过。
-
 		//修改域名对应的IP，修改成功后continue
 		req := alidns.CreateUpdateDomainRecordRequest()
 		req.Scheme = "https"
-		req.RR = "pi1"
+		req.RR = rr
 		req.Value = ip6
 		req.Type = "AAAA"
-		req.Domain = "myschools.me"
+		req.Domain = domain
 		resp, err := client.UpdateDomainRecord(req)
 		if err != nil {
 			log.Println(err.Error())
-			continue
+			if !strings.Contains(err.Error(), "not wodeschool.com") {
+				continue
+			}
 		}
 
 		if resp.IsSuccess() {
@@ -67,12 +97,14 @@ func main() {
 		request.Scheme = "https"
 		request.Value = ip6
 		request.Type = "AAAA"
-		request.RR = "pi1"
-		request.DomainName = "dns-example.com"
+		request.RR = rr
+		request.DomainName = domain
 		response, err := client.AddDomainRecord(request)
 		if err != nil {
 			fmt.Print(err.Error())
 		}
-		fmt.Printf("response is %#v\n", response)
+		if !response.IsSuccess() {
+			fmt.Print(response.GetHttpContentString())
+		}
 	}
 }
diff --git a/readme.md b/readme.md
index 2c83236..67e2477 100644
--- a/readme.md
+++ b/readme.md
@@ -1,10 +1,31 @@
-DDNS6
+# DDNS6
+
+---
+
 
 一、概述
 
-把当前主机的IPV6向阿里DNS进行注册，实现IPV6 DDNS功能。
+    把当前主机的IPV6向阿里DNS进行注册，实现IPV6 DDNS功能。
 
 二、组件
 
     github.com/alibabacloud-go/domain-20180208 v0.0.2
-    github.com/alibabacloud-go/alidns-20150109/v4 v4.0.10 
\ No newline at end of file
+    github.com/alibabacloud-go/alidns-20150109/v4 v4.0.10 
+
+三、配置
+
+    1. 阿里云配置RAM访问控制，权限如下: 
+   
+        AliyunDNSFullAccess
+        AliyunHTTPDNSFullAccess
+
+    2. 环境变量
+        DOMAIN 域名
+	    RR 二级域名
+	    AL_REGIONID 地域，默认cn-hangzhou
+        AL_ACCESSKEYID 访问key
+	    AL_ACCESSSECRET 访问私钥
+
+四、 调试
+
+    DOMAIN=myschools.me RR=pi1 go run .
\ No newline at end of file