kubernetes下的Nginx加Tomcat三部曲之二：细说开发

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
	xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
	<modelVersion>4.0.0</modelVersion>

	<groupId>com.bolingcavalry</groupId>
	<artifactId>k8stomcatdemo</artifactId>
	<version>0.0.1-SNAPSHOT</version>
	<packaging>jar</packaging>

	<name>k8stomcatdemo</name>
	<description>Demo project for Spring Boot</description>

	<parent>
		<groupId>org.springframework.boot</groupId>
		<artifactId>spring-boot-starter-parent</artifactId>
		<version>1.5.9.RELEASE</version>
		<relativePath/> <!-- lookup parent from repository -->
	</parent>

	<properties>
		<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
		<project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
		<java.version>1.8</java.version>
	</properties>

	<dependencies>
		<dependency>
			<groupId>org.springframework.boot</groupId>
			<artifactId>spring-boot-starter-web</artifactId>
		</dependency>

		<dependency>
			<groupId>org.springframework.boot</groupId>
			<artifactId>spring-boot-starter-test</artifactId>
			<scope>test</scope>
		</dependency>
	</dependencies>

	<build>
		<plugins>
			<plugin>
				<groupId>org.springframework.boot</groupId>
				<artifactId>spring-boot-maven-plugin</artifactId>
			</plugin>

			<!--新增的docker maven插件-->
			<plugin>
				<groupId>com.spotify</groupId>
				<artifactId>docker-maven-plugin</artifactId>
				<version>0.4.12</version>
				<!--docker镜像相关的配置信息-->
				<configuration>
					<!--镜像名，这里用工程名-->
					<imageName>bolingcavalry/${project.artifactId}</imageName>
					<!--TAG,这里用工程版本号-->
					<imageTags>
						<imageTag>${project.version}</imageTag>
					</imageTags>
					<!--镜像的FROM，使用java官方镜像-->
					<baseImage>java:8u111-jdk</baseImage>
					<!--该镜像的容器启动后，直接运行spring boot工程-->
					<entryPoint>["java", "-jar", "/${project.build.finalName}.jar"]</entryPoint>
					<!--构建镜像的配置信息-->
					<resources>
						<resource>
							<targetPath>/</targetPath>
							<directory>${project.build.directory}</directory>
							<include>${project.build.finalName}.jar</include>
						</resource>
					</resources>
				</configuration>
			</plugin>
		</plugins>
	</build>
</project>

@RestController
public class ServerInfo {

    @RequestMapping(value = "/getserverinfo", method = RequestMethod.GET)
    public String getUserInfoWithRequestParam(){
        return String.format("server : %s, time : %s", getIPAddr(), new SimpleDateFormat("yyyy-MM-dd HH:mm:ss").format(new Date()));
    }

    /**
     * 获取本机IP地址
     * @return
     */
    private static String getIPAddr(){
        String hostAddress = null;
        try{
            InetAddress address = InetAddress.getLocalHost();
            hostAddress = address.getHostAddress();
        }catch (UnknownHostException e){
            e.printStackTrace();
        }

        return hostAddress;
    }
}

root@maven:/usr/local/work/github/blog_demos# docker images
REPOSITORY                                              TAG                 IMAGE ID            CREATED             SIZE
bolingcavalry/k8stomcatdemo                             latest              1d41d9980a0b        43 hours ago        658 MB
bolingcavalry/k8stomcatdemo                             0.0.1-SNAPSHOT      c91bc368a729        46 hours ago        658 MB

apiVersion: extensions/v1beta1
kind: Deployment
metadata:
  name: tomcathost
spec:
  replicas: 3
  template:
    metadata:
     labels:
       name: tomcathost
    spec:
     containers:
     - name: tomcathost
       image: bolingcavalry/k8stomcatdemo:0.0.1-SNAPSHOT
       tty: true
       ports:
       - containerPort: 8080

apiVersion: v1
kind: Service
metadata:
  name: tomcathost
spec:
  type: ClusterIP
  ports:
       - port: 8080
  selector:
    name: tomcathost

user  nginx;
worker_processes  1;

error_log  /var/log/nginx/error.log warn;
pid        /var/run/nginx.pid;


events {
    worker_connections  1024;
}


http {
    include       /etc/nginx/mime.types;
    default_type  application/octet-stream;

    log_format  main  '$remote_addr - $remote_user [$time_local] "$request" '
                      '$status $body_bytes_sent "$http_referer" '
                      '"$http_user_agent" "$http_x_forwarded_for"';

    access_log  /var/log/nginx/access.log  main;

    sendfile        on;
    #tcp_nopush     on;

    keepalive_timeout  65;

    #gzip  on;

    #include /etc/nginx/conf.d/*.conf;

    upstream tomcat_client {
         server tomcathost:8080;
    } 

    server {
        server_name "";
        listen 80 default_server;
        listen [::]:80 default_server ipv6only=on;

        location / {
            proxy_pass http://tomcat_client;
            proxy_redirect default;
            proxy_set_header Host $host;
            proxy_set_header X-Real-IP $remote_addr;
        }
    }
}

# First docker file from bolingcavalry
# VERSION 0.0.1
# Author: bolingcavalry

#基础镜像
FROM nginx:stable

#作者
MAINTAINER BolingCavalry <zq2599@gmail.com>

#定义工作目录
ENV WORK_PATH /etc/nginx

#定义conf文件名
ENV CONF_FILE_NAME nginx.conf

#删除原有配置文件
RUN rm $WORK_PATH/$CONF_FILE_NAME

#复制新的配置文件
COPY ./$CONF_FILE_NAME $WORK_PATH/

#给shell文件赋读权限
RUN chmod a+r $WORK_PATH/$CONF_FILE_NAME

root@maven:/usr/local/work/nginx# docker build -t bolingcavalry/nginx-with-tomcat-host:0.0.1 .
Sending build context to Docker daemon 14.51 MB
Step 1/7 : FROM nginx:stable
 ---> dfe062ee1dc8
Step 2/7 : MAINTAINER BolingCavalry <zq2599@gmail.com>
 ---> Using cache
 ---> 93f4bf154c55
Step 3/7 : ENV WORK_PATH /etc/nginx
 ---> Using cache
 ---> d0158757fc9c
Step 4/7 : ENV CONF_FILE_NAME nginx.conf
 ---> Using cache
 ---> 7a18a8b417d6
Step 5/7 : RUN rm $WORK_PATH/$CONF_FILE_NAME
 ---> Using cache
 ---> f6f27d25539d
Step 6/7 : COPY ./$CONF_FILE_NAME $WORK_PATH/
 ---> Using cache
 ---> 33075a2b0379
Step 7/7 : RUN chmod a+r $WORK_PATH/$CONF_FILE_NAME
 ---> Using cache
 ---> 58ce530e160b
Successfully built 58ce530e160b

apiVersion: extensions/v1beta1
kind: Deployment
metadata:
  name: ng
spec:
  replicas: 1
  template:
    metadata:
     labels:
      name: ng
    spec:
     containers:
     - name: ng
       image: bolingcavalry/nginx-with-tomcat-host:0.0.1
       ports:
       - containerPort: 80

apiVersion: v1
kind: Service
metadata:
  name: ng
spec:
  type: NodePort
  ports:
       - port: 80
         nodePort: 30006
  selector:
    name: ng

kubectl create -f tomcat.yaml
kubectl create -f tomcat-svc.yaml
kubectl create -f nginx.yaml
kubectl create -f nginx-svc.yaml
echo ""
echo "nginx and tomcat running now"

kubectl delete service tomcathost
kubectl delete deployment tomcathost
kubectl delete service ng
kubectl delete deployment ng
echo "nginx and tomcat stop now"