测试3-CFANZ编程社区

前端访问后端时，关闭后端接口，通过nginx转发
编写后端

# 控制层
@RestController
@RequestMapping("/user")
public class TestController {
    @GetMapping("/test")
    public String test(){
        return "test success";
    }
}

# yml
server:
  port: 8080

部署后端，测试（未关闭8080端口，直接访问后端接口）

测试3_docker

编写前端

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>
<body>
    <a href="http://124.222.5.107:8080/user/test">直接访问</a><br>
    <a href="http://124.222.5.107:8005/user/test">请求转发</a>
</body>
</html>

测试3_ipad_02

配置nginx

测试3_docker_03

重启nginx，测试

测试3_nginx_04

未关闭8080端口，直接访问

测试3_Nginx_05

未关闭8080端口，请求转发

测试3_Nginx_06

关闭8080端口，请求转发

测试3_docker_07

将后端项目打成镜像，在后端jar包所在目录编写Dockerfile

测试3_ipad_08

# 因为项目使用的java11
FROM chniny/java:11.0.12
VOLUME /tmp
# jar包名称
ADD app.jar /app.jar
RUN sh -c 'touch /app.jar'
ENV JAVA_OPTS=""
ENTRYPOINT [ "sh", "-c", "java $JAVA_OPTS -Djava.security.egd=file:/dev/./urandom -jar /app.jar" ]

构建并启动

# 构建
docker build -t chniny/demo:4.0 .

# 启动容器
docker run -dit --restart=always --name demo -p 8080:8080 chniny/demo:4.0

# 不停止容器退出前台
ctrl + p + q

云服务器先放开8080端口，测试

测试3_nginx_09

使用内网

# 服务器创建网络
docker network create -d bridge my-bridge

# 将nginx添加到网络
docker network connect my-bridge nginx

# 将后端镜像添加到网络
docker network connect my-bridge demo

# 注意
# 如果使用如下方式启动后端镜像
docker run -it --net=host --name demo -p 8080:8080 chniny/demo:4.0
# 添加到自定义的网络时会报错
Error response from daemon: container sharing network namespace with another container or host cannot be connected to any other network
# 需使用入下方式
docker run -dit --restart=always --name demo -p 8080:8080 chniny/demo:4.0

# 查看nginx的网络
[root@VM-12-15-centos jar]# docker inspect 7b85604f7502 | grep IPAddress
            "SecondaryIPAddresses": null,
            "IPAddress": "172.17.0.3",
                    "IPAddress": "172.17.0.3",
                    "IPAddress": "172.18.0.2",

# 查看后端镜像的网络
[root@VM-12-15-centos jar]# docker inspect 0c88ace83397 | grep IPAddress
            "SecondaryIPAddresses": null,
            "IPAddress": "172.17.0.4",
                    "IPAddress": "172.17.0.4",
                    "IPAddress": "172.18.0.3",

# 测试：后端ping nginx -> 成功
docker exec -it demo ping nginx

# 测试：nginx ping 后端-> 报错
docker exec -it nginx ping demo
OCI runtime exec failed: exec failed: container_linux.go:380: starting container process caused: exec: "ping": executable file not found in $PATH: unknown

# 清理此容器的网络占用(未使用)
docker network disconnect --force 网络模式 容器名称
docker network disconnect --force bridge nginx

前端index.html

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>
<body>
    <a href="http://124.222.5.107:8080/user/test">直接访问</a><br>
    <a href="http://124.222.5.107:8005/user/test">请求转发</a>
</body>
</html>

测试3_Nginx_10

配置nginx，并重启

测试3_ipad_11

云服务器关闭8080端口
直接访问

测试3_nginx_12

请求转发 -> 测试成功

测试3_docker_13