aims

1, Docker network configuration

2, Docker deployment SpringCloud project

Docker Network Configuration

Docker network model introduced

Docker There are four network mode when creating a container: bridge / host / container / none, bridge do not need to be specified as the default --net, the other three models use --net need to specify when you create the container

1.bridge mode (the default mode)

When using run docker --net = bridge, this model will be assigned a unique Network Namespace for each container,

All the same container on the host will be in the same network, they can communicate with each other

Note 1: bridge is the default mode, no parameter to specify --net, but invalid parameters used --net

Note 2: bridge mode can not be specified container IP (but not absolute

Docker run -it --name mytomcat01 -p 8081: 8080 Mirror ID

Docker run -it --name mytomcat01 -p 8082: 8080 Mirror ID

2.host mode

When using the docker run --net = host, the container will not be virtual IP / port, but the use of host IP and port

docker run -it --name mytomcat03 --net=host [镜像id]

Note 1: host mode can not use the port mapping and custom routing rules, which are consistent with the host, -p parameter is invalid and -icc

Several more were not across hosts, that container are running on a single host, but the actual production environment can not only be run with a single.

We will certainly use more than one, how much container between communicating hosts

1. Using a routing mechanism to get through the network

2. Open vSwitch (OVS) open network

3. Use flannel to open up network

4. Use the Quagga routing to automatically learn

Note 1: For details, see

https://www.cnblogs.com/yy-cxd/p/6553624.html

外部访问docker容器

1.bridge模式

docker run -itd -p 7101:7101 镜像ID

## -p参数可以出现多次，绑定多个端口号

docker run -itd -p 8080:8080 -p 8088:8088 镜像ID

实例：

docker run -it --name mytomcat02 -p 8081:8080 882487b8be1d

http://192.168.238.129:8081/

2.host模式

docker run -itd --net=host 镜像ID

实例：

docker run -itd --net=host 882487b8be1d

http://192.168.238.129:8080/

注1：不需要添加-p参数，因为它使用的就是主机的IP和端口，添加-p参数后，反而会出现以下警告：

WARNING: Published ports are discarded when using host network mode

注2：宿主机的ip路由转发功能一定要打开，否则所创建的容器无法联网！

echo 1 > /proc/sys/net/ipv4/ip_forward

3.相关命令

#停止并删除所有容器

docker stop $(docker ps -aq) && docker rm $(docker ps -aq)

4.网桥查看工具bridge-utils

apt install bridge-utils

brctl show

Docker部署SpringCloud项目

先确保工程能够正常访问

http://eureka2001.yuan.com:2001/

http://localhost/student/list

http://localhost:1003/student/list

以这五个部署为例

idea中springcloud项目打jar包

1.在idea运行springcloud项目，不报错，均可正常访问

2.修改主模块的pom

<version>0.0.1-SNAPSHOT</version>

<!--

-->

3.在各个子module模块的pom.xml文件中添加插件依赖

 1 <build>
 2         <plugins>
 3             <!--添加maven插件-->
 4             <plugin>
 5                 <groupId>org.springframework.boot</groupId>
 6                 <artifactId>spring-boot-maven-plugin</artifactId>
 7                 <configuration>
 8                     <!--添加自己的启动类路径！-->
 9                <mainClass>com.yuan.microservicestudentproviderhystrix.MicroserviceStudentProviderHystrixApplication</mainClass>
10                 </configuration>
11                 <executions>
12                     <execution>
13                         <goals>
14                             <!--可以把依赖的包都打包到生成的Jar包中-->
15                             <goal>repackage</goal>
16                         </goals>
17                     </execution>
18                 </executions>
19             </plugin>
20         </plugins>
21      </build>

4.点击idea的view ——》Tool windows ——》maven projects

先双击clean（去掉之前打的包target文件夹）——》再创建install

5.将项目各子模块target目录下的jar包，复制到指定目录，例如：d:\temp\apps目录下，再通过java命令直接运行

cmd

cd d:\temp\apps

java -jar *.jar --spring.profiles.active=xxx

例如：

1 java -jar microservice-eureka-server.jar --spring.profiles.active=eureka2001
2 java -jar microservice-eureka-server.jar --spring.profiles.active=eureka2002
3 java -jar microservice-student-provider-hystrix.jar --spring.profiles.active=provider-hystrix-1005
4 java -jar microservice-student-provider-hystrix.jar --spring.profiles.active=provider-hystrix-1006
5 java -jar microservice-student-consumer-feign-80.jar