编排高可用Spring Cloud微服务集群及动态伸缩

一 编排的微服务列表

二 修改所有微服务application.yml属性

由于使用了microservice-discovery-eureka-ha，需要将所有微服务eureka.client.service-url.defaultZone内容修改为如下：

eureka:
  client:
    service-url:
      defaultZone: http://peer1:8761/eureka/,http://peer2:8762/eureka/

三 将代码拷贝到Linux中

[root@master docker-3-complex]# ll
total 8
-rw-r--r-- 1 root root  756 Jul  8 15:06 docker-compose.yml
drwxr-xr-x 3 root root   30 Jul  8 15:06 microservice-consumer-movie-ribbon-hystrix
drwxr-xr-x 3 root root   30 Jul  8 15:06 microservice-discovery-eureka-ha
drwxr-xr-x 3 root root   30 Jul  8 15:06 microservice-gateway-zuul
drwxr-xr-x 3 root root   30 Jul  8 15:06 microservice-hystrix-turbine
drwxr-xr-x 3 root root   47 Jul  8 15:06 microservice-provider-user
-rw-r--r-- 1 root root 1512 Jul  8 15:06 pom.xml

四 在每个项目的根目录，执行以下命令构建Docker镜像

mvn clean package docker:build
[root@master microservice-provider-user]# docker images
REPOSITORY                                          TAG                 IMAGE ID            CREATED              SIZE
itmuch/microservice-provider-user                   0.0.1-SNAPSHOT      96712f0e00b4        39 seconds ago       693MB
itmuch/microservice-hystrix-turbine                 0.0.1-SNAPSHOT      026a20efaf28        44 seconds ago       683MB
itmuch/microservice-gateway-zuul                    0.0.1-SNAPSHOT      cdd3c39708f7        About a minute ago   682MB
itmuch/microservice-discovery-eureka-ha             0.0.1-SNAPSHOT      bd9d658fad50        2 minutes ago        685MB
itmuch/microservice-consumer-movie-ribbon-hystrix   0.0.1-SNAPSHOT      365b209ff0e0        3 minutes ago        682MB

五 编写docker-compose.yml

version: "2"
services:
  peer1:
    image: itmuch/microservice-discovery-eureka-ha:0.0.1-SNAPSHOT
    ports:
      - "8761:8761"
    environment:
      - spring.profiles.active=peer1
  peer2:
    image: itmuch/microservice-discovery-eureka-ha:0.0.1-SNAPSHOT
    hostname: peer2
    ports:
      - "8762:8762"
    environment:
      - spring.profiles.active=peer2
  microservice-provider-user:
    image: itmuch/microservice-provider-user:0.0.1-SNAPSHOT
  microservice-consumer-movie-ribbon-hystrix:
    image: itmuch/microservice-consumer-movie-ribbon-hystrix:0.0.1-SNAPSHOT
  microservice-gateway-zuul:
    image: itmuch/microservice-gateway-zuul:0.0.1-SNAPSHOT
  microservice-hystrix-turbine:
    image: itmuch/microservice-hystrix-turbine:0.0.1-SNAPSHOT

六 启动与测试

1 执行以下命令启动项目

[root@master microservice-provider-user]# docker-compose up

2 输入192.168.0.100:8761

3 执行以下命令，为各个微服务扩容

docker-compose scale microservice-provider-user=3  microservice-hystrix-turbine=3 microservice-gateway-zuul=3 microservice-consumer-movie-ribbon-hystrix=3

4 再次输入192.168.0.100:8761