在本人的微服务系列中,已经演示了各个spring cloud 微服务组件的使用,以及相关的示例微服务应用。在每次启动微服务和对微服务进行扩容、缩容都不方便,本文使用docker-compose将以下的微服务容器化,并进行自动化部署。
1.微服务治理组件列表
2.微服务示例列表
3.环境与工具
环境 linux (ubuntu 16)
工具 docker+gitlab+rabbitmq+docker registry+intellij idea+maven
本文编写两个docker-compose.yml文件,将服务治理和服务示例分开,主要是因为服务示例依赖了服务治理,部分示例必须要等待服务治理组件加载完毕才能正常启动,比如hello项目使用了配置中心config server的配置,config server未加载完毕,hello项目启动异常。
虽然depends_on、links等具有启动顺序的问题,但解决不了启动是否 ready的问题.
在每个项目的根目录中,编写Dockerfile,文件内容为
FROM java:8-jre-alpine
RUN sed -i 's/dl-cdn.alpinelinux.org/mirrors.ustc.edu.cn/' /etc/apk/repositories
VOLUME /tmp
ADD target/*.jar app.jar
RUN sh -c 'touch /app.jar'
RUN echo $(date) > /image_built_at
ENTRYPOINT [java,-Djava.security.egd=file:/dev/./urandom,-jar,/app.jar,--spring.profiles.active=${SPRING_PROFILES_ACTIVE}]
其中SPRING_PROFILES_ACTIVE为后面docker-compose.yml传入的环境变量,指定项目以使用哪段配置启动。
主要是使用docker后,服务依赖的其他服务的连接发生改变,通过配置环境变量来动态接收docker-compose的配置参数。
track增加的spring.profiles:docker配置
---
spring:
profiles: docker
server:
port: ${{SERVER_PORT}:9411}
eureka:
client:
serviceUrl:
defaultZone: ${EUREKA_SERVER_LIST}
hello 增加的spring.profiles:docker配置
---
spring:
profiles: docker
datasource:
url: jdbc:mysql://mysql:3306/${{MYSQL_DATABASE}:hello}
username: ${{MYSQL_USERNAME}:user}
password: ${{MYSQL_PASSWORD}:passworld}
testWhileIdle: true
validationQuery: SELECT 1
jpa:
show-sql: false
hibernate:
ddl-auto: update
naming-strategy: org.hibernate.cfg.ImprovedNamingStrategy
properties:
hibernate:
dialect: org.hibernate.dialect.MySQL5Dialect
zipkin:
base-url: http://track:9411
eureka:
client:
serviceUrl:
defaultZone: ${EUREKA_SERVER_LIST}
${{MYSQL_USERNAME}:user} 是指配置文件在启动的时候如果没有读取到环境变量MYSQL_USERNAME的值,则使用默认值user。这种配置在开发的时候十分有用,比如切换开发、测试、生产环境配置。
该脚本将进入到各个项目中,使用maven对项目进行打包,然后使用docker,根据Dockerfile对项目进行构建,生成分别带有:lastest 和当前日期标签的两个镜像。
#!/bin/bash
# 编译所有的代码,生成docker 镜像
function progress(){
local GREEN CLEAN
GREEN='\033[0;32m'
CLEAN='\033[0m'
printf \n${GREEN}$@ ${CLEAN}\n >&2
}
set -e
# 镜像仓库前缀
REGPREFIX=127.0.0.1:5000/billjiang
TOTAL=10
#discovery server
progress Building discovery-server(1/${TOTAL}) jar file ...
cd common/discovery
mvn clean package -DskipTests
progress Building discovery(eureka server)(1/${TOTAL}) docker image ...
docker tag $(docker build -t ${REGPREFIX}/discovery -q .) ${REGPREFIX}/discovery:$(date -u +%Y%m%d-%H%M%S)
cd -
#config server
progress Building config-server(2/${TOTAL}) jar file ...
cd common/configserver
mvn clean package -DskipTests
progress Building config server(2/${TOTAL}) docker image ...
docker tag $(docker build -t ${REGPREFIX}/configserver -q .) ${REGPREFIX}/configserver:$(date -u +%Y%m%d-%H%M%S)
cd -
#gateway
progress Building gateway-zuul(3/${TOTAL}) jar file ...
cd common/gateway
mvn clean package -DskipTests
progress Building gateway-zuul(3/${TOTAL}) docker image ...
docker tag $(docker build -t ${REGPREFIX}/gateway -q .) ${REGPREFIX}/gateway:$(date -u +%Y%m%d-%H%M%S)
cd -
#track sleuth+zipkin
progress Building track(sleuth+zipkin)(4/${TOTAL}) jar file ...
cd common/track
mvn clean package -DskipTests
progress Building track by sleuth+zipkin(4/${TOTAL}) docker image ...
docker tag $(docker build -t ${REGPREFIX}/track -q .) ${REGPREFIX}/track:$(date -u +%Y%m%d-%H%M%S)
cd -
#hystrix-dashboard
progress Building hystrix-dashboard(5/${TOTAL}) jar file ...
cd common/hystrix-dashboard
mvn clean package -DskipTests
progress Building hystrix-dashboard(5/${TOTAL}) docker image ...
docker tag $(docker build -t ${REGPREFIX}/hystrix-dashboard -q .) ${REGPREFIX}/hystrix-dashboard:$(date -u +%Y%m%d-%H%M%S)
cd -
#hystrix-turbine-mq
progress Buildinhg hystrix-turbine-mq(6/${TOTAL}) jar file ...
cd common/hystrix-turbine-mq
mvn clean package -DskipTests
progress Building hystrix-turbine-mq(6/${TOTAL}) docker image ...
docker tag $(docker build -t ${REGPREFIX}/hystrix-turbine-mq -q .) ${REGPREFIX}/hystrix-turbine-mq:$(date -u +%Y%m%d-%H%M%S)
cd -
#hello
progress Buildinhg hello service(7/${TOTAL}) jar file ...
cd service/hello
mvn clean package -DskipTests
progress Building hello service(7/${TOTAL}) docker image ...
docker tag $(docker build -t ${REGPREFIX}/hello -q .) ${REGPREFIX}/hello:$(date -u +%Y%m%d-%H%M%S)
cd -
#world
progress Buildinhg world service(8/${TOTAL}) jar file ...
cd service/world
mvn clean package -DskipTests
progress Building world service(8/${TOTAL}) docker image ...
docker tag $(docker build -t ${REGPREFIX}/world -q .) ${REGPREFIX}/world:$(date -u +%Y%m%d-%H%M%S)
cd -
#helloworld
progress Buildinhg helloworld service(9/${TOTAL}) jar file ...
cd service/helloworld
mvn clean package -DskipTests
progress Building helloworld service(9/${TOTAL}) docker image ...
docker tag $(docker build -t ${REGPREFIX}/helloworld -q .) ${REGPREFIX}/helloworld:$(date -u +%Y%m%d-%H%M%S)
cd -
#helloworld-feign
progress Buildinhg helloworld-feign service(10/${TOTAL}) jar file ...
cd service/helloworld-feign
mvn clean package -DskipTests
progress Building helloworld-feign service(10/${TOTAL}) docker image ...
docker tag $(docker build -t ${REGPREFIX}/helloworld-feign -q .) ${REGPREFIX}/helloworld-feign:$(date -u +%Y%m%d-%H%M%S)
cd -
批量编译打包springcloud-demo.png
version: 2
services:
#启动注册中心eureka-server集群 集中管理/服务注册/服务发现
discovery1:
container_name: discovery1
image: 127.0.0.1:5000/billjiang/discovery
ports:
- 8761:8761
environment:
- ADDITIONAL_EUREKA_SERVER_LIST=http://discovery2:8762/eureka/
- SPRING_PROFILES_ACTIVE=docker
- SERVER_PORT=8761
discovery2:
container_name: discovery2
image: 127.0.0.1:5000/billjiang/discovery
ports:
- 8762:8762
environment:
- ADDITIONAL_EUREKA_SERVER_LIST=http://discovery1:8761/eureka/
- SPRING_PROFILES_ACTIVE=docker
- SERVER_PORT=8762
links:
- discovery1
#启动配置中心config-server集群 配置更新/配置集中管理/多环境配置
config1:
container_name: configserver1
image: 127.0.0.1:5000/billjiang/configserver
ports:
- 8090:8090
environment:
- EUREKA_SERVER_LIST=http://discovery1:8761/eureka/,http://discovery2:8762/eureka/
- SPRING_PROFILES_ACTIVE=docker
- SERVER_PORT=8090
links:
- discovery1
- discovery2
config2:
container_name: configserver2
image: 127.0.0.1:5000/billjiang/configserver
ports:
- 8091:8091
environment:
- EUREKA_SERVER_LIST=http://discovery1:8761/eureka/,http://discovery2:8762/eureka/
- SPRING_PROFILES_ACTIVE=docker
- SERVER_PORT=8091
links:
- discovery1
- discovery2
#启动网关gateway,可配置成集群,使用nginx进行负载 智能路由/安全控制/负载均衡
gateway:
container_name: gateway
image: 127.0.0.1:5000/billjiang/gateway
ports:
- 8086:8086
environment:
- EUREKA_SERVER_LIST=http://discovery1:8761/eureka/,http://discovery2:8762/eureka/
- SPRING_PROFILES_ACTIVE=docker
- SERVER_PORT=8086
links:
- discovery1
- discovery2
# 启动seluth+zipkin zipkin服务跟踪/依赖可视化
track:
container_name: track
image: 127.0.0.1:5000/billjiang/track
ports:
- 9411:9411
environment:
- EUREKA_SERVER_LIST=http://discovery1:8761/eureka/,http://discovery2:8762/eureka/
- SPRING_PROFILES_ACTIVE=docker
- SERVER_PORT=9411
links:
- discovery1
- discovery2
# hystrix
# 启动hystrix-dashboard
hystrix-dashboard:
container_name: hystrix-dashboard
image: 127.0.0.1:5000/billjiang/hystrix-dashboard
ports:
- 8087:8087
environment:
- EUREKA_SERVER_LIST=http://discovery1:8761/eureka/,http://discovery2:8762/eureka/
- SPRING_PROFILES_ACTIVE=docker
- SERVER_PORT=8087
links:
- discovery1
- discovery2
# 启动hystrix-turbine-mq 基于消息中间件的实时性能数据收集
hystrix-turbine-mq:
container_name: hystrix-turbine-mq
image: 127.0.0.1:5000/billjiang/hystrix-turbine-mq
ports:
- 8089:8089
environment:
- EUREKA_SERVER_LIST=http://discovery1:8761/eureka/,http://discovery2:8762/eureka/
- SPRING_PROFILES_ACTIVE=docker
- SERVER_PORT=8089
links:
- discovery1
- discovery2
mysql:
container_name: mysql
image: mysql:5.7
environment:
- MYSQL_ROOT_PASSWORD=passw0rd
- MYSQL_DATABASE=foodb
- MYSQL_USER=user1
- MYSQL_PASSWORD=passw0rd
在springcloud-demo根目录下,使用docker-compose up启动服务编排,如下界面所示:
服务治理服务编排启动1.png
启动后,打开注册中心地址,查看已经启动的服务:
已经启动的服务列表.png
配置中心使用到了gitlab, 服务跟踪track使用了rabbitmq,这两个容器都不在docker-compose之中,要使得能够互相连通,要把这两个容器也加入到springclouddemo_default网络。
docker network connect springclouddemo_default gitlab
docker network connect springclouddemo_default rabbitmq
使用docker network inspect springclouddemo_default可以查看到已经加入网络的容器。
进入到service目录,使用docker-compose up启动服务示例编排,如下所示:
服务示例编排1.png
服务示例编排2
新增注册服务.png
scale扩容.png
刷新Eureka Server,可以看到服务已经扩展到三个节点。
扩容后.png
作者:billJiang
链接:https://www.jianshu.com/p/05518d252186
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