本次会尝试将上一篇 spring cloud 快速学习教程项目部署在Swarm集群中，如何搭建swarm集群请看Docker Swarm集成搭建
源码github分支master-swarm https://github.com/liangxiaobo/springbootcloud-all.git
1. swarm环境
基于Docker Swarm集成搭建的基础上，我的三台测试机
| IP | 角色 |
|---|---|
| 172.16.10.85 | manager |
| 172.16.10.86 | worker |
| 172.16.10.87 | worker |
我的自建Docker私库地址 172.16.10.192:5000
2. 优化springcloud项目
优化项目的配置文件注释掉显示真实IP，并给应用给加hostname，举例：
eureka:
instance:
leaseRenewalIntervalInSeconds: 10
health-check-url-path: /actuator/health
# prefer-ip-address: true
hostname: service-user
注释的目的是让hostname和swarm service的name相同，这然在容器内部就可以使用http://hostname:port访问了，因为swarm内置的DNS使用servicename就可以访问
2.1 打包项目镜像
从github上下载分支 master-swarm
git clone -b master-swarm https://github.com/liangxiaobo/springbootcloud-all.git
如果你有自己的私库请将根目录的pom.xml中的 docker.image.prefix 改为自己的或公共库地址
如果不上传镜像的话，在创建service时会报找不到镜像的错误异常
打包docker镜像命令可以在项目根目录执行:
sh mvn-package-docker.sh
也可以手动在需要的项目下执行：
mvn package docker:build -Dmaven.test.skip=true
2.2 上传镜像到私有库中
查看打包出来的镜像：
[root@swarm-m service-user]# docker images
REPOSITORY TAG IMAGE ID CREATED SIZE
172.16.10.192:5000/service-user latest 1454fd81bb0c 42 minutes ago 692MB
172.16.10.192:5000/spring-boot-admin-server latest 7b650dd6b8e9 12 hours ago 697MB
172.16.10.192:5000/swagger-doc latest 03461f85d700 14 hours ago 689MB
172.16.10.192:5000/client-turbine-monitor latest a13d83c7ae8a 14 hours ago 692MB
172.16.10.192:5000/client-gateway-zuul latest 379566b57536 14 hours ago 694MB
172.16.10.192:5000/client-order-ribbon latest e352da8519ec 14 hours ago 694MB
172.16.10.192:5000/client-feign latest 5f8a2769bf61 14 hours ago 694MB
172.16.10.192:5000/service-order latest aacca65e148b 14 hours ago 692MB
172.16.10.192:5000/eureka-server latest dfc6e58fadf4 14 hours ago 691MB
上传镜像需要先登录到私库：
docker login -u 用户名 -p 密码 172.16.10.192:5000<私库的IP:PORT>
其它节点要也登录到私库服务器
登出的话:
docker logout 172.16.10.192:5000<私库的IP:PORT>
执行上传命令:
docker push 172.16.10.192:5000/eureka-server
# docker push <IP:PORT/镜像名>
查看上传的镜像：
WX20181017-113641@2x.png
3. 创建swarm service
这里特别说明一下，如果是在私有库上拉镜像需要在 docker service create 上加 --with-registry-auth，否则会报错，下会演示：
[root@swarm-m service-user]# docker service create --name service-user3 --replicas 3 --network my-overlay-network --publish 8863:8763 -e "SPRING_PROFILES_ACTIVE=test" 172.16.10.192:5000/service-user
image 172.16.10.192:5000/service-user:latest could not be accessed on a registry to record
its digest. Each node will access 172.16.10.192:5000/service-user:latest independently,
possibly leading to different nodes running different
versions of the image.
0rslh6ebjm0xpf9dbw6z6ou1b
overall progress: 1 out of 3 tasks
1/3: No such image: 172.16.10.192:5000/service-user:latest
2/3: No such image: 172.16.10.192:5000/service-user:latest
3/3: running [==================================================>]
^COperation continuing in background.
为会么要加 --with-registry-auth 官网上有解释：
https://docs.docker.com/engine/reference/commandline/service_create/#create-a-service
WX20181017-115328@2x.png
大概是说：这能将登录令牌从本地客户端传递到部署服务的swarm节点，从而是节点能登陆到私有注册表拉取镜像
3.2. 执行docker service create
这是要创建服务的命令：
--network my-overlay-network 是自定义网络
docker service create --name zipkin-service --replicas 2 --network my-overlay-network --publish 9411:9411 openzipkin/zipkin
docker service create --with-registry-auth --name eureka-server --replicas 2 --network my-overlay-network --publish 8761:8761 -e "SPRING_PROFILES_ACTIVE=test-peer1" 172.16.10.192:5000/eureka-server
docker service create --with-registry-auth --name service-user --replicas 2 --network my-overlay-network --publish 8763:8763 -e "SPRING_PROFILES_ACTIVE=test" 172.16.10.192:5000/service-user
docker service create --with-registry-auth --name service-order --replicas 2 --network my-overlay-network --publish 8764:8764 -e "SPRING_PROFILES_ACTIVE=test" 172.16.10.192:5000/service-order
docker service create --with-registry-auth --name spring-boot-admin-server --replicas 1 --network my-overlay-network --publish 8773:8773 -e "SPRING_PROFILES_ACTIVE=test" 172.16.10.192:5000/spring-boot-admin-server
docker service create --with-registry-auth --name client-order-ribbon --replicas 2 --network my-overlay-network --publish 8766:8766 -e "SPRING_PROFILES_ACTIVE=test" 172.16.10.192:5000/client-order-ribbon
docker service create --with-registry-auth --name client-feign --replicas 2 --network my-overlay-network --publish 8765:8765 -e "SPRING_PROFILES_ACTIVE=test" 172.16.10.192:5000/client-feign
docker service create --with-registry-auth --name client-gateway-zuul --replicas 2 --network my-overlay-network --publish 8771:8771 -e "SPRING_PROFILES_ACTIVE=test" 172.16.10.192:5000/client-gateway-zuul
docker service create --with-registry-auth --name client-turbine-monitor --replicas 2 --network my-overlay-network --publish 8767:8767 -e "SPRING_PROFILES_ACTIVE=test" 172.16.10.192:5000/client-turbine-monitor
服务创建完可以查看
[root@swarm-m /]# docker service ls
ID NAME MODE REPLICAS IMAGE PORTS
lbwpqv24hw9b client-feign replicated 2/2 172.16.10.192:5000/client-feign:latest *:8765->8765/tcp
vwtnddgl94ck client-gateway-zuul replicated 2/2 172.16.10.192:5000/client-gateway-zuul:latest *:8771->8771/tcp
14vmm45dtnl9 client-order-ribbon replicated 2/2 172.16.10.192:5000/client-order-ribbon:latest *:8766->8766/tcp
y8twu0mclhia client-turbine-monitor replicated 2/2 172.16.10.192:5000/client-turbine-monitor:latest *:8767->8767/tcp
p0sy1vwrvq6f eureka-server replicated 2/2 172.16.10.192:5000/eureka-server:latest *:8761->8761/tcp
zqlpb42ipqhu service-order replicated 2/2 172.16.10.192:5000/service-order:latest *:8764->8764/tcp
kh89t4hpgr70 service-user replicated 2/2 172.16.10.192:5000/service-user:latest *:8763->8763/tcp
0rslh6ebjm0x service-user3 replicated 3/3 172.16.10.192:5000/service-user:latest *:8863->8763/tcp
25ji5lwx66cq spring-boot-admin-server replicated 1/1 172.16.10.192:5000/spring-boot-admin-server:latest *:8773->8773/tcp
iptkiejwkuyu zipkin-service replicated 2/2 openzipkin/zipkin:latest *:9411->9411/tcp
WX20181017-142759@2x.png
访问 http://172.16.10.85:8773 并用admin登录
WX20181017-142956@2x.png
4. 使用stack发布服务
编写docker-compose.yml
version: '3'
services:
zipkin-service:
image: openzipkin/zipkin:latest
deploy:
mode: replicated
replicas: 2
restart_policy:
condition: on-failure
ports:
- "9411:9411"
networks:
my-overlay-network:
aliases:
- zipkin-service
eureka-server:
image: 172.16.10.192:5000/eureka-server:latest
deploy:
mode: replicated
replicas: 2
restart_policy:
condition: on-failure
# placement:
# constraints: [node.role == worker]
ports:
- "8761:8761"
networks:
my-overlay-network:
aliases:
- eureka-server
environment:
- "SPRING_PROFILES_ACTIVE=test-peer1"
service-user:
image: 172.16.10.192:5000/service-user:latest
deploy:
mode: replicated
replicas: 2
restart_policy:
condition: on-failure
ports:
- "8763:8763"
networks:
my-overlay-network:
aliases:
- service-user
environment:
- "SPRING_PROFILES_ACTIVE=test"
service-order:
image: 172.16.10.192:5000/service-order:latest
deploy:
mode: replicated
replicas: 2
restart_policy:
condition: on-failure
ports:
- "8764:8764"
networks:
my-overlay-network:
aliases:
- service-order
environment:
- "SPRING_PROFILES_ACTIVE=test"
client-order-ribbon:
image: 172.16.10.192:5000/client-order-ribbon:latest
deploy:
mode: replicated
replicas: 2
restart_policy:
condition: on-failure
ports:
- "8766:8766"
networks:
my-overlay-network:
aliases:
- client-order-ribbon
environment:
- "SPRING_PROFILES_ACTIVE=test"
client-feign:
image: 172.16.10.192:5000/client-feign:latest
deploy:
mode: replicated
replicas: 2
restart_policy:
condition: on-failure
ports:
- "8765:8765"
networks:
my-overlay-network:
aliases:
- client-feign
environment:
- "SPRING_PROFILES_ACTIVE=test"
client-gateway-zuul:
image: 172.16.10.192:5000/client-gateway-zuul:latest
deploy:
mode: replicated
replicas: 2
restart_policy:
condition: on-failure
ports:
- "8771:8771"
networks:
my-overlay-network:
aliases:
- client-gateway-zuul
environment:
- "SPRING_PROFILES_ACTIVE=test"
client-turbine-monitor:
image: 172.16.10.192:5000/client-turbine-monitor:latest
deploy:
mode: replicated
replicas: 2
restart_policy:
condition: on-failure
ports:
- "8767:8767"
networks:
my-overlay-network:
aliases:
- client-turbine-monitor
environment:
- "SPRING_PROFILES_ACTIVE=test"
spring-boot-admin-server:
image: 172.16.10.192:5000/spring-boot-admin-server:latest
deploy:
mode: replicated
replicas: 1
restart_policy:
condition: on-failure
ports:
- "8773:8773"
networks:
my-overlay-network:
aliases:
- spring-boot-admin-server
environment:
- "SPRING_PROFILES_ACTIVE=test"
visualizer:
image: dockersamples/visualizer:stable
ports:
- "8080:8080"
volumes:
- "/var/run/docker.sock:/var/run/docker.sock"
deploy:
placement:
constraints: [node.role == manager]
networks:
- my-overlay-network
networks:
my-overlay-network:
driver: overlay
配置中配置的自定义网络
networks:
my-overlay-network:
driver: overlay
还可以在网络中配置别名
networks:
my-overlay-network:
aliases:
- spring-boot-admin-server
执行命令:
如果是私有库必须加上 --with-registry-auth 否则镜像下载不了
docker stack deploy -c docker-compose.yml --with-registry-auth app
公共库可以使用:
docker stack deploy -c docker-compose.yml app
查看
[root@swarm-m /]# docker stack ls
NAME SERVICES ORCHESTRATOR
app 10 Swarm
[root@swarm-m /]# docker service ls
ID NAME MODE REPLICAS IMAGE PORTS
0f4hpqx7u5p3 app_client-feign replicated 2/2 172.16.10.192:5000/client-feign:latest *:8765->8765/tcp
ju5rg4l5x0ir app_client-gateway-zuul replicated 2/2 172.16.10.192:5000/client-gateway-zuul:latest *:8771->8771/tcp
i1t6wbyd2si6 app_client-order-ribbon replicated 2/2 172.16.10.192:5000/client-order-ribbon:latest *:8766->8766/tcp
rkld2rq7ntw5 app_client-turbine-monitor replicated 2/2 172.16.10.192:5000/client-turbine-monitor:latest *:8767->8767/tcp
j1s5yy1lkw9f app_eureka-server replicated 2/2 172.16.10.192:5000/eureka-server:latest *:8761->8761/tcp
u38tk0j0ez4l app_service-order replicated 2/2 172.16.10.192:5000/service-order:latest *:8764->8764/tcp
sv6h294y9r60 app_service-user replicated 2/2 172.16.10.192:5000/service-user:latest *:8763->8763/tcp
ybu18hzo4ra6 app_spring-boot-admin-server replicated 1/1 172.16.10.192:5000/spring-boot-admin-server:latest *:8773->8773/tcp
2m48cqlcip6v app_visualizer replicated 1/1 dockersamples/visualizer:stable *:8080->8080/tcp
692kwr04oa5u app_zipkin-service replicated 2/2 openzipkin/zipkin:latest *:9411->9411/tcp
WX20181018-093328@2x.png
WX20181017-180634@2x.png
WX20181017-180615@2x.png
