Dockerfile 构建jar 镜像docker Dockerfile jar 包docker-compose
docker 的好处⾃不必多说，启动迅速，占⽤资源少，⽅便管理。把jar 包build 构建成docker 镜像，再结合docker-compose 管理docker 容器的启动，简直是开发Spring cloud 项⽬的最佳助⼿！
使⽤CentOS7
1.安装稳定版docker compose:
sudo curl -L "github/docker/compose/releases/download/1.25.0/docker-compose-$(uname -s)-$(uname -m)" -o /usr/local/bin/docker-compose
2.⽂件授权
sudo chmod +x /usr/local/bin/docker-compose
3.查看是否安装成功
$ docker-compose --version
docker-compose version 1.25.0, build 1110ad01
⾃⾏准备⼀个可运⾏的jar 包即可，测试使⽤的是⼀个eureka 注册中⼼的项⽬jar 包。步骤：
1.创建springboot 项⽬
2.添加eureka 依赖
3.添加
application 配置
⼀、安装
docker 和compose
⼆、准备jar 包
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-starter-netflix-eureka-server</artifactId>
</dependency>
spring:
application:
name: eureka-server
server:
port: 8761
eureka:
client:
registerWithEureka: false
fetchRegistry: false
测试jar 包
Dockerfile: 构建docker 镜像配置
1. Dockerfile
FROM: 基础镜像，通过jdk8镜像开始
MAINTAINER: 维护者
ADD: 复制jar 包到镜像内，名字为app.jar
EXPOSE: 声明端⼝
ENTRYPOINT: docker 启动时，运⾏的命令.这⾥就是容器运⾏就启动jar 服务
进⼊Dockerfile 的同级⽬录，指定镜像构建:
docker build -t lin/eureka .
最后的点不要漏掉,lin/eureka 是给镜像起的名字
查看镜像: docker image ls
2. l
serviceUrl:
defaultZone: ${eureka.instance.hostname}:${server.port}/eureka/
三、编写配置⽂件⽬录结构
springframework jar包下载
FROM java:8
MAINTAINER lin
ADD eurake-0.0.1-SNAPSHOT.jar app.jar
EXPOSE 8761
ENTRYPOINT ["java","-jar","app.jar"]REPOSITORY          TAG                IMAGE ID            CREATED            SIZE
lin/eureka          latest              f45c58780812        4 hours ago        691MB
redis              latest              dcf9ec9265e0        3 weeks ago        98.2MB java                8                  d23bdf5b1b1b        2 years ago        643MB
version: '3'
services:
eureka:
image: lin/eureka
container_name: lin-eureka
services: 指定容器服务，下⾯可配多个服务
eureka: 服务名字,⾃⼰指定.这⾥就代表我的eureka 服务
image: 指定启动的镜像，就是上边通过Dockerfile 构建的镜像
container_name: 给容器起⼀个名字
restart: 可重启，使⽤always 就好
ports: 声明映射端⼝检查配置是否正确
docker-compose config 启动容器服务
docker-compose up 停⽌并删除容器服务
docker-compose down 强制启动重新建⽴容器
docker-compose up -d --force-recreate
3. 查看服务
查看进程: docker ps
查看⽇志: docker logs lin-eureka
docker-compose 配置，除了使⽤image 指定镜像之外，还可以使⽤build 把构建镜像和启动容器放在⼀起执⾏.
restart: always
ports:
- 8761:8761CONTAINER ID        IMAGE              COMMAND                  CREATED            STATUS              PORTS                    NAMES
f21fdb5bb57c        lin/eureka          "java -jar app.jar"      4 hours ago        Up 4 hours          0.0.0.0:8761->8761/tcp  lin-eureka
2019-12-16 17:18:17.104  INFO 1 --- [          main] trationDelegate$BeanPostProcessorChecker : Bean 'org.springframework.cloud.autoconfigure.Confi gurationPropertiesRebinderAutoConfiguration' of type [org.springframework.cloud.autoconfigure.ConfigurationPropertiesRebinderAutoConfiguration] is not eligible for getting processed by all BeanPostProcessors (for example: not eligible for auto-proxying)
.  ____          _            __ _ _
/\\ / ___'_ __ _ _(_)_ __  __ _ \ \ \ \
( ( )\___ | '_ | '_| | '_ \/ _` | \ \ \ \
\\/  ___)| |_)| | | | | || (_| |  ) ) ) )
'  |____| .__|_| |_|_| |_\__, | / / / /
=========|_|==============|___/=/_/_/_/
:: Spring Boot ::        (v2.2.2.RELEASE)
2019-12-16 17:18:17.482  INFO 1 --- [          main] com.lyf.eurake.EurakeApplication        : No active profile set, falling back to default profiles: default 2019-12-16 17:18:19.690  WARN 1 --- [          main] o.s.dpoint.EndpointId    : Endpoint ID 'service-registry' contains invalid characters, please migrate to a valid format.
2019-12-16 17:18:20.315  INFO 1 --- [          main] o.t.scope.GenericScope    : BeanFactory id=6ff43722-b2c2-392e-b72c-6151fa54c3d d
2019-12-16 17:18:21.170  INFO 1 --- [          main] trationDelegate$BeanPostProcessorChecker : Bean 'org.springframework.cloud.autoconfigure.Confi
gurationPropertiesRebinderAutoConfiguration' of type [org.springframework.cloud.autoconfigure.ConfigurationPropertiesRebinderAutoConfiguration] is
四、补充docker-compose 配置
version: '3'
services:
eureka2:
build: ./eureka
image: lin-eureka:2
container_name: lin-eureka-2
restart: always
ports:
- 8762:8761
build: 指定构建⽬录，可以使⽤相对路径
image: 跟在build后⾯，指定构建镜像的名字
构建镜像并启动: docker-compose up -d
Creating network "work_default" with the default driver
Building eureka2
Step 1/5 : FROM java:8
-
--> d23bdf5b1b1b
Step 2/5 : MAINTAINER lin
---> Using cache
---> 79ef5083226e
Step 3/5 : ADD eurake-0.0.1-SNAPSHOT.jar app.jar
---> 7efd60a9f862
Step 4/5 : EXPOSE 8761
---> Running in 6968db6d10ad
Removing intermediate container 6968db6d10ad
---> a01061f73fe1
Step 5/5 : ENTRYPOINT ["java","-jar","app.jar"]
-
--> Running in 00c5dc7031e0
Removing intermediate container 00c5dc7031e0
---> 2ed328e41b1c
Successfully built 2ed328e41b1c
Successfully tagged lin-eureka:2
重新构建:
docker-compose build或者docker-compose up --build
查看镜像: docker image ls
REPOSITORY          TAG                IMAGE ID            CREATED            SIZE lin-eureka          2                  2ed328e41b1c        49 seconds ago      691MB

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