docker-compose下的java应用启动顺序两部曲之二：实战

                 本文链接：[https://blog.csdn.net/boling\_cavalry/article/details/102880881](https://blog.csdn.net/boling_cavalry/article/details/102880881) 

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
	xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
	<modelVersion>4.0.0</modelVersion>

	<groupId>com.bolingcavalry</groupId>
	<artifactId>eureka</artifactId>
	<version>0.0.1-SNAPSHOT</version>
	<packaging>jar</packaging>

	<name>eureka</name>
	<description>eureka</description>

	<parent>
		<groupId>com.bolingcavalry</groupId>
		<artifactId>wait-for-it-demo</artifactId>
		<version>0.0.1-SNAPSHOT</version>
		<relativePath>../pom.xml</relativePath> <!-- lookup parent from repository -->
	</parent>

	<properties>
		<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
		<project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
		<java.version>1.8</java.version>
		<spring-cloud.version>Finchley.RELEASE</spring-cloud.version>
	</properties>

	<dependencies>
		<dependency>
			<groupId>org.springframework.cloud</groupId>
			<artifactId>spring-cloud-starter-netflix-eureka-server</artifactId>
		</dependency>
	</dependencies>

	<build>
		<plugins>
			<plugin>
				<groupId>org.springframework.boot</groupId>
				<artifactId>spring-boot-maven-plugin</artifactId>
			</plugin>
			<!--使用jib插件-->
			<plugin>
				<groupId>com.google.cloud.tools</groupId>
				<artifactId>jib-maven-plugin</artifactId>
				<version>1.7.0</version>
				<configuration>
					<!--from节点用来设置镜像的基础镜像，相当于Docerkfile中的FROM关键字-->
					<from>
						<!--使用openjdk官方镜像，tag是8-jdk-stretch，表示镜像的操作系统是debian9,装好了jdk8-->
						<image>openjdk:8-jdk-stretch</image>
					</from>
					<to>
						<!--镜像名称和tag，使用了mvn内置变量${project.version}，表示当前工程的version-->
						<image>bolingcavalry/${project.artifactId}:${project.version}</image>
					</to>
					<!--容器相关的属性-->
					<container>
						<!--jvm内存参数-->
						<jvmFlags>
							<jvmFlag>-Xms1g</jvmFlag>
							<jvmFlag>-Xmx1g</jvmFlag>
						</jvmFlags>
						<!--要暴露的端口-->
						<ports>
							<port>8080</port>
						</ports>
						<useCurrentTimestamp>true</useCurrentTimestamp>
					</container>
				</configuration>
				<executions>
					<execution>
						<phase>compile</phase>
						<goals>
							<goal>dockerBuild</goal>
						</goals>
					</execution>
				</executions>
			</plugin>
		</plugins>
	</build>
</project>

spring:
  application:
    name: service

eureka:
  client:
    serviceUrl:
      defaultZone: http://eureka:8080/eureka/

FROM openjdk:8-jdk-stretch

ADD wait-for-it.sh /wait-for-it.sh
RUN sh -c 'chmod 777 /wait-for-it.sh'

<plugin>
				<groupId>com.google.cloud.tools</groupId>
				<artifactId>jib-maven-plugin</artifactId>
				<version>1.7.0</version>
				<configuration>
					<!--from节点用来设置镜像的基础镜像，相当于Docerkfile中的FROM关键字-->
					<from>
						<!--使用自制的基础镜像，里面有wait-for-it.sh脚本-->
						<image>bolingcavalry/jkd8-wait-for-it:0.0.2</image>
					</from>
					<to>
						<!--镜像名称和tag，使用了mvn内置变量${project.version}，表示当前工程的version-->
						<image>bolingcavalry/${project.artifactId}:${project.version}</image>
					</to>
					<!--容器相关的属性-->
					<container>
						<!--entrypoint的值等于INHERIT表示jib插件不构建启动命令了，此时要使用者自己控制，可以在启动时输入，或者写在基础镜像中-->
						<entrypoint>INHERIT</entrypoint>
						<!--要暴露的端口-->
						<ports>
							<port>8080</port>
						</ports>
						<useCurrentTimestamp>true</useCurrentTimestamp>
					</container>
				</configuration>
				<executions>
					<execution>
						<phase>compile</phase>
						<goals>
							<goal>dockerBuild</goal>
						</goals>
					</execution>
				</executions>
			</plugin>

version: '3'
services:
 eureka:
   image: bolingcavalry/eureka:0.0.1-SNAPSHOT
   container_name: eureka
   restart: unless-stopped
 service:
   image: bolingcavalry/service:0.0.1-SNAPSHOT
   container_name: service
   restart: unless-stopped
   command: sh -c './wait-for-it.sh eureka:8080 -t 0  -- java -Xms1g -Xmx1g -cp /app/resources:/app/classes:/app/libs/* com.bolingcavalry.waitforitdemo.ServiceApplication'
   depends_on:
   - eureka

sh -c './wait-for-it.sh eureka:8080 -t 0  -- java -Xms1g -Xmx1g -cp /app/resources:/app/classes:/app/libs/* com.bolingcavalry.waitforitdemo.ServiceApplication'

[root@maven ~]# docker exec eureka ps -ef
UID         PID   PPID  C STIME TTY          TIME CMD
root          1      0  2 07:04 ?        00:00:48 java -Xms1g -Xmx1g -cp /app/resources:/app/classes:/app/libs/* com.bolingcavalry.waitforitdemo.EurekaApplication
root         56      0  0 07:25 ?        00:00:00 /bin/bash
root         63      0  0 07:31 ?        00:00:00 ps -ef

[root@maven ~]# docker exec service ps -ef
UID         PID   PPID  C STIME TTY          TIME CMD
root          1      0  0 07:04 ?        00:00:00 sh -c ./wait-for-it.sh eureka:8080 -t 0  -- java -Xms1g -Xmx1g -cp /app/resources:/app/classes:/app/libs/* com.bolingcavalry.waitforitdemo.ServiceApplication
root          7      1  1 07:04 ?        00:00:32 java -Xms1g -Xmx1g -cp /app/resources:/app/classes:/app/libs/* com.bolingcavalry.waitforitdemo.ServiceApplication
root        107      0  0 07:33 ?        00:00:00 ps -ef