docker微服务案例

建立简单的springboot项目(boot3)

1.建立module



2. 改pom

<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 https://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0modelVersion>
    <parent>
        <groupId>org.springframework.bootgroupId>
        <artifactId>spring-boot-starter-parentartifactId>
        <version>3.2.1version>
        <relativePath/> 
    parent>
    <groupId>com.examplegroupId>
    <artifactId>docker_bootartifactId>
    <version>0.0.1-SNAPSHOTversion>
    <name>docker_bootname>
    <description>docker_bootdescription>
    <properties>
        <junit.version>4.12junit.version>
        <log4j.version>1.2.17log4j.version>
        <lombok.version>1.16.18lombok.version>
        <mysql.version>5.1.47mysql.version>
        <druid.version>1.1.16druid.version>
        <mapper.version>4.1.5mapper.version>
        <java.version>17java.version>
    properties>
    <dependencies>
        
        <dependency>
            <groupId>org.springframework.bootgroupId>
            <artifactId>spring-boot-starter-webartifactId>
        dependency>
        <dependency>
            <groupId>org.springframework.bootgroupId>
            <artifactId>spring-boot-starter-actuatorartifactId>
        dependency>
        
        <dependency>
            <groupId>org.springframework.bootgroupId>
            <artifactId>spring-boot-starter-testartifactId>
            <scope>testscope>
        dependency>
        <dependency>
            <groupId>org.springframework.bootgroupId>
            <artifactId>spring-boot-starter-webartifactId>
        dependency>

        <dependency>
            <groupId>org.projectlombokgroupId>
            <artifactId>lombokartifactId>
            <optional>trueoptional>
        dependency>
        <dependency>
            <groupId>org.springframework.bootgroupId>
            <artifactId>spring-boot-starter-testartifactId>
            <scope>testscope>
        dependency>
    dependencies>


project>

3. 写yaml

server.port=6001

4.主启动类

package com.example.docker_boot;

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;

@SpringBootApplication
public class DockerBootApplication {

    public static void main(String[] args) {
        SpringApplication.run(DockerBootApplication.class, args);
    }

}

5.写服务

写了简单的一个显示服务:

package com.example.docker_boot.controller;

import org.springframework.beans.factory.annotation.Value;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.bind.annotation.RestController;

import java.util.UUID;


@RestController
public class OrderController
{
    @Value("${server.port}")
    private String port;

    @RequestMapping("/order/docker")
    public String helloDocker()
    {
        return "hello docker"+"\t"+port+"\t"+ UUID.randomUUID().toString();
    }

    @RequestMapping(value ="/order/index",method = RequestMethod.GET)
    public String index()
    {
        return "服务端口号: "+"\t"+port+"\t"+UUID.randomUUID().toString();
    }
}

boot2建立

我最近发现因为版本的迭代更新,官网和Spring Initializr 不能建立boot2了,所有项目必须自己手动建立
直接建立一个Maven 项目 然后在添加相关的文件和上述一样不过这些文件都需要你自己加进去

改pom

<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>4.0.0modelVersion>
    <parent>
        <groupId>org.springframework.bootgroupId>
        <artifactId>spring-boot-starter-parentartifactId>
        <version>2.5.6version>
        <relativePath/>
    parent>
    <groupId>org.examplegroupId>
    <artifactId>docker_bootartifactId>
    <version>1.0-SNAPSHOTversion>

    <properties>
        <project.build.sourceEncoding>UTF-8project.build.sourceEncoding>
        <maven.compiler.source>1.8maven.compiler.source>
        <maven.compiler.target>1.8maven.compiler.target>
        <junit.version>4.12junit.version>
        <log4j.version>1.2.17log4j.version>
        <lombok.version>1.16.18lombok.version>
        <mysql.version>5.1.47mysql.version>
        <druid.version>1.1.16druid.version>
        <mapper.version>4.1.5mapper.version>
        <mybatis.spring.boot.version>1.3.0mybatis.spring.boot.version>
    properties>

    <dependencies>
        
        <dependency>
            <groupId>org.springframework.bootgroupId>
            <artifactId>spring-boot-starter-webartifactId>
        dependency>
        <dependency>
            <groupId>org.springframework.bootgroupId>
            <artifactId>spring-boot-starter-actuatorartifactId>
        dependency>
        
        <dependency>
            <groupId>org.springframework.bootgroupId>
            <artifactId>spring-boot-starter-testartifactId>
            <scope>testscope>
        dependency>
    dependencies>

    <build>
        <plugins>
            <plugin>
                <groupId>org.springframework.bootgroupId>
                <artifactId>spring-boot-maven-pluginartifactId>
            plugin>
            <plugin>
                <groupId>org.apache.maven.pluginsgroupId>
                <artifactId>maven-resources-pluginartifactId>
                <version>3.1.0version>
            plugin>
        plugins>
    build>

project>

改yml

server.port=6001

写主类

package com.study;

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;

@SpringBootApplication
public class DockerBootApplication {

    public static void main(String[] args) {
        SpringApplication.run(DockerBootApplication.class, args);
    }

}

写服务

package com.study.controller;

import org.springframework.beans.factory.annotation.Value;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.bind.annotation.RestController;

import java.util.UUID;


@RestController
public class OrderController
{
    @Value("${server.port}")
    private String port;

    @RequestMapping("/order/docker")
    public String helloDocker()
    {
        return "hello docker"+"\t"+port+"\t"+ UUID.randomUUID().toString();
    }

    @RequestMapping(value ="/order/index",method = RequestMethod.GET)
    public String index()
    {
        return "服务端口号: "+"\t"+port+"\t"+UUID.randomUUID().toString();
    }
}

通过dockerfile发布微服务部署到docker容器

1.IDEA工具里面搞定微服务jar包

编写Dockerfile

Dockerfile内容:

这里注意反斜杠:要加上 /my_docker.jar

FROM centosjava8:1.5

# 作者
MAINTAINER xiaomiao

# VOLUME 指定临时文件目录为/tmp，在主机/var/lib/docker目录下创建了一个临时文件并链接到容器的/tmp
VOLUME /tmp

# 将jar包添加到容器中并更名为my_docker.jar
ADD docker_boot-1.0-SNAPSHOT.jar /my_docker.jar

# 运行jar包
RUN bash -c 'touch /my_docker.jar'

ENTRYPOINT ["java","-jar","/my_docker.jar"]

# 暴露6001端口作为微服务
EXPOSE 6001

打包成镜像

docker build -t my_docker:1.6 .

运行镜像微服务

 docker run -d -p 6001:6001 my_docker:1.6

访问:

http://192.168.196.100:6001/order/docker