springboot创建docker镜像

1.基于maven工程的一体化镜像构建

1.1 拷贝maven构建所需的settings.xml文件至工程目录下

<?xml version="1.0" encoding="UTF-8"?>

<!--
Licensed to the Apache Software Foundation (ASF) under one
or more contributor license agreements.  See the NOTICE file
distributed with this work for additional information
regarding copyright ownership.  The ASF licenses this file
to you under the Apache License, Version 2.0 (the
"License"); you may not use this file except in compliance
with the License.  You may obtain a copy of the License at

    http://www.apache.org/licenses/LICENSE-2.0

Unless required by applicable law or agreed to in writing,
software distributed under the License is distributed on an
"AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
KIND, either express or implied.  See the License for the
specific language governing permissions and limitations
under the License.
-->

<!--
 | This is the configuration file for Maven. It can be specified at two levels:
 |
 |  1. User Level. This settings.xml file provides configuration for a single user,
 |                 and is normally provided in ${user.home}/.m2/settings.xml.
 |
 |                 NOTE: This location can be overridden with the CLI option:
 |
 |                 -s /path/to/user/settings.xml
 |
 |  2. Global Level. This settings.xml file provides configuration for all Maven
 |                 users on a machine (assuming they're all using the same Maven
 |                 installation). It's normally provided in
 |                 ${maven.conf}/settings.xml.
 |
 |                 NOTE: This location can be overridden with the CLI option:
 |
 |                 -gs /path/to/global/settings.xml
 |
 | The sections in this sample file are intended to give you a running start at
 | getting the most out of your Maven installation. Where appropriate, the default
 | values (values used when the setting is not specified) are provided.
 |
 |-->
<settings xmlns="http://maven.apache.org/SETTINGS/1.0.0"
          xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
          xsi:schemaLocation="http://maven.apache.org/SETTINGS/1.0.0 http://maven.apache.org/xsd/settings-1.0.0.xsd">
  <!-- 
  <localRepository>/path/to/local/repo</localRepository>
  -->
  <!-- 
  <offline>false</offline>
  -->
  <pluginGroups>
    <!-- 
    <pluginGroup>com.your.plugins</pluginGroup>
    -->
  </pluginGroups>

  <proxies>
    <!-- 
    <proxy>
      <id>optional</id>
      <active>true</active>
      <protocol>http</protocol>
      <username>proxyuser</username>
      <password>proxypass</password>
      <host>proxy.host.net</host>
      <port>80</port>
      <nonProxyHosts>local.net|some.host.com</nonProxyHosts>
    </proxy>
    -->
  </proxies>

  <!--
    <server>
      <id>deploymentRepo</id>
      <username>repouser</username>
      <password>repopwd</password>
    </server>
    -->

    <!-- Another sample, using keys to authenticate.
    <server>
      <id>siteServer</id>
      <privateKey>/path/to/private/key</privateKey>
      <passphrase>optional; leave empty if not used.</passphrase>
    </server>
    -->
  </servers>
  <mirrors>
    <mirror>
      <id>tencent</id>
      <name>aliyun</name>
      <url>https://maven.aliyun.com/repository/central</url>
      <mirrorOf>*</mirrorOf>
    </mirror>
  </mirrors>
  <profiles>
    <!-- 
    <profile>
      <id>jdk-1.4</id>

      <activation>
        <jdk>1.4</jdk>
      </activation>

      <repositories>
        <repository>
          <id>jdk14</id>
          <name>Repository for JDK 1.4 builds</name>
          <url>http://www.myhost.com/maven/jdk14</url>
          <layout>default</layout>
          <snapshotPolicy>always</snapshotPolicy>
        </repository>
      </repositories>
    </profile>
    -->

    <!--
    <profile>
      <id>env-dev</id>

      <activation>
        <property>
          <name>target-env</name>
          <value>dev</value>
        </property>
      </activation>

      <properties>
        <tomcatPath>/path/to/tomcat/instance</tomcatPath>
      </properties>
    </profile>
    -->
  </profiles>

  <!-- 
  <activeProfiles>
    <activeProfile>alwaysActiveProfile</activeProfile>
    <activeProfile>anotherAlwaysActiveProfile</activeProfile>
  </activeProfiles>
  -->
</settings>

1.2 编写Dockerfile文件

# 二开推荐阅读[如何提高项目构建效率](https://developers.weixin.qq.com/miniprogram/dev/wxcloudrun/src/scene/build/speed.html)
# 选择构建用基础镜像。如需更换，请到[dockerhub官方仓库](https://hub.docker.com/_/java?tab=tags)自行选择后替换。
FROM maven as build

# 指定构建过程中的工作目录
WORKDIR /app

# 将src目录下所有文件，拷贝到工作目录中src目录下（.gitignore/.dockerignore中文件除外）
COPY src /app/src

# 将pom.xml文件，拷贝到工作目录下
COPY settings.xml pom.xml /app/

# 执行代码编译命令
# 自定义settings.xml, 选用国内镜像源以提高下载速度
RUN mvn -s /app/settings.xml -f /app/pom.xml clean package

# 选择运行时基础镜像
FROM  openjdk:17

# 指定运行时的工作目录
WORKDIR /app

# 将构建产物jar包拷贝到运行时目录中
COPY --from=build /app/target/*.jar .

# 暴露端口
EXPOSE 8080

# 执行启动命令.
CMD ["java", "-jar", "/app/demo-0.0.1-SNAPSHOT.jar"]

1.3 构建镜像

docker build  -t springboot .

1.4 将镜像上传至私有仓库

1. 镜像打标签

docker tag springboot:latest 192.168.154.129:5000/springboot:latest

2. 上传至镜像仓库

docker pull  192.168.154.129:5000/springboot:latest

注：若上传至Docker Hub，请将地址（192.168.154.129:5000）替换为你的用户名，并先登录Docker Hub

docker login -u your_username -p your_password

2.基于可执行jar包的镜像构建

2.1 编写Dockerfile文件

# 选择运行时基础镜像
FROM  openjdk:17

# 指定运行时的工作目录
WORKDIR /app

# 将构建产物jar包拷贝到运行时目录中,build
COPY demo-0.0.1-SNAPSHOT.jar /app/

# 暴露端口
EXPOSE 8080

# 执行启动命令.
CMD ["java", "-jar", "/app/demo-0.0.1-SNAPSHOT.jar"]

2.2 构建镜像同1.3

2.3 将镜像上传至私有仓库同1.4