Docker Win10 遇到的坑

环境信息

pom

<?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 https://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>
    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>2.3.2.RELEASE</version>
        <relativePath/> <!-- lookup parent from repository -->
    </parent>
    <groupId>com.tangsm</groupId>
    <artifactId>spring-boot-demo</artifactId>
    <version>1.0-SNAPSHOT</version>
    <name>spring-boot-demo</name>
    <description>Demo project for Spring Boot</description>

    <properties>
        <java.version>1.8</java.version>
        <docker.image.prefix>registry.aliyuncs.com/linhuatest</docker.image.prefix>
    </properties>

    <dependencies>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-actuator</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>

        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>test</scope>
            <exclusions>
                <exclusion>
                    <groupId>org.junit.vintage</groupId>
                    <artifactId>junit-vintage-engine</artifactId>
                </exclusion>
            </exclusions>
        </dependency>
    </dependencies>

    <build>
        <plugins>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
            </plugin>
            <!-- docker插件 -->
            <plugin>
                <groupId>com.spotify</groupId>
                <artifactId>docker-maven-plugin</artifactId>
                <version>1.0.0</version>
                <configuration>
                    <imageName>${docker.image.prefix}/${project.artifactId}</imageName>
                    <!--docker文件所在的目录-->
                    <dockerDirectory>src/main/docker</dockerDirectory>
                    <resources>
                        <resource>
                            <targetPath>/</targetPath>
                            <directory>${project.build.directory}</directory>
                            <include>${project.build.finalName}.jar</include>
                        </resource>
                    </resources>
                </configuration>
            </plugin>
        </plugins>
    </build>

</project>

dockerfile

FROM java:8
VOLUME /tmp/tomcat
ADD spring-boot-demo-1.0-SNAPSHOT.jar springboot-docker.jar
ENTRYPOINT ["java","-Djava.security.egd=file:/dev/./urandom","-jar","/springboot-docker.jar"]

问题一：打包docker镜像报错，2375端口问题

【Docker】在本地打包maven程序为docker镜像报错： Connect to localhost:2375 [localhost/127.0.0.1, localhost/0:0:0:0:0:0:0:1]

错误信息：

[ERROR] Failed to execute goal com.spotify:docker-maven-plugin:1.0.0:build (default-cli) on project farm: Exception caught: java.util.concurrent.ExecutionException: com.spotify.docker.client.shaded.javax.ws.rs.ProcessingException: org.apache.http.conn.HttpHostConnectException: Connect to localhost:2375 [localhost/127.0.0.1, localhost/0:0:0:0:0:0:0:1] failed: Connection refused: connect -> [Help 1]

我的错误原因是我没有打开本地的docker 2375端口

打开方式：右击右下角的小鲸鱼（我用的是docker for window），点击settings => General 勾选“Expose daemon on tcp://localhost:2375 without TLS”

如下图

问题二、访问国外docker hub仓库，获取镜像失败

# maven清理打包并构建docker镜像
mvn clean package docker:build

# Spring Boot 2.3.0.M1直接支持Maven和Gradle的buildpack
mvn spring-boot:build-image

拉取镜像或者本地打包上传镜像报以下错误

Error response from daemon: Get https://registry-1.docker.io/v2/: net/http: request canceled while waiting for connection (Client.Timeout exceeded while awaiting headers)

此错误因为国内网络不能访问国外docker hub仓库引起的，需要配置国内镜像仓库，点击settings => Docker Engine 填入如下内容：

{
    
    
  "registry-mirrors": [
      "https://registry.docker-cn.com",
      "http://hub-mirror.c.163.com"
  ],
  "insecure-registries": [],
  "debug": true,
  "experimental": false
}

如图

参考

冰河团队：https://www.cnblogs.com/binghe001/p/12885714.html