在推送镜像文件到镜像仓库时,我们往往是在镜像文件所在的那个主机上,以 root 用户的权限,执行 docker push 命令,完成镜像推送的工作。
但有这么一种令人匪夷所思的人,他直接打一个离线的镜像包(docker save tomcat:latest > tomcat-892148dsadg-v1.tar)出来,比如 tomcat-892148dsadg-v1.tar ,然后通过邮件或者其它通讯工具发给你,让你推送到镜像仓库。
这时,你怎么搞?直接通过 shell 指令操作,可行吗?当然可以,只要在有 docker 环境的服务器上,以 root 权限的用户执行下面 5 步就能完成:
上面的方式,看着是很清晰地解决了问题,但一般来说,开发人员很少能直接操控服务器,更别提拿到 root 用户,在一些权限管控严格的企业,这种方式想想就好了,或者让运维来。
那还有其它方式吗?当然!那就直接用 java 操作 docker 命令实现离线的 tar包 推送至 harbor 仓库吧!
在 pom.xml 文件中引入下面的两个依赖
<dependency>
<groupId>com.github.docker-javagroupId>
<artifactId>docker-javaartifactId>
<version>3.2.13version>
dependency>
<dependency>
<groupId>com.github.docker-javagroupId>
<artifactId>docker-java-transport-httpclient5artifactId>
<version>3.2.13version>
dependency>
application.properties 配置文件
harbor.username=harbor
harbor.password=Harbor123!
工具类
import com.github.dockerjava.api.DockerClient;
import com.github.dockerjava.api.model.AuthConfig;
import com.github.dockerjava.api.model.Image;
import com.github.dockerjava.core.DefaultDockerClientConfig;
import com.github.dockerjava.core.DockerClientImpl;
import com.github.dockerjava.httpclient5.ApacheDockerHttpClient;
import com.github.dockerjava.transport.DockerHttpClient;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.stereotype.Service;
import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.time.Duration;
import java.util.List;
/**
* @author yuhuofei
* @version 1.0
* @description 镜像上传工具类
* @date 2022/6/13 21:19
*/
@Service
@Slf4j
public class DockerUtils {
@Value("${harbor.username}")
private String harborUserName;
@Value("${harbor.password}")
private String harborPassWord;
/**
* 获取dockerClient对象
*/
public DockerClient getDockerClient() {
//创建DefaultDockerClientConfig(当前服务器的默认配置)
DefaultDockerClientConfig config = DefaultDockerClientConfig.createDefaultConfigBuilder().build();
//创建DockerHttpClient
DockerHttpClient httpClient = new ApacheDockerHttpClient.Builder()
.dockerHost(config.getDockerHost())
.maxConnections(100)
.connectionTimeout(Duration.ofSeconds(30))
.responseTimeout(Duration.ofSeconds(45))
.build();
//创建DockerClient
return DockerClientImpl.getInstance(config, httpClient);
}
/**
* @param file 镜像文件
* @param imageName 镜像名称,格式最好是:镜像名-镜像id-版本号.tar
* @param harborLoginUrl harbor仓库地址
* @param imageId 镜像id
* @param tag 版本号
*/
public void uploadImage(File file, String imageName, String harborLoginUrl, String imageId, String tag) {
log.info("上传镜像文件时,传递的参数:{},{},{},{},{}", file.getAbsolutePath(), imageName, harborLoginUrl, imageId, tag);
try (InputStream inputStream = new FileInputStream(file)) {
DockerClient dockerClient = getDockerClient();
//Harbor登录信息
AuthConfig autoConfig = new AuthConfig().withRegistryAddress(harborLoginUrl).withUsername(harborUserName).withPassword(harborPassWord);
//加载镜像
log.info("====开始加载镜像====,{}", inputStream);
dockerClient.loadImageCmd(inputStream).exec();
//获取加载镜像的名称,如果根据镜像名称去匹配,有可能重复,所以用镜像id去匹配
String uploadImageName = "";
List<Image> list = dockerClient.listImagesCmd().exec();
for (Image image : list) {
if (image.getId().contains(imageId)) {
uploadImageName = image.getRepoTags()[0];
}
}
//给镜像打上tag
log.info("原始镜像名:{},要修改的镜像名:{}", uploadImageName, imageName);
dockerClient.tagImageCmd(uploadImageName, imageName, tag).exec();
//推送镜像至镜像仓库
dockerClient.pushImageCmd(imageName).withAuthConfig(autoConfig).start().awaitCompletion();
//push成功后,删除本地加载的镜像
dockerClient.removeImageCmd(imageName).exec();
dockerClient.removeImageCmd(uploadImageName).exec();
} catch (InterruptedException exception) {
throw new BaseException("推送镜像到镜像仓库异常:{}", exception);
} catch (IOException e) {
throw new BaseException("镜像文件流处理异常");
}
}
}
application.properties 文件的配置
docker.server.url=tcp://xxxxxx:2376
docker.cert.path=/home/user/.docker/certs
api.version=1.41
registry.url=https://index.docker.io/v1/
registry.username=docker
registry.password=Docker123!
registry.email=xxxxxxx@qq.com
harbor.username=harbor
harbor.password=Harbor123!
工具类
import com.github.dockerjava.api.DockerClient;
import com.github.dockerjava.api.model.AuthConfig;
import com.github.dockerjava.api.model.Image;
import com.github.dockerjava.core.DefaultDockerClientConfig;
import com.github.dockerjava.core.DockerClientImpl;
import com.github.dockerjava.httpclient5.ApacheDockerHttpClient;
import com.github.dockerjava.transport.DockerHttpClient;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.stereotype.Service;
import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.time.Duration;
import java.util.List;
/**
* @author yuhuofei
* @version 1.0
* @description 镜像上传工具类
* @date 2022/6/13 21:19
*/
@Service
@Slf4j
public class DockerUtils {
@Value("${docker.server.url}")
private String dockerServerUrl;
@Value("${docker.cert.path}")
private String dcokerCertPath;
@Value("${registry.user}")
private String registryUser;
@Value("${registry.pass}")
private String registryPass;
@Value("${registry.mail}")
private String registryMail;
@Value("${registry.url}")
private String registryUrl;
//harbor仓库登录用户名
@Value("${harbor.username}")
private String harborUserName;
//harbor仓库登录密码
@Value("${harbor.password}")
private String harborPassWord;
/**
* 获取dockerClient对象
*/
public DockerClient getDockerClient() {
//创建DefaultDockerClientConfig(指定docker服务器的配置)
DockerClientConfig config = DefaultDockerClientConfig.createDefaultConfigBuilder()
.withDockerHost(dockerServerUrl)
.withDockerTlsVerify(true)
.withDockerCertPath(dcokerCertPath)
.withRegistryUsername(registryUser)
.withRegistryPassword(registryPass)
.withRegistryEmail(registryMail)
.withRegistryUrl(registryUrl)
.build();
//创建DockerHttpClient
DockerHttpClient httpClient = new ApacheDockerHttpClient.Builder()
.dockerHost(config.getDockerHost())
.maxConnections(100)
.connectionTimeout(Duration.ofSeconds(30))
.responseTimeout(Duration.ofSeconds(45))
.build();
//创建DockerClient
return DockerClientImpl.getInstance(config, httpClient);
}
/**
* @param file 镜像文件
* @param imageName 镜像名称,格式最好是:镜像名-镜像id-版本号.tar
* @param harborLoginUrl harbor仓库地址
* @param imageId 镜像id
* @param tag 版本号
*/
public void uploadImage(File file, String imageName, String harborLoginUrl, String imageId, String tag) {
log.info("上传镜像文件时,传递的参数:{},{},{},{},{}", file.getAbsolutePath(), imageName, harborLoginUrl, imageId, tag);
try (InputStream inputStream = new FileInputStream(file)) {
DockerClient dockerClient = getDockerClient();
//Harbor登录信息
AuthConfig autoConfig = new AuthConfig().withRegistryAddress(harborLoginUrl).withUsername(harborUserName).withPassword(harborPassWord);
//加载镜像
log.info("====开始加载镜像====,{}", inputStream);
dockerClient.loadImageCmd(inputStream).exec();
//获取加载镜像的名称,如果根据镜像名称去匹配,有可能重复,所以用镜像id去匹配
String uploadImageName = "";
List<Image> list = dockerClient.listImagesCmd().exec();
for (Image image : list) {
if (image.getId().contains(imageId)) {
uploadImageName = image.getRepoTags()[0];
}
}
//给镜像打上tag
log.info("原始镜像名:{},要修改的镜像名:{}", uploadImageName, imageName);
dockerClient.tagImageCmd(uploadImageName, imageName, tag).exec();
//推送镜像至镜像仓库
dockerClient.pushImageCmd(imageName).withAuthConfig(autoConfig).start().awaitCompletion();
//push成功后,删除本地加载的镜像
dockerClient.removeImageCmd(imageName).exec();
dockerClient.removeImageCmd(uploadImageName).exec();
} catch (InterruptedException exception) {
throw new Exception("推送镜像到镜像仓库异常:{}", exception);
} catch (IOException e) {
throw new Exception("镜像文件流处理异常");
}
}
}