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Java通过ceph创建桶,桶策略,设置桶配额

郭和硕
2023-12-01

要在Java中使用Ceph创建桶、设置桶策略和配额,可以使用Ceph提供的Java SDK——Rados-Java。

以下是使用Rados-Java创建桶、设置桶策略和配额的示例代码:

import java.util.ArrayList;
import java.util.List;
import org.apache.commons.codec.binary.Base64;
import org.apache.commons.lang3.StringUtils;
import org.apache.commons.lang3.math.NumberUtils;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import com.ceph.rados.IoCTX;
import com.ceph.rados.exceptions.RadosException;
import com.ceph.radosgw.admin.RadosGWAdmin;
import com.ceph.radosgw.admin.model.BucketInfo;
import com.ceph.radosgw.admin.model.User;
import com.ceph.radosgw.admin.model.UserCaps;

public class CephExample {

  private static final Logger logger = LoggerFactory.getLogger(CephExample.class);

  public static void main(String[] args) {
    String accessKey = "your-access-key";
    String secretKey = "your-secret-key";
    String endpoint = "http://your-ceph-gateway-url:7480";

    try (RadosGWAdmin admin = new RadosGWAdmin(endpoint, accessKey, secretKey)) {
      String bucketName = "my-bucket";

      // 创建桶
      createBucket(admin, bucketName);

      // 设置桶策略
      setBucketPolicy(admin, bucketName);

      // 设置桶配额
      setBucketQuota(admin, bucketName, 1024L * 1024L * 1024L); // 1GB
    } catch (RadosException e) {
      logger.error("Error occurred: ", e);
    }
  }

  private static void createBucket(RadosGWAdmin admin, String bucketName) throws RadosException {
    // 创建用户
    User user = new User();
    user.setUid(bucketName);
    user.setDisplayName(bucketName);
    admin.createUser(user);

    // 获取用户密钥
    List<UserCaps> caps = admin.listUserCaps(bucketName);
    String secretKey = null;
    for (UserCaps cap : caps) {
      if (cap.getType().equals("s3")) {
        secretKey = StringUtils.substringAfter(cap.getCap(), "=");
        break;
      }
    }

    // 创建IoCTX
    IoCTX ioCtx = admin.openBucket(bucketName, accessKey, secretKey);

    // 创建桶
    ioCtx.create();
  }

  private static void setBucketPolicy(RadosGWAdmin admin, String bucketName) throws RadosException {
    // 设置桶策略
    String policy = "{\n" +
        "    \"Version\": \"2012-10-17\",\n" +
        "    \"Statement\": [\n" +
        "        {\n" +
        "            \"Effect\": \"Allow\",\n" +
        "            \"Principal\": { \"AWS\": \"*\" },\n" +
        "            \"Action\": [\n" +
        "                \"s3:GetBucketLocation\",\n" +
        "                \"s3:ListBucket\"\n" +
        "            ],\n" +
        "            \"Resource\": \"arn:aws:s3:::" + bucketName + "\"\n" +
        "        },\n" +
        "        {\n" +
        "            \"Effect\": \"Allow\",\n" +
        "            \"Principal\": { \"AWS\": \"*\" },\n" +
        "            \"Action\": [\n
        "                \"s3:GetObject\",\n" +
        "                \"s3:PutObject\",\n" +
        "                \"s3:DeleteObject\",\n" +
        "                \"s3:ListMultipartUploadParts\",\n" +
        "                \"s3:AbortMultipartUpload\",\n" +
        "                \"s3:ListBucketMultipartUploads\"\n" +
        "            ],\n" +
        "            \"Resource\": \"arn:aws:s3:::" + bucketName + "/*\"\n" +
        "        }\n" +
        "    ]\n" +
        "}";
admin.setBucketPolicy(bucketName, policy);
    }

private static void setBucketQuota(RadosGWAdmin admin, String bucketName, long quota) throws RadosException {
// 设置桶配额
admin.setBucketQuota(bucketName, quota, null);
    }
}

以上代码中,使用`RadosGWAdmin`类连接Ceph网关,并使用`createUser`方法创建一个用户,这个用户的`uid`和`displayName`都是桶名,这样就可以通过这个用户的密钥来操作这个桶了。 创建桶使用`openBucket`方法创建一个`IoCTX`对象,然后调用`create`方法来创建桶。 设置桶策略使用`setBucketPolicy`方法,传入桶名和JSON格式的策略字符串。 设置桶配额使用`setBucketQuota`方法,传入桶名和配额大小(以字节为单位)。

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