背景

• 在hive中进行表创建的时候，报无创建权限的错误，如下所示：

Caused by: org.apache.hadoop.hive.ql.security.authorization.plugin.HiveAccessControlException: Permission denied: user [hive] does not have [ALL] privilege on [hdfs://xxxxxxxxxx/xxxxxxxxxx/xxxxxxxxxx/xxxxxxxxxx/xxxxxxxxxx]
        at org.apache.ranger.authorization.hive.authorizer.RangerHiveAuthorizer.checkPrivileges(RangerHiveAuthorizer.java:274) ~[?:?]
        at org.apache.hadoop.hive.ql.Driver.doAuthorizationV2(Driver.java:974) ~[hive-exec-2.3.3.jar:2.3.3]
        at org.apache.hadoop.hive.ql.Driver.doAuthorization(Driver.java:761) ~[hive-exec-2.3.3.jar:2.3.3]
        at org.apache.hadoop.hive.ql.Driver.compile(Driver.java:550) ~[hive-exec-2.3.3.jar:2.3.3]

• 通过对代码的查看，发现hive用户虽有权限查看到对应的库表。但是在对库表进行创建和删除时，ranger这边检测对应的hdfs path及其子hdfs path均对hive用户有权限。

  
  
  ranger中hdfs path鉴权核心办法
  
  
  目前owner必须等于登录用户
• 但是上述鉴权方式不符合我们实际集群的权限结果，我们仅需要：一级目录和登录用户一致即可，因此需要对ranger的代码进行修改。

代码修改

• 修改了hive plugin中的RangerHiveAuthorizer.checkPrivileges方法

if(hiveObjType == HiveObjectType.URI && isPathInFSScheme(path)) {
    FsAction permission = getURIAccessType(hiveOpType);
    boolean isURIAccessAllowed = Boolean.FALSE;
    try {
        //只针对创建表和创建表by select的操作
        if(hiveOpType == HiveOperationType.CREATETABLE || hiveOpType == HiveOperationType.CREATETABLE_AS_SELECT){
            Path       filePath   = new Path(path);
            FileSystem fs         = FileSystem.get(filePath.toUri(), getHiveConf());
            FileStatus fileStatus = fs.getFileStatus(filePath);
            LOG.info("Login user is "+user+",hdfs file owner is "+fileStatus.getOwner());
            //如果登陆用户==文件属主的话则通过
            if (user.equals(fileStatus.getOwner())){
                isURIAccessAllowed = Boolean.TRUE;
            }
        }else{
            //其它的非CREATE相关的操作还是走原来的鉴权方式
            isURIAccessAllowed = isURIAccessAllowed(user, permission, path, getHiveConf());
        }
    }catch (IOException e){
        LOG.error("Falied to verify user URL permissions,Caused by: "+ e);
    }
    if(!isURIAccessAllowed) {
        throw new HiveAccessControlException(String.format("Permission denied: user [%s] does not have [%s] privilege on [%s]", user, permission.name(), path));
    }
    continue;
}