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hive任务提交的相关权限认证详析

时间:2021-07-01 10:21:17 帮助过:17人阅读

最近在研究Hue,遇到一个问题,在HiveEditor写一个HQL,提交后会报权限错误,类似这样的Authorizationfailed:NoprivilegeSelectfoundforinputs&n..

最近在研究Hue,遇到一个问题,在Hive Editor写一个HQL,提交后会报权限错误,类似这样的

Authorization failed:No privilege 'Select' found for inputs {database:xxx, table:xxx, columnName:xxx}. Use show grant to get more details.

Hue的登录用户是hadoop,使用cli方式查询的时候,是没问题的,但是使用Hue连接HiveServer2的方式,就查询不了对应的表了,排除Hue的干扰,使用Beeline来连接HiveServer2,同样报权限的错误,堆栈信息如下图



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根据堆栈信息大概梳理了下源码(只列出比较重要的代码),Hive提交SQL的权限验证流程如下

Driver.compile(String command, boolean resetTaskIds){ if (HiveConf.getBoolVar(conf, HiveConf.ConfVars.HIVE_AUTHORIZATION_ENABLED)) { try { perfLogger.PerfLogBegin(LOG, PerfLogger.DO_AUTHORIZATION); //进行权限校验 doAuthorization(sem); } } Driver.doAuthorization(BaseSemanticAnalyzer sem){ //判断op的操作类型为QUERY if (op.equals(HiveOperation.CREATETABLE_AS_SELECT) || op.equals(HiveOperation.QUERY)) { if (cols != null && cols.size() > 0) { //进行更具体的验证 ss.getAuthorizer().authorize(tbl, null, cols, op.getInputRequiredPrivileges(), null); } } } BitSetCheckedAuthorizationProvider.authorize(Table table, Partition part, List columns,Privilege[] inputRequiredPriv, Privilege[] outputRequiredPriv){ //验证用户对DB和Table的权限 authorizeUserDBAndTable(table, inputRequiredPriv, outputRequiredPriv,inputCheck,outputCheck) //验证用户对Table中column的权限 for (String col : columns) { PrincipalPrivilegeSet partColumnPrivileges = hive_db .get_privilege_set(HiveObjectType.COLUMN, table.getDbName(),table.getTableName(),partValues, col,this.getAuthenticator().getUserName(), this.getAuthenticator().getGroupNames()); authorizePrivileges(partColumnPrivileges, inputRequiredPriv, inputCheck2, outputRequiredPriv, outputCheck2); } }

Hive的权限验证首先会调用authorizeUserDBAndTable验证用户是否对访问的DB和Table有访问权限,对应到MetaStore的DB_PRIVS和TBL_PRIVS表,在进行验证的时候,会通过thrift与HiveMetaStore进程进行交互来获取MetaStore库中对应表的相关信息。如果用户对更大粒度的资源有访问权限,则会直接返回,不会再继续进行更细粒度的验证,也就是说如果用户对DB有相关的权限,则不会继续验证对Table和Column的访问权限。

查看了下DB_PRIVS表,hadoop用户对访问的数据库是有Select权限的,所以再传统CLI模式下访问是没有问题的。看上述代码也都是在预料之中,因为实际上CLI模式和HiveServer模式的权限验证是一套代码。决定remote debug下,进而发现this.getAuthenticator().getUserName()的值为hive,也即是启动HiveServer2的用户,而不是提交SQL的用户hadoop,顺藤摸瓜,找到了设置authenticator相关属性的代码

SessionState.start(SessionState startSs) { //实例化默认的HadoopDefaultAuthenticator,方法内部,,使用ReflectionUtils反射加载类的时候,进而调用了HadoopDefaultAuthenticator.setConf方法 startSs.authenticator=HiveUtils.getAuthenticator(startSs.getConf(),HiveConf.ConfVars.HIVE_AUTHENTICATOR_MANAGER); } HadoopDefaultAuthenticator.setConf(Configuration conf){ ugi = ShimLoader.getHadoopShims().getUGIForConf(conf); } HadoopShimsSecure.getUGIForConf(Configuration conf) throws IOException { return UserGroupInformation.getCurrentUser(); } UserGroupInformation.getCurrentUser() throws IOException { AccessControlContext context = AccessController.getContext(); Subject subject = Subject.getSubject(context); //HiveServer刚启动的时候,subject为空,调用getLoginUser if (subject == null || subject.getPrincipals(User.class).isEmpty()) { return getLoginUser(); } else { return new UserGroupInformation(subject); } } UserGroupInformation.getLoginUser() { if (loginUser == null) { try { Subject subject = new Subject(); LoginContext login; if (isSecurityEnabled()) { login = newLoginContext(HadoopConfiguration.USER_KERBEROS_CONFIG_NAME, subject, new HadoopConfiguration()); } else { login = newLoginContext(HadoopConfiguration.SIMPLE_CONFIG_NAME, subject, new HadoopConfiguration()); } login.login(); loginUser = new UserGroupInformation(subject); loginUser.setLogin(login); loginUser.setAuthenticationMethod(isSecurityEnabled() ? AuthenticationMethod.KERBEROS : AuthenticationMethod.SIMPLE); loginUser = new UserGroupInformation(login.getSubject()); String fileLocation = System.getenv(HADOOP_TOKEN_FILE_LOCATION); if (fileLocation != null) { Credentials cred = Credentials.readTokenStorageFile( new File(fileLocation), conf); loginUser.addCredentials(cred); } loginUser.spawnAutoRenewalThreadForUserCreds(); } catch (LoginException le) { LOG.debug("failure to login", le); throw new IOException("failure to login", le); } if (LOG.isDebugEnabled()) { LOG.debug("UGI loginUser:"+loginUser); } } return loginUser; }

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