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| <h5>MapReduce REST APIs</h5> |
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| <h5>YARN</h5> |
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| <a href="../hadoop-yarn/hadoop-yarn-site/WebApplicationProxy.html">Web Application Proxy</a> |
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| <a href="../hadoop-yarn/hadoop-yarn-site/NodeManagerCgroups.html">Using CGroups</a> |
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| <a href="../hadoop-yarn/hadoop-yarn-site/SecureContainer.html">Secure Containers</a> |
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| <a href="../hadoop-yarn/hadoop-yarn-site/ReservationSystem.html">Reservation System</a> |
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| <a href="../hadoop-yarn/hadoop-yarn-site/GracefulDecommission.html">Graceful Decommission</a> |
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| <a href="../hadoop-yarn/hadoop-yarn-site/OpportunisticContainers.html">Opportunistic Containers</a> |
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| <a href="../hadoop-yarn/hadoop-yarn-site/Federation.html">YARN Federation</a> |
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| <a href="../hadoop-yarn/hadoop-yarn-site/SharedCache.html">Shared Cache</a> |
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| <a href="../hadoop-yarn/hadoop-yarn-site/UsingGpus.html">Using GPU</a> |
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| <a href="../hadoop-yarn/hadoop-yarn-site/UsingFPGA.html">Using FPGA</a> |
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| <a href="../hadoop-yarn/hadoop-yarn-site/PlacementConstraints.html">Placement Constraints</a> |
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| <a href="../hadoop-yarn/hadoop-yarn-site/YarnUI2.html">YARN UI2</a> |
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| <h5>YARN REST APIs</h5> |
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| <a href="../hadoop-yarn/hadoop-yarn-site/WebServicesIntro.html">Introduction</a> |
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| <a href="../hadoop-yarn/hadoop-yarn-site/ResourceManagerRest.html">Resource Manager</a> |
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| <a href="../hadoop-yarn/hadoop-yarn-site/NodeManagerRest.html">Node Manager</a> |
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| <a href="../hadoop-yarn/hadoop-yarn-site/TimelineServer.html#Timeline_Server_REST_API_v1">Timeline Server</a> |
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| <a href="../hadoop-yarn/hadoop-yarn-site/TimelineServiceV2.html#Timeline_Service_v.2_REST_API">Timeline Service V.2</a> |
| </li> |
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| <h5>YARN Service</h5> |
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| <a href="../hadoop-yarn/hadoop-yarn-site/yarn-service/Overview.html">Overview</a> |
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| <a href="../hadoop-yarn/hadoop-yarn-site/yarn-service/QuickStart.html">QuickStart</a> |
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| <a href="../hadoop-yarn/hadoop-yarn-site/yarn-service/Concepts.html">Concepts</a> |
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| <a href="../hadoop-yarn/hadoop-yarn-site/yarn-service/YarnServiceAPI.html">Yarn Service API</a> |
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| <a href="../hadoop-yarn/hadoop-yarn-site/yarn-service/ServiceDiscovery.html">Service Discovery</a> |
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| <h5>Hadoop Compatible File Systems</h5> |
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| <a href="../hadoop-aliyun/tools/hadoop-aliyun/index.html">Aliyun OSS</a> |
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| <a href="../hadoop-aws/tools/hadoop-aws/index.html">Amazon S3</a> |
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| <a href="../hadoop-azure/index.html">Azure Blob Storage</a> |
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| <a href="../hadoop-azure-datalake/index.html">Azure Data Lake Storage</a> |
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| <a href="../hadoop-openstack/index.html">OpenStack Swift</a> |
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| <a href="../hadoop-cos/cloud-storage/index.html">Tencent COS</a> |
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| <h5>Tools</h5> |
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| <a href="../hadoop-resourceestimator/ResourceEstimator.html">Resource Estimator Service</a> |
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| <h5>Reference</h5> |
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| <a href="../hadoop-project-dist/hadoop-common/Metrics.html">Metrics</a> |
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| <h5>Configuration</h5> |
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| <a href="../hadoop-project-dist/hadoop-common/core-default.xml">core-default.xml</a> |
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| <a href="../hadoop-project-dist/hadoop-hdfs/hdfs-default.xml">hdfs-default.xml</a> |
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| <a href="../hadoop-project-dist/hadoop-hdfs-rbf/hdfs-rbf-default.xml">hdfs-rbf-default.xml</a> |
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| <a href="../hadoop-mapreduce-client/hadoop-mapreduce-client-core/mapred-default.xml">mapred-default.xml</a> |
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| <a href="../hadoop-yarn/hadoop-yarn-common/yarn-default.xml">yarn-default.xml</a> |
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| <a href="../hadoop-kms/kms-default.html">kms-default.xml</a> |
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| <a href="../hadoop-hdfs-httpfs/httpfs-default.html">httpfs-default.xml</a> |
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| <a href="../hadoop-project-dist/hadoop-common/DeprecatedProperties.html">Deprecated Properties</a> |
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| <h1>Hadoop HDFS over HTTP - Using HTTP Tools</h1> |
| <div class="section"> |
| <h2><a name="Security"></a>Security</h2> |
| <p>Out of the box HttpFS supports both pseudo authentication and Kerberos HTTP SPNEGO authentication.</p> |
| <div class="section"> |
| <h3><a name="Pseudo_Authentication"></a>Pseudo Authentication</h3> |
| <p>With pseudo authentication the user name must be specified in the <tt>user.name=<USERNAME></tt> query string parameter of a HttpFS URL. For example:</p> |
| |
| <div> |
| <div> |
| <pre class="source">$ curl "http://<HTTFS_HOST>:14000/webhdfs/v1?op=homedir&user.name=babu" |
| </pre></div></div> |
| </div> |
| <div class="section"> |
| <h3><a name="Kerberos_HTTP_SPNEGO_Authentication"></a>Kerberos HTTP SPNEGO Authentication</h3> |
| <p>Kerberos HTTP SPNEGO authentication requires a tool or library supporting Kerberos HTTP SPNEGO protocol.</p> |
| <p>IMPORTANT: If using <tt>curl</tt>, the <tt>curl</tt> version being used must support GSS (<tt>curl -V</tt> prints out ‘GSS’ if it supports it).</p> |
| <p>For example:</p> |
| |
| <div> |
| <div> |
| <pre class="source">$ kinit |
| Please enter the password for user@LOCALHOST: |
| $ curl --negotiate -u foo "http://<HTTPFS_HOST>:14000/webhdfs/v1?op=homedir" |
| Enter host password for user 'foo': |
| </pre></div></div> |
| |
| <p>NOTE: the <tt>-u USER</tt> option is required by the <tt>--negotiate</tt> but it is not used. Use any value as <tt>USER</tt> and when asked for the password press [ENTER] as the password value is ignored.</p></div> |
| <div class="section"> |
| <h3><a name="Remembering_Who_I_Am_.28Establishing_an_Authenticated_Session.29"></a>Remembering Who I Am (Establishing an Authenticated Session)</h3> |
| <p>As most authentication mechanisms, Hadoop HTTP authentication authenticates users once and issues a short-lived authentication token to be presented in subsequent requests. This authentication token is a signed HTTP Cookie.</p> |
| <p>When using tools like <tt>curl</tt>, the authentication token must be stored on the first request doing authentication, and submitted in subsequent requests. To do this with curl the <tt>-b</tt> and <tt>-c</tt> options to save and send HTTP Cookies must be used.</p> |
| <p>For example, the first request doing authentication should save the received HTTP Cookies.</p> |
| <p>Using Pseudo Authentication:</p> |
| |
| <div> |
| <div> |
| <pre class="source">$ curl -c ~/.httpfsauth "http://<HTTPFS_HOST>:14000/webhdfs/v1?op=homedir&user.name=foo" |
| </pre></div></div> |
| |
| <p>Using Kerberos HTTP SPNEGO authentication:</p> |
| |
| <div> |
| <div> |
| <pre class="source">$ curl --negotiate -u foo -c ~/.httpfsauth "http://<HTTPFS_HOST>:14000/webhdfs/v1?op=homedir" |
| </pre></div></div> |
| |
| <p>Then, subsequent requests forward the previously received HTTP Cookie:</p> |
| |
| <div> |
| <div> |
| <pre class="source">$ curl -b ~/.httpfsauth "http://<HTTPFS_HOST>:14000/webhdfs/v1?op=liststatus" |
| </pre></div></div></div></div> |
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