![]() ![]() ![]() In most Hadoop distributions, the data is stored in HDFS. HDFS, Azure Storage, and Data Lake Storage This directory exists so that you don't have to remember the version number.Įxample data and JAR files can be found on Hadoop Distributed File System at /example and /HdiSamples. current: This directory contains links to subdirectories under the 2.-43 directory.The number on your cluster may be different than the one listed here. 2.-43: The directory name is the version of the Hadoop platform used by HDInsight.This directory contains the following subdirectories: Hadoop-related files can be found on the cluster nodes at /usr/hdp. Once connected, you can then access the worker nodes by using SSH from a headnode.įor more information, see the Ports used by Apache Hadoop services on HDInsight document. You can only access the cluster head nodes through SSH from a client machine. Remote access to servicesĪuthenticate by using the cluster administrator user and password, and then sign in to Ambari.Īuthentication is plaintext - always use HTTPS to help ensure that the connection is secure. ![]() This command returns a JSON document describing the service, and then jq pulls out only the host_name value for the hosts. For example, to find the hosts for the HDFS name node, use the following command: curl -u admin -G "" | jq '.host_name' If you need to find the name of the node for a specific service, you can query Ambari for that component. jq is used to extract the host_name element value for each host. This command returns a JSON document that contains a list of the hosts in the cluster. When prompted, enter the password for the admin account. Replace CLUSTERNAME with the name of your cluster. You can also use the following to return a list of hosts from the Ambari REST API: curl -u admin -G "" | jq '._name' To find the cluster names, see the Hosts page on the Ambari Web UI. Internally, each node in the cluster has a name that is assigned during cluster configuration. The fully qualified domain name (FQDN) to use when connecting to the cluster from the internet is or (for SSH only). ![]() For more information, see Manage Domain-joined HDInsight clusters. Additional SSH accounts can be created, but they also have administrator access to the cluster.ĭomain-joined HDInsight supports multiple users and more granular permission and role settings. A single SSH user account is created with the cluster, with administrator level permissions. Unless domain-joined, HDInsight should be considered a single-user system. For more information, see Connect to HDInsight (Apache Hadoop) using SSH.
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