node - Cloudera Distribution for Hadoop

Purpose

This command operates on any node in the cluster to control services and provide status.

Syntax

Parameters

hcli node info [ --option]

Display node information about the specified options.

The exit code is 0 if the command is successful.

Option	Description
--clustername	Displays the name of the cluster.
--node_type	Displays the type of node, for example, a data node or master node.
--cdh_version	Displays CDH version only.
--teradata-hadoop-tools-cdh_version	Displays all the information (cluster name, version numbers, node type) in JSON format.
--json	Outputs all the information in JSON format for cluster name, version numbers, node type.

To display information for all components on the node, run hcli node info

+------------------------------------+-----------+
| Header                             | Value     |
+------------------------------------+-----------+
| cluster_name                       | c1        |
| teradata-hadoop-tools-cdh_version  | 5.4.50.x  |
| cdh_version                        | 5.4.5     |
| node_type                          | master    |
+------------------------------------+-----------+

To display the cluster name, run hcli node info --clustername.

c1

hcli node runonall [--master | --data | --edge] [--parallel] [--help] 'cmd' [--option]

Run a command on multiple Hadoop nodes. The command is required and must be in quotes. If no option is specified, the command runs on all nodes by default.

Option	Description
-m | --master	Run on master nodes
-d | --data	Run on data nodes
-e | --edge	Run on edge nodes
-p | --parallel	Run command on nodes in parallel

Exit code 0 indicates the command succeeded; exit code 1 indicates the command was unsuccessful.

hcli node copytoall src [additional src] --dest dir [--option]

Copy a file or directory to multiple Hadoop nodes. If no option is specified, the file or directory copies to all nodes by default.

• src Names the source file or directory. Multiple allowed.
• -D | --dest dir Names the destination directory.
• -r | --recursive Copies recursively.

Option	Description
-m | --master	Copies file or directory to master nodes
-d | --data	Copies file or directory to data nodes
-e | --edge	Copies file or directory to edge nodes

Exit code 0 indicates the command succeeded; other exit codes indicate the number of nodes on which the command failed.

hcli node copytoall /etc/hosts --dest /etc