node services

Starts, stops, or restarts services on one or more server nodes. Permissions required: ss, fc or a.

To start or stop services, you must specify the service name, the action (start, stop, or restart), and the nodes on which to perform the action. You can specify the nodes in either of two ways:

Use the nodes parameter to specify a space-delimited list of node names.
Use the filter parameter to specify all nodes that match a certain pattern. See Filters for more information.

Syntax

CLI

maprcli node services
    [ -action start|stop|restart]
    [ -cldb start|stop|restart]
    [ -cluster <cluster> ]
    [ -fileserver start|stop|restart]
    [ -filter <filter> ]
    [ -hbmaster start|stop|restart]
    [ -hbregionserver start|stop|restart]
    [ -jobtracker start|stop|restart]
    [ -name <service> ]
    [ -nfs start|stop|restart]
    [ -nodes <node names> ]
    [ -tasktracker start|stop|restart]
    [ -webserver start|stop|restart]
    [ -zkconnect <ZooKeeper Connect String> ]

REST

http[s]://<host>:<port>/rest/node/services?<parameters>

Parameters

To perform an action on a service, on a particular set of nodes, you must specify the following three parameters:

action- the action to perform; starting, stopping, or restarting a service.
node or filter - the nodes on which to perform the action; either a list of nodes, or a filter that matches a set of nodes
name - the service on which to perform the action

The following table lists the parameters available with the node services command.

Parameter	Description
action	An action to perform on a service specified in the `name` parameter: Values: start, stop, or restart
cldb	Starts, stops, or restarts the cldb service. Values: start, stop, or restart
cluster	The cluster on which to run the command.
fileserver	Starts, stops, or restarts the fileserver service. Values: start, stop, or restart
filter	A filter specifying nodes on which to start or stop services. For fields to use with the filter, see the Fields table in the node list command. See Filters for more information about filters.
hbmaster	Starts, stops, or restarts the hbmaster service. Values: start, stop, or restart
hbregionserver	Starts, stops, or restarts the hbregionserver service. Values: start, stop, or restart
jobtracker	Starts, stops, or restarts the jobtracker service. Values: start, stop, or restart
name	A service on which to perform an action specified by the `action` parameter. Any service can be specified with this option, but the following services can be specified only with the `name` option: `historyserver`, `hivemeta`, `hoststats`, `hs2`, `httpfs`, `hue`, `nodemanager`, `oozie`, `and resourcemanager.`
nfs	Starts, stops, or restarts the nfs service. Values: start, stop, or restart
nodes	A list of node names, separated by spaces.
tasktracker	Starts, stops, or restarts the tasktracker service. Values: start, stop, or restart
webserver	Starts, stops, or restarts the web server service. Values: start, stop, or restart
zkconnect	ZooKeeper Connect String

Examples

Start the NodeManager Service

maprcli node services -name nodemanager -action start

Stop the ResourceManager Service

maprcli node services -name resourcemanager -action stop

Stop the ResourceManager Service

maprcli node services -name resourcemanager -action restart

Restart nfs server

maprcli node services -nodes hadoop1 -nfs restart

Restart nfs server using a filter

Using a filter is common, especially in HBase environments, where full restarts of region and master servers are needed.

maprcli node services -filter ["csvc==nfs"] -nfs restart

Start the Hue Service

maprcli node services -name hue -action start -nodes <node n>

Restart specified TaskTrackers in the Cluster

To restart TaskTrackers on specific nodes, provide the list of nodes in the nodes parameter.

maprcli node services -tasktracker restart -nodes <node 1> <node 2> <node 3>

Restart all TaskTrackers in the Cluster

Instead of specifying a list of all nodes in the cluster that are running the TaskTracker service, you can use the filter parameter to restart every tasktracker by matching only nodes on which the TaskTracker is configured. Remember that csvc is the short name of the configuredservice field. See the Fields table on the node list page.

maprcli node services -tasktracker restart -filter '[csvc==tasktracker]'

Restart the hoststats service

Restart the hoststats service after making changes to the MapR Metrics database. You do not need to restart warden.

maprcli node services -name hoststats -action restart -nodes <nodes>
 
OR
 
maprcli node services -name hoststats -action restart -filter '[csvc==hoststats]'