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 one 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

/opt/mapr/bin/maprcli node services
    [ -action start|stop|restart|enable|disable ]
    [ -apiserver start|stop|restart|enable|disable ]
    [ -cldb start|stop|restart|enable|disable ]
    [ -cluster <cluster> ]
    [ -fileserver start|stop|restart|enable|disable ]
    [ -filter <filter> ]

    [ -name <service> ]
    [ -nfs start|stop|restart|enable|disable ]
    [ -nfs4 start|stop|restart|enable|disable ]
    [ -nodes <node names> ]

    [ -zkconnect <ZooKeeper Connect String> ]

REST

Request Type	POST
Request URL	`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:
- Start, stop, restart a service.
- Disable a service to prevent it from starting when Warden restarts and enable a service to allow the service to start when Warden restarts.
NOTE Suspend and resume are not supported.
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, suspend, resume, restart, enable, or disable
`apiserver`	Starts, stops, or restarts the apiserver. Values: start, stop, restart, enable, or disable
`cldb`	Starts, stops, or restarts the cldb service. Values: start, stop, suspend, resume, restart, enable, or disable
`cluster`	The cluster on which to run the command.
`fileserver`	Starts, stops, or restarts the fileserver service. Values: start, stop, suspend, resume, restart, enable, or disable
`filter`	A filter specifying nodes on which to start or stop services. For fields to use with the filter, see the node table. See Filters for more information about filters. NOTE You must specify either the `filter` parameter or the `nodes` parameter.
`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: `collectd`, `elasticsearch`, `fluentd`, `grafana`, `historyserver`, `hivemeta`, `hoststats`, `hs2`, `httpfs`, `hue`, `kibana`, `nodemanager`, `opentsdb`, `oozie`, and `resourcemanager.`
`nfs`	Starts, stops, or restarts the nfs service. Values: start, stop, suspend, resume, restart, enable, or disable
`nfs4`	Starts, stops, or restarts the NFSv4 service. Values: start, stop, restart, enable, or disable
`nodes`	A list of node names, separated by spaces. NOTE Either this or `filter` is required.
`zkconnect`	The ZooKeeper Connect String.

Examples

Start the NodeManager Service

/opt/mapr/bin/maprcli node services -name nodemanager -nodes abc.sj.us -action start

Stop the ResourceManager Service

/opt/mapr/bin/maprcli node services -name resourcemanager -nodes abc.sj.us -action stop

Stop the ResourceManager Service

/opt/mapr/bin/maprcli node services -name resourcemanager -nodes abc.sj.us -action restart

Restart NFS server

/opt/mapr/bin/maprcli node services -nodes abc.sj.us -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.

/opt/mapr/bin/maprcli node services -filter ["csvc==nfs"] -nfs restart

Start the Hue Service

/opt/mapr/bin/maprcli node services -name hue -action start -nodes <node n>

Restart the hoststats service

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

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