apiService

A service (such as HDFS, MapReduce, HBase) runs in a cluster. It has roles, which are the actual entities (NameNode, DataNodes, etc.) that perform the service's functions.

HDFS services and health checks

In CDH4, HDFS services may not present any health checks. This will happen if the service has more than one nameservice configured. In those cases, the health information will be available by fetching information about the nameservices instead.

The health summary is still available, and reflects a service-wide summary.

JSON

property	type	description
name	name (string)	The name of the service.
type	type (string)	The type of the service, e.g. HDFS, MAPREDUCE, HBASE.
clusterRef	clusterRef (apiClusterRef)	Readonly. A reference to the enclosing cluster.
serviceState	serviceState (apiServiceState)	Readonly. The configured run state of this service. Whether it's running, etc.
healthSummary	healthSummary (apiHealthSummary)	Readonly. The high-level health status of this service.
configStale	configStale (boolean)	Readonly. Expresses whether the service configuration is stale.
healthChecks	array of healthChecks (apiHealthCheck)	Readonly. The list of health checks of this service.
serviceUrl	serviceUrl (string)	Readonly. Link into the Cloudera Manager web UI for this specific service.