ApiNameservice Data Model

Provides information about an HDFS nameservice.

Nameservices can be either a stand-alone NameNode, a NameNode paired with a SecondaryNameNode, or a high-availability pair formed by an active and a stand-by NameNode.

The following fields are only available in the object's full view:

  • healthSummary
  • healthChecks

Properties
name data type description
name string Name of the nameservice.
active ApiRoleRef Reference to the active NameNode.
activeFailoverController ApiRoleRef Reference to the active NameNode's failover controller, if configured.
standBy ApiRoleRef Reference to the stand-by NameNode.
standByFailoverController ApiRoleRef Reference to the stand-by NameNode's failover controller, if configured.
secondary ApiRoleRef Reference to the SecondaryNameNode.
mountPoints array of string Mount points assigned to this nameservice in a federation.
healthSummary ApiHealthSummary Requires "full" view. The high-level health status of this nameservice.
healthChecks array of ApiHealthCheck Requires "full" view. List of health checks performed on the nameservice.

Example

{
  "name" : "...",
  "active" : {
    "clusterName" : "...",
    "serviceName" : "...",
    "roleName" : "...",
    "healthSummary" : "GOOD",
    "roleStatus" : "BUSY"
  },
  "activeFailoverController" : {
    "clusterName" : "...",
    "serviceName" : "...",
    "roleName" : "...",
    "healthSummary" : "CONCERNING",
    "roleStatus" : "UNKNOWN"
  },
  "standBy" : {
    "clusterName" : "...",
    "serviceName" : "...",
    "roleName" : "...",
    "healthSummary" : "GOOD",
    "roleStatus" : "UNKNOWN"
  },
  "standByFailoverController" : {
    "clusterName" : "...",
    "serviceName" : "...",
    "roleName" : "...",
    "healthSummary" : "BAD",
    "roleStatus" : "STARTED"
  },
  "secondary" : {
    "clusterName" : "...",
    "serviceName" : "...",
    "roleName" : "...",
    "healthSummary" : "GOOD",
    "roleStatus" : "UNKNOWN"
  },
  "mountPoints" : [ "...", "..." ],
  "healthSummary" : "HISTORY_NOT_AVAILABLE",
  "healthChecks" : [ {
    "name" : "...",
    "summary" : "CONCERNING",
    "explanation" : "...",
    "suppressed" : true
  }, {
    "name" : "...",
    "summary" : "DISABLED",
    "explanation" : "...",
    "suppressed" : true
  } ]
}