NodeManager REST API’s

Overview

The NodeManager REST API’s allow the user to get status on the node and information about applications and containers running on that node.

Enabling CORS support

To enable cross-origin support (CORS) for the NM only(without enabling it for the RM), please set the following configuration parameters:

In core-site.xml, add org.apache.hadoop.security.HttpCrossOriginFilterInitializer to hadoop.http.filter.initializers. In yarn-site.xml, set yarn.nodemanager.webapp.cross-origin.enabled to true.

NodeManager Information API

The node information resource provides overall information about that particular node.

URI

Both of the following URI’s give you the cluster information.

  * http://<nm http address:port>/ws/v1/node
  * http://<nm http address:port>/ws/v1/node/info

HTTP Operations Supported

  * GET

Query Parameters Supported

  None

Elements of the nodeInfo object

Properties Data Type Description
id long The NodeManager id
nodeHostName string The host name of the NodeManager
totalPmemAllocatedContainersMB long The amount of physical memory allocated for use by containers in MB
totalVmemAllocatedContainersMB long The amount of virtual memory allocated for use by containers in MB
totalVCoresAllocatedContainers long The number of virtual cores allocated for use by containers
vmemCheckEnabled boolean Whether virtual memory checking is enabled for preemption
pmemCheckEnabled boolean Whether physical memory checking is enabled for preemption
lastNodeUpdateTime long The last timestamp at which the health report was received (in ms since epoch)
nmStartupTime long The timestamp at which the node was started (in ms since epoch)
healthReport string The diagnostic health report of the node
nodeHealthy boolean true/false indicator of if the node is healthy
nodeManagerVersion string Version of the NodeManager
nodeManagerBuildVersion string NodeManager build string with build version, user, and checksum
nodeManagerVersionBuiltOn string Timestamp when NodeManager was built(in ms since epoch)
hadoopVersion string Version of hadoop common
hadoopBuildVersion string Hadoop common build string with build version, user, and checksum
hadoopVersionBuiltOn string Timestamp when hadoop common was built(in ms since epoch)

Response Examples

JSON response

HTTP Request:

  GET http://<nm http address:port>/ws/v1/node/info

Response Header:

  HTTP/1.1 200 OK
  Content-Type: application/json
  Transfer-Encoding: chunked
  Server: Jetty(6.1.26)

Response Body:

{
  "nodeInfo": {
    "healthReport": "",
    "totalVmemAllocatedContainersMB": 17203,
    "totalPmemAllocatedContainersMB": 8192,
    "totalVCoresAllocatedContainers": 8,
    "vmemCheckEnabled": false,
    "pmemCheckEnabled": true,
    "lastNodeUpdateTime": 1485814574224,
    "nodeHealthy": true,
    "nodeManagerVersion": "3.0.0",
    "nodeManagerBuildVersion": "3.0.0",
    "nodeManagerVersionBuiltOn": "2017-01-30T17:42Z",
    "hadoopVersion": "3.0.0",
    "hadoopBuildVersion": "3.0.0",
    "hadoopVersionBuiltOn": "2017-01-30T17:39Z",
    "id": "host.domain.com:46077",
    "nodeHostName": "host.domain.com",
    "nmStartupTime": 1485800887841
  }
}

XML response

HTTP Request:

  Accept: application/xml
  GET http://<nm http address:port>/ws/v1/node/info

Response Header:

  HTTP/1.1 200 OK
  Content-Type: application/xml
  Content-Length: 983
  Server: Jetty(6.1.26)

Response Body:

<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
<nodeInfo>
    <healthReport></healthReport>
    <totalVmemAllocatedContainersMB>17203</totalVmemAllocatedContainersMB>
    <totalPmemAllocatedContainersMB>8192</totalPmemAllocatedContainersMB>
    <totalVCoresAllocatedContainers>8</totalVCoresAllocatedContainers>
    <vmemCheckEnabled>false</vmemCheckEnabled>
    <pmemCheckEnabled>true</pmemCheckEnabled>
    <lastNodeUpdateTime>1485815774203</lastNodeUpdateTime>
    <nodeHealthy>true</nodeHealthy>
    <nodeManagerVersion>3.0.0</nodeManagerVersion>
    <nodeManagerBuildVersion>3.0.0</nodeManagerBuildVersion>
    <nodeManagerVersionBuiltOn>2017-01-30T17:42Z</nodeManagerVersionBuiltOn>
    <hadoopVersion>3.0.0</hadoopVersion>
    <hadoopBuildVersion>3.0.0</hadoopBuildVersion>
    <hadoopVersionBuiltOn>2017-01-30T17:39Z</hadoopVersionBuiltOn>
    <id>host.domain.com:46077</id>
    <nodeHostName>host.domain.com</nodeHostName>
    <nmStartupTime>1485800887841</nmStartupTime>
</nodeInfo>

Applications API

With the Applications API, you can obtain a collection of resources, each of which represents an application. When you run a GET operation on this resource, you obtain a collection of Application Objects. See also Application API for syntax of the application object.

URI

  * http://<nm http address:port>/ws/v1/node/apps

HTTP Operations Supported

  * GET

Query Parameters Supported

Multiple parameters can be specified.

  * state - application state 
  * user - user name

Elements of the apps (Applications) object

When you make a request for the list of applications, the information will be returned as a collection of app objects. See also Application API for syntax of the app object.

Properties Data Type Description
app array of app objects(JSON)/zero or more app objects(XML) A collection of application objects

Response Examples

JSON response

HTTP Request:

  GET http://<nm http address:port>/ws/v1/node/apps

Response Header:

  HTTP/1.1 200 OK
  Content-Type: application/json
  Transfer-Encoding: chunked
  Server: Jetty(6.1.26)

Response Body:

{
   "apps" : {
      "app" : [
         {
            "containerids" : [
               "container_1326121700862_0003_01_000001",
               "container_1326121700862_0003_01_000002"
            ],
            "user" : "user1",
            "id" : "application_1326121700862_0003",
            "state" : "RUNNING"
         },
         {
            "user" : "user1",
            "id" : "application_1326121700862_0002",
            "state" : "FINISHED"
         }
      ]
   }
}

XML response

HTTP Request:

  GET http://<nm http address:port>/ws/v1/node/apps
  Accept: application/xml

Response Header:

  HTTP/1.1 200 OK
  Content-Type: application/xml
  Content-Length: 400
  Server: Jetty(6.1.26)

Response Body:

<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
<apps>
  <app>
    <id>application_1326121700862_0002</id>
    <state>FINISHED</state>
    <user>user1</user>
  </app>
  <app>
    <id>application_1326121700862_0003</id>
    <state>RUNNING</state>
    <user>user1</user>
    <containerids>container_1326121700862_0003_01_000002</containerids>
    <containerids>container_1326121700862_0003_01_000001</containerids>
  </app>
</apps>

Application API

An application resource contains information about a particular application that was run or is running on this NodeManager.

URI

Use the following URI to obtain an app Object, for a application identified by the appid value.

  * http://<nm http address:port>/ws/v1/node/apps/{appid}

HTTP Operations Supported

  * GET

Query Parameters Supported

  None

Elements of the app (Application) object

Properties Data Type Description
id string The application id
user string The user who started the application
state string The state of the application - valid states are: NEW, INITING, RUNNING, FINISHING_CONTAINERS_WAIT, APPLICATION_RESOURCES_CLEANINGUP, FINISHED
containerids array of containerids(JSON)/zero or more containerids(XML) The list of containerids currently being used by the application on this node. If not present then no containers are currently running for this application.

Response Examples

JSON response

HTTP Request:

  GET http://<nm http address:port>/ws/v1/node/apps/application_1326121700862_0005

Response Header:

  HTTP/1.1 200 OK
  Content-Type: application/json
  Transfer-Encoding: chunked
  Server: Jetty(6.1.26)

Response Body:

{
   "app" : {
      "containerids" : [
         "container_1326121700862_0005_01_000003",
         "container_1326121700862_0005_01_000001"
      ],
      "user" : "user1",
      "id" : "application_1326121700862_0005",
      "state" : "RUNNING"
   }
}

XML response

HTTP Request:

  GET http://<nm http address:port>/ws/v1/node/apps/application_1326121700862_0005
  Accept: application/xml

Response Header:

  HTTP/1.1 200 OK
  Content-Type: application/xml
  Content-Length: 281 
  Server: Jetty(6.1.26)

Response Body:

<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
<app>
  <id>application_1326121700862_0005</id>
  <state>RUNNING</state>
  <user>user1</user>
  <containerids>container_1326121700862_0005_01_000003</containerids>
  <containerids>container_1326121700862_0005_01_000001</containerids>
</app>

Containers API

With the containers API, you can obtain a collection of resources, each of which represents a container. When you run a GET operation on this resource, you obtain a collection of Container Objects. See also Container API for syntax of the container object.

URI

  * http://<nm http address:port>/ws/v1/node/containers

HTTP Operations Supported

  * GET

Query Parameters Supported

  None

Elements of the containers object

When you make a request for the list of containers, the information will be returned as collection of container objects. See also Container API for syntax of the container object.

Properties Data Type Description
containers array of container objects(JSON)/zero or more container objects(XML) A collection of container objects

Response Examples

JSON response

HTTP Request:

  GET http://<nm http address:port>/ws/v1/node/containers

Response Header:

  HTTP/1.1 200 OK
  Content-Type: application/json
  Transfer-Encoding: chunked
  Server: Jetty(6.1.26)

Response Body:

{
   "containers" : {
      "container" : [
         {
            "nodeId" : "host.domain.com:8041",
            "totalMemoryNeededMB" : 2048,
            "totalVCoresNeeded" : 1,
            "state" : "RUNNING",
            "diagnostics" : "",
            "containerLogsLink" : "http://host.domain.com:8042/node/containerlogs/container_1326121700862_0006_01_000001/user1",
            "user" : "user1",
            "id" : "container_1326121700862_0006_01_000001",
            "exitCode" : -1000,
            "executionType": "GUARANTEED",
            "containerLogFiles": [
              "stdout",
              "stderr",
              "syslog"
            ]
         },
         {
            "nodeId" : "host.domain.com:8041",
            "totalMemoryNeededMB" : 2048,
            "totalVCoresNeeded" : 2,
            "state" : "RUNNING",
            "diagnostics" : "",
            "containerLogsLink" : "http://host.domain.com:8042/node/containerlogs/container_1326121700862_0006_01_000003/user1",
            "user" : "user1",
            "id" : "container_1326121700862_0006_01_000003",
            "exitCode" : -1000,
            "executionType": "GUARANTEED",
            "containerLogFiles": [
              "stdout",
              "stderr",
              "syslog"
            ]
         }
      ]
   }
}

XML response

HTTP Request:

  GET http://<nm http address:port>/ws/v1/node/containers
  Accept: application/xml

Response Header:

  HTTP/1.1 200 OK
  Content-Type: application/xml
  Content-Length: 988
  Server: Jetty(6.1.26)

Response Body:

<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
<containers>
  <container>
    <id>container_1326121700862_0006_01_000001</id>
    <state>RUNNING</state>
    <exitCode>-1000</exitCode>
    <diagnostics/>
    <user>user1</user>
    <totalMemoryNeededMB>2048</totalMemoryNeededMB>
    <totalVCoresNeeded>1</totalVCoresNeeded>
    <containerLogsLink>http://host.domain.com:8042/node/containerlogs/container_1326121700862_0006_01_000001/user1</containerLogsLink>
    <nodeId>host.domain.com:8041</nodeId>
    <executionType>GUARANTEED</executionType>
    <containerLogFiles>stdout</containerLogFiles>
    <containerLogFiles>stderr</containerLogFiles>
    <containerLogFiles>syslog</containerLogFiles>
  </container>
  <container>
    <id>container_1326121700862_0006_01_000003</id>
    <state>DONE</state>
    <exitCode>0</exitCode>
    <diagnostics>Container killed by the ApplicationMaster.</diagnostics>
    <user>user1</user>
    <totalMemoryNeededMB>2048</totalMemoryNeededMB>
    <totalVCoresNeeded>2</totalVCoresNeeded>
    <containerLogsLink>http://host.domain.com:8042/node/containerlogs/container_1326121700862_0006_01_000003/user1</containerLogsLink>
    <nodeId>host.domain.com:8041</nodeId>
    <executionType>GUARANTEED</executionType>
    <containerLogFiles>stdout</containerLogFiles>
    <containerLogFiles>stderr</containerLogFiles>
    <containerLogFiles>syslog</containerLogFiles>
  </container>
</containers>

Container API

A container resource contains information about a particular container that is running on this NodeManager.

URI

Use the following URI to obtain a Container Object, from a container identified by the containerid value.

  * http://<nm http address:port>/ws/v1/node/containers/{containerid}

HTTP Operations Supported

  * GET

Query Parameters Supported

  None

Elements of the container object

Properties Data Type Description
id string The container id
state string State of the container - valid states are: NEW, LOCALIZING, LOCALIZATION_FAILED, LOCALIZED, RUNNING, EXITED_WITH_SUCCESS, EXITED_WITH_FAILURE, KILLING, CONTAINER_CLEANEDUP_AFTER_KILL, CONTAINER_RESOURCES_CLEANINGUP, DONE
nodeId string The id of the node the container is on
containerLogsLink string The http link to the container logs
user string The user name of the user which started the container
exitCode int Exit code of the container
diagnostics string A diagnostic message for failed containers
totalMemoryNeededMB long Total amout of memory needed by the container (in MB)
totalVCoresNeeded long Total number of virtual cores needed by the container
executionType string Container type of GUARANTEED or OPPORTUNISTIC
containerLogFiles array of strings Container log file names

Response Examples

JSON response

HTTP Request:

  GET http://<nm http address:port>/ws/v1/nodes/containers/container_1326121700862_0007_01_000001

Response Header:

  HTTP/1.1 200 OK
  Content-Type: application/json
  Transfer-Encoding: chunked
  Server: Jetty(6.1.26)

Response Body:

{
   "container" : {
      "nodeId" : "host.domain.com:8041",
      "totalMemoryNeededMB" : 2048,
      "totalVCoresNeeded" : 1,
      "state" : "RUNNING",
      "diagnostics" : "",
      "containerLogsLink" : "http://host.domain.com:8042/node/containerlogs/container_1326121700862_0007_01_000001/user1",
      "user" : "user1",
      "id" : "container_1326121700862_0007_01_000001",
      "exitCode" : -1000,
      "executionType": "GUARANTEED",
      "containerLogFiles": [
        "stdout",
        "stderr",
        "syslog"
      ]
   }
}

XML response

HTTP Request:

  GET http://<nm http address:port>/ws/v1/node/containers/container_1326121700862_0007_01_000001
  Accept: application/xml

Response Header:

  HTTP/1.1 200 OK
  Content-Type: application/xml
  Content-Length: 491 
  Server: Jetty(6.1.26)

Response Body:

<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
<container>
  <id>container_1326121700862_0007_01_000001</id>
  <state>RUNNING</state>
  <exitCode>-1000</exitCode>
  <diagnostics/>
  <user>user1</user>
  <totalMemoryNeededMB>2048</totalMemoryNeededMB>
  <totalVCoresNeeded>1</totalVCoresNeeded>
  <containerLogsLink>http://host.domain.com:8042/node/containerlogs/container_1326121700862_0007_01_000001/user1</containerLogsLink>
  <nodeId>host.domain.com:8041</nodeId>
  <executionType>GUARANTEED</executionType>
  <containerLogFiles>stdout</containerLogFiles>
  <containerLogFiles>stderr</containerLogFiles>
  <containerLogFiles>syslog</containerLogFiles>
</container>