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YARN-9792. Document examples of SchedulerConf with Node Labels. Contributed by Prabhu Joseph

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Sunil G 2019-10-02 23:43:47 +05:30
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hadoop-yarn-project/hadoop-yarn/hadoop-yarn-site/src/site/markdown/ResourceManagerRest.md
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@ -5292,6 +5292,87 @@ Response Header:
Content-Type: application/xml
Transfer-Encoding: chunked
**Adding Node Labels to a queue**
Assuming we are using the capacity scheduler and the current queue configuration is two queues root.default, and root.a, this example adds a Node Label x to the queue root.a. Create a Node Label x and assign the nodes with below commands.
```yarn rmadmin -addToClusterNodeLabels "x(exclusive=true)"```
```yarn rmadmin -replaceLabelsOnNode "<nodeId>=x"```
HTTP Request:
```xml
Accept: application/xml
PUT http://rm-http-address:port/ws/v1/cluster/scheduler-conf
Content-Type: application/xml
<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
<sched-conf>
<update-queue>
<queue-name>root.a</queue-name>
<params>
<entry>
<key>accessible-node-labels</key>
<value>x</value>
</entry>
<entry>
<key>accessible-node-labels.x.capacity</key>
<value>100</value>
</entry>
</params>
</update-queue>
<update-queue>
<queue-name>root</queue-name>
<params>
<entry>
<key>accessible-node-labels.x.capacity</key>
<value>100</value>
</entry>
</params>
</update-queue>
</sched-conf>
```
Response Header:
HTTP/1.1 200 OK
Content-Type: application/xml
Transfer-Encoding: chunked
**Removing Node Labels from a queue**
Assuming we are using the capacity scheduler and the current queue configuration is two queues root.default, and root.a and Node Label x is assigned to queue root.a. This example unsets the Node Label x from the queue root.a and removes it.
HTTP Request:
```xml
Accept: application/xml
PUT http://rm-http-address:port/ws/v1/cluster/scheduler-conf
Content-Type: application/xml
<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
<sched-conf>
<update-queue>
<queue-name>root.a</queue-name>
<params>
<entry>
<key>accessible-node-labels</key>
<value></value>
</entry>
</params>
</update-queue>
</sched-conf>
```
Response Header:
HTTP/1.1 200 OK
Content-Type: application/xml
Transfer-Encoding: chunked
```yarn rmadmin -removeFromClusterNodeLabels x```
Cluster Container Signal API
--------------------------------