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mike_bronson7
mike_bronson7
Gold ⭐️⭐️⭐️
February 27, 2020
Solved

amari rest API + how to stop service on specific host

hi all

 

in ambari we have kafka service , and this service include 7 kafka brokers

 

how to stop/start the kafka broker on specific host?

 

in this example kafka service contain the following kafka broker hosts

 

kafka01

kafka02

kafka03

kafka04

kafka05

kafka06

kafka07

 

other repleted post - https://community.cloudera.com/t5/Support-Questions/how-to-identify-alert-from-kafka-service-in-ambari-by-REST/m-p/284675#M211372

 

Capture.PNG

    jsensharma
    jsensharmaAnswer
    Platinum ⭐️⭐️
    February 28, 2020

    @mike_bronson7 

    Error says :

    hostname=kafka01. Host not found

    So please check if the Hostname is correct (i means fully qualified hostnmae)

     

    Please compare it with the hostname listed in the following API call response. Just try to open this URL in the browser to see which hostname ambari is expecting:

    http://ambari_server_hostname:8080/api/v1/clusters/$CLUSTER_NAME/hosts/

    . 

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    4 replies

    jsensharma
    Platinum ⭐️⭐️
    jsensharma
    Platinum ⭐️⭐️
    February 27, 2020

    @mike_bronson7 

    Using API call Get the List of Hostnames where KAFKA_BROKERS are running:

    Example:

     

    # curl -iskH "X-Requested-By: ambari" -X GET -u admin:admin ttp://testnode1.example.com:8080/api/v1/clusters/NewCluster/services/KAFKA/components/KAFKA_BROKER?fields=host_components/HostRoles/hostname | grep host_name | awk -F ":" '{print $2}' | sed -e 's|["'\'']||g'

     testnode2.example.com
     testnode3.example.com
     testnode5.example.com

     

     

    The API call to Start Kafka Broker on Node "testnode2.example.com" can be achieved as following:

     

    # curl -iskH "X-Requested-By: ambari" -u admin:admin -X PUT -d '{"RequestInfo":{"context":"Start Kafka Broker","operation_level":{"level":"HOST_COMPONENT","cluster_name":"NewCluster","host_name":"testnode2.example.com","service_name":"KAFKA"}},"Body":{"HostRoles":{"state":"STARTED"}}}'  ttp://testnode1.example.com:8080/api/v1/clusters/NewCluster/hosts/testnode2.example.com/host_components/KAFKA_BROKER

     


    The API call to Stop Kafka Broker on Node "testnode2.example.com" can be achieved as following:

     

     

    # curl -iskH "X-Requested-By: ambari" -u admin:admin -X PUT -d '{"RequestInfo":{"context":"Stop Kafka Broker","operation_level":{"level":"HOST_COMPONENT","cluster_name":"NewCluster","host_name":"testnode2.example.com","service_name":"KAFKA"}},"Body":{"HostRoles":{"state":"INSTALLED"}}}'  ttp://testnode1.example.com:8080/api/v1/clusters/NewCluster/hosts/testnode2.example.com/host_components/KAFKA_BROKER

    .

    .

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      mike_bronson7
      mike_bronson7Author
      Gold ⭐️⭐️⭐️
      February 28, 2020

      Dear Jay +1 for your excellent answer 

       

      I will test this API soon when I will come to office ,  I will update soon

       

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      Michael-Bronson
      mike_bronson7
      mike_bronson7Author
      Gold ⭐️⭐️⭐️
      February 28, 2020

      Dear Jay

       

      when we run the API we get the following

       

      master02 - is the machine with ambari server

      kafka01 - is the first kafka machine 

       

      where we are wrong ?

       

       

      curl -iskH "X-Requested-By: ambari" -u admin:admin -X PUT -d '{"RequestInfo":{"context":"Stop Kafka Broker","operation_level":{"level":"HOST_COMPONENT","cluster_name":"NwCluster","host_name":"kafka01","service_name":"KAFKA"}},"Body":{"HostRoles":{"state":"INSTALLED"}}}' http://master02:8080/api/v1/clusters/HDP_SYS76/hosts/kafka01/host_components/KAFKA_BROKER
      HTTP/1.1 404 Not Found
      X-Frame-Options: DENY
      X-XSS-Protection: 1; mode=block
      X-Content-Type-Options: nosniff
      Cache-Control: no-store
      Pragma: no-cache
      Set-Cookie: AMBARISESSIONID=15lniq8gcyggwudtsp5sd70fp;Path=/;HttpOnly
      Expires: Thu, 01 Jan 1970 00:00:00 GMT
      User: admin
      Content-Type: text/plain
      Content-Length: 243

      {
      "status" : 404,
      "message" : "org.apache.ambari.server.controller.spi.NoSuchParentResourceException: Parent Host resource doesn't exist. Host not found, cluster=HDP_SYS76, hostname=kafka01. Host not found, cluster=HDP_SYS76, hostname=kafka01"

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      Michael-Bronson
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