question Re: How to remove Falcon service from Ambari? in Support Questions

How to remove Falcon service from Ambari?

bandarusridhar1 — Thu, 14 Apr 2016 00:39:13 GMT

Hi Team,

Can anyone please provide me steps to remove Falcon service using Ambari or CLI?

Re: How to remove Falcon service from Ambari?

emaxwell — Thu, 14 Apr 2016 00:39:47 GMT

You can delete a service with the REST API through ambari. You will need to stop the service first, then use the following command:

curl -u admin:admin -i -H 'X-Requested-By: ambari' -X DELETE http://sandbox.hortonworks.com:8080/api/v1/clusters/Sandbox/services/FALCON

Re: How to remove Falcon service from Ambari?

bandarusridhar1 — Thu, 14 Apr 2016 00:48:05 GMT

Its throwing error:

HTTP/1.1 405 Http method DELETE is not supported by this URL

Re: How to remove Falcon service from Ambari?

sayankh — Thu, 14 Apr 2016 13:22:00 GMT

@Sridhar Bandaru

It would be a good idea to create a backup of the Ambari database before proceeding.

http://docs.hortonworks.com/HDPDocuments/Ambari-2.1.2.0/bk_ambari_reference_guide/content/_back_up_current_data.html

Please check the response you are getting when you run the below command.

# curl -u admin:admin -i -H 'X-Requested-By: ambari' -X GET http://sandbox.hortonworks.com:8080/api/v1/clusters/Sandbox/services/FALCON

Re: How to remove Falcon service from Ambari?

Jagatheeshr — Thu, 14 Apr 2016 18:13:59 GMT

@Sridhar Bandaru

Try the below template,

curl -H "X-Requested-By:ambari" -u admin:<Ambari_Password> DELETE \ http://<Ambari_Host>:Port>/api/v1/clusters/<Cluster_Name>/hosts/<Host_Name_Where_FALCON_Installed>/host_components/FALCON_SERVER

Eg,

curl -H "X-Requested-By:ambari" -u admin:admin -X DELETE http://sandbox1.demo.sas.com:8080/api/v1/clusters/sandbox/hosts/sandbox1.demo.sas.com/host_components/FALCON_SERVER

The above command doesn’t give any output.

so to confirm , run the same command again and it shows that the component doesn’t exist as below.

{ "status" : 404, "message" : "org.apache.ambari.server.controller.spi.NoSuchResourceException: The specified resource doesn't exist: ServiceComponentHost not found, clusterName=splsandbox, serviceName=FALCON, serviceComponentName=FALCON_SERVER, hostName=splsandbox1.demo.sas.com" }

Hope this helps