Use cURL to make an API call to change base URL repository for Ambari Blueprints deployment?

[#1]

I have successfully uploaded a blueprint to an Ambari server. I am trying now to configure default repositories for HDP installation in our classroom lab environment, as per instructions here:

https://cwiki.apache.org/confluence/display/AMBARI/Blueprints#Blueprints-Step4:SetupStackRepositorie...

I have created the a file, named HDPRepo.test, per the instructions.

The command I am using is based on what worked for the blueprint upload, but pointed at the repo URI per the instructions:

curl -u admin:admin -i -H 
"X-Requested-By: jedentest1" -X POST -d @HDPRepo.test 
http://node1:8080/api/v1/stacks/HDP/versions/2.3/operating_systems/redhat6/repositories/HDP-2.3/

I can't find this demo'd anywhere on the web, so I'm flying a bit blind. The error being returned is: { "status" : 500, "message" : "Cannot create repositories."} My suspicion is that the documentation is missing some minor piece (possibly a cURL add-on, or perhaps the API URI isn't quite right) that makes this update of the base_url value work. Has anyone actually done this that can point out what I need to modify in my command? Thanks!

[#2]

UPDATE: I finally ran across this issue, which at least explains why the process is not working:

https://issues.apache.org/jira/browse/AMBARI-12811

The question now, then, becomes "How do I update the repo_version table prior to a blueprint-based installation?"

[#3]

And remember, I am writing a publicly available training course, so please, no answers that require hacking that you would not suggest the average administrator to attempt. 🙂

[#4 · Accepted solution]

You are using a POST-request, I think that is the reason why its not working, try PUT. I usually follow these steps when I install my cluster with blueprints

1.Upload blueprint

2.Update repositories

3.Create cluster (upload host mapping)

To update the repositories you can use the following commands.

HDP Utils:

curl -H "X-Requested-By: ambari" -X PUT -u admin:<PASSWORD> http://c6601.ambari.apache.org:8080/api/v1/stacks/HDP/versions/2.2/operating_systems/redhat6/reposit... -d @repo_payload

Payload

{
	"Repositories": {
		"base_url": "http://c6601.ambari.apache.org/HDP-UTILS-1.1.0.20/repos/centos6",
		"verify_base_url": true
	}
}

HDP:

curl -H "X-Requested-By: ambari" -X PUT -u admin:<PASSWORD> http://c6601.ambari.apache.org:8080/api/v1/stacks/HDP/versions/2.2/operating_systems/redhat6/reposit... -d @repo_payload

Payload

{
	"Repositories": {
		"base_url": "http://c6601.ambari.apache.org/HDP/centos6/2.x/updates/2.2.4.2",
		"verify_base_url": true
	}
}

[#5]

That was it! Thanks Jonas!