@aman mittal
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What the actual curl command will look like depends on whether your NiFi target is secured or not and how it has been secured. I am not completely clear on what you mean by "executing the process group".
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Here is an example curl command that can be used to create or update a key/value variable on an existing process group. This example assumes the NiFi has been secured and authorization is via LDAP.
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# Obtain a user authentication token:
token=$(curl -k 'https://<hostname>:<port>/nifi-api/access/token' --data 'username=<username>&password=<password>’)
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#Get current process group variable-registry details:
curl -k 'https://<hostname>:<port>/nifi-api/process-groups/<process group uuid>/variable-registry' -H "Authorization: Bearer $token"
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#create or update a variable on a specific process group:
curl -k 'https://<hostname>:<port>/nifi-api/process-groups/<process group uuid>/variable-registry/update-requests' -H "Authorization: Bearer $token" -H 'Content-Type: application/json' --data-binary '{"processGroupRevision":{"clientId":"<client id from above response>","version":2},"variableRegistry":{"processGroupId":"<process group uuid>","variables":[{"variable":{"name":"new-pg-var","value":"testing1234"}}]}}' --compressed-
Note: If you Target Nifi is unsecured you will not need to worry about authentication or authorization. So above command would not require "-k" or "-H "Authorization: Bearer $token". The URL in that case would also be http instead of https.
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Thank you,
Matt
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