global_request_id is not set in the req.environ

If I pass 'X-Openstack-Request-Id' in the request headers, RequestId oslo.middleware should set 'openstack.global_request_id' in the req.environ but it's not setting it correctly as it's getting 'HTTP_X_OPENSTACK_REQUEST_ID' in the request header instead of 'X-Openstack-Request-Id' due to which global_request_id is not logged in the nova-api service log file.

$curl -g -i -X GET http://172.16.114.130/compute/v2.1/servers/detail -H "Accept: application/json" -H "OpenStack-API-Version: compute 2.67" -H "User-Agent: python-novaclient" -H "X-Auth-Token: gAAAAABb2mTlsGotppBZn5JLLNHz0PqKObqOQPM6KioPpmbi2lfxM4h_PRn7W45RBjwDlfMRjCOu0DR9ogevlc9QORAq7eiG7HNy0MXiQa42lEtUBtlKtKl7VEHl8ZKd7TVMW-aDYb2DcEMxaXV2AesEzHNV9YWcvUMs4bN6f_j2OYw_VAQb07I" -H "X-OpenStack-Nova-API-Version: 2.67" -H "X-Openstack-Request-Id: e19f8f4f-40e7-441e-b776-7b43ed15c7dd"

Request headers
{
       .....
      'HTTP_X_AUTH_TOKEN':'gAAAAABb2mTlsGotppBZn5JLLNHz0PqKObqOQPM6KioPpmbi2lfxM4h_PRn7W45RBjwDlfMRjCOu0DR9ogevlc9QORAq7eiG7HNy0MXiQa42lEtUBtlKtKl7VEHl8ZKd7TVMW-aDYb2DcEMxaXV2AesEzHNV9YWcvUMs4bN6f_j2OYw_VAQb07I',
      'HTTP_USER_AGENT':'python-novaclient',
      'HTTP_X_OPENSTACK_NOVA_API_VERSION':'2.67',
      'HTTP_X_OPENSTACK_REQUEST_ID':'e19f8f4f-40e7-441e-b776-7b43ed15c7dd',
      'nova.best_content_type':'application/json'
   }
}

I have observed same issue with placement-api service. Both of these services uses webob framework.

I wrote a simple webob application [1] to check whether it adds prefix HTTP and converts it to uppercase or not and observed that webob is a culprit.

Not all OpenStack services uses webob framework. Flask doesn't modify HTTP headers. Maybe, we will need to modify RequestId middleware to handle both 'HTTP_X_OPENSTACK_REQUEST_ID' and 'X-Openstack-Request-Id' cases.

[1] : http://paste.openstack.org/show/733748/