Fiware stack iotagent,Orion context broker compatibility with AWS DocumentDB instead of mongoDB

Question

Can anybody confirm the AWS DocumentDB compatibility with Fiware GE's like iotagent,Orion context broker. Is fiware stack fully working with DocumentDB. Looking for a suggestions and things to be consider before attempting it.

Thanks ONR

Answer 1

Since AWS DocumentDB only supports a subset of MongoDB, there is definitely going to be some incompatibility.

Take for example geoqueries:

curl -G -X GET \
  'http://localhost:1026/v2/entities' \
  -d 'type=Store' \
  -d 'georel=near;maxDistance:1500' \
  -d 'geometry=point' \
  -d 'coords=52.5162,13.3777'

Internally these rely on the MongoDB geospatial operations which are not currently supported: https://docs.aws.amazon.com/documentdb/latest/developerguide/mongo-apis.html#mongo-apis-geospatial

In my understanding, the IoT Agents are just using Mongo-DB as a simple memory store for mapping data so would not have any issues.