There are several ways how to configure connections for the library. Easiest option, and most useful, is to just define one default connection that will be used every time an API call is made without explicitly passing in other connection.

When using elasticsearch_dsl it is highly recommended to use the attached serializer (elasticsearch_dsl.serializer.serializer) that will make sure your objects are correctly serialized into json every time. The create_connection method that is described here (and that configure method uses under the hood) will do that automatically for you, unless you explicitly specify your own serializer. The serializer we use will also allow you to serialize your own objects - just define a to_dict() method on your objects and it will automatically be called when serializing to json.


Unless you want to access multiple clusters from your application it is highly recommended that you use the create_connection method and all operations will use that connection automatically.


If you don’t wish to supply global configuration you can always pass in your own connection (instance of elasticsearch.Elasticsearch) as parameter using wherever it is accepted:

s = Search(using=Elasticsearch('localhost'))

You can even use this approach to override any connection the object might be already associated with:

s = s.using(Elasticsearch('otherhost:9200'))

Default connection

To define a default connection that will be used globally, use the connections module and the create_connection method:

from elasticsearch_dsl import connections

connections.create_connection(hosts=['localhost'], timeout=20)

Any keyword arguments (hosts and timeout in our example) will be passed to the Elasticsearch class from elasticsearch-py. To see all the possible configuration options see the documentation.

Multiple clusters

You can define multiple connections to multiple clusters, either at the same time using the configure method:

from elasticsearch_dsl import connections

    default={'hosts': 'localhost'},
        'hosts': [''],
        'sniff_on_start': True

Such connections will be constructed lazily when requested for the first time.

Or just add them one by one:

# if you have configuration to be passed to Elasticsearch.__init__
connections.create_connection('qa', hosts=[''], sniff_on_start=True)

# if you already have an Elasticsearch instance ready
connections.add_connection('qa', my_client)

Using aliases

When using multiple connections you can just refer to them using the string alias you registered them under:

s = Search(using='qa')

KeyError will be raised if there is no connection registered under that alias.