[SQL Server] 'SQLServer' object has no attribute 'check_id'

[andrewwillans]

We are attempting to set up on in one of our data centres on windows server core, unfortunately when starting the service we get this error:

2018-05-10 14:55:03 GMT | ERROR | (datadog_agent.go:133 in LogMessage) | (sqlserver.py:154) | INitialization exception 'SQLServer' object has no attribute 'check_id'
Traceback (most recent call last):
File "C:\Program Files\Datadog\Datadog Agent\embedded\lib\site-packages\datadog_checks\sqlserver\sqlserver.py", line 132, in init
with self.open_managed_db_connections(instance, None, db_name=self.DEFAULT_DATABASE):
File "C:\Program Files\Datadog\Datadog Agent\embedded\lib\contextlib.py", line 17, in enter
return self.gen.next()
File "C:\Program Files\Datadog\Datadog Agent\embedded\lib\site-packages\datadog_checks\sqlserver\sqlserver.py", line 570, in open_managed_db_connections
self.open_db_connections(instance, db_key, db_name)
File "C:\Program Files\Datadog\Datadog Agent\embedded\lib\site-packages\datadog_checks\sqlserver\sqlserver.py", line 622, in open_db_connections
tags=service_check_tags, message=message)
File "C:\Program Files\Datadog\Datadog Agent\bin\agent\dist\checks_init_.py", line 199, in service_check
aggregator.submit_service_check(self, self.check_id, name, status, tags, hostname, message)
AttributeError: 'SQLServer' object has no attribute 'check_id'

Here is the contents of the YAML for sql server

init_config:

instances:
- host: 127.0.0.1, 1433
connector: odbc
username: datadog
password: ****
tags:
- optional_tag

Can you see anything we’re obviously doing wrong?
The datadog user can connect just fine to the host using sqlcmd.