def METHOD_NAME(data_source_name: Optional[str] = None,
                    resource_group_name: Optional[str] = None,
                    workspace_name: Optional[str] = None,
                    opts: Optional[pulumi.InvokeOptions] = None) -> AwaitableGetDataSourceResult:
    """
    Gets a datasource instance.
    :param str data_source_name: Name of the datasource
    :param str resource_group_name: The name of the resource group to get. The name is case insensitive.
    :param str workspace_name: Name of the Log Analytics Workspace that contains the datasource.
    """
    __args__ = dict()
    __args__['dataSourceName'] = data_source_name
    __args__['resourceGroupName'] = resource_group_name
    __args__['workspaceName'] = workspace_name
    opts = pulumi.InvokeOptions.merge(_utilities.get_invoke_opts_defaults(), opts)
    __ret__ = pulumi.runtime.invoke('azure-native:operationalinsights/v20151101preview:getDataSource', __args__, opts=opts, typ=GetDataSourceResult).value
    return AwaitableGetDataSourceResult(
        e_tag=pulumi.get(__ret__, 'e_tag'),
        id=pulumi.get(__ret__, 'id'),
        kind=pulumi.get(__ret__, 'kind'),
        name=pulumi.get(__ret__, 'name'),
        properties=pulumi.get(__ret__, 'properties'),
        tags=pulumi.get(__ret__, 'tags'),
        type=pulumi.get(__ret__, 'type'))