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Documentation Grafana Alloy Reference Components loki loki.source.azure_event_hubs

loki.source.azure_event_hubs

loki.source.azure_event_hubs receives Azure Event Hubs messages by making use of an Apache Kafka endpoint on Event Hubs. For more information, see the Azure Event Hubs documentation.

To learn more about streaming Azure logs to an Azure Event Hubs, refer to Microsoft’s tutorial on how to Stream Azure Active Directory logs to an Azure event hub.

Note that an Apache Kafka endpoint is not available within the Basic pricing plan. For more information, see the Event Hubs pricing page.

Multiple loki.source.azure_event_hubs components can be specified by giving them different labels.

Usage

alloy Copy

loki.source.azure_event_hubs "LABEL" {
	fully_qualified_namespace = "HOST:PORT"
	event_hubs                = EVENT_HUB_LIST
	forward_to                = RECEIVER_LIST

	authentication {
		mechanism = "AUTHENTICATION_MECHANISM"
	}
}

Arguments

loki.source.azure_event_hubs supports the following arguments:

The fully_qualified_namespace argument must refer to a full HOST:PORT that points to your event hub, such as NAMESPACE.servicebus.windows.net:9093. The assignor argument must be set to one of "range", "roundrobin", or "sticky".

The relabel_rules field can make use of the rules export value from a loki.relabel component to apply one or more relabeling rules to log entries before they’re forwarded to the list of receivers in forward_to.

Labels

The labels map is applied to every message that the component reads.

The following internal labels prefixed with __ are available but are discarded if not relabeled:

• __meta_kafka_message_key
• __meta_kafka_topic
• __meta_kafka_partition
• __meta_kafka_member_id
• __meta_kafka_group_id
• __azure_event_hubs_category

Blocks

The following blocks are supported inside the definition of loki.source.azure_event_hubs:

authentication block

The authentication block defines the authentication method when communicating with Azure Event Hub.

mechanism supports the values "connection_string" and "oauth". If "connection_string" is used, you must set the connection_string attribute. If "oauth" is used, you must configure one of the supported credential types as documented here: https://github.com/Azure/azure-sdk-for-go/blob/main/sdk/azidentity/README.md#credential-types via environment variables or Azure CLI.

Exported fields

loki.source.azure_event_hubs doesn’t export any fields.

Component health

loki.source.azure_event_hubs is only reported as unhealthy if given an invalid configuration.

Debug information

loki.source.azure_event_hubs doesn’t expose additional debug info.

Example

This example consumes messages from Azure Event Hub and uses OAuth to authenticate itself.

alloy Copy

loki.source.azure_event_hubs "example" {
	fully_qualified_namespace = "my-ns.servicebus.windows.net:9093"
	event_hubs                = ["gw-logs"]
	forward_to                = [loki.write.example.receiver]

	authentication {
		mechanism = "oauth"
	}
}

loki.write "example" {
	endpoint {
		url = "loki:3100/api/v1/push"
	}
}

Compatible components

loki.source.azure_event_hubs can accept arguments from the following components:

• Components that export Loki LogsReceiver