The Forward Protocol channel transports Fluentd event streams from upstream forwarders or agents to a downstream Fluentd aggregator. Messages are serialized as MessagePack arrays and sent over a persistent TCP connection.
Forward one or more log events to a Fluentd aggregator
Messages
MessageMode
A single log event with tag, timestamp, and record
Content-Type: application/msgpack
ForwardMode
A batch of log events sharing a single tag
Content-Type: application/msgpack
PackedForwardMode
A batch of pre-serialized log events as a raw MessagePack byte stream
Content-Type: application/msgpack
CompressedPackedForwardMode
A gzip-compressed packed forward batch
Content-Type: application/msgpack
About AsyncAPI
The AsyncAPI specification describes event-driven APIs the way OpenAPI describes request/response APIs. A channel is the named pipe — a webhook URL, a Kafka topic, a WebSocket route, an MQTT subject — that producers and consumers publish or subscribe to. Each channel carries one or more messages with structured payloads, and an operation declares whether a given party sends or receives on that channel.
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