Kafka Upstream Configuration

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Configuration

This plugin is compatible with DB-less mode.

Compatible protocols

The Kafka Upstream plugin is compatible with the following protocols:

grpc, grpcs, http, https

Parameters

Here's a list of all the parameters which can be used in this plugin's configuration:

• name or plugin

  string required

  The name of the plugin, in this case kafka-upstream.

  • If using the Kong Admin API, Konnect API, declarative configuration, or decK files, the field is name.
  • If using the KongPlugin object in Kubernetes, the field is plugin.

• instance_name

  string

  An optional custom name to identify an instance of the plugin, for example kafka-upstream_my-service.

  The instance name shows up in Kong Manager and in Konnect, so it's useful when running the same plugin in multiple contexts, for example, on multiple services. You can also use it to access a specific plugin instance via the Kong Admin API.

  An instance name must be unique within the following context:

  • Within a workspace for Kong Gateway Enterprise
  • Within a control plane or control plane group for Konnect
  • Globally for Kong Gateway (OSS)

• service.name or service.id

  string

  The name or ID of the service the plugin targets. Set one of these parameters if adding the plugin to a service through the top-level /plugins endpoint. Not required if using /services/{serviceName|Id}/plugins.

• route.name or route.id

  string

  The name or ID of the route the plugin targets. Set one of these parameters if adding the plugin to a route through the top-level /plugins endpoint. Not required if using /routes/{routeName|Id}/plugins.

• consumer.name or consumer.id

  string

  The name or ID of the consumer the plugin targets. Set one of these parameters if adding the plugin to a consumer through the top-level /plugins endpoint. Not required if using /consumers/{consumerName|Id}/plugins.

• enabled

  boolean default: true

  Whether this plugin will be applied.

• config

  record required
  • bootstrap_servers

    set of type record

    Set of bootstrap brokers in a {host: host, port: port} list format.

    • host

      string required

      A string representing a host name, such as example.com.

    • port

      integer required between: 0 65535

      An integer representing a port number between 0 and 65535, inclusive.

  • topic

    string required

    The Kafka topic to publish to.

  • timeout

    integer default: 10000

    Socket timeout in milliseconds.

  • keepalive

    integer default: 60000

    Keepalive timeout in milliseconds.

  • keepalive_enabled

    boolean default: false

  • authentication

    record required
    • strategy

      string Must be one of: sasl

      The authentication strategy for the plugin, the only option for the value is sasl.

    • mechanism

      string Must be one of: PLAIN, SCRAM-SHA-256, SCRAM-SHA-512

      The SASL authentication mechanism. Supported options: PLAIN, SCRAM-SHA-256, or SCRAM-SHA-512.

    • tokenauth

      boolean

      Enable this to indicate DelegationToken authentication.

    • user

      string referenceable encrypted

      Username for SASL authentication.

    • password

      string referenceable encrypted

      Password for SASL authentication.

  • security

    record required
    • certificate_id

      string

      UUID of certificate entity for mTLS authentication.

    • ssl

      boolean

      Enables TLS.

  • forward_method

    boolean default: false

    Include the request method in the message. At least one of these must be true: forward_method, forward_uri, forward_headers, forward_body.

  • forward_uri

    boolean default: false

    Include the request URI and URI arguments (as in, query arguments) in the message. At least one of these must be true: forward_method, forward_uri, forward_headers, forward_body.

  • forward_headers

    boolean default: false

    Include the request headers in the message. At least one of these must be true: forward_method, forward_uri, forward_headers, forward_body.

  • forward_body

    boolean default: true

    Include the request body in the message. At least one of these must be true: forward_method, forward_uri, forward_headers, forward_body.

  • cluster_name

    string

    An identifier for the Kafka cluster. By default, this field generates a random string. You can also set your own custom cluster identifier. If more than one Kafka plugin is configured without a cluster_name (that is, if the default autogenerated value is removed), these plugins will use the same producer, and by extension, the same cluster. Logs will be sent to the leader of the cluster.

  • producer_request_acks

    integer default: 1 Must be one of: -1, 0, 1

    The number of acknowledgments the producer requires the leader to have received before considering a request complete. Allowed values: 0 for no acknowledgments; 1 for only the leader; and -1 for the full ISR (In-Sync Replica set).

  • producer_request_timeout

    integer default: 2000

    Time to wait for a Produce response in milliseconds.

  • producer_request_limits_messages_per_request

    integer default: 200

    Maximum number of messages to include into a single producer request.

  • producer_request_limits_bytes_per_request

    integer default: 1048576

    Maximum size of a Produce request in bytes.

  • producer_request_retries_max_attempts

    integer default: 10

    Maximum number of retry attempts per single Produce request.

  • producer_request_retries_backoff_timeout

    integer default: 100

    Backoff interval between retry attempts in milliseconds.

  • producer_async

    boolean default: true

    Flag to enable asynchronous mode.

  • producer_async_flush_timeout

    integer default: 1000

    Maximum time interval in milliseconds between buffer flushes in asynchronous mode.

  • producer_async_buffering_limits_messages_in_memory

    integer default: 50000

    Maximum number of messages that can be buffered in memory in asynchronous mode.