Exclusive Route transform

Routes events from one or more streams to unique sub-streams based on a set of user-defined conditions.

Routes events from one or more streams to unique sub-streams based on a set of user-defined conditions. Routes are evaluated in order and once an event matches a route, it is sent exclusively to that route and no further routes are evaluated.

Also, see the Route transform for routing an event to multiple streams.

Configuration

Example configurations

{
  "transforms": {
    "my_transform_id": {
      "type": "exclusive_route",
      "inputs": [
        "my-source-or-transform-id"
      ],
      "routes": {
        "condition": null,
        "name": null
      }
    }
  }
}

[transforms.my_transform_id]
type = "exclusive_route"
inputs = [ "my-source-or-transform-id" ]

  [transforms.my_transform_id.routes]

transforms:
  my_transform_id:
    type: exclusive_route
    inputs:
      - my-source-or-transform-id
    routes:
      ? condition
      ? name

{
  "transforms": {
    "my_transform_id": {
      "type": "exclusive_route",
      "inputs": [
        "my-source-or-transform-id"
      ],
      "routes": {
        "condition": null,
        "name": null
      }
    }
  }
}

[transforms.my_transform_id]
type = "exclusive_route"
inputs = [ "my-source-or-transform-id" ]

  [transforms.my_transform_id.routes]

transforms:
  my_transform_id:
    type: exclusive_route
    inputs:
      - my-source-or-transform-id
    routes:
      ? condition
      ? name

graph

optional object

Extra graph configuration

Configure output for component when generated with graph command

graph.node_attributes

optional object

Node attributes to add to this component’s node in resulting graph

They are added to the node as provided

graph.node_attributes.*

required string literal

A single graph node attribute in graphviz DOT language.

Examples

{
  "color": "red",
  "name": "Example Node",
  "width": "5.0"
}

inputs

required [string]

A list of upstream source or transform IDs.

Wildcards (*) are supported.

See configuration for more info.

Array string literal

Examples

[
  "my-source-or-transform-id",
  "prefix-*"
]

routes

required [object]

An array of named routes. The route names are expected to be unique. Routes are evaluated in order from first to last, and only the first matching route receives each event (first-match-wins).

Array object

routes.condition

required condition

Each condition represents a filter which is applied to each event.

*.source

The text of the condition. The syntax of the condition depends on the value of type.

*.type

The type of condition to supply. See Available syntaxes below for a list of available types for this transform.

Available syntaxes

Syntax	Description	Example
`vrl`	A Vector Remap Language (VRL) Boolean expression.	`.status_code != 200 && !includes(["info", "debug"], .severity)`
`datadog_search`	A Datadog Search query string.	`*stack`
`is_log`	Whether the incoming event is a log.
`is_metric`	Whether the incoming event is a metric.
`is_trace`	Whether the incoming event is a trace.

Shorthand for VRL

If you opt for the vrl syntax for this condition, you can set the condition as a string via the condition parameter, without needing to specify both a source and a type. The table below shows some examples:

Config format	Example
YAML	`condition: .status == 200`
TOML	`condition = ".status == 200"`
JSON	`"condition": ".status == 200"`

Condition config examples

Standard VRL

*:
  type: "vrl"
  source: ".status == 500"

* = { type = "vrl", source = ".status == 500" }

"*": {
  "type": "vrl",
  "source": ".status == 500"
}

Datadog Search

*:
  type: "datadog_search"
  source: "*stack"

* = { type = "datadog_search", source = "*stack" }

"*": {
  "type": "datadog_search",
  "source": "*stack"
}

VRL shorthand

*: ".status == 500"

* = ".status == 500"

"*": ".status == 500"

routes.name

required string literal

The name of the route is also the name of the transform port.

The _unmatched name is reserved and thus cannot be used as route ID.

Each route can then be referenced as an input by other components with the name <transform_name>.<name>. If an event doesn’t match any route, it is sent to the <transform_name>._unmatched output.

Examples

[
  {
    "condition": {
      "source": "exists(.foo) \u0026\u0026 exists(.bar)",
      "type": "vrl"
    },
    "name": "foo-and-bar-exist"
  },
  {
    "condition": {
      "source": "exists(.foo)",
      "type": "vrl"
    },
    "name": "only-foo-exists"
  }
]

Input Types

The following table lists all telemetry data types supported by the component across possible configurations. Be aware that the available data types may differ based on the specified codec configuration.

Logs

Log events are supported.

Metrics

The following metrics are supported:

counter distribution gauge histogram set summary

Traces

Trace events are supported.

Outputs

<route_id>

Each route can be referenced as an input by other components with the name <transform_name>.<route_id>.

Output Types

Metrics

The input metric event.

Traces

The input trace event.

Logs

Warning

The fields shown below will be different if log namespacing is enabled. See Log Namespacing for more details

The input log event.

Telemetry

Metrics

link

component_discarded_events_total

counter

The number of events dropped by this component.

component_id

The Vector component ID.

component_kind

The Vector component kind.

component_type

The Vector component type.

host optional

The hostname of the system Vector is running on.

intentional

True if the events were discarded intentionally, like a filter transform, or false if due to an error.

pid optional

The process ID of the Vector instance.

component_errors_total

counter

The total number of errors encountered by this component.

component_id

The Vector component ID.

component_kind

The Vector component kind.

component_type

The Vector component type.

error_type

The type of the error

host optional

The hostname of the system Vector is running on.

pid optional

The process ID of the Vector instance.

stage

The stage within the component at which the error occurred.

component_received_event_bytes_total

counter

The number of event bytes accepted by this component either from tagged origins like file and uri, or cumulatively from other origins.

component_id

The Vector component ID.

component_kind

The Vector component kind.

component_type

The Vector component type.

container_name optional

The name of the container from which the data originated.

file optional

The file from which the data originated.

host optional

The hostname of the system Vector is running on.

mode optional

The connection mode used by the component.

peer_addr optional

The IP from which the data originated.

peer_path optional

The pathname from which the data originated.

pid optional

The process ID of the Vector instance.

pod_name optional

The name of the pod from which the data originated.

uri optional

The sanitized URI from which the data originated.

component_received_events_count

histogram

A histogram of the number of events passed in each internal batch in Vector’s internal topology.

Note that this is separate than sink-level batching. It is mostly useful for low level debugging performance issues in Vector due to small internal batches.

component_id

The Vector component ID.

component_kind

The Vector component kind.

component_type

The Vector component type.

container_name optional

The name of the container from which the data originated.

file optional

The file from which the data originated.

host optional

The hostname of the system Vector is running on.

mode optional

The connection mode used by the component.

peer_addr optional

The IP from which the data originated.

peer_path optional

The pathname from which the data originated.

pid optional

The process ID of the Vector instance.

pod_name optional

The name of the pod from which the data originated.

uri optional

The sanitized URI from which the data originated.

component_received_events_total

counter

The number of events accepted by this component either from tagged origins like file and uri, or cumulatively from other origins.

component_id

The Vector component ID.

component_kind

The Vector component kind.

component_type

The Vector component type.

container_name optional

The name of the container from which the data originated.

file optional

The file from which the data originated.

host optional

The hostname of the system Vector is running on.

mode optional

The connection mode used by the component.

peer_addr optional

The IP from which the data originated.

peer_path optional

The pathname from which the data originated.

pid optional

The process ID of the Vector instance.

pod_name optional

The name of the pod from which the data originated.

uri optional

The sanitized URI from which the data originated.

component_sent_event_bytes_total

counter

The total number of event bytes emitted by this component.

component_id

The Vector component ID.

component_kind

The Vector component kind.

component_type

The Vector component type.

host optional

The hostname of the system Vector is running on.

output optional

The specific output of the component.

pid optional

The process ID of the Vector instance.

component_sent_events_total

counter

The total number of events emitted by this component.

component_id

The Vector component ID.

component_kind

The Vector component kind.

component_type

The Vector component type.

host optional

The hostname of the system Vector is running on.

output optional

The specific output of the component.

pid optional

The process ID of the Vector instance.

transform_buffer_max_byte_size

gauge

The maximum number of bytes the buffer that feeds into a transform can hold.

component_id

The Vector component ID.

component_kind

The Vector component kind.

component_type

The Vector component type.

host optional

The hostname of the system Vector is running on.

output optional

The specific output of the component.

pid optional

The process ID of the Vector instance.

transform_buffer_max_event_size

gauge

The maximum number of events the buffer that feeds into a transform can hold.

component_id

The Vector component ID.

component_kind

The Vector component kind.

component_type

The Vector component type.

host optional

The hostname of the system Vector is running on.

output optional

The specific output of the component.

pid optional

The process ID of the Vector instance.

transform_buffer_utilization

histogram

The utilization level of the buffer that feeds into a transform.

component_id

The Vector component ID.

component_kind

The Vector component kind.

component_type

The Vector component type.

host optional

The hostname of the system Vector is running on.

output optional

The specific output of the component.

pid optional

The process ID of the Vector instance.

transform_buffer_utilization_level

gauge

The current utilization level of the buffer that feeds into a transform.

component_id

The Vector component ID.

component_kind

The Vector component kind.

component_type

The Vector component type.

host optional

The hostname of the system Vector is running on.

output optional

The specific output of the component.

pid optional

The process ID of the Vector instance.

utilization

gauge

A ratio from 0 to 1 of the load on a component. A value of 0 would indicate a completely idle component that is simply waiting for input. A value of 1 would indicate a that is never idle. This value is updated every 5 seconds.

component_id

The Vector component ID.

component_kind

The Vector component kind.

component_type

The Vector component type.

host optional

The hostname of the system Vector is running on.

pid optional

The process ID of the Vector instance.

How it works

Routing to multiple components

An event can only be routed to a single output. The following is an example of how you can create two exclusive routes (plus the implicitly created _unmatched route).

transforms:
	transform0:
		inputs:
			- source0
		type: exclusive_route
		routes:
			- name: "a"
				condition:
					type: vrl
					source: .level == 1
			- name: "b"
				condition:
					type: vrl
					# Note that the first condition is redundant. The previous route will always have precedence.
					source: .level == 1 || .level == 2

tests:
	- name: case-1
		inputs:
			- type: log
				insert_at: transform0
				log_fields:
					level: 1
			- type: log
				insert_at: transform0
				log_fields:
					level: 2
		outputs:
			- extract_from: transform0.a
				conditions:
					- type: vrl
						source: |
							assert!(.level == 1)
			- extract_from: transform0.b
				conditions:
					- type: vrl
						source: |
							assert!(.level == 2)

State

This component is stateless, meaning its behavior is consistent across each input.