Splunk HTTP Event Collector (HEC)

Receive logs from Splunk

status: stable role: aggregator delivery: at-least-once egress: batch state: stateless output: log

Configuration

Example configurations

{
  "sources": {
    "my_source_id": {
      "type": "splunk_hec",
      "address": "0.0.0.0:8080",
      "token": "A94A8FE5CCB19BA61C4C08",
      "valid_tokens": [
        "A94A8FE5CCB19BA61C4C08"
      ]
    }
  }
}
[sources.my_source_id]
type = "splunk_hec"
address = "0.0.0.0:8080"
token = "A94A8FE5CCB19BA61C4C08"
valid_tokens = [ "A94A8FE5CCB19BA61C4C08" ]
---
sources:
  my_source_id:
    type: splunk_hec
    address: 0.0.0.0:8080
    token: A94A8FE5CCB19BA61C4C08
    valid_tokens:
      - A94A8FE5CCB19BA61C4C08
{
  "sources": {
    "my_source_id": {
      "type": "splunk_hec",
      "address": "0.0.0.0:8080",
      "token": "A94A8FE5CCB19BA61C4C08",
      "valid_tokens": [
        "A94A8FE5CCB19BA61C4C08"
      ]
    }
  }
}
[sources.my_source_id]
type = "splunk_hec"
address = "0.0.0.0:8080"
token = "A94A8FE5CCB19BA61C4C08"
valid_tokens = [ "A94A8FE5CCB19BA61C4C08" ]
---
sources:
  my_source_id:
    type: splunk_hec
    address: 0.0.0.0:8080
    token: A94A8FE5CCB19BA61C4C08
    tls: null
    valid_tokens:
      - A94A8FE5CCB19BA61C4C08

address

common optional string literal
The address to accept connections on.
default: 0.0.0.0:8080

tls

optional object
Configures the TLS options for incoming connections.

tls.ca_file

optional string literal
Absolute path to an additional CA certificate file, in DER or PEM format (X.509), or an in-line CA certificate in PEM format.
Examples
"/path/to/certificate_authority.crt"

tls.crt_file

optional string literal
Absolute path to a certificate file used to identify this server, in DER or PEM format (X.509) or PKCS#12, or an in-line certificate in PEM format. If this is set, and is not a PKCS#12 archive, key_file must also be set. This is required if enabled is set to true.
Examples
"/path/to/host_certificate.crt"

tls.enabled

optional bool
Require TLS for incoming connections. If this is set, an identity certificate is also required.
default: false

tls.key_file

optional string literal
Absolute path to a private key file used to identify this server, in DER or PEM format (PKCS#8), or an in-line private key in PEM format.
Examples
"/path/to/host_certificate.key"

tls.key_pass

optional string literal
Pass phrase used to unlock the encrypted key file. This has no effect unless key_file is set.
Examples
"${KEY_PASS_ENV_VAR}"
"PassWord1"
If true, Vector will require a TLS certificate from the connecting host and terminate the connection if the certificate is not valid. If false (the default), Vector will not request a certificate from the client.
default: false

token

common optional string literal
If supplied, incoming requests must supply this token in the Authorization header, just as a client would if it was communicating with the Splunk HEC endpoint directly. If not supplied, the Authorization header will be ignored and requests will not be authenticated.

Warning

This option has been deprecated, the valid_tokens option should be used.
Examples
"A94A8FE5CCB19BA61C4C08"

valid_tokens

common optional [string]
If supplied, incoming requests must supply one of these tokens in the Authorization header, just as a client would if it was communicating with the Splunk HEC endpoint directly. If not supplied, the Authorization header will be ignored and requests will not be authenticated.
Array string literal
Examples
[
  "A94A8FE5CCB19BA61C4C08"
]

Output

Logs

Event

A single event
Fields
message required string literal
The raw line, unparsed.
Examples
2019-02-13T19:48:34+00:00 [info] Started GET "/" for 127.0.0.1
splunk_channel required timestamp
The Splunk channel, value of the X-Splunk-Request-Channel header or channel query parameter, in that order of precedence.
Examples
2020-10-10T17:07:36.452332Z
timestamp required timestamp
The exact time the event was ingested into Vector.
Examples
2020-10-10T17:07:36.452332Z

Telemetry

Metrics

link

component_errors_total

counter
The total number of errors encountered by this component.
component_id required
The Vector component ID.
component_kind required
The Vector component kind.
component_name required
Deprecated, use component_id instead. The value is the same as component_id.
component_type required
The Vector component type.
error_type required
The type of the error
host required
The hostname of the system Vector is running on.
pid required
The process ID of the Vector instance.
stage required
The stage within the component at which the error occurred.

component_received_bytes_total

counter
The number of raw bytes accepted by this component from source origins.
component_id required
The Vector component ID.
component_kind required
The Vector component kind.
component_name required
Deprecated, use component_id instead. The value is the same as component_id.
component_type required
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 required
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 required
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_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 required
The Vector component ID.
component_kind required
The Vector component kind.
component_name required
Deprecated, use component_id instead. The value is the same as component_id.
component_type required
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 required
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 required
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 required
The Vector component ID.
component_kind required
The Vector component kind.
component_name required
Deprecated, use component_id instead. The value is the same as component_id.
component_type required
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 required
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 required
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 required
The Vector component ID.
component_kind required
The Vector component kind.
component_name required
Deprecated, use component_id instead. The value is the same as component_id.
component_type required
The Vector component type.
host required
The hostname of the system Vector is running on.
pid required
The process ID of the Vector instance.

component_sent_events_total

counter
The total number of events emitted by this component.
component_id required
The Vector component ID.
component_kind required
The Vector component kind.
component_name required
Deprecated, use component_id instead. The value is the same as component_id.
component_type required
The Vector component type.
host required
The hostname of the system Vector is running on.
pid required
The process ID of the Vector instance.

events_in_total

counter
The number of events accepted by this component either from tagged origins like file and uri, or cumulatively from other origins. This metric is deprecated and will be removed in a future version. Use component_received_events_total instead.
component_id required
The Vector component ID.
component_kind required
The Vector component kind.
component_name required
Deprecated, use component_id instead. The value is the same as component_id.
component_type required
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 required
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 required
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.

events_out_total

counter
The total number of events emitted by this component. This metric is deprecated and will be removed in a future version. Use component_sent_events_total instead.
component_id required
The Vector component ID.
component_kind required
The Vector component kind.
component_name required
Deprecated, use component_id instead. The value is the same as component_id.
component_type required
The Vector component type.
host required
The hostname of the system Vector is running on.
pid required
The process ID of the Vector instance.

http_request_errors_total

counter
The total number of HTTP request errors for this component.
host required
The hostname of the system Vector is running on.
pid required
The process ID of the Vector instance.

requests_received_total

counter
The total number of requests received by this component.
component_id required
The Vector component ID.
component_kind required
The Vector component kind.
component_name required
Deprecated, use component_id instead. The value is the same as component_id.
component_type required
The Vector component type.
host required
The hostname of the system Vector is running on.
pid required
The process ID of the Vector instance.

How it works

Context

By default, the splunk_hec source augments events with helpful context keys.

State

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

Transport Layer Security (TLS)

Vector uses OpenSSL for TLS protocols. You can adjust TLS behavior via the tls.* options.