STDIN Source

The Vector stdin source ingests data through standard input (STDIN) and outputs log events.


type = "stdin" # required
  • stringoptional


    The key name added to each event representing the current host. This can also be globally set via the global [host_key](#host_key) option.

    See Context for more info.

    • Default: "host"
    • View examples
  • int (bytes)optional


    The maxiumum bytes size of a message before it is discarded.

    • Default: 102400 (bytes)
    • View examples


example log event
// ...
"host": "",
"message": "Started GET / for at 2012-03-10 14:28:14 +0100",
"timestamp": "2019-11-01T21:15:47+00:00"
// ...
  • stringcommonrequired


    The local hostname.

    • No default
    • View examples
  • stringcommonrequired


    The raw message, unaltered.

    • No default
    • View examples
  • timestampcommonrequired


    The exact time the event was ingested.

    • No default
    • View examples


Given the following input:

2019-02-13T19:48:34+00:00 [info] Started GET "/" for

A log event will be output with the following structure:

"timestamp": <current_timestamp>,
"message": "2019-02-13T19:48:34+00:00 [info] Started GET "/" for",
"host": "<local_hostname>"

How It Works


By default, the stdin source will add context keys to your events via the host_key options.

Environment Variables

Environment variables are supported through all of Vector's configuration. Simply add ${MY_ENV_VAR} in your Vector configuration file and the variable will be replaced before being evaluated.

You can learn more in the Environment Variables section.

Line Delimiters

Each line is read until a new line delimiter (the 0xA byte) is found.