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Environment Variables

The Environment Variable operator lets you add fields containing environment variables to datasources. This helps with adding host related information to events.

In order to do so, you first need to add the names of allowed environment variables to the --env-vars parameter and then add an annotation to the datasource you want to contain the new field like so:

datasources:
  mydatasource:
    annotations:
      env.fields.myfieldname: MYENVVAR

This example will add a field named myfieldname to the datasource mydatasource with the static value of the environment variable called MYENVVAR.

It is important to note that environment variables will always be read from the host that runs the gadget and not on the client side.

Priority​

1

Parameters​

Global Parameters​

env-vars​

Comma-separated list of environment variables that are allowed to be included in datasources.

Default: empty

Annotations​

Data Source Annotations​

env.fields.FIELDNAME​

You can use multiple annotations like this (having distinctive FIELDNAME values) to add new fields to a datasource. The value of the annotation should be the name of the environment variable that you want the field to contain.