Filebeat supports autodiscover based on hints from the provider. The hints system looks for hints in Kubernetes Pod annotations or Docker labels that have the prefix co.elastic.logs. As soon as the container starts, Filebeat will check if it contains any hints and launch the proper config for it. Hints tell Filebeat how to get logs for the given container. By default logs will be retrieved from the container using the docker input. You can use hints to modify this behavior. This is the full list of supported hints:

co.elastic.logs/disableedit

Filebeat gets logs from all containers by default, you can set this hint to true to ignore the output of the container. Filebeat won’t read or send logs from it.

co.elastic.logs/multiline.*edit

Multiline settings. See Manage multiline messages for a full list of all supported options.

co.elastic.logs/include_linesedit

A list of regular expressions to match the lines that you want Filebeat to include. See Configure inputs for more info.

co.elastic.logs/exclude_linesedit

A list of regular expressions to match the lines that you want Filebeat to exclude. See Configure inputs for more info.

co.elastic.logs/moduleedit

Instead of using raw docker input, specifies the module to use to parse logs from the container. See Modules for the list of supported modules.

co.elastic.logs/filesetedit

When module is configured, map container logs to module filesets. You can either configure a single fileset like this:

co.elastic.logs/fileset: access

Or configure a fileset per stream in the container (stdout and stderr):

co.elastic.logs/fileset.stdout: access
co.elastic.logs/fileset.stderr: error

co.elastic.logs/rawedit

When an entire input/module configuration needs to be completely set the raw hint can be used. You can provide a stringified JSON of the input configuration. raw overrides every other hint and can be used to create bot a single or a list of configurations.

co.elastic.logs/raw: "[{\"containers\":{\"ids\":[\"${data.container.id}\"]},\"multiline\":{\"negate\":\"true\",\"pattern\":\"^test\"},\"type\":\"docker\"}]"

co.elastic.logs/processorsedit

Define a processor to be added to the Filebeat input/module configuration. See Filter and enhance the exported data for the list of supported processors.

In order to provide ordering of the processor definition, numbers can be provided. If not, the hints builder will do arbitrary ordering:

co.elastic.logs/processors.1.dissect.tokenizer: "%{key1} %{key2}"
co.elastic.logs/processors.dissect.tokenizer: "%{key2} %{key1}"

In the above sample the processor definition tagged with 1 would be executed first.

Kubernetesedit

Kubernetes autodiscover provider supports hints in Pod annotations. To enable it just set hints.enabled:

filebeat.autodiscover:
  providers:
    - type: kubernetes
      hints.enabled: true

You can annotate Kubernetes Pods with useful info to spin up Filebeat inputs or modules:

annotations:
  co.elastic.logs/multiline.pattern: '^\['
  co.elastic.logs/multiline.negate: true
  co.elastic.logs/multiline.match: after

Multiple containersedit

When a pod has multiple containers, the settings are shared unless you put the container name in the hint. For example, these hints configure multiline settings for all containers in the pod, but set a specific exclude_lines hint for the container called sidecar.

annotations:
  co.elastic.logs/multiline.pattern: '^\['
  co.elastic.logs/multiline.negate: true
  co.elastic.logs/multiline.match: after
  co.elastic.logs.sidecar/exclude_lines: '^DBG'

Dockeredit

Docker autodiscover provider supports hints in labels. To enable it just set hints.enabled:

filebeat.autodiscover:
  providers:
    - type: docker
      hints.enabled: true

You can label Docker containers with useful info to spin up Filebeat inputs, for example:

  co.elastic.logs/module: nginx
  co.elastic.logs/fileset.stdout: access
  co.elastic.logs/fileset.stderr: error

The above labels configure Filebeat to use the Nginx module to harvest logs for this container. Access logs will be retrieved from stdout stream, and error logs from stderr.