IMPORTANT: No additional bug fixes or documentation updates will be released for this version. For the latest information, see the current release documentation.

« metaevent punct »

› › ›

prune

edit

prune

edit

This is a community-maintained plugin! It does not ship with Logstash by default, but it is easy to install by running bin/plugin install logstash-filter-prune.

The prune filter is for pruning event data from @fields based on whitelist/blacklist of field names or their values (names and values can also be regular expressions).

Synopsis

edit

This plugin supports the following configuration options:

Required configuration options:

prune {
}

Available configuration options:

Setting	Input type	Required	Default value
`add_field`	hash	No	`{}`
`add_tag`	array	No	`[]`
`blacklist_names`	array	No	`["%{[^}]+}"]`
`blacklist_values`	hash	No	`{}`
`interpolate`	boolean	No	`false`
`periodic_flush`	boolean	No	`false`
`remove_field`	array	No	`[]`
`remove_tag`	array	No	`[]`
`whitelist_names`	array	No	`[]`
`whitelist_values`	hash	No	`{}`

Details

edit

`add_field`

edit

Value type is hash
Default value is {}

If this filter is successful, add any arbitrary fields to this event. Field names can be dynamic and include parts of the event using the %{field}.

Example:

    filter {
      prune {
        add_field => { "foo_%{somefield}" => "Hello world, from %{host}" }
      }
    }
[source,ruby]
    # You can also add multiple fields at once:
    filter {
      prune {
        add_field => {
          "foo_%{somefield}" => "Hello world, from %{host}"
          "new_field" => "new_static_value"
        }
      }
    }

If the event has field "somefield" == "hello" this filter, on success, would add field foo_hello if it is present, with the value above and the %{host} piece replaced with that value from the event. The second example would also add a hardcoded field.

`add_tag`

edit

Value type is array
Default value is []

If this filter is successful, add arbitrary tags to the event. Tags can be dynamic and include parts of the event using the %{field} syntax.

Example:

    filter {
      prune {
        add_tag => [ "foo_%{somefield}" ]
      }
    }
[source,ruby]
    # You can also add multiple tags at once:
    filter {
      prune {
        add_tag => [ "foo_%{somefield}", "taggedy_tag"]
      }
    }

If the event has field "somefield" == "hello" this filter, on success, would add a tag foo_hello (and the second example would of course add a taggedy_tag tag).

`blacklist_names`

edit

Value type is array
Default value is ["%{[^}]+}"]

Exclude fields which names match specified regexps, by default exclude unresolved %{field} strings.

    filter {
      prune {
        tags            => [ "apache-accesslog" ]
        blacklist_names => [ "method", "(referrer|status)", "${some}_field" ]
      }
    }

`blacklist_values`

edit

Value type is hash
Default value is {}

Exclude specified fields if their values match regexps. In case field values are arrays, the fields are pruned on per array item in case all array items are matched whole field will be deleted.

    filter {
      prune {
        tags             => [ "apache-accesslog" ]
        blacklist_values => [ "uripath", "/index.php",
                              "method", "(HEAD|OPTIONS)",
                              "status", "^[^2]" ]
      }
    }

`interpolate`

edit

Value type is boolean
Default value is false

Trigger whether configation fields and values should be interpolated for dynamic values. Probably adds some performance overhead. Defaults to false.

`periodic_flush`

edit

Value type is boolean
Default value is false

Call the filter flush method at regular interval. Optional.

`remove_field`

edit

Value type is array
Default value is []

If this filter is successful, remove arbitrary fields from this event. Fields names can be dynamic and include parts of the event using the %{field} Example:

    filter {
      prune {
        remove_field => [ "foo_%{somefield}" ]
      }
    }
[source,ruby]
    # You can also remove multiple fields at once:
    filter {
      prune {
        remove_field => [ "foo_%{somefield}", "my_extraneous_field" ]
      }
    }

If the event has field "somefield" == "hello" this filter, on success, would remove the field with name foo_hello if it is present. The second example would remove an additional, non-dynamic field.

`remove_tag`

edit

Value type is array
Default value is []

If this filter is successful, remove arbitrary tags from the event. Tags can be dynamic and include parts of the event using the %{field} syntax.

Example:

    filter {
      prune {
        remove_tag => [ "foo_%{somefield}" ]
      }
    }
[source,ruby]
    # You can also remove multiple tags at once:
    filter {
      prune {
        remove_tag => [ "foo_%{somefield}", "sad_unwanted_tag"]
      }
    }

If the event has field "somefield" == "hello" this filter, on success, would remove the tag foo_hello if it is present. The second example would remove a sad, unwanted tag as well.

`whitelist_names`

edit

Value type is array
Default value is []

Include only fields only if their names match specified regexps, default to empty list which means include everything.

    filter {
      prune {
        tags            => [ "apache-accesslog" ]
        whitelist_names => [ "method", "(referrer|status)", "${some}_field" ]
      }
    }

`whitelist_values`

edit

Value type is hash
Default value is {}

Include specified fields only if their values match regexps. In case field values are arrays, the fields are pruned on per array item thus only matching array items will be included.

    filter {
      prune {
        tags             => [ "apache-accesslog" ]
        whitelist_values => [ "uripath", "/index.php",
                              "method", "(GET|POST)",
                              "status", "^[^2]" ]
      }
    }

« metaevent punct »