translate

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

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

The destination field you wish to populate with the translated code. The default is a field named translation. Set this to the same value as source if you want to do a substitution, in this case filter will allways succeed. This will clobber the old value of the source field!

The dictionary to use for translation, when specified in the logstash filter configuration item (i.e. do not use the @dictionary_path YAML file) Example:

    filter {
      translate {
        dictionary => [ "100", "Continue",
                        "101", "Switching Protocols",
                        "merci", "thank you",
                        "old version", "new version" ]
      }
    }
NOTE: it is an error to specify both `dictionary` and `dictionary_path`

The full path of the external YAML dictionary file. The format of the table should be a standard YAML file. Make sure you specify any integer-based keys in quotes. The YAML file should look something like this:

    "100": Continue
    "101": Switching Protocols
    merci: gracias
    old version: new version

When exact => true, the translate filter will populate the destination field with the exact contents of the dictionary value. When exact => false, the filter will populate the destination field with the result of any existing destination field’s data, with the translated value substituted in-place.

For example, consider this simple translation.yml, configured to check the data field:

    foo: bar

If logstash receives an event with the data field set to foo, and exact => true, the destination field will be populated with the string bar. If exact => false, and logstash receives the same event, the destination field will be also set to bar. However, if logstash receives an event with the data field set to foofing, the destination field will be set to barfing.

Set both exact => true AND regex => `true if you would like to match using dictionary keys as regular expressions. A large dictionary could be expensive to match in this case.

In case no translation occurs in the event (no matches), this will add a default translation string, which will always populate field, if the match failed.

For example, if we have configured fallback => "no match", using this dictionary:

    foo: bar

Then, if logstash received an event with the field foo set to bar, the destination field would be set to bar. However, if logstash received an event with foo set to nope, then the destination field would still be populated, but with the value of no match. This configuration can be dynamic and include parts of the event using the %{field} syntax.

The name of the logstash event field containing the value to be compared for a match by the translate filter (e.g. message, host, response_code).

If this field is an array, only the first value will be used.

If the destination (or target) field already exists, this configuration item specifies whether the filter should skip translation (default) or overwrite the target field value with the new translation value.

Call the filter flush method at regular interval. Optional.

When using a dictionary file, this setting will indicate how frequently (in seconds) logstash will check the YAML file for updates.

If you’d like to treat dictionary keys as regular expressions, set exact => true. Note: this is activated only when exact => true.

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

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