Dictionary based map filter for Fluentd

Map field to other value with dictionary

Use RubyGems:

gem install fluent-plugin-dict-map

Use @type dict_map in <filter>.

<filter pattern>
  @type dict_map
  key_name level
  dictionary {"I":"INFO","W":"WARN","E":"ERROR"}
</filter>

For example, if following record is passed,

{"msg":"hello!","level":"I"}

then you got filtered record like below:

{"msg":"hello!","level":"INFO"}

The target key name.

The destination key name for mapped result. If not specified, the value is overwritten in key_name.

Example:

# configuration
destination_key_name mapped
# filtered record
{"msg":"hello!","level":"I","mapped":"INFO"}

This value is used when incoming value is missing in the dictionary. If not specified, value mapping doesn't happen.

# configuration
default_value UNKNOWN
# incoming record
{"msg":"hello!","level":"Z"}
# filtered record
{"msg":"hello!","level":"UNKNOWN"}

The json dictionary for value mapping.

Use json file instead of in-place dictionary parameter. This is useful for large dictionary. File ext must be json.

Example:

dictionary_path /path/to/dict.json