:plugin: fingerprint :type: filter /////////////////////////////////////////// START - GENERATED VARIABLES, DO NOT EDIT! /////////////////////////////////////////// :version: %VERSION% :release_date: %RELEASE_DATE% :changelog_url: %CHANGELOG_URL% :include_path: ../../../../logstash/docs/include /////////////////////////////////////////// END - GENERATED VARIABLES, DO NOT EDIT! /////////////////////////////////////////// [id="plugins-{type}-{plugin}"] === Fingerprint filter plugin include::{include_path}/plugin_header.asciidoc[] ==== Description Create consistent hashes (fingerprints) of one or more fields and store the result in a new field. This can e.g. be used to create consistent document ids when inserting events into Elasticsearch, allowing events in Logstash to cause existing documents to be updated rather than new documents to be created. NOTE: When using any method other than 'UUID', 'PUNCTUATION' or 'MURMUR3' you must set the key, otherwise the plugin will raise an exception NOTE: When the `target` option is set to `UUID` the result won't be a consistent hash but a random https://en.wikipedia.org/wiki/Universally_unique_identifier[UUID]. To generate UUIDs, prefer the <>. [id="plugins-{type}s-{plugin}-options"] ==== Fingerprint Filter Configuration Options This plugin supports the following configuration options plus the <> described later. [cols="<,<,<",options="header",] |======================================================================= |Setting |Input type|Required | <> |<>|No | <> |<>|No | <> |<>|No | <> |<>, one of `["SHA1", "SHA256", "SHA384", "SHA512", "MD5", "MURMUR3", "IPV4_NETWORK", "UUID", "PUNCTUATION"]`|Yes | <> |<>|No | <> |<>|No |======================================================================= Also see <> for a list of options supported by all filter plugins.   [id="plugins-{type}s-{plugin}-base64encode"] ===== `base64encode` * Value type is <> * Default value is `false` When set to `true`, the `SHA1`, `SHA256`, `SHA384`, `SHA512` and `MD5` fingerprint methods will produce base64 encoded rather than hex encoded strings. [id="plugins-{type}s-{plugin}-concatenate_sources"] ===== `concatenate_sources` * Value type is <> * Default value is `false` When set to `true` and `method` isn't `UUID` or `PUNCTUATION`, the plugin concatenates the names and values of all fields given in the `source` option into one string (like the old checksum filter) before doing the fingerprint computation. If `false` and multiple source fields are given, the target field will be an array with fingerprints of the source fields given. [id="plugins-{type}s-{plugin}-key"] ===== `key` * Value type is <> * There is no default value for this setting. When used with the `IPV4_NETWORK` method fill in the subnet prefix length. Key is required with all methods except `MURMUR3`, `PUNCTUATION` or `UUID`. With other methods fill in the HMAC key. [id="plugins-{type}s-{plugin}-method"] ===== `method` * This is a required setting. * Value can be any of: `SHA1`, `SHA256`, `SHA384`, `SHA512`, `MD5`, `MURMUR3`, `IPV4_NETWORK`, `UUID`, `PUNCTUATION` * Default value is `"SHA1"` The fingerprint method to use. If set to `SHA1`, `SHA256`, `SHA384`, `SHA512`, or `MD5` the cryptographic keyed-hash function with the same name will be used to generate the fingerprint. If set to `MURMUR3` the non-cryptographic MurmurHash function will be used. If set to `IPV4_NETWORK` the input data needs to be a IPv4 address and the hash value will be the masked-out address using the number of bits specified in the `key` option. For example, with "1.2.3.4" as the input and `key` set to 16, the hash becomes "1.2.0.0". If set to `PUNCTUATION`, all non-punctuation characters will be removed from the input string. If set to `UUID`, a https://en.wikipedia.org/wiki/Universally_unique_identifier[UUID] will be generated. The result will be random and thus not a consistent hash. [id="plugins-{type}s-{plugin}-source"] ===== `source` * Value type is <> * Default value is `"message"` The name(s) of the source field(s) whose contents will be used to create the fingerprint. If an array is given, see the `concatenate_sources` option. [id="plugins-{type}s-{plugin}-target"] ===== `target` * Value type is <> * Default value is `"fingerprint"` The name of the field where the generated fingerprint will be stored. Any current contents of that field will be overwritten. [id="plugins-{type}s-{plugin}-common-options"] include::{include_path}/{type}.asciidoc[]