Memcached filter plugin

The hosts parameter accepts an array of addresses corresponding to memcached instances.

Hosts can be specified via FQDN (e.g., example.com), an IPV4 address (e.g., 123.45.67.89), or an IPV6 address (e.g. ::1 or 2001:0db8:85a3:0000:0000:8a2e:0370:7334). If your memcached host uses a non-standard port, the port can be specified by appending a colon (:) and the port number; to include a port with an IPv6 address, the address must first be wrapped in square-brackets ([ and ]), e.g., [::1]:11211.

If more than one host is specified, requests will be distributed to the given hosts using a modulus of the CRC-32 checksum of each key.

If specified, prefix all memcached keys with the given string followed by a colon (:); this is useful if all keys being used by this plugin share a common prefix.

EXAMPLE:

In the following configuration, we would GET fruit:banana and fruit:apple from memcached:

filter {
  memcached {
    namespace => "fruit"
    get => {
      "banana" => "[fruit-stats][banana]"
      "apple"  => "[fruit-stats][apple]
    }
  }
}

If specified, get the values for the given keys from memcached, and store them in the corresponding fields on the event.

filter {
  memcached {
    get => {
      "memcached-key-1" => "field1"
      "memcached-key-2" => "[nested][field2]"
    }
  }
}

If specified, extracts the values from the given event fields, and sets the corresponding keys to those values in memcached with the configured ttl

filter {
  memcached {
    set => {
      "field1"           => "memcached-key-1"
      "[nested][field2]" => "memcached-key-2"
    }
  }
}

For usages of this plugin that persist data to memcached (e.g., set), the time-to-live in seconds

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 {
      memcached {
        add_field => { "foo_%{somefield}" => "Hello world, from %{host}" }
      }
    }

    # You can also add multiple fields at once:
    filter {
      memcached {
        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 {
      memcached {
        add_tag => [ "foo_%{somefield}" ]
      }
    }

    # You can also add multiple tags at once:
    filter {
      memcached {
        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).

Disable or enable metric logging for this specific plugin instance. By default we record all the metrics we can, but you can disable metrics collection for a specific plugin.

Add a unique ID to the plugin configuration. If no ID is specified, Logstash will generate one. It is strongly recommended to set this ID in your configuration. This is particularly useful when you have two or more plugins of the same type, for example, if you have 2 memcached filters. Adding a named ID in this case will help in monitoring Logstash when using the monitoring APIs.

    filter {
      memcached {
        id => "ABC"
      }
    }

Call the filter flush method at regular interval. Optional.

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 {
      memcached {
        remove_field => [ "foo_%{somefield}" ]
      }
    }

    # You can also remove multiple fields at once:
    filter {
      memcached {
        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 {
      memcached {
        remove_tag => [ "foo_%{somefield}" ]
      }
    }

    # You can also remove multiple tags at once:
    filter {
      memcached {
        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.