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local

The local storage plugin stores the key-value pair into JSON file on local storage.

Parameters

path

Specifies the pathname to save the key-value pair. (default: nil)

mode

Specifies the file access mode. (default: 0644)

dir_mode

Specifies the directory access mode. (default: 0755)

pretty_print

Outputs the human-readable formatted JSON. (default: false)

Attributes

conf.arg

Note that conf.arg provides an alternative path parameter.

<storage awesome_path>
  @type local
</storage>

<system>
  root_dir tmp
</system>

The above configuration will save the internal states, which are handled by storage_local under tmp directory.

NOTE: Specifying the file path in the path parameter does not support the multi-workers feature. Instead, you should specify a directory there.

Example

With this configuration:

<source>
  @type sample
  auto_increment_key count
  tag storage.sample

  <storage>
    @type local
    path storage/sample.json
  </storage>
</source>

The above configuration will save the internal states such as auto_increment_value to storage/sample.json. As a result, you can resume from the next value of previous count when restarting fluentd.

If this article is incorrect or outdated, or omits critical information, please let us know. Fluentd is an open-source project under Cloud Native Computing Foundation (CNCF). All components are available under the Apache 2 License.