Concat Filter 🔗︎

Overview 🔗︎

Fluentd Filter plugin to concatenate multiline log separated in multiple events.

Configuration 🔗︎

Concat 🔗︎

key (string, optional) 🔗︎

Specify field name in the record to parse. If you leave empty the Container Runtime default will be used.

Default: -

separator (string, optional) 🔗︎

The separator of lines.

Default: “\n”

n_lines (int, optional) 🔗︎

The number of lines. This is exclusive with multiline_start_regex.

Default: -

multiline_start_regexp (string, optional) 🔗︎

The regexp to match beginning of multiline. This is exclusive with n_lines.

Default: -

multiline_end_regexp (string, optional) 🔗︎

The regexp to match ending of multiline. This is exclusive with n_lines.

Default: -

continuous_line_regexp (string, optional) 🔗︎

The regexp to match continuous lines. This is exclusive with n_lines.

Default: -

stream_identity_key (string, optional) 🔗︎

The key to determine which stream an event belongs to.

Default: -

flush_interval (int, optional) 🔗︎

The number of seconds after which the last received event log will be flushed. If specified 0, wait for next line forever.

Default: -

timeout_label (string, optional) 🔗︎

The label name to handle events caused by timeout.

Default: -

use_first_timestamp (bool, optional) 🔗︎

Use timestamp of first record when buffer is flushed.

Default: False

partial_key (string, optional) 🔗︎

The field name that is the reference to concatenate records

Default: -

partial_value (string, optional) 🔗︎

The value stored in the field specified by partial_key that represent partial log

Default: -

keep_partial_key (bool, optional) 🔗︎

If true, keep partial_key in concatenated records

Default: False

use_partial_metadata (string, optional) 🔗︎

Use partial metadata to concatenate multiple records

Default: -

keep_partial_metadata (string, optional) 🔗︎

If true, keep partial metadata

Default: -

Example Concat filter configurations 🔗︎

kind: Flow
 name: demo-flow
   - concat:
       partial_key: "partial_message"
       separator: ""
       n_lines: 10
 selectors: {}
   - demo-output

Fluentd Config Result 🔗︎

<filter **>
 @type concat
 @id test_concat
 key message
 n_lines 10
 partial_key partial_message