Grok Filter

as donto believed on

From Dontopedia, the open, paraconsistent wiki. (Last updated 2026-06-10.)

Grok Filter has 83 facts recorded in Dontopedia across 9 references, with 13 live disagreements.

83 facts·52 predicates·9 sources·13 in dispute

Mostly:extracts(7), rdf:type(6), extracts field(6)

Inbound mentions (15)

Other subjects in dontopedia point AT this entity as a value. These are inverse relationships — e.g. "X motherOf this subject" — and answer questions the forward facts can't. Grouped by predicate.

`contains`Contains(2)

Filter Sectionex:filter-section
Filter Sectionex:filter-section

`describes`Describes(2)

Configuration Explanationex:configuration-explanation
Grok Explanationex:grok-explanation

`ex:contains`Ex:contains(2)

Filter Chainex:filter-chain
Filter Sectionex:filter-section

`hasFilter`Has Filter(2)

Logstashex:logstash
Logstash Configurationex:logstash-configuration

`ex:containsGrokFilter`Ex:contains Grok Filter(1)

Filter Sectionex:filter-section

`ex:hasComponent`Ex:has Component(1)

Logstashex:logstash

`follows`Follows(1)

Output Sectionex:output-section

`hasFilterConfiguration`Has Filter Configuration(1)

Logstashex:logstash

`hasFilterSection`Has Filter Section(1)

Logstash Configex:logstash-config

`uses`Uses(1)

Filter Sectionex:filter-section

`usesGrokFilter`Uses Grok Filter(1)

Logstash Configex:logstash-config

Other facts (80)

The long tail: predicates that appear too rarely to warrant their own section. Filter or scroll to find a specific one. Each row links to its source.

80 facts

Predicate	Value	Ref
Extracts	loglevel	[2]
Extracts	message	[2]
Extracts	Structured Fields	[5]
Extracts	Timestamp Field	[7]
Extracts	User Id Field	[7]
Extracts	Operation Field	[7]
Extracts	Outcome Field	[7]
Rdf:type	Filter Type	[1]
Rdf:type	Filter Plugin	[2]
Rdf:type	Filter Plugin	[4]
Rdf:type	Filter Plugin	[5]
Rdf:type	Filter Plugin	[6]
Rdf:type	Filter Component	[8]
Extracts Field	Timestamp Field	[5]
Extracts Field	Loglevel Field	[5]
Extracts Field	Message Field	[5]
Extracts Field	Timestamp Field	[8]
Extracts Field	Level Field	[8]
Extracts Field	Message Field	[8]
Uses Pattern	LOGLEVEL	[2]
Uses Pattern	GREEDYDATA	[2]
Uses Pattern	specified pattern	[4]
Uses Pattern	%{TIMESTAMP_ISO8601:timestamp} - %{LOGLEVEL:level} - %{GREEDYDATA:message}	[8]
Purpose	Parse log messages	[2]
Purpose	parse log structure	[2]
Purpose	Log Parsing	[9]
Has Match	message pattern with LOGLEVEL and GREEDYDATA	[2]
Has Match	Message Pattern	[6]
Captures	loglevel group	[2]
Captures	message group	[2]
Ex:configuration Option	Add Tag Option	[3]
Ex:configuration Option	Tag on Failure Option	[3]
Ex:attribute	grok_matched	[3]
Ex:attribute	grok_unmatched	[3]
Ex:extracts	Loglevel	[3]
Ex:extracts	Message	[3]
Produces Tag	Grok Matched Tag	[4]
Produces Tag	Grok Unmatched Tag	[4]
Generates	Grok Matched Tag	[4]
Generates	Grok Unmatched Tag	[4]
Has Match Pattern	%{TIMESTAMP_ISO8601:timestamp} - %{LOGLEVEL:level} - %{GREEDYDATA:message}	[1]
Extracts Timestamp	timestamp	[1]
Extracts Level	level	[1]
Extracts Message	message	[1]
Matches Against	message field	[2]
Contains	comment about parsing log messages	[2]
Ex:purpose	parse-log-messages	[3]
Ex:failure Handling	tag-events	[3]
Ex:has Match Pattern	%{LOGLEVEL:loglevel} %{GREEDYDATA:message}	[3]
Ex:success Tag	grok_matched	[3]
Ex:failure Tag	grok_unmatched	[3]
Ex:processes	Log Messages	[3]
Ex:performs Matching	true	[3]
Ex:performs Tagging	true	[3]
Ex:configured With	Match Pattern	[3]
Ex:uses Grok Syntax	true	[3]
Ex:can Tag Success	grok_matched	[3]
Ex:can Tag Failure	grok_unmatched	[3]
Ex:precedes	Conditional Statement	[3]
Ex:uses Match Syntax	match => { ... }	[3]
Ex:uses Add Tag Syntax	add_tag => ["grok_matched"]	[3]
Ex:uses Tag on Failure Syntax	tag_on_failure => ["grok_unmatched"]	[3]
Attempts Pattern Match	true	[4]
Adds Tag on Match	grok_matched	[4]
Adds Tag on Mismatch	grok_unmatched	[4]
Precedes	Output Section	[4]
Classifies	Log Events	[4]
Has Behavior	Tag Assignment	[4]
Uses Plugin	Grok Plugin	[5]
Match Pattern	%{TIMESTAMP_ISO8601:timestamp} %{LOGLEVEL:loglevel} %{GREEDYDATA:message}	[5]
Parse Timestamp	Timestamp Field	[5]
Parse Log Level	Loglevel Field	[5]
Parse Message	Message Field	[5]
Structures	Unstructured Logs	[5]
Matches Pattern	%{TIMESTAMP_ISO8601:timestamp} %{LOGLEVEL:loglevel} %{GREEDYDATA:message}	[5]
Uses Built in Patterns	true	[5]
Applies to	Message Field	[7]
Is Part of	Filter Section	[7]
Pattern	%{TIMESTAMP_ISO8601:timestamp} - %{LOGLEVEL:level} - %{GREEDYDATA:message}	[8]
Part of	Filter Section	[9]

Timeline axis is valid_time — when each source says the fact was true in the world, not when Dontopedia learned about it. Retracted rows are kept for provenance; coloured stripes indicate the context kind.

83 undated

—

typebeam/fab016b2-9f06-4f1e-bfaf-b248a8ce376e

ex:FilterType

—

hasMatchPatternbeam/fab016b2-9f06-4f1e-bfaf-b248a8ce376e

%{TIMESTAMP_ISO8601:timestamp} - %{LOGLEVEL:level} - %{GREEDYDATA:message}

—

extractsTimestampbeam/fab016b2-9f06-4f1e-bfaf-b248a8ce376e

timestamp

—

extractsLevelbeam/fab016b2-9f06-4f1e-bfaf-b248a8ce376e

level

—

extractsMessagebeam/fab016b2-9f06-4f1e-bfaf-b248a8ce376e

message

—

typebeam/66f80242-9395-4a33-848f-8f40a285fbbe

ex:FilterPlugin

—

purposebeam/66f80242-9395-4a33-848f-8f40a285fbbe

Parse log messages

—

hasMatchbeam/66f80242-9395-4a33-848f-8f40a285fbbe

message pattern with LOGLEVEL and GREEDYDATA

—

extractsbeam/66f80242-9395-4a33-848f-8f40a285fbbe

loglevel

—

extractsbeam/66f80242-9395-4a33-848f-8f40a285fbbe

message

—

usesPatternbeam/66f80242-9395-4a33-848f-8f40a285fbbe

LOGLEVEL

—

usesPatternbeam/66f80242-9395-4a33-848f-8f40a285fbbe

GREEDYDATA

—

matchesAgainstbeam/66f80242-9395-4a33-848f-8f40a285fbbe

message field

—

containsbeam/66f80242-9395-4a33-848f-8f40a285fbbe

comment about parsing log messages

—

capturesbeam/66f80242-9395-4a33-848f-8f40a285fbbe

loglevel group

—

capturesbeam/66f80242-9395-4a33-848f-8f40a285fbbe

message group

—

purposebeam/66f80242-9395-4a33-848f-8f40a285fbbe

parse log structure

—

configurationOptionbeam/daa5b5dd-9ea8-487c-905f-9e2be8fd252a

ex:add-tag-option

—

configurationOptionbeam/daa5b5dd-9ea8-487c-905f-9e2be8fd252a

ex:tag-on-failure-option

—

attributebeam/daa5b5dd-9ea8-487c-905f-9e2be8fd252a

grok_matched

—

attributebeam/daa5b5dd-9ea8-487c-905f-9e2be8fd252a

grok_unmatched

—

purposebeam/daa5b5dd-9ea8-487c-905f-9e2be8fd252a

parse-log-messages

—

failureHandlingbeam/daa5b5dd-9ea8-487c-905f-9e2be8fd252a

tag-events

—

hasMatchPatternbeam/daa5b5dd-9ea8-487c-905f-9e2be8fd252a

%{LOGLEVEL:loglevel} %{GREEDYDATA:message}

—

successTagbeam/daa5b5dd-9ea8-487c-905f-9e2be8fd252a

grok_matched

—

failureTagbeam/daa5b5dd-9ea8-487c-905f-9e2be8fd252a

grok_unmatched

—

processesbeam/daa5b5dd-9ea8-487c-905f-9e2be8fd252a

ex:log-messages

—

extractsbeam/daa5b5dd-9ea8-487c-905f-9e2be8fd252a

ex:loglevel

—

extractsbeam/daa5b5dd-9ea8-487c-905f-9e2be8fd252a

ex:message

—

performsMatchingbeam/daa5b5dd-9ea8-487c-905f-9e2be8fd252a

true

—

performsTaggingbeam/daa5b5dd-9ea8-487c-905f-9e2be8fd252a

true

—

configuredWithbeam/daa5b5dd-9ea8-487c-905f-9e2be8fd252a

ex:match-pattern

—

usesGrokSyntaxbeam/daa5b5dd-9ea8-487c-905f-9e2be8fd252a

true

—

canTagSuccessbeam/daa5b5dd-9ea8-487c-905f-9e2be8fd252a

grok_matched

—

canTagFailurebeam/daa5b5dd-9ea8-487c-905f-9e2be8fd252a

grok_unmatched

—

precedesbeam/daa5b5dd-9ea8-487c-905f-9e2be8fd252a

ex:conditional-statement

—

usesMatchSyntaxbeam/daa5b5dd-9ea8-487c-905f-9e2be8fd252a

match => { ... }

—

usesAddTagSyntaxbeam/daa5b5dd-9ea8-487c-905f-9e2be8fd252a

add_tag => ["grok_matched"]

—

usesTagOnFailureSyntaxbeam/daa5b5dd-9ea8-487c-905f-9e2be8fd252a

tag_on_failure => ["grok_unmatched"]

—

attemptsPatternMatchbeam/4c16b8f7-02fb-436a-b7af-07c763e03ede

true

—

addsTagOnMatchbeam/4c16b8f7-02fb-436a-b7af-07c763e03ede

grok_matched

—

addsTagOnMismatchbeam/4c16b8f7-02fb-436a-b7af-07c763e03ede

grok_unmatched

—

usesPatternbeam/4c16b8f7-02fb-436a-b7af-07c763e03ede

specified pattern

—

typebeam/4c16b8f7-02fb-436a-b7af-07c763e03ede

ex:FilterPlugin

—

labelbeam/4c16b8f7-02fb-436a-b7af-07c763e03ede

Grok Filter

—

producesTagbeam/4c16b8f7-02fb-436a-b7af-07c763e03ede

ex:grok_matched-tag

—

producesTagbeam/4c16b8f7-02fb-436a-b7af-07c763e03ede

ex:grok_unmatched-tag

—

generatesbeam/4c16b8f7-02fb-436a-b7af-07c763e03ede

ex:grok_matched-tag

—

generatesbeam/4c16b8f7-02fb-436a-b7af-07c763e03ede

ex:grok_unmatched-tag

—

precedesbeam/4c16b8f7-02fb-436a-b7af-07c763e03ede

ex:output-section

—

classifiesbeam/4c16b8f7-02fb-436a-b7af-07c763e03ede

ex:log-events

—

hasBehaviorbeam/4c16b8f7-02fb-436a-b7af-07c763e03ede

ex:tag-assignment

—

usesPluginbeam/8b60f094-e048-4234-b82c-c82d957c87d0

ex:grok-plugin

—

matchPatternbeam/8b60f094-e048-4234-b82c-c82d957c87d0

%{TIMESTAMP_ISO8601:timestamp} %{LOGLEVEL:loglevel} %{GREEDYDATA:message}

—

extractsFieldbeam/8b60f094-e048-4234-b82c-c82d957c87d0

ex:timestamp-field

—

extractsFieldbeam/8b60f094-e048-4234-b82c-c82d957c87d0

ex:loglevel-field

—

extractsFieldbeam/8b60f094-e048-4234-b82c-c82d957c87d0

ex:message-field

—

parseTimestampbeam/8b60f094-e048-4234-b82c-c82d957c87d0

ex:timestamp-field

—

parseLogLevelbeam/8b60f094-e048-4234-b82c-c82d957c87d0

ex:loglevel-field

—

parseMessagebeam/8b60f094-e048-4234-b82c-c82d957c87d0

ex:message-field

—

typebeam/8b60f094-e048-4234-b82c-c82d957c87d0

ex:FilterPlugin

—

structuresbeam/8b60f094-e048-4234-b82c-c82d957c87d0

ex:unstructured-logs

—

extractsbeam/8b60f094-e048-4234-b82c-c82d957c87d0

ex:structured-fields

—

matchesPatternbeam/8b60f094-e048-4234-b82c-c82d957c87d0

%{TIMESTAMP_ISO8601:timestamp} %{LOGLEVEL:loglevel} %{GREEDYDATA:message}

—

usesBuiltInPatternsbeam/8b60f094-e048-4234-b82c-c82d957c87d0

true

—

typebeam/ba0220ff-7108-441d-b142-5d1a6c2378d5

ex:FilterPlugin

—

hasMatchbeam/ba0220ff-7108-441d-b142-5d1a6c2378d5

ex:message-pattern

—

appliesTobeam/fd1597e6-53d1-4447-8c85-acbd7fc9b092

ex:message-field

—

extractsbeam/fd1597e6-53d1-4447-8c85-acbd7fc9b092

ex:timestamp-field

—

extractsbeam/fd1597e6-53d1-4447-8c85-acbd7fc9b092

ex:user-id-field

—

extractsbeam/fd1597e6-53d1-4447-8c85-acbd7fc9b092

ex:operation-field

—

extractsbeam/fd1597e6-53d1-4447-8c85-acbd7fc9b092

ex:outcome-field

—

isPartOfbeam/fd1597e6-53d1-4447-8c85-acbd7fc9b092

ex:filter-section

—

typebeam/6dfc04d4-a85a-41e2-9f32-65e6e4aa91cd

ex:FilterComponent

—

labelbeam/6dfc04d4-a85a-41e2-9f32-65e6e4aa91cd

Grok filter

—

patternbeam/6dfc04d4-a85a-41e2-9f32-65e6e4aa91cd

%{TIMESTAMP_ISO8601:timestamp} - %{LOGLEVEL:level} - %{GREEDYDATA:message}

—

extractsFieldbeam/6dfc04d4-a85a-41e2-9f32-65e6e4aa91cd

ex:timestamp-field

—

extractsFieldbeam/6dfc04d4-a85a-41e2-9f32-65e6e4aa91cd

ex:level-field

—

extractsFieldbeam/6dfc04d4-a85a-41e2-9f32-65e6e4aa91cd

ex:message-field

—

usesPatternbeam/6dfc04d4-a85a-41e2-9f32-65e6e4aa91cd

%{TIMESTAMP_ISO8601:timestamp} - %{LOGLEVEL:level} - %{GREEDYDATA:message}

—

purposebeam/d61f78c1-ffce-415b-a5ec-0a5b8180d07b

ex:log-parsing

—

partOfbeam/d61f78c1-ffce-415b-a5ec-0a5b8180d07b

ex:filter-section

—

labelbeam/d61f78c1-ffce-415b-a5ec-0a5b8180d07b

grok filter

References (9)

9 references

[1]Fab016b2 9f06 4f1e Bfaf B248a8ce376e5 facts
ctx:claims/beam/fab016b2-9f06-4f1e-bfaf-b248a8ce376e
- full textbeam-chunk
  text/plain1 KBdoc:beam/fab016b2-9f06-4f1e-bfaf-b248a8ce376e
  Show excerpt
  input { file { path => "/path/to/your/logfile.log" start_position => "beginning" sincedb_path => "/dev/null" # Prevents Logstash from remembering the last position } } filter { grok { ma…
[2]66f80242 9395 4a33 848f 8f40a285fbbe12 facts
ctx:claims/beam/66f80242-9395-4a33-848f-8f40a285fbbe
- full textbeam-chunk
  text/plain1023 Bdoc:beam/66f80242-9395-4a33-848f-8f40a285fbbe
  Show excerpt
  By integrating Kafka with the ELK Stack, you can build a highly scalable and performant logging system capable of handling 8,000 events per hour with under 150ms latency. This setup leverages Kafka's high-throughput capabilities and Logstas…
[3]Daa5b5dd 9ea8 487c 905f 9e2be8fd252a22 facts
ctx:claims/beam/daa5b5dd-9ea8-487c-905f-9e2be8fd252a
[4]4c16b8f7 02fb 436a B7af 07c763e03ede13 facts
ctx:claims/beam/4c16b8f7-02fb-436a-b7af-07c763e03ede
- full textbeam-chunk
  text/plain1 KBdoc:beam/4c16b8f7-02fb-436a-b7af-07c763e03ede
  Show excerpt
  drop_event => true # Optionally drop the event if it doesn't match } } output { # Output matched events to Elasticsearch if "grok_matched" in [tags] { elasticsearch { hosts => ["localhost:9200"] index => "logs" …
[5]8b60f094 E048 4234 B82c C82d957c87d013 facts
ctx:claims/beam/8b60f094-e048-4234-b82c-c82d957c87d0
- full textbeam-chunk
  text/plain1 KBdoc:beam/8b60f094-e048-4234-b82c-c82d957c87d0
  Show excerpt
  beats { port => 5044 } } filter { grok { match => { "message" => "%{TIMESTAMP_ISO8601:timestamp} %{LOGLEVEL:loglevel} %{GREEDYDATA:message}" } } } output { elasticsearch { hosts => ["http://elasticsearch-node1:9200",…
[6]Ba0220ff 7108 441d B142 5d1a6c2378d52 facts
ctx:claims/beam/ba0220ff-7108-441d-b142-5d1a6c2378d5
- full textbeam-chunk
  text/plain1020 Bdoc:beam/ba0220ff-7108-441d-b142-5d1a6c2378d5
  Show excerpt
  - name: Log metrics run: | cat metrics.log ``` ### Step 3: Configure Logstash Ensure Logstash is configured to read the `metrics.log` file and send the data to Elasticsearch. Create a Logstash configuration file named `l…
[7]Fd1597e6 53d1 4447 8c85 Acbd7fc9b0926 facts
ctx:claims/beam/fd1597e6-53d1-4447-8c85-acbd7fc9b092
- full textbeam-chunk
  text/plain1 KBdoc:beam/fd1597e6-53d1-4447-8c85-acbd7fc9b092
  Show excerpt
  - **Automated Alerts:** Configure automated alerts to notify security teams immediately upon detecting potential access violations. This can be done via email, SMS, or through a dedicated security information and event management (SIEM) …
[8]6dfc04d4 A85a 41e2 9f32 65e6e4aa91cd7 facts
ctx:claims/beam/6dfc04d4-a85a-41e2-9f32-65e6e4aa91cd
[9]D61f78c1 Ffce 415b A5ec 0a5b8180d07b3 facts
ctx:claims/beam/d61f78c1-ffce-415b-a5ec-0a5b8180d07b
- full textbeam-chunk
  text/plain1 KBdoc:beam/d61f78c1-ffce-415b-a5ec-0a5b8180d07b
  Show excerpt
  [Turn 9445] Assistant: Certainly! Setting up real-time monitoring and alerting with the ELK Stack (Elasticsearch, Logstash, Kibana) involves configuring each component to work together seamlessly. Below is a step-by-step guide to help you s…

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Grok Filter

Inbound mentions (15)

containsContains(2)

describesDescribes(2)

ex:containsEx:contains(2)

hasFilterHas Filter(2)

ex:containsGrokFilterEx:contains Grok Filter(1)

ex:hasComponentEx:has Component(1)

followsFollows(1)

hasFilterConfigurationHas Filter Configuration(1)

hasFilterSectionHas Filter Section(1)

usesUses(1)

usesGrokFilterUses Grok Filter(1)

Other facts (80)

Timeline

References (9)

See also

Keep researching

`contains`Contains(2)

`describes`Describes(2)

`ex:contains`Ex:contains(2)

`hasFilter`Has Filter(2)

`ex:containsGrokFilter`Ex:contains Grok Filter(1)

`ex:hasComponent`Ex:has Component(1)

`follows`Follows(1)

`hasFilterConfiguration`Has Filter Configuration(1)

`hasFilterSection`Has Filter Section(1)

`uses`Uses(1)

`usesGrokFilter`Uses Grok Filter(1)