Cherry-pick #17550 to 7.x: [Filebeat] Improve ECS categorization field mappings for nats module

CHANGELOG.next.asciidoc

@@ -326,6 +326,7 @@ https://github.com/elastic/beats/compare/v7.0.0-alpha2...master[Check the HEAD d
 - Improve ECS categorization field mappings for mysql module. {issue}16172[16172] {pull}17491[17491]
 - Release Google Cloud module as GA. {pull}17511[17511]
 - Update filebeat httpjson input to support pagination via Header and Okta module. {pull}16354[16354]
+- Improve ECS categorization field mappings for nats module. {issue}16173[16173] {pull}17550[17550]
 
 *Heartbeat*
 

filebeat/module/nats/log/ingest/pipeline.yml

@@ -0,0 +1,181 @@
+description: Pipeline for parsing nats log logs
+processors:
+- grok:
+    field: message
+    patterns:
+    - \[%{POSINT:process.pid}\]( %{NATSTIME:nats.log.timestamp})? \[%{NATSLOGLEVEL:log.level}\]
+      %{GREEDYDATA:nats.log.info}
+    pattern_definitions:
+      NATSTIME: '%{YEAR}/%{MONTHNUM}/%{MONTHDAY} %{TIME}'
+      NATSLOGLEVEL: (INF|DBG|WRN|ERR|FTL|TRC)
+    ignore_missing: true
+- grok:
+    field: nats.log.info
+    patterns:
+    - '%{IPV4:client.ip}:%{POSINT:client.port} - cid:%{POSINT:nats.log.client.id}
+      - %{GREEDYDATA:nats.log.msg.info}'
+    - '%{GREEDYDATA:nats.log.msg.data}'
+    ignore_missing: true
+- grok:
+    field: nats.log.msg.info
+    patterns:
+    - '%{NATSDIRECTION:network.direction} %{NATSPAYLOAD:nats.log.msg.type}: \[%{GREEDYDATA:nats.log.msg.payload}\]'
+    - '%{NATSDIRECTION:network.direction} \[%{NATSNOINFO:nats.log.msg.type}\]'
+    - '%{NATSDIRECTION:network.direction} \[%{NATSUNSUB:nats.log.msg.type}\s+%{POSINT:nats.log.msg.sid}(\s+%{POSINT:nats.log.msg.max_messages})?\]'
+    - '%{NATSDIRECTION:network.direction} \[%{NATSPUB:nats.log.msg.type}\s+%{NOTSPACE:nats.log.msg.subject}(\s+%{NOTSPACE:nats.log.msg.reply_to})?\s+%{POSINT:nats.log.msg.bytes}\]'
+    - '%{NATSDIRECTION:network.direction} \[%{NATSSUB:nats.log.msg.type}\s+%{NOTSPACE:nats.log.msg.subject}(\s+%{NOTSPACE:nats.log.msg.queue_group})?\s+%{POSINT:nats.log.msg.sid}\]'
+    - '%{NATSDIRECTION:network.direction} \[%{NATSMSG:nats.log.msg.type}\s+%{NOTSPACE:nats.log.msg.subject}\s+%{POSINT:nats.log.msg.sid}(\s+%{NOTSPACE:nats.log.msg.reply_to})?\s+%{POSINT:nats.log.msg.bytes}\]'
+    - '%{NATSDIRECTION:network.direction} \[%{NATSCONNECTION:nats.log.msg.type}\s+%{GREEDYDATA:nats.log.msg.data}\]'
+    - '%{NATSDIRECTION:network.direction} \[%{NATSERROR:nats.log.msg.type}\s+%{GREEDYDATA:nats.log.msg.error\]'
+    - '%{GREEDYDATA:nats.log.msg.data}'
+    pattern_definitions:
+      NATSDIRECTION: (<<-|->>)
+      NATSMSG: MSG
+      NATSPUB: PUB
+      NATSSUB: SUB
+      NATSUNSUB: UNSUB
+      NATSPAYLOAD: MSG_PAYLOAD
+      NATSERROR: -ERROR
+      NATSPING: PING
+      NATSPONG: PONG
+      NATSOK: OK
+      NATSCONNECT: CONNECT
+      NATSINFO: INFO
+      NATSCONNECTION: (?:%{NATSCONNECT}|%{NATSINFO})
+      NATSNOINFO: (?:%{NATSPING}|%{NATSPONG}|%{NATSOK})
+    ignore_missing: true
+- remove:
+    field: nats.log.info
+- remove:
+    field: nats.log.msg.info
+    ignore_missing: true
+- remove:
+    field: nats.log.msg.payload
+    ignore_missing: true
+- remove:
+    field: message
+- rename:
+    field: nats.log.msg.data
+    target_field: message
+    ignore_missing: true
+- script:
+    lang: painless
+    source: |-
+      if (ctx.log.level == params.inf) {
+                ctx.log.level = params.info;
+              } else if (ctx.log.level == params.dbg) {
+                ctx.log.level = params.debug;
+              } else if (ctx.log.level == params.wrn) {
+                ctx.log.level = params.warning;
+              } else if (ctx.log.level == params.err) {
+                ctx.log.level = params.error;
+              } else if (ctx.log.level == params.ftl) {
+                ctx.log.level = params.fatal;
+              } else if (ctx.log.level == params.trc) {
+                ctx.log.level = params.trace;
+              }
+    params:
+      inf: INF
+      info: info
+      dbg: DBG
+      debug: debug
+      wrn: WRN
+      warning: warning
+      err: ERR
+      error: error
+      ftl: FTL
+      fatal: fatal
+      trc: TRC
+      trace: trace
+- script:
+    lang: painless
+    source: |-
+      if (ctx.nats.log.msg.type == params.msg) {
+                ctx.nats.log.msg.type = params.message;
+              } else if (ctx.nats.log.msg.type == params.pub) {
+                ctx.nats.log.msg.type = params.publish;
+              } else if (ctx.nats.log.msg.type == params.sub) {
+                ctx.nats.log.msg.type = params.subscribe;
+              } else if (ctx.nats.log.msg.type == params.unsub) {
+                ctx.nats.log.msg.type = params.unsubscribe;
+              } else if (ctx.nats.log.msg.type == params.msg_payload) {
+                ctx.nats.log.msg.type = params.payload;
+              } else if (ctx.nats.log.msg.type == params.err) {
+                ctx.nats.log.msg.type = params.error;
+              } else if (ctx.nats.log.msg.type == params.pi) {
+                ctx.nats.log.msg.type = params.ping;
+              } else if (ctx.nats.log.msg.type == params.po) {
+                ctx.nats.log.msg.type = params.pong;
+              } else if (ctx.nats.log.msg.type == params.ok) {
+                ctx.nats.log.msg.type = params.acknowledge;
+              } else if (ctx.nats.log.msg.type == params.connect) {
+                ctx.nats.log.msg.type = params.connection;
+              } else if (ctx.nats.log.msg.type == params.info) {
+                ctx.nats.log.msg.type = params.information;
+              }
+    params:
+      msg: MSG
+      message: message
+      pub: PUB
+      publish: publish
+      sub: SUB
+      subscribe: subscribe
+      unsub: UNSUB
+      unsubscribe: unsubscribe
+      msg_payload: MSG_PAYLOAD
+      payload: payload
+      err: -ERROR
+      error: error
+      pi: PING
+      ping: ping
+      po: PONG
+      pong: pong
+      ok: OK
+      acknowledge: acknowledge
+      connect: CONNECT
+      connection: connection
+      info: INFO
+      information: information
+    if: ctx.nats.log.msg?.type != null
+- script:
+    lang: painless
+    source: |-
+      if (ctx.network.direction == params.in) {
+                ctx.network.direction = params.inbound;
+              } else if (ctx.network.direction == params.out) {
+                ctx.network.direction = params.outbound;
+              }
+    params:
+      in: <<-
+      inbound: inbound
+      out: ->>
+      outbound: outbound
+    if: ctx.network?.direction != null
+- rename:
+    field: '@timestamp'
+    target_field: event.created
+- date:
+    field: nats.log.timestamp
+    target_field: '@timestamp'
+    formats:
+    - yyyy/MM/dd HH:mm:ss.SSSSSS
+- remove:
+    field: nats.log.timestamp
+- set:
+    field: event.kind
+    value: event
+- append:
+    field: event.type
+    value: info
+- append:
+    field: event.type
+    value: error
+    if: "ctx?.log?.level != null && (ctx.log.level == 'error' || ctx.log.level == 'fatal')"
+- append:
+    field: related.ip
+    value: "{{client.ip}}"
+    if: "ctx?.client?.ip != null"
+on_failure:
+- set:
+    field: error.message
+    value: '{{ _ingest.on_failure_message }}'

filebeat/module/nats/log/manifest.yml

@@ -11,5 +11,5 @@ var:
       # See more on https://nats.io/documentation/server/gnatsd-logging/
       - /var/log/nats/nats.log*
 
-ingest_pipeline: ingest/pipeline.json
+ingest_pipeline: ingest/pipeline.yml
 input: config/log.yml