Filebeat: Merge "mqtt" input to master

CHANGELOG.next.asciidoc

@@ -113,6 +113,7 @@ https://github.com/elastic/beats/compare/v7.0.0-alpha2...master[Check the HEAD d
 - Add custom string mapping to CEF module to support Forcepoint NGFW {issue}14663[14663] {pull}15910[15910]
 - move create-[module,fileset,fields] to mage and enable in x-pack/filebeat {pull}15836[15836]
 - Add ECS tls and categorization fields to apache module. {issue}16032[16032] {pull}16121[16121]
+- Add MQTT input. {issue}15602[15602] {pull}16204[16204]
 
 *Heartbeat*
 

NOTICE.txt

@@ -1255,6 +1255,99 @@ LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 SOFTWARE.
 --------------------------------------------------------------------
+Dependency: github.com/eclipse/paho.mqtt.golang
+Revision: 0d940dd29fd24f905cd16b28b1209b4977b97e1a
+License type (autodetected): EPL-1.0
+./vendor/github.com/eclipse/paho.mqtt.golang/LICENSE:
+--------------------------------------------------------------------
+Eclipse Public License - v 1.0
+
+THE ACCOMPANYING PROGRAM IS PROVIDED UNDER THE TERMS OF THIS ECLIPSE PUBLIC LICENSE ("AGREEMENT"). ANY USE, REPRODUCTION OR DISTRIBUTION OF THE PROGRAM CONSTITUTES RECIPIENT'S ACCEPTANCE OF THIS AGREEMENT.
+
+1. DEFINITIONS
+
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+
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+
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+
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+
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+
+This Agreement is governed by the laws of the State of New York and the intellectual property laws of the United States of America. No party to this Agreement will bring a legal action under this Agreement more than one year after the cause of action arose. Each party waives its rights to a jury trial in any resulting litigation.
+--------------------------------------------------------------------
 Dependency: github.com/elastic/ecs
 Version: v1.4.0
 Revision: cc4b36eebec29975f57cd0475c3987c9bde5c15a
@@ -2698,6 +2791,35 @@ License type (autodetected): Apache-2.0
 Apache License 2.0
 
 
+--------------------------------------------------------------------
+Dependency: github.com/gorilla/websocket
+Revision: c3e18be99d19e6b3e8f1559eea2c161a665c4b6b
+License type (autodetected): BSD-2-Clause
+./vendor/github.com/gorilla/websocket/LICENSE:
+--------------------------------------------------------------------
+Copyright (c) 2013 The Gorilla WebSocket Authors. All rights reserved.
+
+Redistribution and use in source and binary forms, with or without
+modification, are permitted provided that the following conditions are met:
+
+  Redistributions of source code must retain the above copyright notice, this
+  list of conditions and the following disclaimer.
+
+  Redistributions in binary form must reproduce the above copyright notice,
+  this list of conditions and the following disclaimer in the documentation
+  and/or other materials provided with the distribution.
+
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
+ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
+FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
 --------------------------------------------------------------------
 Dependency: github.com/grpc-ecosystem/go-grpc-prometheus
 Revision: ae0d8660c5f2108ca70a3776dbe0fb53cf79f1da

dev-tools/generate_notice.py

@@ -309,6 +309,10 @@ def create_notice(filename, beat, copyright, vendor_dirs, csvfile, overrides=Non
     "Creative Commons Attribution-ShareAlike 4.0 International"
 ]
 
+ECLIPSE_PUBLIC_LICENSE_TITLES = [
+    "Eclipse Public License - v 1.0"
+]
+
 LGPL_3_LICENSE_TITLE = [
     "GNU LESSER GENERAL PUBLIC LICENSE Version 3"
 ]
@@ -348,16 +352,18 @@ def detect_license_summary(content):
         return "LGPL-3.0"
     if any(sentence in content[0:1500] for sentence in UNIVERSAL_PERMISSIVE_LICENSE_TITLES):
         return "UPL-1.0"
-
+    if any(sentence in content[0:1500] for sentence in ECLIPSE_PUBLIC_LICENSE_TITLES):
+        return "EPL-1.0"
     return "UNKNOWN"
 
 
 ACCEPTED_LICENSES = [
     "Apache-2.0",
-    "MIT",
     "BSD-4-Clause",
     "BSD-3-Clause",
     "BSD-2-Clause",
+    "EPL-1.0",
+    "MIT",
     "MPL-2.0",
     "UPL-1.0",
 ]

filebeat/docker-compose.yml

@@ -16,6 +16,8 @@ services:
       - KAFKA_PORT=9092
       - KIBANA_HOST=kibana
       - KIBANA_PORT=5601
+      - MOSQUITTO_HOST=mosquitto
+      - MOSQUITTO_PORT=1883
     working_dir: /go/src/github.com/elastic/beats/filebeat
     volumes:
       - ${PWD}/..:/go/src/github.com/elastic/beats/
@@ -31,6 +33,7 @@ services:
       elasticsearch: { condition: service_healthy }
       kafka:         { condition: service_healthy }
       kibana:        { condition: service_healthy }
+      mosquitto:     { condition: service_healthy }
       redis:         { condition: service_healthy }
 
   elasticsearch:
@@ -51,5 +54,10 @@ services:
       file: ${ES_BEATS}/testing/environments/${TESTING_ENVIRONMENT}.yml
       service: kibana
 
+  mosquitto:
+    build: ${ES_BEATS}/testing/environments/docker/mosquitto
+    expose:
+      - 1883
+
   redis:
     build: ${PWD}/input/redis/_meta

filebeat/docs/filebeat-options.asciidoc

@@ -51,6 +51,7 @@ You can configure {beatname_uc} to use the following inputs:
 * <<{beatname_lc}-input-docker>>
 * <<{beatname_lc}-input-tcp>>
 * <<{beatname_lc}-input-syslog>>
+* <<{beatname_lc}-input-mqtt>>
 * <<{beatname_lc}-input-s3>>
 * <<{beatname_lc}-input-netflow>>
 * <<{beatname_lc}-input-google-pubsub>>
@@ -75,6 +76,8 @@ include::inputs/input-tcp.asciidoc[]
 
 include::inputs/input-syslog.asciidoc[]
 
+include::inputs/input-mqtt.asciidoc[]
+
 include::../../x-pack/filebeat/docs/inputs/input-aws-s3.asciidoc[]
 
 include::../../x-pack/filebeat/docs/inputs/input-netflow.asciidoc[]

filebeat/docs/inputs/input-mqtt.asciidoc

@@ -0,0 +1,81 @@
+:type: mqtt
+
+[id="{beatname_lc}-input-{type}"]
+=== MQTT input
+
+++++
+<titleabbrev>MQTT</titleabbrev>
+++++
+
+Use the `MQTT` input to read data transmitted using lightweight messaging protocol
+for small and mobile devices, optimized for high-latency or unreliable networks.
+
+This input connects to the MQTT broker, subscribes to selected topics and parses data
+into common message lines. Everything happens before line filtering, multiline, and JSON decoding,
+so this input can be used in combination with those settings.
+
+Example configuration:
+
+["source","yaml",subs="attributes"]
+----
+{beatname_lc}.inputs:
+- type: mqtt
+  hosts: <1>
+    - tcp://broker:1883
+    - ssl://secure_broker:8883
+  topics: <2>
+    - sample_topic
+----
+
+<1> `hosts` are required.
+
+<2> `paths` are required.
+
+All other settings are optional.
+
+==== Configuration options
+
+The `mqtt` input supports the following configuration options plus the
+<<{beatname_lc}-input-{type}-common-options>> described later.
+
+===== `hosts`
+
+A list of MQTT brokers to connect to.
+
+===== `topics`
+
+A list of topics to subscribe to and read from.
+
+===== `qos`
+
+An agreement level between the sender of a message and the receiver of a message that defines the guarantee of delivery.
+
+There are 3 QoS levels in MQTT:
+
+* At most once (`0`),
+* At least once (`1`),
+* Exactly once (`2`).
+
+===== `client_id`
+
+A unique identifier of each MQTT client connecting to a MQTT broker.
+
+===== `username`
+
+A client username used for authentication provided on the application level by the MQTT protocol.
+
+===== `password`
+
+A client password used for authentication provided on the application level by the MQTT protocol.
+
+===== `ssl`
+
+Configuration options for SSL parameters like the certificate, key and the certificate authorities
+to use.
+
+See <<configuration-ssl>> for more information.
+
+[id="{beatname_lc}-input-{type}-common-options"]
+include::../inputs/input-common-options.asciidoc[]
+
+:type!: