MQTT input
editMQTT input
editUse 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:
filebeat.inputs: - type: mqtt hosts: - tcp://broker:1883 - ssl://secure_broker:8883 topics: - sample_topic
All other settings are optional.
Configuration options
editThe mqtt
input supports the following configuration options plus the
Common options described later.
hosts
editA list of MQTT brokers to connect to.
topics
editA list of topics to subscribe to and read from.
qos
editAn 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
editA unique identifier of each MQTT client connecting to a MQTT broker.
username
editA client username used for authentication provided on the application level by the MQTT protocol.
password
editA client password used for authentication provided on the application level by the MQTT protocol.
Common options
editThe following configuration options are supported by all inputs.
enabled
editUse the enabled
option to enable and disable inputs. By default, enabled is
set to true.
tags
editA list of tags that Filebeat includes in the tags
field of each published
event. Tags make it easy to select specific events in Kibana or apply
conditional filtering in Logstash. These tags will be appended to the list of
tags specified in the general configuration.
Example:
filebeat.inputs: - type: mqtt . . . tags: ["json"]
fields
editOptional fields that you can specify to add additional information to the
output. For example, you might add fields that you can use for filtering log
data. Fields can be scalar values, arrays, dictionaries, or any nested
combination of these. By default, the fields that you specify here will be
grouped under a fields
sub-dictionary in the output document. To store the
custom fields as top-level fields, set the fields_under_root
option to true.
If a duplicate field is declared in the general configuration, then its value
will be overwritten by the value declared here.
filebeat.inputs: - type: mqtt . . . fields: app_id: query_engine_12
fields_under_root
editIf this option is set to true, the custom
fields are stored as top-level fields in
the output document instead of being grouped under a fields
sub-dictionary. If
the custom field names conflict with other field names added by Filebeat,
then the custom fields overwrite the other fields.
processors
editA list of processors to apply to the input data.
See Processors for information about specifying processors in your config.
pipeline
editThe ingest pipeline ID to set for the events generated by this input.
The pipeline ID can also be configured in the Elasticsearch output, but this option usually results in simpler configuration files. If the pipeline is configured both in the input and output, the option from the input is used.
keep_null
editIf this option is set to true, fields with null
values will be published in
the output document. By default, keep_null
is set to false
.
index
editIf present, this formatted string overrides the index for events from this input
(for elasticsearch outputs), or sets the raw_index
field of the event’s
metadata (for other outputs). This string can only refer to the agent name and
version and the event timestamp; for access to dynamic fields, use
output.elasticsearch.index
or a processor.
Example value: "%{[agent.name]}-myindex-%{+yyyy.MM.dd}"
might
expand to "filebeat-myindex-2019.11.01"
.
publisher_pipeline.disable_host
editBy default, all events contain host.name
. This option can be set to true
to
disable the addition of this field to all events. The default value is false
.