NATS

When using NATS as input, gnmic consumes data from a specific NATS subject in event or proto format.

Multiple consumers can be created per gnmic instance (num-workers). All the workers join the same NATS queue group (queue) in order to load share the messages between the workers.

Multiple instances of gnmic with the same NATS input can be used to effectively consume the exported messages in parallel

The NATS input will export the received messages to the list of outputs configured under its outputs section.

inputs:
  input1:
    # string, required, specifies the type of input
    type: nats 
    # NATS subscriber name
    # If left empty, it will be populated with the string from flag --instance-name appended with `--nats-sub`.
    # If --instance-name is also empty, a random name is generated in the format `gnmic-$uuid`
    # note that each nats worker (subscriber) will get name=$name-$index
    name: ""
    # string, comma separated NATS servers addresses
    address: localhost:4222
    # The subject name gnmic NATS consumers subscribe to.
    subject: telemetry 
    # subscribe queue group all gnmic NATS input workers join, 
    # so that NATS server can load share the messages between them.
    queue: 
    # string, NATS username
    username: 
    # string, NATS password  
    password: 
    # duration, wait time before reconnection attempts
    connect-time-wait: 2s 
    # string, consumed message expected format, one of: proto, event
    format: event 
    # bool, enables extra logging
    debug: false
    # integer, number of nats consumers to be created
    num-workers: 1
    # integer, sets the size of the local buffer where received 
    # NATS messages are stored before being sent to outputs.
    # This value is set per worker. Defaults to 100 messages
    buffer-size: 100
    # []string, list of named outputs to export data to. 
    # Must be configured under root level `outputs` section
    outputs: