Google Cloud Pub/Sub Output Plugin

A basic configuration which only includes a project, topic, and JSON key file:

output {
  google_pubsub {
    # Required attributes
    project_id => "my_project"
    topic => "my_topic"

    # Optional if you're using app default credentials
    json_key_file => "service_account_key.json"
  }
}

If you find that uploads are going too slowly, you can increase the message batching:

output {
  google_pubsub {
    project_id => "my_project"
    topic => "my_topic"
    json_key_file => "service_account_key.json"

    # Options for configuring the upload
    message_count_threshold => 1000
    delay_threshold_secs => 10
    request_byte_threshold => 5000000
  }
}

You can attach additional attributes to each request. For example, you could attach a datacenter label to a log message to help with debugging:

output {
  google_pubsub {
    project_id => "my_project"
    topic => "my_topic"
    json_key_file => "service_account_key.json"


    attributes => {"origin" => "pacific-datacenter"}
  }
}

You can use codecs with this plugin to change the body of the events:

output {
  google_pubsub {
    project_id => "my_project"
    topic => "my_topic"
    json_key_file => "service_account_key.json"


    codec => plain {format => "%{[time]}: %{[message]}"}
  }
}

Google Cloud Project ID (name, not number).

Google Cloud Pub/Sub Topic. You must create the topic manually before running this plugin.

The path to the key to authenticate your user to the bucket. This service user must have the pubsub.topics.publish permission so it can publish to the topic.

If Logstash is running within Google Compute Engine and no json_key_file is defined, the plugin will use GCE’s Application Default Credentials. Outside of GCE, you must to specify a Service Account JSON key file.

Send the batch once this delay has passed, from the time the first message is queued. Must be greater than 0.

Once this many messages are queued, send all the messages in a single call, even if the delay threshold hasn’t elapsed yet. Must be < 1000. A value of 0 will cause messages to instantly be sent but will reduce total throughput due to overhead.

Once the number of bytes in the batched request reaches this threshold, send all of the messages in a single call, even if neither the delay or message count thresholds have been exceeded yet. This includes full message payload size, including any attributes set.

Attributes to add to the message in key: value formats. Keys and values MUST be strings.

The codec used for output data. Output codecs are a convenient method for encoding your data before it leaves the output without needing a separate filter in your Logstash pipeline.

Disable or enable metric logging for this specific plugin instance. By default we record all the metrics we can, but you can disable metrics collection for a specific plugin.

Add a unique ID to the plugin configuration. If no ID is specified, Logstash will generate one. It is strongly recommended to set this ID in your configuration. This is particularly useful when you have two or more plugins of the same type. For example, if you have 2 google_pubsub outputs. Adding a named ID in this case will help in monitoring Logstash when using the monitoring APIs.

output {
  google_pubsub {
    id => "my_plugin_id"
  }
}