94 lines
3.8 KiB
Markdown
94 lines
3.8 KiB
Markdown
# Google Cloud PubSub Input Plugin
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The GCP PubSub plugin ingests metrics from [Google Cloud PubSub][pubsub]
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and creates metrics using one of the supported [input data formats][].
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### Configuration
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```toml
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[[inputs.pubsub]]
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## Required. Name of Google Cloud Platform (GCP) Project that owns
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## the given PubSub subscription.
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project = "my-project"
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## Required. Name of PubSub subscription to ingest metrics from.
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subscription = "my-subscription"
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## Required. Data format to consume.
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## Each data format has its own unique set of configuration options.
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## Read more about them here:
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## https://github.com/influxdata/telegraf/blob/master/docs/DATA_FORMATS_INPUT.md
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data_format = "influx"
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## Optional. Filepath for GCP credentials JSON file to authorize calls to
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## PubSub APIs. If not set explicitly, Telegraf will attempt to use
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## Application Default Credentials, which is preferred.
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# credentials_file = "path/to/my/creds.json"
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## Optional. Number of seconds to wait before attempting to restart the
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## PubSub subscription receiver after an unexpected error.
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## If the streaming pull for a PubSub Subscription fails (receiver),
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## the agent attempts to restart receiving messages after this many seconds.
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# retry_delay_seconds = 5
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## Optional. Maximum byte length of a message to consume.
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## Larger messages are dropped with an error. If less than 0 or unspecified,
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## treated as no limit.
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# max_message_len = 1000000
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## Optional. Maximum messages to read from PubSub that have not been written
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## to an output. Defaults to %d.
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## For best throughput set based on the number of metrics within
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## each message and the size of the output's metric_batch_size.
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##
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## For example, if each message contains 10 metrics and the output
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## metric_batch_size is 1000, setting this to 100 will ensure that a
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## full batch is collected and the write is triggered immediately without
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## waiting until the next flush_interval.
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# max_undelivered_messages = 1000
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## The following are optional Subscription ReceiveSettings in PubSub.
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## Read more about these values:
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## https://godoc.org/cloud.google.com/go/pubsub#ReceiveSettings
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## Optional. Maximum number of seconds for which a PubSub subscription
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## should auto-extend the PubSub ACK deadline for each message. If less than
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## 0, auto-extension is disabled.
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# max_extension = 0
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## Optional. Maximum number of unprocessed messages in PubSub
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## (unacknowledged but not yet expired in PubSub).
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## A value of 0 is treated as the default PubSub value.
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## Negative values will be treated as unlimited.
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# max_outstanding_messages = 0
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## Optional. Maximum size in bytes of unprocessed messages in PubSub
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## (unacknowledged but not yet expired in PubSub).
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## A value of 0 is treated as the default PubSub value.
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## Negative values will be treated as unlimited.
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# max_outstanding_bytes = 0
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## Optional. Max number of goroutines a PubSub Subscription receiver can spawn
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## to pull messages from PubSub concurrently. This limit applies to each
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## subscription separately and is treated as the PubSub default if less than
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## 1. Note this setting does not limit the number of messages that can be
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## processed concurrently (use "max_outstanding_messages" instead).
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# max_receiver_go_routines = 0
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```
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### Multiple Subscriptions and Topics
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This plugin assumes you have already created a PULL subscription for a given
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PubSub topic. To learn how to do so, see [how to create a subscription][pubsub create sub].
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Each plugin agent can listen to one subscription at a time, so you will
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need to run multiple instances of the plugin to pull messages from multiple
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subscriptions/topics.
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[pubsub]: https://cloud.google.com/pubsub
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[pubsub create sub]: https://cloud.google.com/pubsub/docs/admin#create_a_pull_subscription
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[input data formats]: /docs/DATA_FORMATS_INPUT.md
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