pubsub

Google Cloud Pub/Sub Module

This module allows managing a single Pub/Sub topic, including multiple subscriptions and IAM bindings at the topic and subscriptions levels.

Examples

Simple topic with IAM

module "pubsub" {
  source     = "./modules/pubsub"
  project_id = "my-project"
  name       = "my-topic"
  iam = {
    "roles/pubsub.viewer"     = ["group:[email protected]"]
    "roles/pubsub.subscriber" = ["user:[email protected]"]
  }
}
# tftest modules=1 resources=3

Subscriptions

Subscriptions are defined with the subscriptions variable, allowing optional configuration of per-subscription defaults. Push subscriptions need extra configuration, shown in the following example.

module "pubsub" {
  source     = "./modules/pubsub"
  project_id = "my-project"
  name       = "my-topic"
  subscriptions = {
    test-pull = null
    test-pull-override = {
      labels = { test = "override" }
      options = {
        ack_deadline_seconds       = null
        message_retention_duration = null
        retain_acked_messages      = true
        expiration_policy_ttl      = null
      }
    }
  }
}
# tftest modules=1 resources=3

Push subscriptions

Push subscriptions need extra configuration in the push_configs variable.

module "pubsub" {
  source     = "./modules/pubsub"
  project_id = "my-project"
  name       = "my-topic"
  subscriptions = {
    test-push = null
  }
  push_configs = {
    test-push = {
      endpoint   = "https://example.com/foo"
      attributes = null
      oidc_token = null
    }
  }
}
# tftest modules=1 resources=2

Subscriptions with IAM

module "pubsub" {
  source     = "./modules/pubsub"
  project_id = "my-project"
  name       = "my-topic"
  subscriptions = {
    test-1 = null
    test-1 = null
  }
  subscription_iam = {
    test-1 = {
      "roles/pubsub.subscriber" = ["user:[email protected]"]
    }
  }
}
# tftest modules=1 resources=3

Variables

name	description	type	required	default
name	PubSub topic name.	string	✓
project_id	Project used for resources.	string	✓
dead_letter_configs	Per-subscription dead letter policy configuration.	map(object({…}))		{}
defaults	Subscription defaults for options.	object({…})		{…}
iam	IAM bindings for topic in {ROLE => [MEMBERS]} format.	map(list(string))		{}
kms_key	KMS customer managed encryption key.	string		null
labels	Labels.	map(string)		{}
push_configs	Push subscription configurations.	map(object({…}))		{}
regions	List of regions used to set persistence policy.	list(string)		[]
subscription_iam	IAM bindings for subscriptions in {SUBSCRIPTION => {ROLE => [MEMBERS]}} format.	map(map(list(string)))		{}
subscriptions	Topic subscriptions. Also define push configs for push subscriptions. If options is set to null subscription defaults will be used. Labels default to topic labels if set to null.	map(object({…}))		{}

Outputs

name	description	sensitive
id	Topic id.
subscription_id	Subscription ids.
subscriptions	Subscription resources.
topic	Topic resource.