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    Configure Pub/Sub in Application Design Center

    Pub/Sub is an asynchronous and scalable messaging service that decouples services producing messages from services processing those messages. For more information, see What is Pub/Sub?

    This document describes the connections and parameters you can configure when using App Design Center to create a Pub/Sub topic and subscription. The configuration parameters are based on the terraform-google-pubsub Terraform module.

    Component connections

    The following table includes the components that you can connect to a Pub/Sub topic or subscription, and the resulting updates to your application and its generated Terraform code.

    Connected component

    Application updates

    Background information

    Compute Engine instance template

    • The Compute Engine instances can publish to and receive messages from the Pub/Sub topic.
    • The Pub/Sub topic ID is added to the Compute Engine instance template metadata.
    Instance templates

    Service account

    • The service account can manage Pub/Sub topics, and pull messages from subscriptions.
    • The roles/pubsub.editor role is added to the service account.
    • The service account name and email information is added to the Pub/Sub pull subscription.
    Access control with IAM

    BigQuery

    • The Pub/Sub subscription can write messages to the BigQuery dataset.
    • The BigQuery dataset information is added to the BigQuery subscription fields.
    BigQuery subscriptions

    Cloud Run

    • The Cloud Run service can receive messages or publish to the Pub/Sub topic.
    • The Pub/Sub topic ID is added to the Cloud Run environment variables.
    • The roles/pubsub.publisher and roles/pubsub.subscriber roles are added to the Cloud Run service account.
    • The Cloud Run service is added to the Pub/Sub push and pull subscription fields.
    Use Pub/Sub with Cloud Run tutorial

    Cloud Storage

    • The Pub/Sub subscription can write messages to the Cloud Storage bucket.
    • The Cloud Storage bucket information is added to the Pub/Sub subscription fields.
    Cloud Storage subscriptions

    Required configuration parameters

    If your template includes a Pub/Sub component, you must configure the following parameters before you deploy.

    Parameter name

    Description and constraints

    Background information

    Project ID

    The project where you want to deploy the Pub/Sub resource.

    		 Configure components

    Topic

    		 name Guidelines to name a topic, subscription, schema, or snapshot

    Optional configuration parameters

    The following parameters are optional. To display advanced parameters, in the Configurationarea, select Show advanced fields.

    Feature

    Parameter name

    Description and constraint information

    Background information

    Create Topic
    By default, a topic is created. Clear the checkbox if you don't want to create a topic.
    Create a topic
    Create Subscriptions
    By default, a subscription is created. Clear the checkbox if you don't want to create a subscription.
    Subscription overview

    Topic Labels

    Key
    labels
    Reporting usage with labels
    Value
    labels
    Reporting usage with labels

    Push Subscriptions

    Name
    name
    Guidelines to name a topic, subscription, schema, or snapshot
    Ack Deadline Seconds
    ackDeadlineSeconds
    Acknowledgment deadline
    Push Endpoint
    pushEndpoint
    Endpoints
    X-goog-version
    The Pub/Sub API format of the pushed message. For example, v1beta1.
    attributes
    OIDC Service Account email
    serviceAccountEmail
    Authentication
    Audience
    audience
    Authentication
    Expiration Policy
    expirationPolicy
    Expiration period
    Dead Letter Topic
    deadLetterTopic
    Dead letter topic
    Retain Acked Messages
    retainAckedMessages
    Retain acknowledged messages
    Message Retention Duration
    messageRetentionDuration
    Message retention duration
    Max Delivery Attempts
    maxDeliveryAttempts
    Dead letter topic
    Maximum Backoff
    maximumBackoff
    Retry policy
    Minimum Backoff
    minimumBackoff
    Retry policy
    Filter
    filter
    Subscription filter
    Enable Message Ordering
    enableMessageOrdering
    Message ordering

    Pull Subscriptions

    Name
    name
    Guidelines to name a topic, subscription, schema, or snapshot
    Ack Deadline Seconds
    ackDeadlineSeconds
    Acknowledgment deadline
    Dead Letter Topic
    deadLetterTopic
    Dead letter topic
    Max Delivery Attempts
    maxDeliveryAttempts
    Dead letter topic
    Retain Acked Messages
    retainAckedMessages
    Retain acknowledged messages
    Message Retention Duration
    messageRetentionDuration
    Message retention duration
    Maximum Backoff
    maximumBackoff
    Retry policy
    Minimum Backoff
    minimumBackoff
    Retry policy
    Filter
    filter
    Subscription filter
    Enable Message Ordering
    enableMessageOrdering
    Message ordering
    Service Account
    Enable Exactly Once Delivery
    enableExactlyOnceDelivery
    Exactly-once delivery

    BigQuery Subscriptions

    Name
    name
    Guidelines to name a topic, subscription, schema, or snapshot
    Table
    table
    Create BigQuery subscriptions
    Use Topic Schema
    useTopicSchema
    Use topic subscription
    Use Table Schema
    useTableSchema
    Use table schema
    Write Metadata
    writeMetadata
    Write metadata
    Drop Unknown Fields
    dropUnknownFields
    Drop unknown fields
    Ack Deadline Seconds
    ackDeadlineSeconds
    Acknowledgment deadline
    Retain Acked Messages
    retainAckedMessages
    Retain acknowledged messages
    Message Retention Duration
    messageRetentionDuration
    Message retention duration
    Enable Message Ordering
    enableMessageOrdering
    Message ordering
    Expiration Policy
    expirationPolicy
    Expiration period
    Filter
    filter
    Subscription filter
    Dead Letter Topic
    deadLetterTopic
    Dead letter topic
    Maximum Backoff
    maximumBackoff
    Retry policy
    Minimum Backoff
    minimumBackoff
    Retry policy

    Cloud Storage Subscriptions

    Name
    name
    Guidelines to name a topic, subscription, schema, or snapshot
    Bucket
    bucket
    Bucket name
    Filename Prefix
    filenamePrefix
    Filename prefix, suffix, and datetime
    Filename Suffix
    filenameSuffix
    Filename prefix, suffix, and datetime
    Filename Datetime Format
    filenameDatetimeFormat
    Filename prefix, suffix, and datetime
    Max Duration
    maxDuration
    File batching
    Max Bytes
    maxBytes
    File batching
    Max Messages
    maxMessages
    File batching
    Output Format
    textConfig or avroConfig
    File format
    Write Metadata
    writeMetadata
    Write metadata
    Use Topic Schema
    useTopicSchema
    Use topic schema
    Ack Deadline Seconds
    ackDeadlineSeconds
    Acknowledgment deadline
    Retain Acked Messages
    Retain acknowledged messages
    Message Retention Duration
    messageRetentionDuration
    Message retention duration
    Enable Message Ordering
    enableMessageOrdering
    Message ordering
    Expiration Policy
    expirationPolicy
    Expiration period
    Filter
    filter
    Subscription filter
    Dead Letter Topic
    deadLetterTopic
    Dead letter topic
    Maximum Backoff
    maximumBackoff
    Retry policy
    Minimum Backoff
    minimumBackoff
    Retry policy

    Subscription Labels

    Key
    labels
    Reporting usage with labels
    Value
    labels
    Reporting usage with labels
    Topic Message Retention Duration
    topicMessageRetentionDuration
    Message retention duration
    Topic KMS Key Name
    kmsKeyName
    Use a customer-managed encryption key (CMEK)
    Grant BigQuery Project Roles
    By default, the BigQuery Metadata Viewer and BigQuery Data Editor roles are granted to default Pub/Sub service account. If you don't want to grant these roles, clear the checkbox.
    Assign BigQuery roles to the Pub/Sub service account
    Grant Token Creator
    By default, the Service Account Token Creator role is granted to default Pub/Sub service account. If you don't want to grant this role, clear the checkbox.
    Set up authentication for Pub/Sub

    Schema

    Name
    name
    Important information about schemas
    Type
    type
    Types of schemas
    Definition
    definition
    Types of schemas
    Encoding
    encoding
    Guidelines to associate a schema with a topic
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