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    Change subscription types

    After you create a subscription, you can change the delivery method to push, pull, or export.

    Before you begin

    Required roles and permissions

    To get the permissions that you need to change subscription types and manage them, ask your administrator to grant you the Pub/Sub Editor ( roles/pubsub.editor ) IAM role on your topic or project. For more information about granting roles, see Manage access to projects, folders, and organizations .

    This predefined role contains the permissions required to change subscription types and manage them. To see the exact permissions that are required, expand the Required permissionssection:

    Required permissions

    The following permissions are required to change subscription types and manage them:

    • Pull from a subscription: pubsub.subscriptions.consume
    • Create a subscription: pubsub.subscriptions.create
    • Delete a subscription: pubsub.subscriptions.delete
    • Get a subscription: pubsub.subscriptions.get
    • List a subscription: pubsub.subscriptions.list
    • Update a subscription: pubsub.subscriptions.update
    • Attach a subscription to a topic: pubsub.topics.attachSubscription
    • Get the IAM policy for a subscription: pubsub.subscriptions.getIamPolicy
    • Configure the IAM policy for a subscription: pubsub.subscriptions.setIamPolicy

    You might also be able to get these permissions with custom roles or other predefined roles .

    You can configure access control at the project level and at the individual resource level. You can create a subscription in one project and attach it to a topic located in a different project. Ensure that you have the required permissions for each project.

    Modify delivery methods

    You can switch between different subscription types.

    Console

    To modify a subscription, complete the following steps.

    1. In the Google Cloud console, go to the Subscriptionspage.

      Go to Subscriptions

    2. Click next to the subscription to update.
    3. In the Delivery type, choose a delivery option.
    4. Fill in other subscription properties as required.
    5. Click Update.

    gcloud

    1. In the Google Cloud console, activate Cloud Shell.

      Activate Cloud Shell

      At the bottom of the Google Cloud console, a Cloud Shell session starts and displays a command-line prompt. Cloud Shell is a shell environment with the Google Cloud CLI already installed and with values already set for your current project. It can take a few seconds for the session to initialize.

    2. To modify the push endpoint URL, run the gcloud pubsub subscriptions modify-push-config command:

      gcloud  
pubsub  
subscriptions  
modify-push-config  
 SUBSCRIPTION_ID 
  
 \ 
  
--push-endpoint = 
 PUSH_ENDPOINT

      If the subscription is already using pull delivery, setting the push endpoint switches the delivery method to push delivery.

      You can switch from push to pull delivery by changing the push endpoint to an empty string.

    REST

    To modify the push configurations of a subscription, use the projects.subscriptions.modifyPushConfig method:

    Request:

    The request must be authenticated with an access token in the Authorization header. To obtain an access token for the current Application Default Credentials: gcloud auth application-default print-access-token .

    POST https://pubsub.googleapis.com/v1/projects/ PROJECT_ID 
/subscriptions/ SUBSCRIPTION_ID 
:modifyPushConfig
Authorization: Bearer ACCESS_TOKEN

    Request body:

    {
"pushConfig": {
  "pushEndpoint": " PUSH_ENDPOINT 
"
}
}

    Where:

  • PROJECT_ID is your project ID.
  • SUBSCRIPTION_ID is your subscription ID.
  • PUSH_ENDPOINT is a modified URL to you want to apply as your new push endpoint. For example, https://myproject.appspot.com/myhandler .

    • Response:

    If the request is successful, the response is an empty JSON object.

    C++

    Before trying this sample, follow the C++ setup instructions in Quickstart: Using Client Libraries . For more information, see the Pub/Sub C++ API reference documentation .

      namespace 
  
 pubsub_admin 
  
 = 
  
 :: 
 google 
 :: 
 cloud 
 :: 
 pubsub_admin 
 ; 
 namespace 
  
 pubsub 
  
 = 
  
 :: 
 google 
 :: 
 cloud 
 :: 
 pubsub 
 ; 
 []( 
 pubsub_admin 
 :: 
 SubscriptionAdminClient 
  
 client 
 , 
  
 std 
 :: 
 string 
  
 const 
&  
 project_id 
 , 
  
 std 
 :: 
 string 
  
 const 
&  
 subscription_id 
 , 
  
 std 
 :: 
 string 
  
 const 
&  
 endpoint 
 ) 
  
 { 
  
 google 
 :: 
 pubsub 
 :: 
 v1 
 :: 
 ModifyPushConfigRequest 
  
 request 
 ; 
  
 request 
 . 
 set_subscription 
 ( 
  
 pubsub 
 :: 
 Subscription 
 ( 
 project_id 
 , 
  
 subscription_id 
 ). 
 FullName 
 ()); 
  
 request 
 . 
 mutable_push_config 
 () 
 - 
> set_push_endpoint 
 ( 
 endpoint 
 ); 
  
 auto 
  
 status 
  
 = 
  
 client 
 . 
 ModifyPushConfig 
 ( 
 request 
 ); 
  
 if 
  
 ( 
 ! 
 status 
 . 
 ok 
 ()) 
  
 throw 
  
 std 
 :: 
 runtime_error 
 ( 
 status 
 . 
 message 
 ()); 
  
 std 
 :: 
 cout 
 << 
 "The subscription push configuration was successfully" 
 << 
 " modified 
 \n 
 " 
 ; 
 }

    C#

    Before trying this sample, follow the C# setup instructions in Quickstart: Using Client Libraries . For more information, see the Pub/Sub C# API reference documentation .

      using 
  
  Google.Cloud.PubSub.V1 
 
 ; 
 public 
  
 class 
  
 UpdatePushConfigurationSample 
 { 
  
 public 
  
 void 
  
 UpdatePushConfiguration 
 ( 
 string 
  
 projectId 
 , 
  
 string 
  
 subscriptionId 
 , 
  
 string 
  
 pushEndpoint 
 ) 
  
 { 
  
  SubscriberServiceApiClient 
 
  
 subscriber 
  
 = 
  
  SubscriberServiceApiClient 
 
 . 
  Create 
 
 (); 
  
  SubscriptionName 
 
  
 subscriptionName 
  
 = 
  
  SubscriptionName 
 
 . 
  FromProjectSubscription 
 
 ( 
 projectId 
 , 
  
 subscriptionId 
 ); 
  
  PushConfig 
 
  
 pushConfig 
  
 = 
  
 new 
  
  PushConfig 
 
  
 { 
  
 PushEndpoint 
  
 = 
  
 pushEndpoint 
  
 }; 
  
 subscriber 
 . 
  ModifyPushConfig 
 
 ( 
 subscriptionName 
 , 
  
 pushConfig 
 ); 
  
 } 
 }

    Go

    The following sample uses the major version of the Go Pub/Sub client library (v2). If you are still using the v1 library, see the migration guide to v2 . To see a list of v1 code samples, see the deprecated code samples .

    Before trying this sample, follow the Go setup instructions in Quickstart: Using Client Libraries . For more information, see the Pub/Sub Go API reference documentation .

      import 
  
 ( 
  
 "context" 
  
 "fmt" 
  
 "io" 
  
 "cloud.google.com/go/pubsub/v2" 
  
 "cloud.google.com/go/pubsub/v2/apiv1/pubsubpb" 
  
 "google.golang.org/protobuf/types/known/fieldmaskpb" 
 ) 
 func 
  
 updateEndpoint 
 ( 
 w 
  
 io 
 . 
 Writer 
 , 
  
 projectID 
 , 
  
 subscriptionName 
 , 
  
 endpoint 
  
 string 
 ) 
  
 error 
  
 { 
  
 // projectID := "my-project-id" 
  
 // subscriptionName := "projects/my-project/subscriptions/my-sub" 
  
 // endpoint := "https://my-test-project.appspot.com/push" 
  
 ctx 
  
 := 
  
 context 
 . 
 Background 
 () 
  
 client 
 , 
  
 err 
  
 := 
  
 pubsub 
 . 
 NewClient 
 ( 
 ctx 
 , 
  
 projectID 
 ) 
  
 if 
  
 err 
  
 != 
  
 nil 
  
 { 
  
 return 
  
 fmt 
 . 
 Errorf 
 ( 
 "pubsub.NewClient: %w" 
 , 
  
 err 
 ) 
  
 } 
  
 defer 
  
 client 
 . 
 Close 
 () 
  
 req 
  
 := 
  
& pubsubpb 
 . 
 UpdateSubscriptionRequest 
 { 
  
 Subscription 
 : 
  
& pubsubpb 
 . 
 Subscription 
 { 
  
 Name 
 : 
  
 subscriptionName 
 , 
  
 PushConfig 
 : 
  
& pubsubpb 
 . 
 PushConfig 
 { 
  
 PushEndpoint 
 : 
  
 endpoint 
 , 
  
 }, 
  
 }, 
  
 UpdateMask 
 : 
  
& fieldmaskpb 
 . 
 FieldMask 
 { 
  
 Paths 
 : 
  
 [] 
 string 
 { 
 "push_config" 
 }, 
  
 }, 
  
 } 
  
 subConfig 
 , 
  
 err 
  
 := 
  
 client 
 . 
 SubscriptionAdminClient 
 . 
 UpdateSubscription 
 ( 
 ctx 
 , 
  
 req 
 ) 
  
 if 
  
 err 
  
 != 
  
 nil 
  
 { 
  
 return 
  
 fmt 
 . 
 Errorf 
 ( 
 "Update: %w" 
 , 
  
 err 
 ) 
  
 } 
  
 fmt 
 . 
 Fprintf 
 ( 
 w 
 , 
  
 "Updated subscription config: %v\n" 
 , 
  
 subConfig 
 ) 
  
 return 
  
 nil 
 }

    Java

    Before trying this sample, follow the Java setup instructions in Quickstart: Using Client Libraries . For more information, see the Pub/Sub Java API reference documentation .

      import 
  
 com.google.cloud.pubsub.v1. SubscriptionAdminClient 
 
 ; 
 import 
  
 com.google.pubsub.v1. PushConfig 
 
 ; 
 import 
  
 com.google.pubsub.v1. Subscription 
 
 ; 
 import 
  
 com.google.pubsub.v1. SubscriptionName 
 
 ; 
 import 
  
 java.io.IOException 
 ; 
 public 
  
 class 
 UpdatePushConfigurationExample 
  
 { 
  
 public 
  
 static 
  
 void 
  
 main 
 ( 
 String 
 ... 
  
 args 
 ) 
  
 throws 
  
 Exception 
  
 { 
  
 // TODO(developer): Replace these variables before running the sample. 
  
 String 
  
 projectId 
  
 = 
  
 "your-project-id" 
 ; 
  
 String 
  
 subscriptionId 
  
 = 
  
 "your-subscription-id" 
 ; 
  
 String 
  
 pushEndpoint 
  
 = 
  
 "https://my-test-project.appspot.com/push" 
 ; 
  
 updatePushConfigurationExample 
 ( 
 projectId 
 , 
  
 subscriptionId 
 , 
  
 pushEndpoint 
 ); 
  
 } 
  
 public 
  
 static 
  
 void 
  
 updatePushConfigurationExample 
 ( 
  
 String 
  
 projectId 
 , 
  
 String 
  
 subscriptionId 
 , 
  
 String 
  
 pushEndpoint 
 ) 
  
 throws 
  
 IOException 
  
 { 
  
 try 
  
 ( 
  SubscriptionAdminClient 
 
  
 subscriptionAdminClient 
  
 = 
  
  SubscriptionAdminClient 
 
 . 
 create 
 ()) 
  
 { 
  
  SubscriptionName 
 
  
 subscriptionName 
  
 = 
  
  SubscriptionName 
 
 . 
 of 
 ( 
 projectId 
 , 
  
 subscriptionId 
 ); 
  
  PushConfig 
 
  
 pushConfig 
  
 = 
  
  PushConfig 
 
 . 
 newBuilder 
 (). 
  setPushEndpoint 
 
 ( 
 pushEndpoint 
 ). 
 build 
 (); 
  
 subscriptionAdminClient 
 . 
 modifyPushConfig 
 ( 
 subscriptionName 
 , 
  
 pushConfig 
 ); 
  
  Subscription 
 
  
 subscription 
  
 = 
  
 subscriptionAdminClient 
 . 
 getSubscription 
 ( 
 subscriptionName 
 ); 
  
 System 
 . 
 out 
 . 
 println 
 ( 
  
 "Updated push endpoint to: " 
  
 + 
  
 subscription 
 . 
  getPushConfig 
 
 (). 
 getPushEndpoint 
 ()); 
  
 } 
  
 } 
 }

    Node.js

    Before trying this sample, follow the Node.js setup instructions in Quickstart: Using Client Libraries . For more information, see the Pub/Sub Node.js API reference documentation .

      /** 
 * TODO(developer): Uncomment these variables before running the sample. 
 */ 
 // const topicNameOrId = 'YOUR_TOPIC_NAME_OR_ID'; 
 // const subscriptionNameOrId = 'YOUR_SUBSCRIPTION_NAME_OR_ID'; 
 // Imports the Google Cloud client library 
 const 
  
 { 
 PubSub 
 } 
  
 = 
  
 require 
 ( 
 '@ 
 google 
 - 
 cloud 
 / 
 pubsub 
 ' 
 ); 
 // Creates a client; cache this for further use 
 const 
  
 pubSubClient 
  
 = 
  
 new 
  
 PubSub 
 (); 
 async 
  
 function 
  
 modifyPushConfig 
 ( 
 topicNameOrId 
 , 
  
 subscriptionNameOrId 
 ) 
  
 { 
  
 const 
  
 options 
  
 = 
  
 { 
  
 // Set to an HTTPS endpoint of your choice. If necessary, register 
  
 // (authorize) the domain on which the server is hosted. 
  
 pushEndpoint 
 : 
  
 ` 
 https 
 : 
 //${pubSubClient.projectId}.appspot.com/push`, 
  
 }; 
  
 await 
  
 pubSubClient 
  
 . 
 topic 
 ( 
 topicNameOrId 
 ) 
  
 . 
 subscription 
 ( 
 subscriptionNameOrId 
 ) 
  
 . 
 modifyPushConfig 
 ( 
 options 
 ); 
  
 console 
 . 
 log 
 ( 
 ` 
 Modified 
  
 push 
  
 config 
  
 for 
  
 subscription 
  
 $ 
 { 
 subscriptionNameOrId 
 }. 
 ` 
 ); 
 }

    Node.ts

    Before trying this sample, follow the Node.js setup instructions in Quickstart: Using Client Libraries . For more information, see the Pub/Sub Node.js API reference documentation .

      /** 
 * 
 TODO 
 ( 
 developer 
 ): 
 Uncomment 
 these 
 variables 
 before 
 running 
 the 
 sample 
 . 
 */ 
 // 
 const 
 topicNameOrId 
 = 
 'YOUR_TOPIC_NAME_OR_ID' 
 ; 
 // 
 const 
 subscriptionNameOrId 
 = 
 'YOUR_SUBSCRIPTION_NAME_OR_ID' 
 ; 
 // 
 Imports 
 the 
 Google 
 Cloud 
 client 
 library 
 import 
  
 { 
 PubSub 
 , 
 CreateSubscriptionOptions 
 } 
 from 
  
 '@google-cloud/pubsub' 
 ; 
 // 
 Creates 
 a 
 client 
 ; 
 cache 
 this 
 for 
 further 
 use 
 const 
 pubSubClient 
 = 
 new 
 PubSub 
 (); 
 async 
 function 
 modifyPushConfig 
 ( 
 topicNameOrId 
 : 
 string 
 , 
 subscriptionNameOrId 
 : 
 string 
 , 
 ) 
 { 
 const 
 options 
 : 
 CreateSubscriptionOptions 
 = 
 { 
 // 
 Set 
 to 
 an 
 HTTPS 
 endpoint 
 of 
 your 
 choice 
 . 
 If 
 necessary 
 , 
 register 
 // 
 ( 
 authorize 
 ) 
 the 
 domain 
 on 
 which 
 the 
 server 
 is 
 hosted 
 . 
 pushEndpoint 
 : 
 ` 
 https 
 : 
 // 
 $ 
 { 
 pubSubClient 
 . 
 projectId 
 } 
 . 
 appspot 
 . 
 com 
 / 
 push 
 ` 
 , 
 }; 
 await 
 pubSubClient 
 . 
 topic 
 ( 
 topicNameOrId 
 ) 
 . 
 subscription 
 ( 
 subscriptionNameOrId 
 ) 
 . 
 modifyPushConfig 
 ( 
 options 
 ); 
 console 
 . 
 log 
 ( 
 ` 
 Modified 
 push 
 config 
 for 
 subscription 
 $ 
 { 
 subscriptionNameOrId 
 } 
 . 
 ` 
 ); 
 }

    Python

    Before trying this sample, follow the Python setup instructions in Quickstart: Using Client Libraries . For more information, see the Pub/Sub Python API reference documentation .

      from 
  
 google.cloud 
  
 import 
 pubsub_v1 
 # TODO(developer) 
 # project_id = "your-project-id" 
 # topic_id = "your-topic-id" 
 # subscription_id = "your-subscription-id" 
 # endpoint = "https://my-test-project.appspot.com/push" 
 subscriber 
 = 
 pubsub_v1 
 . 
  SubscriberClient 
 
 () 
 subscription_path 
 = 
 subscriber 
 . 
 subscription_path 
 ( 
 project_id 
 , 
 subscription_id 
 ) 
 push_config 
 = 
 pubsub_v1 
 . 
 types 
 . 
  PushConfig 
 
 ( 
 push_endpoint 
 = 
 endpoint 
 ) 
 subscription 
 = 
 pubsub_v1 
 . 
 types 
 . 
  Subscription 
 
 ( 
 name 
 = 
 subscription_path 
 , 
 topic 
 = 
 topic_id 
 , 
 push_config 
 = 
 push_config 
 ) 
 update_mask 
 = 
 { 
 "paths" 
 : 
 { 
 "push_config" 
 }} 
 # Wrap the subscriber in a 'with' block to automatically call close() to 
 # close the underlying gRPC channel when done. 
 with 
 subscriber 
 : 
 result 
 = 
 subscriber 
 . 
 update_subscription 
 ( 
 request 
 = 
 { 
 "subscription" 
 : 
 subscription 
 , 
 "update_mask" 
 : 
 update_mask 
 } 
 ) 
 print 
 ( 
 f 
 "Subscription updated: 
 { 
 subscription_path 
 } 
 " 
 ) 
 print 
 ( 
 f 
 "New endpoint for subscription is: 
 { 
 result 
 . 
 push_config 
 } 
 ." 
 )

    Ruby

    The following sample uses Ruby Pub/Sub client library v3. If you are still using the v2 library, see the migration guide to v3 . To see a list of Ruby v2 code samples, see the deprecated code samples .

    Before trying this sample, follow the Ruby setup instructions in Quickstart: Using Client Libraries . For more information, see the Pub/Sub Ruby API reference documentation .

      # subscription_id   = "your-subscription-id" 
 # new_endpoint      = "Endpoint where your app receives messages"" 
 pubsub 
  
 = 
  
 Google 
 :: 
 Cloud 
 :: 
  PubSub 
 
 . 
  new 
 
 subscription_admin 
  
 = 
  
 pubsub 
 . 
  subscription_admin 
 
 subscription 
  
 = 
  
 subscription_admin 
 . 
 get_subscription 
  
 \ 
  
 subscription 
 : 
  
 pubsub 
 . 
 subscription_path 
 ( 
 subscription_id 
 ) 
 subscription 
 . 
 push_config 
  
 = 
  
 Google 
 :: 
 Cloud 
 :: 
  PubSub 
 
 :: 
  V1 
 
 :: 
 PushConfig 
 . 
  new 
 
  
 \ 
  
 push_endpoint 
 : 
  
 new_endpoint 
 subscription_admin 
 . 
 update_subscription 
  
 subscription 
 : 
  
 subscription 
 , 
  
 update_mask 
 : 
  
 { 
  
 paths 
 : 
  
 [ 
 "push_config" 
 ] 
  
 } 
 puts 
  
 "Push endpoint updated."

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