I am looking to implement PubSub in an existing project that is already using the Microsoft.Azure.Functions.ExtensionBundle, which currently does not contain PubSub. What is the easiest way to get PubSub implemented my serverless implementation in this case, do I need to remove Microsoft.Azure.Functions.ExtensionBundle from host.json and manually install everything I currently use with func extensions install ?

Hi @Aaron Manill , Welcome to Microsoft Q&A! Thanks for posting the question. I see that you are trying to use PubSub in an existing project, however the extension bundle version, being used in this project, does not contain PubSub. Please note that - you can't explicitly install extensions in a function app that is using extension bundles. You will have to remove the extensionBundle section in host.json before explicitly installing extensions. Please refer to the Important section of this link: Explicitly install extensions . -- updated 03/08/2022 -- The table documented here points to 3.4.0 version of extension.json which has pubsub binding included in the extension bundle. However, this version has not been released yet . I am reaching out to the Internal team for more clarification and update as required. Please let me know if you have any questions. --- Please 'Accept as answer' and ‘Upvote’ if it helped so that it can help others in the community looking for help on similar topics.

How to install PubSub along with Microsoft.Azure.Functions.ExtensionBundle

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AnuragSingh-MSFT 19,846 Reputation points

2022-03-02T10:42:32.87+00:00

Hi @Aaron Manill ,

Welcome to Microsoft Q&A! Thanks for posting the question.

I see that you are trying to use PubSub in an existing project, however the extension bundle version, being used in this project, does not contain PubSub. Please note that - you can't explicitly install extensions in a function app that is using extension bundles. You will have to remove the extensionBundle section in host.json before explicitly installing extensions. Please refer to the Important section of this link: Explicitly install extensions.

--updated 03/08/2022--
The table documented here points to 3.4.0 version of extension.json which has pubsub binding included in the extension bundle. However, this version has not been released yet. I am reaching out to the Internal team for more clarification and update as required.

Please let me know if you have any questions.

---
Please 'Accept as answer' and ‘Upvote’ if it helped so that it can help others in the community looking for help on similar topics.
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Aaron Manill 86 Reputation points

2022-03-02T16:16:30.227+00:00

hi @AnuragSingh-MSFT I did not think PubSub was in the bundle yet, it had looked like release notes for 3.5 had it as coming in, but 3.5 was abandoned according to the github issues section, Was PubSub already in a version of 3.X before that?

AnuragSingh-MSFT 19,846 Reputation points

2022-03-03T05:16:01.497+00:00

@Aaron Manill , thank you for the reply. Based on the commit history, the pubsub was added to version 3.4.0 of the bundle around December last year. Please refer to this Github commit and the corresponding extension.json file for details.

---
Please 'Accept as answer' if it helped so that it can help others in the community looking for help on similar topics.

Aaron Manill 86 Reputation points

2022-03-03T22:22:35.017+00:00

We are getting an error when we try updating from "version": "[2.*, 3.0.0)" to "[3.3.0, 4.0.0)" any advice on how to resolve this?

AnuragSingh-MSFT 19,846 Reputation points

2022-03-07T08:00:47.97+00:00

@Aaron Manill , One of the reasons where such failure may occur is because of un-updated version of Azure Functions core tools. Can you please upgrade Azure Functions Core tools and see if it works. You may also refer to this link for a similar discussion on stackoverflow. In case this does not resolve this issue, please feel free to open a new Q&A thread so that we may keep the discussion scoped to a single issue.

Please 'Accept as answer' if it helped so that it can help others in the community looking for help on similar topics.

Aaron Manill 86 Reputation points

2022-03-07T17:28:24.377+00:00

I am now getting the following
[2022-03-07T17:20:25.650Z] The 'subpub-negotiate' function is in error: The binding type(s) 'webPubSubConnection' were not found in the configured extension bundle. Please ensure the type is correct and the correct version of extension bundle is configured.
[2022-03-07T17:20:25.651Z] The 'subpub-trigger-message' function is in error: The binding type(s) 'webPubSubTrigger, webPubSub' were not found in the configured extension bundle. Please ensure the type is correct and the correct version of extension bundle is configured.

Host looks like this, so it almost feels like host.json version is being ignored somehow.

{ "version": "2.0", "logging": { "applicationInsights": { "samplingSettings": { "isEnabled": true, "excludedTypes": "Request" } } }, "extensionBundle": { "id": "Microsoft.Azure.Functions.ExtensionBundle", "version": "[3.3.0, 4.0.0)" } }

3.3.0 release notes seem to indicate PubSub is not included, https://github.com/Azure/azure-functions-extension-bundles/releases/tag/3.3.0 The Git history looks like it should have been pushed in 3.4.0 which has not been released as of yet, https://github.com/Azure/azure-functions-extension-bundles/commits/v3.x/src/Microsoft.Azure.Functions.ExtensionBundle

AnuragSingh-MSFT 19,846 Reputation points

2022-03-08T07:15:21.987+00:00

@Aaron Manill , thank you for the reply. You are correct, version 3.4 (containing pubsub binding is not in the release list and the latest 3.X version released is 3.3.0). However, the table documented here points to v3.4.0 extension.json causing this misunderstanding. I am reaching out to our team internally and will get this corrected. I apologize for the inconvenience and misunderstanding that it has caused.

Based on the new findings, you will have to use the explicit extension install instead of extension bundle for v3.X (till v3.4.+ becomes available)

I will update this thread with any information that I receive. I am also updating the answer above to reflect this updated information for others looking for help on this topic.

AnuragSingh-MSFT 19,846 Reputation points

2022-03-09T04:02:26.893+00:00

@Aaron Manill , the document has been corrected and it now points to the correct extension.json file from v3.3.0. Thank you for your time on this issue.
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How to install PubSub along with Microsoft.Azure.Functions.ExtensionBundle

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