Support for CosmosDB Change Feed Processors in go?

[lmorchard]

Feature Request

Azure Cosmos DB supports a Change Feed.

I've found support for Change Feed Processors in the C#, Node.js, and Java flavors of the Azure SDK. But, there doesn't seem to be support for it in this SDK for go.

We have a project that's currently using a Change Feed Processor implemented in C#. We'd like to move it to golang for consistency with other parts of the project.

Thank you!

[ealsur]

Yes, this should be a feature we will eventually have. Priority wise is not critical (like for example failover support), but nonetheless important

[anthonysomerset]

Hi All, this is a blocker for Teleport (https://goteleport.com/) to support Azure Native backends and allow for native hosting of Teleport with Azure environments, would be great if this could get some TLC - thanks

[ealsur]

@anthonysomerset can you clarify a bit what are the requirements? Is change feed processor or change feed queries (also known as change feed pull model) what is required?

CFP is going to be a long ways off, there are higher and more critical items to deliver first.

[anthonysomerset]

Hi @ealsur the teleport folks would have to elaborate, i am just an interested potential teleport customer/user that only uses Azure and would like azure native support for Teleport to be able to take next steps with their product - they just stated that to support CosmosDB they need Change Feed support in the Go SDK in order to bring the feature through - https://github.com/gravitational/teleport/issues/6117#issuecomment-1564381191

[ealsur]

Thanks. Change Feed is a service API and the Processor is just one way other SDKs have enabled their consumption but not the only one (https://learn.microsoft.com/en-us/azure/cosmos-db/change-feed#working-with-change-feed). The Processor is meant for a very specific scenario which is an automatic load balancing and distribution across multiple machines with book keeping in a secondary container. There are other ways, like https://learn.microsoft.com/en-us/azure/cosmos-db/nosql/change-feed-pull-model?tabs=dotnet. This issue is for tracking the Processor. If that is the one you want, then follow this issue. If you instead need the Pull Model please create a different issue for tracking. It all depends on your scenario.

[mjaow]

@ealsur looks it doesn't support golang even in pull mode, right? So what might be suggestion for those golang users? Would we have to use mongo db api since it supports changestream for golang?

[ealsur]

@mjaow At the moment Change Feed cannot be consumed from the NoSQL API Go SDK. It is available in other languages and through integrations, like Azure Functions.

[SuperMohit]

I see that there is no SDK for Go, but do we have a REST doc(swagger), that we can use, meanwhile?

[github-actions[bot]]

Hi @lmorchard, we deeply appreciate your input into this project. Regrettably, this issue has remained unresolved for over 2 years and inactive for 30 days, leading us to the decision to close it. We've implemented this policy to maintain the relevance of our issue queue and facilitate easier navigation for new contributors. If you still believe this topic requires attention, please feel free to create a new issue, referencing this one. Thank you for your understanding and ongoing support.