Hi Feng, Thank you for replying with options! Really appreciate!
Your reading this “as a functionality of istio to provide the templates to optimize your workload creation, and support gRPC-web on the edge of a proxyless gRPC mesh.” Is absolutely correct. I think such capability within Istio would be great. If you don’t mind I have some follow-up questions regarding these options: 1. On the option to configure a separate Envoy Proxy. Would I add it a separate container in that same pod? Are there any resources on how to inject a container? Perhaps it is a generic k8s capability. 2. I would love to improve the template! I looked into it, but I lack examples/documentation on how to it. Are there resources/examples I can look at how a template can be adjusted, extended, and deployed? 3. This is mine. I am considering to build my own xDS control plane in Java based on the Envoy control plane library. I have it working as a standalone server and now working to add k8s integration for endpoint identification. Perhaps it is too ambitious on my part and the above two options will do the job. Again, thank you for the info! Best regards, Oleg > On Oct 24, 2023, at 3:35 PM, 'Feng Li' via grpc.io <grpc-io@googlegroups.com> > wrote: > > Thanks for the question. > gRPC-web was natively supported in Envoy years ago, and as istio uses envoy > as its sidecar proxy, you get the functionality for free. > However, with the istio template you mentioned, that sidecar proxy is removed. > Here are some options in my mind: > - Continue to use the istio grpc-agent template for both of backend and > backend2 in your case. And configure a separate Enovy proxy to serve gRPC-web > traffic in front of backend > - Or improve the istio template to allow the sidecar proxy for backend. > > I read this as a functionality of istio to provide the templates to optimize > your workload creation, and support gRPC-web on the edge of a proxyless gRPC > mesh. > > On Tuesday, October 17, 2023 at 8:46:37 PM UTC-7 Oleg Cohen wrote: >> I was referring to this discussion: >> https://github.com/istio/istio/issues/40318 >> >> It does discuss the requirement I need. There are a couple points there: >> There is a mentioning if this capability envisioned and implemented but not >> documented >> There is also a grpc-mixed.yaml custom template that is shared. I wanted to >> try but not sure how such a file is deployed into istio. >> Thank you! >> Oleg >> >> On Monday, October 16, 2023 at 8:52:13 PM UTC-7 Oleg Cohen wrote: >>> Greetings! >>> >>> I have a use case as follows: >>> A React SPA Application (frontend) calls Service 1 using gRpc-Web >>> Service 1 (backend) calls Service 2 (backend2) via gRPC using proxyless xDS >>> I have been able to build three deployments: >>> frontend >>> backend >>> backend2 >>> backend uses a sidecar proxy and a grpc-web port to allow connection from >>> frontend. This works well. >>> >>> backend2 has a inject.istio.io/templates >>> <http://inject.istio.io/templates>: grpc-agent annotation and the Service2 >>> successfully initializes an XdsServer and finds GRPC_XDS_BOOTSTRAP >>> >>> The issue is how to initialize and use an xDS proxyless client within >>> Service 1 to call Service 2. I am not able to use the annotation grpc-agent >>> annotation on backend (Service 1) as it removes the sidecar and makes >>> gRpc-Web impossible. >>> >>> I am wondering if there is a way to make this happen? I did see solutions >>> about custom templates to have both annotations, but couldn't find an >>> example. Not sure whether it is the right way. >>> >>> Thank you! >>> Oleg > > > -- > You received this message because you are subscribed to the Google Groups > "grpc.io" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to grpc-io+unsubscr...@googlegroups.com > <mailto:grpc-io+unsubscr...@googlegroups.com>. > To view this discussion on the web visit > https://groups.google.com/d/msgid/grpc-io/5da87eb3-f8b4-4d36-9f79-5908e5b11188n%40googlegroups.com > > <https://groups.google.com/d/msgid/grpc-io/5da87eb3-f8b4-4d36-9f79-5908e5b11188n%40googlegroups.com?utm_medium=email&utm_source=footer>. -- You received this message because you are subscribed to the Google Groups "grpc.io" group. To unsubscribe from this group and stop receiving emails from it, send an email to grpc-io+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/grpc-io/F0053A00-2104-4BAD-80E2-39564D24F448%40gmail.com.
