posts/grpc-web-istio/

[utterances-bot]

GRPC & GRPC-Web multiplexed in Istio · jackieli.dev

Expose GRPC & GRPC-Web via One Port in Istio

https://jackieli.dev/posts/grpc-web-istio/

[bradenwright-opunai]

If you use grpc-web and istio 1.1 you should not need to create the EnvoyFilter, see istio/istio#10064 for more details. I came across that update when looking over this venilnoronha/grpc-web-istio-demo#3 example. I'm trying to setup on knative though, so glad you had an example of the EnvoyFilter b/c I'll need to create it myself still

[jackielii]

Yes, you're right. Although the example you linked uses the sidecar. I.e. if you enable the side car for the deployment / namespace, then it'll automatically enable the grpc-web filter on the side car envoy. This was how we've done it before. It obviously will allow grpc-web to be proxied on the gateway using the same port as https/http, but doesn't allow grpc to pass through.

So my method not only eliminates the need to the side car, but also enables grpc to be multiplexed via the https port.

[muralaris]

Jackielii -
@jackie li - i tried with your example.
I see that the docker image for this is missing. Where can I get docker image for it or how do I build the same.

[jackielii]

Hi @muralaris the image is built by the ko tool. It builds the go code, builds the image and deploys them in one step.

The magic happens with command export KO_DOCKER_REPO=tespkg ko apply -f config/. Here you want to change the KO_DOCKER_REPO to your docker hub id, then everything else should just work.

Hope this helps.

[jackielii]

The instructions are at https://github.com/jackieli-tes/learn-grpc-web-istio#usage