Traefik GrpcWeb Documentation - Traefik

The grpcWeb middleware converts gRPC Web requests to HTTP/2 gRPC requests before forwarding them to the backends.

!!! tip

Please note, that Traefik needs to communicate using gRPC with the backends (h2c or HTTP/2 over TLS).
Check out [Exposing gRPC Services](../../../../expose/overview.md#exposing-grpc-services) for more details.

Configuration Examples

yaml

http:
  middlewares:
    test-grpcweb:
      grpcWeb:
        allowOrigins:
          - "*"

toml

[http.middlewares]
  [http.middlewares.test-grpcweb.grpcWeb]
    allowOrigins = ["*"]

yaml

labels:
  - "traefik.http.middlewares.test-grpcweb.grpcweb.allowOrigins=*"

json

{
  //...
  "Tags" : [
    "traefik.http.middlewares.test-grpcweb.grpcWeb.allowOrigins=*"
  ]
}

yaml

apiVersion: traefik.io/v1alpha1
kind: Middleware
metadata:
  name: test-grpcweb
spec:
  grpcWeb:
    allowOrigins:
      - "*"

Configuration Options

Field	Description	Default
<a id="opt-allowOrigins" href="#opt-allowOrigins" title="#opt-allowOrigins">`allowOrigins`</a>	List of allowed origins.
A wildcard origin `*` can also be configured to match all requests.
More information here.	[]	No

allowOrigins

More information including how to use the settings can be found at: