A simple gRPC echo server. Returns metadatum in each response.
Build stubs and install dependencies:
git clone [email protected]:ivankliuk/grpc-echo.git
cd grpc-echo/
python -m grpc_tools.protoc -I proto/ --python_out=. --grpc_python_out=. proto/grpc_echo.proto
pip install -r requirements.txtRun client and server locally:
python server.py &
python client.pyBuild and publish Docker image:
docker build --platform=linux/amd64 -t grpc_echo .
docker images # get image hash
docker tag 8fac6a20b893 ivankliuk/grpc_echo:0.0.1
docker push ivankliuk/grpc_echo:0.0.1Clean up Kubernetes environment:
K8S_NS=my-namespace
kubectl delete namespace $K8S_NS
kubectl delete ingressclass nginxTo fix the error:
Error from server (InternalError): error when creating "kubernetes.yaml": Internal error occurred: failed calling webhook "validate.nginx.ingress.kubernetes.io": Post "https://ingress-nginx-1671457309-controller-admission.my-namespace.svc:443/networking/v1/ingresses?timeout=10s": no endpoints available for service "ingress-nginx-1671457309-controller-admission"
Delete validating webhook configurations:
kubectl get validatingwebhookconfigurations
kubectl delete validatingwebhookconfigurations ingress-nginx-1671457309-controller-admissionInstallation on a Kubernetes cluster:
K8S_NS=my-namespace
kubectl create namespace $K8S_NS
helm install ingress-nginx/ingress-nginx --generate-name -f helm_values.yaml -n $K8S_NS
kubectl apply -f kubernetes.yaml -n $K8S_NS- Header
Test-Headeris not present neither innginx.ingress.kubernetes.io/cors-allow-headersnor innginx.ingress.kubernetes.io/cors-expose-headers - Header
X-Grpc-Webis present only innginx.ingress.kubernetes.io/cors-allow-headers - Header
Grpc-Statusis present only innginx.ingress.kubernetes.io/cors-expose-headers
Get load balancer IP and run grpcurl:
LB=$(kubectl get svc -n $K8S_NS | grep LoadBalancer | awk '{print $3}')
grpcurl -authority my-example-host.com \
-H 'Test-Header: test-header' \
-H 'X-Grpc-Web: grpc-web' \
-H 'Grpc-Status: grpc-status' \
-d '{"payload": "payload!"}' \
-insecure \
--proto proto/grpc_echo.proto \
$LB:443 \
grpc_echo.Echo/PingServer log and client output:
{
"payload": "payload!",
"invocationMetadata": {
"user-agent": "grpcurl/1.8.7 grpc-go/1.48.0",
"x-request-id": "6de2e450dbc98ab8f3770ae94c1fc00f",
"x-real-ip": "10.7.13.26",
"x-forwarded-for": "10.7.13.26",
"x-forwarded-host": "my-example-host.com",
"x-forwarded-port": "443",
"x-forwarded-proto": "https",
"x-forwarded-scheme": "https",
"x-scheme": "https",
"test-header": "test-header",
"x-grpc-web": "grpc-web"
}
}
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