gRPC Sample : Go
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The following is a sample of a gRPC client calling another container running gRPC server to execute a SayHello call. The solution runs on Azure Container Apps.
Deploy the sample
Azure CLI
RESOURCE_GROUP="grpc-sample"
LOCATION="canadacentral"
LOG_ANALYTICS_WORKSPACE="aca-logs"
ACA_ENVIRONMENT="aca-env"
az extension add -y \
--source https://workerappscliextension.blob.core.windows.net/azure-cli-extension/containerapp-0.2.0-py2.py3-none-any.whl
az provider register --namespace Microsoft.Web
az group create \
--name $RESOURCE_GROUP \
--location "$LOCATION"
az monitor log-analytics workspace create \
--resource-group $RESOURCE_GROUP \
--workspace-name $LOG_ANALYTICS_WORKSPACE
LOG_ANALYTICS_WORKSPACE_CLIENT_ID=`az monitor log-analytics workspace show --query customerId -g $RESOURCE_GROUP -n $LOG_ANALYTICS_WORKSPACE --out tsv`
LOG_ANALYTICS_WORKSPACE_CLIENT_SECRET=`az monitor log-analytics workspace get-shared-keys --query primarySharedKey -g $RESOURCE_GROUP -n $LOG_ANALYTICS_WORKSPACE --out tsv`
# Create the Container Apps Environment
az containerapp env create \
--name $ACA_ENVIRONMENT \
--resource-group $RESOURCE_GROUP \
--logs-workspace-id $LOG_ANALYTICS_WORKSPACE_CLIENT_ID \
--logs-workspace-key $LOG_ANALYTICS_WORKSPACE_CLIENT_SECRET \
--location "$LOCATION"
# Create the gRPC backend internal service
az containerapp create \
--name grpc-backend \
--resource-group $RESOURCE_GROUP \
--environment $ACA_ENVIRONMENT \
--image ghcr.io/jeffhollan/grpc-sample-go/grpc-backend:main \
--ingress 'internal' \
--target-port 50051 \
--transport 'http2'
GRPC_SERVER_ADDRESS=$(az containerapp show \
--resource-group $RESOURCE_GROUP \
--name grpc-backend \
--query configuration.ingress.fqdn -otsv)
# Create the HTTPS frontend gRPC client container
az containerapp create \
--name https-frontend \
--resource-group $RESOURCE_GROUP \
--environment $ACA_ENVIRONMENT \
--image ghcr.io/jeffhollan/grpc-sample-go/https-frontend:main \
--environment-variables GRPC_SERVER_ADDRESS=$GRPC_SERVER_ADDRESS':443' \
--target-port 8050 \
--ingress 'external' \
--query configuration.ingress.fqdn
Try the solution
After deploying, get the FQDN of the https-frontend and call it and hit the /hello endpoint. It will call the gRPC backend (via gRPC) and return a message to the client.
Build and run the code
Generate the protobuf client
protoc protos/greet.proto -I. --go_out=. --go_opt=paths=source_relative --go-grpc_out=. --go-grpc_opt=paths=source_relative
