Open a gRPC connection to a service
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Function to create a new gRPC connection.
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For detailed documentation that includes this code sample, see the following:
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[[["Easy to understand","easyToUnderstand","thumb-up"],["Solved my problem","solvedMyProblem","thumb-up"],["Other","otherUp","thumb-up"]],[["Hard to understand","hardToUnderstand","thumb-down"],["Incorrect information or sample code","incorrectInformationOrSampleCode","thumb-down"],["Missing the information/samples I need","missingTheInformationSamplesINeed","thumb-down"],["Other","otherDown","thumb-down"]],[],[],[],null,["# Open a gRPC connection to a service\n\nFunction to create a new gRPC connection.\n\nExplore further\n---------------\n\n\nFor detailed documentation that includes this code sample, see the following:\n\n- [Invoking with gRPC](/anthos/run/archive/docs/triggering/grpc)\n- [Invoking with gRPC](/kubernetes-engine/enterprise/knative-serving/docs/triggering/grpc)\n- [Using gRPC](/run/docs/triggering/grpc)\n\nCode sample\n-----------\n\n### Go\n\n\nTo authenticate to Cloud Run, set up Application Default Credentials.\nFor more information, see\n\n[Set up authentication for a local development environment](/docs/authentication/set-up-adc-local-dev-environment).\n\n\n import (\n \t\"crypto/tls\"\n \t\"crypto/x509\"\n\n \t\"google.golang.org/grpc\"\n \t\"google.golang.org/grpc/credentials\"\n )\n\n // NewConn creates a new gRPC connection.\n // host should be of the form domain:port, e.g., example.com:443\n func NewConn(host string, insecure bool) (*grpc.ClientConn, error) {\n \tvar opts []grpc.DialOption\n \tif host != \"\" {\n \t\topts = append(opts, grpc.WithAuthority(host))\n \t}\n\n \tif insecure {\n \t\topts = append(opts, grpc.WithInsecure())\n \t} else {\n \t\t// Note: On the Windows platform, use of x509.SystemCertPool() requires\n \t\t// Go version 1.18 or higher.\n \t\tsystemRoots, err := x509.SystemCertPool()\n \t\tif err != nil {\n \t\t\treturn nil, err\n \t\t}\n \t\tcred := credentials.NewTLS(&tls.Config{\n \t\t\tRootCAs: systemRoots,\n \t\t})\n \t\topts = append(opts, grpc.WithTransportCredentials(cred))\n \t}\n\n \treturn grpc.Dial(host, opts...)\n }\n\nWhat's next\n-----------\n\n\nTo search and filter code samples for other Google Cloud products, see the\n[Google Cloud sample browser](/docs/samples?product=cloudrun)."]]