// ClientSetup loads various TLS certificates and creates a
// gRPC TransportCredentials that presents the client certificate
// and validates the certificate presented by the server is for a
// specific hostname and issued by the provided issuer certificate
// thens dials and returns a grpc.ClientConn to the remote service.
func ClientSetup(c *cmd.GRPCClientConfig, stats metrics.Scope) (*grpc.ClientConn, error) {
if len(c.ServerAddresses) == 0 {
return nil, fmt.Errorf("boulder/grpc: ServerAddresses is empty")
}
if stats == nil {
return nil, errNilScope
}
serverIssuerBytes, err := ioutil.ReadFile(c.ServerIssuerPath)
if err != nil {
return nil, err
}
rootCAs := x509.NewCertPool()
if ok := rootCAs.AppendCertsFromPEM(serverIssuerBytes); !ok {
return nil, fmt.Errorf("Failed to parse server issues from '%s'", c.ServerIssuerPath)
}
clientCert, err := tls.LoadX509KeyPair(c.ClientCertificatePath, c.ClientKeyPath)
if err != nil {
return nil, err
}
grpc_prometheus.EnableHandlingTimeHistogram()
ci := clientInterceptor{stats.NewScope("gRPCClient"), clock.Default(), c.Timeout.Duration}
creds := bcreds.NewClientCredentials(rootCAs, []tls.Certificate{clientCert})
return grpc.Dial(
"", // Since our staticResolver provides addresses we don't need to pass an address here
grpc.WithTransportCredentials(creds),
grpc.WithBalancer(grpc.RoundRobin(newStaticResolver(c.ServerAddresses))),
grpc.WithUnaryInterceptor(ci.intercept),
)
}
// ClientSetup loads various TLS certificates and creates a
// gRPC TransportCredentials that presents the client certificate
// and validates the certificate presented by the server is for a
// specific hostname and issued by the provided issuer certificate
// thens dials and returns a grpc.ClientConn to the remote service.
func ClientSetup(c *cmd.GRPCClientConfig) (*grpc.ClientConn, error) {
if len(c.ServerAddresses) == 0 {
return nil, fmt.Errorf("boulder/grpc: ServerAddresses is empty")
}
serverIssuerBytes, err := ioutil.ReadFile(c.ServerIssuerPath)
if err != nil {
return nil, err
}
rootCAs := x509.NewCertPool()
if ok := rootCAs.AppendCertsFromPEM(serverIssuerBytes); !ok {
return nil, fmt.Errorf("Failed to parse server issues from '%s'", c.ServerIssuerPath)
}
clientCert, err := tls.LoadX509KeyPair(c.ClientCertificatePath, c.ClientKeyPath)
if err != nil {
return nil, err
}
return grpc.Dial(
"", // Since our staticResolver provides addresses we don't need to pass an address here
grpc.WithTransportCredentials(bcreds.New(rootCAs, []tls.Certificate{clientCert})),
grpc.WithBalancer(grpc.RoundRobin(newStaticResolver(c.ServerAddresses))),
)
}
func (w withGRPCConnectionPool) Apply(o *internal.DialSettings) {
balancer := grpc.RoundRobin(internal.NewPoolResolver(int(w), o))
o.GRPCDialOpts = append(o.GRPCDialOpts, grpc.WithBalancer(balancer))
}