type Instance string

const (
    // GRPC declares that the port carries gRPC traffic.
    GRPC Instance = "GRPC"
    // GRPCWeb declares that the port carries gRPC traffic.
    GRPCWeb Instance = "GRPC-Web"
    // HTTP declares that the port carries HTTP/1.1 traffic.
    // Note that HTTP/1.0 or earlier may not be supported by the proxy.
    HTTP Instance = "HTTP"
    // HTTP2 declares that the port carries HTTP/2 traffic.
    HTTP2 Instance = "HTTP2"
    // HTTPS declares that the port carries HTTPS traffic.
    HTTPS Instance = "HTTPS"
    // TCP declares the the port uses TCP.
    // This is the default protocol for a service port.
    TCP Instance = "TCP"
    // TLS declares that the port carries TLS traffic.
    // TLS traffic is assumed to contain SNI as part of the handshake.
    TLS Instance = "TLS"
    // UDP declares that the port uses UDP.
    // Note that UDP protocol is not currently supported by the proxy.
    UDP Instance = "UDP"
    // Mongo declares that the port carries MongoDB traffic.
    Mongo Instance = "Mongo"
    // Redis declares that the port carries Redis traffic.
    Redis Instance = "Redis"
    // MySQL declares that the port carries MySQL traffic.
    MySQL Instance = "MySQL"
    // Unsupported - value to signify that the protocol is unsupported.
    Unsupported Instance = "UnsupportedProtocol"
)