hyperledger/fabric · error

no non-loopback, IPv4 interface detected

Error message

no non-loopback, IPv4 interface detected

What it means

getLocalIP enumerated the host's network interface addresses and found none that is a non-loopback IPv4 address — typically a container/VM with only IPv6 or loopback interfaces, so no advertised IP can be auto-detected.

Source

Thrown at core/peer/config.go:384

	peerLogger.Info("Returning", peerAddress)
	return peerAddress, nil
}

// getLocalIP returns the a loopback local IP of the host.
func getLocalIP() (string, error) {
	addrs, err := net.InterfaceAddrs()
	if err != nil {
		return "", err
	}
	for _, address := range addrs {
		// check the address type and if it is not a loopback then display it
		if ipnet, ok := address.(*net.IPNet); ok && !ipnet.IP.IsLoopback() {
			if ipnet.IP.To4() != nil {
				return ipnet.IP.String(), nil
			}
		}
	}
	return "", errors.Errorf("no non-loopback, IPv4 interface detected")
}

// GetServerConfig returns the gRPC server configuration for the peer
func GetServerConfig() (comm.ServerConfig, error) {
	serverConfig := comm.ServerConfig{
		ConnectionTimeout: viper.GetDuration("peer.connectiontimeout"),
		SecOpts: comm.SecureOptions{
			UseTLS: viper.GetBool("peer.tls.enabled"),
		},
	}
	if serverConfig.SecOpts.UseTLS {
		// get the certs from the file system
		serverKey, err := os.ReadFile(config.GetPath("peer.tls.key.file"))
		if err != nil {
			return serverConfig, fmt.Errorf("error loading TLS key (%s)", err)
		}
		serverCert, err := os.ReadFile(config.GetPath("peer.tls.cert.file"))
		if err != nil {

View on GitHub (pinned to 2736b63f8f)

Solutions

1. Configure an explicit peer.address instead of relying on auto-detect
2. Attach an IPv4 network interface to the host/container

When it happens

Trigger: Thrown at core/peer/config.go:384 when the library encounters an invalid state.

Common situations: See trigger scenarios.

AI-assisted analysis of hyperledger/fabric@2736b63f8f (2026-09-04). Data as JSON: /api/errors/93e8d507536e21f0. Report an issue: GitHub.