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config.go
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/
config.go
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/*
Copyright IBM Corp. All Rights Reserved.
SPDX-License-Identifier: Apache-2.0
*/
// The 'viper' package for configuration handling is very flexible, but has
// been found to have extremely poor performance when configuration values are
// accessed repeatedly. The function CacheConfiguration() defined here caches
// all configuration values that are accessed frequently. These parameters
// are now presented as function calls that access local configuration
// variables. This seems to be the most robust way to represent these
// parameters in the face of the numerous ways that configuration files are
// loaded and used (e.g, normal usage vs. test cases).
// The CacheConfiguration() function is allowed to be called globally to
// ensure that the correct values are always cached; See for example how
// certain parameters are forced in 'ChaincodeDevMode' in main.go.
package peer
import (
"fmt"
"io/ioutil"
"net"
"path/filepath"
"github.com/spf13/viper"
"github.com/hyperledger/fabric/core/comm"
"github.com/hyperledger/fabric/core/config"
pb "github.com/hyperledger/fabric/protos/peer"
)
// Is the configuration cached?
var configurationCached = false
// Cached values and error values of the computed constants getLocalAddress(),
// getValidatorStreamAddress(), and getPeerEndpoint()
var localAddress string
var localAddressError error
var peerEndpoint *pb.PeerEndpoint
var peerEndpointError error
// Cached values of commonly used configuration constants.
// CacheConfiguration computes and caches commonly-used constants and
// computed constants as package variables. Routines which were previously
// global have been embedded here to preserve the original abstraction.
func CacheConfiguration() (err error) {
// getLocalAddress returns the address:port the local peer is operating on. Affected by env:peer.addressAutoDetect
getLocalAddress := func() (peerAddress string, err error) {
if viper.GetBool("peer.addressAutoDetect") {
// Need to get the port from the peer.address setting, and append to the determined host IP
_, port, err := net.SplitHostPort(viper.GetString("peer.address"))
if err != nil {
err = fmt.Errorf("Error auto detecting Peer's address: %s", err)
return "", err
}
peerAddress = net.JoinHostPort(GetLocalIP(), port)
peerLogger.Infof("Auto detected peer address: %s", peerAddress)
} else {
peerAddress = viper.GetString("peer.address")
}
return
}
// getPeerEndpoint returns the PeerEndpoint for this Peer instance. Affected by env:peer.addressAutoDetect
getPeerEndpoint := func() (*pb.PeerEndpoint, error) {
var peerAddress string
peerAddress, err := getLocalAddress()
if err != nil {
return nil, err
}
return &pb.PeerEndpoint{Id: &pb.PeerID{Name: viper.GetString("peer.id")}, Address: peerAddress}, nil
}
localAddress, localAddressError = getLocalAddress()
peerEndpoint, _ = getPeerEndpoint()
configurationCached = true
if localAddressError != nil {
return localAddressError
}
return
}
// cacheConfiguration logs an error if error checks have failed.
func cacheConfiguration() {
if err := CacheConfiguration(); err != nil {
peerLogger.Errorf("Execution continues after CacheConfiguration() failure : %s", err)
}
}
//Functional forms
// GetLocalAddress returns the peer.address property
func GetLocalAddress() (string, error) {
if !configurationCached {
cacheConfiguration()
}
return localAddress, localAddressError
}
// GetPeerEndpoint returns peerEndpoint from cached configuration
func GetPeerEndpoint() (*pb.PeerEndpoint, error) {
if !configurationCached {
cacheConfiguration()
}
return peerEndpoint, peerEndpointError
}
// GetSecureConfig returns the secure server configuration for the peer
func GetSecureConfig() (comm.SecureServerConfig, error) {
secureConfig := comm.SecureServerConfig{
UseTLS: viper.GetBool("peer.tls.enabled"),
}
if secureConfig.UseTLS {
// get the certs from the file system
serverKey, err := ioutil.ReadFile(config.GetPath("peer.tls.key.file"))
if err != nil {
return secureConfig, fmt.Errorf("error loading TLS key (%s)", err)
}
serverCert, err := ioutil.ReadFile(config.GetPath("peer.tls.cert.file"))
if err != nil {
return secureConfig, fmt.Errorf("error loading TLS certificate (%s)", err)
}
secureConfig.ServerCertificate = serverCert
secureConfig.ServerKey = serverKey
secureConfig.RequireClientCert = viper.GetBool("peer.tls.clientAuthRequired")
if secureConfig.RequireClientCert {
var clientRoots [][]byte
for _, file := range viper.GetStringSlice("peer.tls.clientRootCAs.files") {
clientRoot, err := ioutil.ReadFile(
config.TranslatePath(filepath.Dir(viper.ConfigFileUsed()), file))
if err != nil {
return secureConfig,
fmt.Errorf("error loading client root CAs (%s)", err)
}
clientRoots = append(clientRoots, clientRoot)
}
secureConfig.ClientRootCAs = clientRoots
}
// check for root cert
if config.GetPath("peer.tls.rootcert.file") != "" {
rootCert, err := ioutil.ReadFile(config.GetPath("peer.tls.rootcert.file"))
if err != nil {
return secureConfig, fmt.Errorf("error loading TLS root certificate (%s)", err)
}
secureConfig.ServerRootCAs = [][]byte{rootCert}
}
return secureConfig, nil
}
return secureConfig, nil
}