我想在多个节点上运行我自己的超级账本区块链。
我有以下设置：
我的 Ubuntu PC 正在托管一个订购者、对等方、沙发数据库、CA 服务器。
我的 Raspberry Pi（运行 Ubuntu Mate）正在托管：一个 peer 和 couch db。
这两个节点都在我的 docker swarm 组中。（我使用以下教程进行设置，并在RPi上运行 Fabric。）
我成功创建了一个频道。订购者和两个同行都能够加入它。peer chaincode然后我使用命令行界面中的工具安装并实例化了链代码。我还用一些值初始化了我的分类帐。
如果我在命令行界面 docker image 中执行以下命令：
peer chaincode query -o orderer.example.com:7050 -C mychannel -n v2x_sc -c '{"function":"queryAllVehicles","Args":[""]}'
无论我是在 RPi 还是 PC 节点上执行 cmd，它都会成功地从账本中返回所有数据。
我面临的问题如下：只要我想通过 Hyperledger-Fabric-SDK 运行相同的查询，它仍然会返回一些 grpc 错误。
Javascript SDK：
下面是我执行的 query.js（它来源于这段代码。
以下行：return channel.queryByChaincode(request);返回错误：来自查询的错误 = 错误：在截止日期之前无法连接
我搜索了这个错误的根源，发现它可能是 grpc 的暂时故障，因此他们将其关闭，直到有人再次遇到它1。
执行：
node query.js
Store path:/.../hfc-key-store
Successfully loaded user1 from persistence
error: [Remote.js]: Error: Failed to connect before the deadline
error: [client-utils.js]: sendPeersProposal - Promise is rejected: Error: Failed to connect before the deadline
at checkState (/.../node_modules/fabric-client/node_modules/grpc/src/client.js:838:16)
Query has completed, checking results
error from query = Error: Failed to connect before the deadline
at checkState (/.../node_modules/fabric-client/node_modules/grpc/src/client.js:838:16)
查询.js：
'use strict';
/*
* Copyright IBM Corp All Rights Reserved
*
* SPDX-License-Identifier: Apache-2.0
*/
/*
* Chaincode query
*/
var Fabric_Client = require('fabric-client');
var path = require('path');
var util = require('util');
var os = require('os');
//
var fabric_client = new Fabric_Client();
// setup the fabric network
var channel = fabric_client.newChannel('mychannel');
var peer = fabric_client.newPeer('grpc://192.168.1.13:7051');
channel.addPeer(peer);
//
var member_user = null;
var store_path = path.join(__dirname, 'hfc-key-store');
console.log('Store path:'+store_path);
var tx_id = null;
// create the key value store as defined in the fabric-client/config/default.json 'key-value-store' setting
Fabric_Client.newDefaultKeyValueStore({ path: store_path
}).then((state_store) => {
// assign the store to the fabric client
fabric_client.setStateStore(state_store);
var crypto_suite = Fabric_Client.newCryptoSuite();
// use the same location for the state store (where the users' certificate are kept)
// and the crypto store (where the users' keys are kept)
var crypto_store = Fabric_Client.newCryptoKeyStore({path: store_path});
crypto_suite.setCryptoKeyStore(crypto_store);
fabric_client.setCryptoSuite(crypto_suite);
// get the enrolled user from persistence, this user will sign all requests
return fabric_client.getUserContext('user1', true);
}).then((user_from_store) => {
if (user_from_store && user_from_store.isEnrolled()) {
console.log('Successfully loaded user1 from persistence');
member_user = user_from_store;
} else {
throw new Error('Failed to get user1.... run registerUser.js');
}
// queryCar chaincode function - requires 1 argument, ex: args: ['CAR4'],
// queryAllCars chaincode function - requires no arguments , ex: args: [''],
const request = {
//targets : --- letting this default to the peers assigned to the channel
chaincodeId: 'v2x_sc',
fcn: 'queryAllVehicles',
args: ['']
};
// send the query proposal to the peer
return channel.queryByChaincode(request);
}).then((query_responses) => {
console.log("Query has completed, checking results");
// query_responses could have more than one results if there multiple peers were used as targets
if (query_responses && query_responses.length == 1) {
if (query_responses[0] instanceof Error) {
console.error("error from query = ", query_responses[0]);
} else {
console.log("Response is ", query_responses[0].toString());
}
} else {
console.log("No payloads were returned from query");
}
}).catch((err) => {
console.error('Failed to query successfully :: ' + err);
});
由于我真的很绝望，所以我在 Java SDK 中尝试了同样的方法。此代码源自本教程。
运行它时，我遇到了类似的错误。此行：channel.initialize();导致以下错误：
错误频道 - 向 peer0.org1.example.com 发送提案失败，因为：gRPC 失败=状态{code=UNKNOWN，描述=访问被拒绝：频道 [mychannel] 创建者组织 [Org1MSP]，原因 = null}
异常跟踪如下：
ERROR Channel - Sending proposal to peer0.org1.example.com failed because of: gRPC failure=Status{code=UNKNOWN, description=access denied: channel [mychannel] creator org [Org1MSP], cause=null}
java.lang.Exception: io.grpc.StatusRuntimeException: UNKNOWN: access denied: channel [mychannel] creator org [Org1MSP]
at org.hyperledger.fabric.sdk.Channel.sendProposalToPeers(Channel.java:3619)
at org.hyperledger.fabric.sdk.Channel.getConfigBlock(Channel.java:834)
at org.hyperledger.fabric.sdk.Channel.parseConfigBlock(Channel.java:1759)
at org.hyperledger.fabric.sdk.Channel.loadCACertificates(Channel.java:1596)
at org.hyperledger.fabric.sdk.Channel.initialize(Channel.java:1083)
at Main.getChannel(Main.java:119)
at Main.main(Main.java:65)
主.java：
import org.apache.log4j.Logger;
import org.hyperledger.fabric.sdk.*;
import org.hyperledger.fabric.sdk.exception.CryptoException;
import org.hyperledger.fabric.sdk.exception.InvalidArgumentException;
import org.hyperledger.fabric.sdk.exception.ProposalException;
import org.hyperledger.fabric.sdk.exception.TransactionException;
import org.hyperledger.fabric.sdk.security.CryptoSuite;
import org.hyperledger.fabric_ca.sdk.HFCAClient;
import org.hyperledger.fabric_ca.sdk.RegistrationRequest;
import java.io.IOException;
import java.io.ObjectInputStream;
import java.io.ObjectOutputStream;
import java.nio.file.Files;
import java.nio.file.Paths;
import java.security.PrivateKey;
import java.util.Collection;
import java.util.Properties;
/**
* <h1>HFJavaSDKBasicExample</h1>
* <p>
* Simple example showcasing basic fabric-ca and fabric actions.
* The demo required fabcar fabric up and running.
* <p>
* The demo shows
* <ul>
* <li>connecting to fabric-ca</li>
* <li>enrolling admin to get new key-pair, certificate</li>
* <li>registering and enrolling a new user using admin</li>
* <li>creating HF client and initializing channel</li>
* <li>invoking chaincode query</li>
* </ul>
*
*/
public class Main {
private static final Logger log = Logger.getLogger(Main.class);
public static final String CERT_FOLDER_PATH = "/home/filip/masterthesis/prototype/features_analyser/hyperledger-fabric/Build-Multi-Host-Network-Hyperledger/v2x_java/hfc-key-store";
public static void main(String[] args) throws Exception {
// create fabric-ca client
HFCAClient caClient = getHfCaClient("http://localhost:7054", null);
// enroll or load admin
AppUser admin = getAdmin(caClient);
log.info(admin);
// register and enroll new user
AppUser appUser = getUser(caClient, admin, "hfuser");
log.info(appUser);
// get HFC client instance
HFClient client = getHfClient();
// set user context
client.setUserContext(admin);
// get HFC channel using the client
Channel channel = getChannel(client);
log.info("Channel: " + channel.getName());
// call query blockchain example
queryBlockChain(client);
}
/**
* Invoke blockchain query
*
* @param client The HF Client
* @throws ProposalException
* @throws InvalidArgumentException
*/
static void queryBlockChain(HFClient client) throws ProposalException, InvalidArgumentException {
// get channel instance from client
Channel channel = client.getChannel("mychannel");
// create chaincode request
QueryByChaincodeRequest qpr = client.newQueryProposalRequest();
// build cc id providing the chaincode name. Version is omitted here.
ChaincodeID fabcarCCId = ChaincodeID.newBuilder().setName("v2x_sc").build();
qpr.setChaincodeID(fabcarCCId);
// CC function to be called
qpr.setFcn("queryAllVehicles");
Collection<ProposalResponse> res = channel.queryByChaincode(qpr);
// display response
for (ProposalResponse pres : res) {
String stringResponse = new String(pres.getChaincodeActionResponsePayload());
log.info(stringResponse);
}
}
/**
* Initialize and get HF channel
*
* @param client The HFC client
* @return Initialized channel
* @throws InvalidArgumentException
* @throws TransactionException
*/
static Channel getChannel(HFClient client) throws InvalidArgumentException, TransactionException {
// initialize channel
// peer name and endpoint in fabcar network
Peer peer = client.newPeer("peer0.org1.example.com", "grpc://192.168.1.24:8051");
// eventhub name and endpoint in fabcar network
EventHub eventHub = client.newEventHub("eventhub01", "grpc://localhost:7053");
// orderer name and endpoint in fabcar network
Orderer orderer = client.newOrderer("orderer.example.com", "grpc://localhost:7050");
// channel name in fabcar network
Channel channel = client.newChannel("mychannel");
channel.addPeer(peer);
channel.addEventHub(eventHub);
channel.addOrderer(orderer);
channel.initialize();
return channel;
}
/**
* Create new HLF client
*
* @return new HLF client instance. Never null.
* @throws CryptoException
* @throws InvalidArgumentException
*/
static HFClient getHfClient() throws Exception {
// initialize default cryptosuite
CryptoSuite cryptoSuite = CryptoSuite.Factory.getCryptoSuite();
// setup the client
HFClient client = HFClient.createNewInstance();
client.setCryptoSuite(cryptoSuite);
return client;
}
/**
* Register and enroll user with userId.
* If AppUser object with the name already exist on fs it will be loaded and
* registration and enrollment will be skipped.
*
* @param caClient The fabric-ca client.
* @param registrar The registrar to be used.
* @param userId The user id.
* @return AppUser instance with userId, affiliation,mspId and enrollment set.
* @throws Exception
*/
static AppUser getUser(HFCAClient caClient, AppUser registrar, String userId) throws Exception {
AppUser appUser = tryDeserialize(userId);
if (appUser == null) {
RegistrationRequest rr = new RegistrationRequest(userId, "org1");
String enrollmentSecret = caClient.register(rr, registrar);
Enrollment enrollment = caClient.enroll(userId, enrollmentSecret);
appUser = new AppUser(userId, "org1", "Org1MSP", enrollment);
serialize(appUser);
}
return appUser;
}
/**
* Enroll admin into fabric-ca using {@code admin/adminpw} credentials.
* If AppUser object already exist serialized on fs it will be loaded and
* new enrollment will not be executed.
*
* @param caClient The fabric-ca client
* @return AppUser instance with userid, affiliation, mspId and enrollment set
* @throws Exception
*/
static AppUser getAdmin(HFCAClient caClient) throws Exception {
AppUser admin = tryDeserialize("admin");
if (admin == null) {
Enrollment adminEnrollment = caClient.enroll("admin", "adminpw");
admin = new AppUser("admin", "org1", "Org1MSP", adminEnrollment);
serialize(admin);
}
return admin;
}
/**
* Get new fabic-ca client
*
* @param caUrl The fabric-ca-server endpoint url
* @param caClientProperties The fabri-ca client properties. Can be null.
* @return new client instance. never null.
* @throws Exception
*/
static HFCAClient getHfCaClient(String caUrl, Properties caClientProperties) throws Exception {
CryptoSuite cryptoSuite = CryptoSuite.Factory.getCryptoSuite();
HFCAClient caClient = HFCAClient.createNewInstance(caUrl, caClientProperties);
caClient.setCryptoSuite(cryptoSuite);
return caClient;
}
// user serialization and deserialization utility functions
// files are stored in the base directory
/**
* Serialize AppUser object to file
*
* @param appUser The object to be serialized
* @throws IOException
*/
static void serialize(AppUser appUser) throws IOException {
try (ObjectOutputStream oos = new ObjectOutputStream(Files.newOutputStream(
Paths.get(appUser.getName() + ".jso")))) {
oos.writeObject(appUser);
}
}
/**
* Deserialize AppUser object from file
*
* @param name The name of the user. Used to build file name ${name}.jso
* @return
* @throws Exception
*/
static AppUser tryDeserialize(String name) throws Exception {
if (Files.exists(Paths.get(name + ".jso"))) {
return deserialize(name);
}
return null;
}
static AppUser deserialize(String name) throws Exception {
try (ObjectInputStream decoder = new ObjectInputStream(
Files.newInputStream(Paths.get(name + ".jso")))) {
return (AppUser) decoder.readObject();
}
}
}
有人可以帮我解决这个问题吗？一个有趣的提示是，如果我在我的 PC 上本地执行 Hyperledger 网络。两种代码（JS 和 Java）都可以正常工作。