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本文介绍: Fabric-SDK-GO的当前版本没有办法在没有系统通道的情况下创建应用通道，而Fabric的最新几个版本允许在没有系统通道的情况下搭建应用通道。为了解决这个矛盾并使用Fabric-SDK-GO完成后续的项目开发，所以只能将Fabric做降级。出现这种错误是因为在docker配置文件中指定了系统通道文件路径，docker容器会自己创建相关文件。本篇博客不会完整地介绍整个系统通道的搭建过程，这里主要是为了配合使用Fabric-SDK-GO。接下来使用如下命令创建应用通道并配置各个组织的锚节点。

写在最前

  在使用Fabric-SDK-Go@1.0.0操作Fabric网络时遇到了bug。Fabric-SDK-GO的当前版本没有办法在没有系统通道的情况下创建应用通道，而Fabric的最新几个版本允许在没有系统通道的情况下搭建应用通道。为了解决这个矛盾并使用Fabric-SDK-GO完成后续的项目开发，所以只能将Fabric做降级。这里使用的Fabric版本为：2.2.10。
  本篇博客不会完整地介绍整个系统通道的搭建过程，这里主要是为了配合使用Fabric-SDK-GO。
  这里依然使用前序博文中的finance_network网络示例来展示应用通道的搭建过程。在使用Fabric2.2搭建该网络时，生成证书及链码链接配置文件的过程可以直接参考博客：https://blog.csdn.net/yeshang_lady/article/details/134113296。 这里就不在赘述了。

1. 创建通道配置文件

在有系统通道的情况下搭建应用通道时，在启动相关docker容器之前，一定要先创建系统通道(应用通道可以等到容器启动之后创建)。所以这里要先创建系统通道配置文件configtx.yaml，其具体内容如下：

# Copyright IBM Corp. All Rights Reserved.
#
# SPDX-License-Identifier: Apache-2.0
#
Organizations:
    - &OrdererOrg
        Name: OrdererOrg
        ID: OrdererMSP
        MSPDir: ./organizations/ordererOrganizations/finance.com/msp
        Policies:
            Readers:
                Type: Signature
                Rule: "OR('OrdererMSP.member')"
            Writers:
                Type: Signature
                Rule: "OR('OrdererMSP.member')"
            Admins:
                Type: Signature
                Rule: "OR('OrdererMSP.admin')"
        OrdererEndpoints:
            - orderer.finance.com:7050
    - &Org1
        Name: Org1MSP
        ID: Org1MSP
        MSPDir: ./organizations/peerOrganizations/org1.finance.com/msp
        AnchorPeers:
            - Host: peer0.org2.finance.com
              Port: 7051
        Policies:
            Readers:
                Type: Signature
                Rule: "OR('Org1MSP.admin', 'Org1MSP.peer', 'Org1MSP.client')"
            Writers:
                Type: Signature
                Rule: "OR('Org1MSP.admin', 'Org1MSP.client')"
            Admins:
                Type: Signature
                Rule: "OR('Org1MSP.admin')"
            Endorsement:
                Type: Signature
                Rule: "OR('Org1MSP.peer')"

    - &Org2
        Name: Org2MSP
        ID: Org2MSP
        MSPDir: ./organizations/peerOrganizations/org2.finance.com/msp
        AnchorPeers:
            - Host: peer0.org2.finance.com
              Port: 9051
        Policies:
            Readers:
                Type: Signature
                Rule: "OR('Org2MSP.admin', 'Org2MSP.peer', 'Org2MSP.client')"
            Writers:
                Type: Signature
                Rule: "OR('Org2MSP.admin', 'Org2MSP.client')"
            Admins:
                Type: Signature
                Rule: "OR('Org2MSP.admin')"
            Endorsement:
                Type: Signature
                Rule: "OR('Org2MSP.peer')"

Capabilities:
    Channel: &ChannelCapabilities
        V2_0: true
    Orderer: &OrdererCapabilities
        V2_0: true
    Application: &ApplicationCapabilities
        V2_0: true
        
Application: &ApplicationDefaults
    Organizations:
    Policies:
        Readers:
            Type: ImplicitMeta
            Rule: "ANY Readers"
        Writers:
            Type: ImplicitMeta
            Rule: "ANY Writers"
        Admins:
            Type: ImplicitMeta
            Rule: "MAJORITY Admins"
        LifecycleEndorsement:
            Type: ImplicitMeta
            Rule: "MAJORITY Endorsement"
        Endorsement:
            Type: ImplicitMeta
            Rule: "MAJORITY Endorsement"

    Capabilities:
        <<: *ApplicationCapabilities
Orderer: &OrdererDefaults
    OrdererType: etcdraft
    Addresses:
        - orderer.finance.com:7050

    EtcdRaft:
        Consenters:
        - Host: orderer.finance.com
          Port: 7050
          ClientTLSCert: ./organizations/ordererOrganizations/finance.com/orderers/orderer.finance.com/tls/server.crt
          ServerTLSCert: ./organizations/ordererOrganizations/finance.com/orderers/orderer.finance.com/tls/server.crt
    BatchTimeout: 2s
    BatchSize:
        MaxMessageCount: 10
        AbsoluteMaxBytes: 99 MB
        PreferredMaxBytes: 512 KB
    Organizations:
    Policies:
        Readers:
            Type: ImplicitMeta
            Rule: "ANY Readers"
        Writers:
            Type: ImplicitMeta
            Rule: "ANY Writers"
        Admins:
            Type: ImplicitMeta
            Rule: "MAJORITY Admins"
        BlockValidation:
            Type: ImplicitMeta
            Rule: "ANY Writers"

Channel: &ChannelDefaults
    Policies:
        Readers:
            Type: ImplicitMeta
            Rule: "ANY Readers"
        Writers:
            Type: ImplicitMeta
            Rule: "ANY Writers"
        Admins:
            Type: ImplicitMeta
            Rule: "MAJORITY Admins"
    Capabilities:
        <<: *ChannelCapabilities

Profiles:

    TwoOrgsOrdererGenesis:
        <<: *ChannelDefaults
        Orderer:
            <<: *OrdererDefaults
            Organizations:
                - *OrdererOrg
            Capabilities:
                <<: *OrdererCapabilities
        Consortiums:
            SampleConsortium:
                Organizations:
                    - *Org1
                    - *Org2
    TwoOrgsChannel:
        Consortium: SampleConsortium
        <<: *ChannelDefaults
        Application:
            <<: *ApplicationDefaults
            Organizations:
                - *Org1
                - *Org2
            Capabilities:
                <<: *ApplicationCapabilities

接着，便可以创建系统通道了：

#在finance_network目录下执行
configtxgen -profile TwoOrgsOrdererGenesis -channelID system-channel -outputBlock ./system-genesis-block/genesis.block -configPath ./

如果在启动docker容器之前没有创建系统通道的话，可能会提示如下错误：panic: unable to bootstrap orderer. Error reading genesis block file: read /var/hyperledger/orderer/orderer.genesis.block: is a directory。
在这里插入图片描述
出现这种错误是因为在docker配置文件中指定了系统通道文件路径，docker容器会自己创建相关文件。

2. 创建docker配置文件

这里创建compose/compose-withsystem.yaml文件作为docker容器配置文件，这里要增加系统通道相关的环境变量。文件具体内容如下：

# Copyright IBM Corp. All Rights Reserved.
#
# SPDX-License-Identifier: Apache-2.0
#
version: '2.1'

volumes:
  orderer.finance.com:
  peer0.org1.finance.com:
  peer1.org1.finance.com:
  peer0.org2.finance.com:

networks:
  test:
    name: fabric_finance

services:
  orderer.finance.com:
    container_name: orderer.finance.com
    image: hyperledger/fabric-orderer:latest
    environment:
      - FABRIC_LOGGING_SPEC=INFO
      - ORDERER_GENERAL_LISTENADDRESS=0.0.0.0
      - ORDERER_GENERAL_LISTENPORT=7050
      - ORDERER_GENERAL_GENESISMETHOD=file
      - ORDERER_GENERAL_GENESISFILE=/var/hyperledger/orderer/orderer.genesis.block
      - ORDERER_GENERAL_BOOTSTRAPMETHOD=file
      - ORDERER_GENERAL_LOCALMSPID=OrdererMSP
      - ORDERER_GENERAL_LOCALMSPDIR=/var/hyperledger/orderer/msp
      - ORDERER_OPERATIONS_LISTENADDRESS=orderer.finance.com:9443
      # enabled TLS
      - ORDERER_GENERAL_TLS_ENABLED=true
      - ORDERER_GENERAL_TLS_PRIVATEKEY=/var/hyperledger/orderer/tls/server.key
      - ORDERER_GENERAL_TLS_CERTIFICATE=/var/hyperledger/orderer/tls/server.crt
      - ORDERER_GENERAL_TLS_ROOTCAS=[/var/hyperledger/orderer/tls/ca.crt]
      - ORDERER_KAFKA_TOPIC_REPLICATIONFACTOR=1
      - ORDERER_KAFKA_VERBOSE=true
      - ORDERER_GENERAL_CLUSTER_CLIENTCERTIFICATE=/var/hyperledger/orderer/tls/server.crt
      - ORDERER_GENERAL_CLUSTER_CLIENTPRIVATEKEY=/var/hyperledger/orderer/tls/server.key
      - ORDERER_GENERAL_CLUSTER_ROOTCAS=[/var/hyperledger/orderer/tls/ca.crt]
    working_dir: /opt/gopath/src/github.com/hyperledger/fabric
    command: orderer
    volumes:
        - ../system-genesis-block/genesis.block:/var/hyperledger/orderer/orderer.genesis.block
        - ../organizations/ordererOrganizations/finance.com/orderers/orderer.finance.com/msp:/var/hyperledger/orderer/msp
        - ../organizations/ordererOrganizations/finance.com/orderers/orderer.finance.com/tls/:/var/hyperledger/orderer/tls
        - orderer.finance.com:/var/hyperledger/production/orderer
    ports:
      - 7050:7050
      - 9443:9443
    networks:
      - test

  peer0.org1.finance.com:
    container_name: peer0.org1.finance.com
    image: hyperledger/fabric-peer:latest
    environment:
      #Generic peer variables
      - CORE_VM_ENDPOINT=unix:///host/var/run/docker.sock
      - CORE_VM_DOCKER_HOSTCONFIG_NETWORKMODE=fabric_finance
      - FABRIC_LOGGING_SPEC=INFO
      #- FABRIC_LOGGING_SPEC=DEBUG
      - CORE_PEER_TLS_ENABLED=true
      - CORE_PEER_PROFILE_ENABLED=true
      - CORE_PEER_TLS_CERT_FILE=/etc/hyperledger/fabric/tls/server.crt
      - CORE_PEER_TLS_KEY_FILE=/etc/hyperledger/fabric/tls/server.key
      - CORE_PEER_TLS_ROOTCERT_FILE=/etc/hyperledger/fabric/tls/ca.crt
      # Peer specific variabes
      - CORE_PEER_ID=peer0.org1.finance.com
      - CORE_PEER_ADDRESS=peer0.org1.finance.com:7051
      - CORE_PEER_LISTENADDRESS=0.0.0.0:7051
      - CORE_PEER_CHAINCODEADDRESS=peer0.org1.finance.com:7052
      - CORE_PEER_CHAINCODELISTENADDRESS=0.0.0.0:7052
      - CORE_PEER_GOSSIP_BOOTSTRAP=peer0.org1.finance.com:7051
      - CORE_PEER_GOSSIP_EXTERNALENDPOINT=peer0.org1.finance.com:7051
      - CORE_PEER_LOCALMSPID=Org1MSP
      - CORE_OPERATIONS_LISTENADDRESS=peer0.org1.finance.com:9444
    volumes:
        - /var/run/docker.sock:/host/var/run/docker.sock
        - ../organizations/peerOrganizations/org1.finance.com/peers/peer0.org1.finance.com/msp:/etc/hyperledger/fabric/msp
        - ../organizations/peerOrganizations/org1.finance.com/peers/peer0.org1.finance.com/tls:/etc/hyperledger/fabric/tls
        - peer0.org1.finance.com:/var/hyperledger/production
    working_dir: /opt/gopath/src/github.com/hyperledger/fabric/peer
    command: peer node start
    ports:
      - 7051:7051
      - 9444:9444
    networks:
      - test

  peer1.org1.finance.com:
    container_name: peer1.org1.finance.com
    image: hyperledger/fabric-peer:latest
    environment:
      #Generic peer variables
      - CORE_VM_ENDPOINT=unix:///host/var/run/docker.sock
      - CORE_VM_DOCKER_HOSTCONFIG_NETWORKMODE=fabric_finance
      - FABRIC_LOGGING_SPEC=INFO
      #- FABRIC_LOGGING_SPEC=DEBUG
      - CORE_PEER_TLS_ENABLED=true
      - CORE_PEER_PROFILE_ENABLED=true
      - CORE_PEER_TLS_CERT_FILE=/etc/hyperledger/fabric/tls/server.crt
      - CORE_PEER_TLS_KEY_FILE=/etc/hyperledger/fabric/tls/server.key
      - CORE_PEER_TLS_ROOTCERT_FILE=/etc/hyperledger/fabric/tls/ca.crt
      # Peer specific variabes
      - CORE_PEER_ID=peer1.org1.finance.com
      - CORE_PEER_ADDRESS=peer1.org1.finance.com:8051
      - CORE_PEER_LISTENADDRESS=0.0.0.0:8051
      - CORE_PEER_CHAINCODEADDRESS=peer1.org1.finance.com:8052
      - CORE_PEER_CHAINCODELISTENADDRESS=0.0.0.0:8052
      - CORE_PEER_GOSSIP_BOOTSTRAP=peer1.org1.finance.com:8051
      - CORE_PEER_GOSSIP_EXTERNALENDPOINT=peer1.org1.finance.com:8051
      - CORE_PEER_LOCALMSPID=Org1MSP
      - CORE_OPERATIONS_LISTENADDRESS=peer1.org1.finance.com:9446
    volumes:
        - /var/run/docker.sock:/host/var/run/docker.sock
        - ../organizations/peerOrganizations/org1.finance.com/peers/peer1.org1.finance.com/msp:/etc/hyperledger/fabric/msp
        - ../organizations/peerOrganizations/org1.finance.com/peers/peer1.org1.finance.com/tls:/etc/hyperledger/fabric/tls
        - peer1.org1.finance.com:/var/hyperledger/production
    working_dir: /opt/gopath/src/github.com/hyperledger/fabric/peer
    command: peer node start
    ports:
      - 8051:8051
      - 9446:9446
    networks:
      - test

  peer0.org2.finance.com:
    container_name: peer0.org2.finance.com
    image: hyperledger/fabric-peer:latest
    environment:
      #Generic peer variables
      - CORE_VM_ENDPOINT=unix:///host/var/run/docker.sock
      - CORE_VM_DOCKER_HOSTCONFIG_NETWORKMODE=fabric_test
      - FABRIC_LOGGING_SPEC=INFO
      #- FABRIC_LOGGING_SPEC=DEBUG
      - CORE_PEER_TLS_ENABLED=true
      - CORE_PEER_PROFILE_ENABLED=true
      - CORE_PEER_TLS_CERT_FILE=/etc/hyperledger/fabric/tls/server.crt
      - CORE_PEER_TLS_KEY_FILE=/etc/hyperledger/fabric/tls/server.key
      - CORE_PEER_TLS_ROOTCERT_FILE=/etc/hyperledger/fabric/tls/ca.crt
      # Peer specific variabes
      - CORE_PEER_ID=peer0.org2.finance.com
      - CORE_PEER_ADDRESS=peer0.org2.finance.com:9051
      - CORE_PEER_LISTENADDRESS=0.0.0.0:9051
      - CORE_PEER_CHAINCODEADDRESS=peer0.org2.finance.com:9052
      - CORE_PEER_CHAINCODELISTENADDRESS=0.0.0.0:9052
      - CORE_PEER_GOSSIP_EXTERNALENDPOINT=peer0.org2.finance.com:9051
      - CORE_PEER_GOSSIP_BOOTSTRAP=peer0.org2.finance.com:9051
      - CORE_PEER_LOCALMSPID=Org2MSP
      - CORE_OPERATIONS_LISTENADDRESS=peer0.org2.finance.com:9445
    volumes:
        - /var/run/docker.sock:/host/var/run/docker.sock
        - ../organizations/peerOrganizations/org2.finance.com/peers/peer0.org2.finance.com/msp:/etc/hyperledger/fabric/msp
        - ../organizations/peerOrganizations/org2.finance.com/peers/peer0.org2.finance.com/tls:/etc/hyperledger/fabric/tls
        - peer0.org2.finance.com:/var/hyperledger/production
    working_dir: /opt/gopath/src/github.com/hyperledger/fabric/peer
    command: peer node start
    ports:
      - 9051:9051
      - 9445:9445
    networks:
      - test

  cli:
    container_name: cli
    image: hyperledger/fabric-tools:latest
    tty: true
    stdin_open: true
    environment:
      - GOPATH=/opt/gopath
      - CORE_VM_ENDPOINT=unix:///host/var/run/docker.sock
      - FABRIC_LOGGING_SPEC=INFO
      #- FABRIC_LOGGING_SPEC=DEBUG
    working_dir: /opt/gopath/src/github.com/hyperledger/fabric/peer
    command: /bin/bash
    volumes:
        - /var/run/:/host/var/run/
        - ../organizations:/opt/gopath/src/github.com/hyperledger/fabric/peer/organizations
        - ../scripts:/opt/gopath/src/github.com/hyperledger/fabric/peer/scripts/
    depends_on:
      - peer0.org1.finance.com
      - peer1.org1.finance.com
      - peer0.org2.finance.com
    networks:
      - test

然后启动容器，具体命令如下：

#在finance_network目录下执行
sudo DOCKER_SOCK="/var/run/docker.sock" docker-compose -f compose/compose-withsystem.yaml up -d

创建应用通道及配置锚节点

接下来使用如下命令创建应用通道并配置各个组织的锚节点。

#创建应用通道
configtxgen -profile TwoOrgsChannel -outputCreateChannelTx ./channel-artifacts/channel.tx -channelID mychannel
#设置组织Org1的锚节点
configtxgen -profile TwoOrgsChannel -outputAnchorPeersUpdate ./channel-artifacts/Org1MSPanchors.tx -channelID mychannel -asOrg Org1MSP
#设置组织Org2的锚节点
configtxgen -profile TwoOrgsChannel -outputAnchorPeersUpdate ./channel-artifacts/Org2MSPanchors.tx -channelID mychannel -asOrg Org2MSP

接下来的peer节点加入通道及部署链码等的操作将使用Fabric-sdk-go来实现，具体参考博客：https://blog.csdn.net/yeshang_lady/article/details/134921528。
Tips:在使用Fabric-SDK-GO进行后续操作的时候，要对docker容器进行重启(注意，只需要重启docker容器)。因为Fabric-SDK-GO会依据我们生成的文件(channel.tx、Org1MSPanchors.tx、Org2MSPanchors.tx)重新进行创建应用通道及配置锚节点等操作。如果不重启，则会提示如下错误： create channel failed: create channel failed: SendEnvelope failed: calling orderer 'orderer.finance.com:7050' failed: Orderer Server Status Code: (400) BAD_REQUEST. Description: error applying config update to existing channel 'mychannel': error authorizing update: error validating ReadSet: proposed update requires that key [Group] /Channel/Application be at version 0, but it is currently at version 1

原文地址:https://blog.csdn.net/yeshang_lady/article/details/135556094

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