Hyperledger Fabric Peer容器无法启动：CouchDB连接失败求助

我在CentOS7服务器上部署了Hyperledger Fabric 1.4.4版本，最近碰到了一个棘手的问题——Peer容器一直启动失败，日志里反复提示无法连接CouchDB。但奇怪的是，CouchDB容器明明是正常运行的，我甚至尝试在docker-compose.yml里添加了GODEBUG=netdns=go参数来解决DNS解析的问题，结果还是没能搞定，这个问题已经困扰我好几周了，实在没办法了来求助！

下面是Peer容器的报错日志和我的docker-compose.yml配置，麻烦各位帮我看看问题出在哪：

Peer容器报错日志 #

2020-01-30 11:03:43.890 UTC [nodeCmd] serve -> INFO 001 Starting peer: Version: 1.4.4 Commit SHA: 7917a40 Go version: go1.12.12 OS/Arch: linux/amd64 Chaincode: Base Image Version: 0.4.18 Base Docker Namespace: hyperledger Base Docker Label: org.hyperledger.fabric Docker Namespace: hyperledger
2020-01-30 11:03:43.891 UTC [ledgermgmt] initialize -> INFO 002 Initializing ledger mgmt
2020-01-30 11:03:43.891 UTC [kvledger] NewProvider -> INFO 003 Initializing ledger provider
2020-01-30 11:03:43.921 UTC [kvledger] NewProvider -> INFO 004 ledger provider Initialized
panic: Error initializing ledger provider: unable to connect to CouchDB, check the hostname and port: error unmarshalling json data: invalid character '<' looking for beginning of value
goroutine 1 [running]:
github.com/hyperledger/fabric/core/ledger/ledgermgmt.initialize(0xc0003045a0)
	/opt/gopath/src/github.com/hyperledger/fabric/core/ledger/ledgermgmt/ledger_mgmt.go:81 +0x78a
github.com/hyperledger/fabric/core/ledger/ledgermgmt.Initialize.func1()
	/opt/gopath/src/github.com/hyperledger/fabric/core/ledger/ledgermgmt/ledger_mgmt.go:53 +0x2a
sync.(*Once).Do(0x26d0748, 0xc0003ed458)
	/opt/go/src/sync/once.go:44 +0xb3
github.com/hyperledger/fabric/core/ledger/ledgermgmt.Initialize(0xc0003045a0)
	/opt/gopath/src/github.com/hyperledger/fabric/core/ledger/ledgermgmt/ledger_mgmt.go:52 +0x55
github.com/hyperledger/fabric/peer/node.serve(0x26d0668, 0x0, 0x0, 0x0, 0x0)
	/opt/gopath/src/github.com/hyperledger/fabric/peer/node/start.go:181 +0x568
github.com/hyperledger/fabric/peer/node.glob..func3(0x25c7240, 0x26d0668, 0x0, 0x0, 0x0, 0x0)
	/opt/gopath/src/github.com/hyperledger/fabric/peer/node/start.go:126 +0xf1
github.com/hyperledger/fabric/vendor/github.com/spf13/cobra.(*Command).execute(0x25c7240, 0x26d0668, 0x0, 0x0, 0x25c7240, 0x26d0668)
	/opt/gopath/src/github.com/hyperledger/fabric/vendor/github.com/spf13/cobra/command.go:762 +0x465
github.com/hyperledger/fabric/vendor/github.com/spf13/cobra.(*Command).ExecuteC(0x25c7960, 0xc0003edf60, 0x1, 0x1)
	/opt/gopath/src/github.com/hyperledger/fabric/vendor/github.com/spf13/cobra/command.go:852 +0x2ec
github.com/hyperledger/fabric/vendor/github.com/spf13/cobra.(*Command).Execute(...)
	/opt/gopath/src/github.com/hyperledger/fabric/vendor/github.com/spf13/cobra/command.go:800
main.main()
	/opt/gopath/src/github.com/hyperledger/fabric/peer/main.go:53 +0x41f

docker-compose.yml配置 #

#
# Copyright IBM Corp All Rights Reserved
#
# SPDX-License-Identifier: Apache-2.0
#
version: '2'

networks:
  basic:

services:
  ca.example.com:
    image: hyperledger/fabric-ca
    environment:
      - FABRIC_CA_HOME=/etc/hyperledger/fabric-ca-server
      - FABRIC_CA_SERVER_CA_NAME=ca.example.com
      - FABRIC_CA_SERVER_CA_CERTFILE=/etc/hyperledger/fabric-ca-server-config/ca.org1.example.com-cert.pem
      - FABRIC_CA_SERVER_CA_KEYFILE=/etc/hyperledger/fabric-ca-server-config/4239aa0dcd76daeeb8ba0cda701851d14504d31aad1b2ddddbac6a57365e497c_sk
    ports:
      - "7054:7054"
    command: sh -c 'fabric-ca-server start -b admin:adminpw'
    volumes:
      - ./crypto-config/peerOrganizations/org1.example.com/ca/:/etc/hyperledger/fabric-ca-server-config
    container_name: ca.example.com
    networks:
      - basic

  orderer.example.com:
    container_name: orderer.example.com
    image: hyperledger/fabric-orderer
    environment:
      - FABRIC_LOGGING_SPEC=info
      - ORDERER_GENERAL_LISTENADDRESS=peer0.org1.example.com
      - ORDERER_GENERAL_GENESISMETHOD=file
      - ORDERER_GENERAL_GENESISFILE=/etc/hyperledger/configtx/genesis.block
      - ORDERER_GENERAL_LOCALMSPID=OrdererMSP
      - ORDERER_GENERAL_LOCALMSPDIR=/etc/hyperledger/msp/orderer/msp
      - GODEBUG=netdns=go
    working_dir: /opt/gopath/src/github.com/hyperledger/fabric/orderer
    command: orderer
    ports:
      - 7050:7050
    volumes:
      - ./config/:/etc/hyperledger/configtx
      - ./crypto-config/ordererOrganizations/example.com/orderers/orderer.example.com/:/etc/hyperledger/msp/orderer
      - ./crypto-config/peerOrganizations/org1.example.com/peers/peer0.org1.example.com/:/etc/hyperledger/msp/peerOrg1
    networks:
      - basic

  peer0.org1.example.com:
    container_name: peer0.org1.example.com
    image: hyperledger/fabric-peer
    environment:
      - CORE_VM_ENDPOINT=unix:///host/var/run/docker.sock
      - CORE_PEER_ID=peer0.org1.example.com
      - FABRIC_LOGGING_SPEC=info
      - CORE_CHAINCODE_LOGGING_LEVEL=info
      - CORE_PEER_LOCALMSPID=Org1MSP
      - CORE_PEER_MSPCONFIGPATH=/etc/hyperledger/msp/peer/
      - CORE_PEER_ADDRESS=peer0.org1.example.com:7051
      #
      # the following setting starts chaincode containers on the same
      # bridge network as the peers
      # https://docs.docker.com/compose/networking/
      #
      - CORE_VM_DOCKER_HOSTCONFIG_NETWORKMODE=${COMPOSE_PROJECT_NAME}_basic
      - CORE_LEDGER_STATE_STATEDATABASE=CouchDB
      - CORE_LEDGER_STATE_COUCHDBCONFIG_COUCHDBADDRESS=couchdb:5984
      # The CORE_LEDGER_STATE_COUCHDBCONFIG_USERNAME and CORE_LEDGER_STATE_COUCHDBCONFIG_PASSWORD
      # provide the credentials for ledger to connect to CouchDB. The username and password must
      # match the username and password set for the associated CouchDB.
      - CORE_LEDGER_STATE_COUCHDBCONFIG_USERNAME=
      - CORE_LEDGER_STATE_COUCHDBCONFIG_PASSWORD=
      - GODEBUG=netdns=go
    working_dir: /opt/gopath/src/github.com/hyperledger/fabric
    command: peer node start
    # command: peer node start --peer-chaincodedev=true
    ports:
      - 7051:7051
      - 7053:7053
    volumes:
      - /var/run/:/host/var/run/
      - ./crypto-config/peerOrganizations/org1.example.com/peers/peer0.org1.example.com/msp:/etc/hyperledger/msp/peer
      - ./crypto-config/peerOrganizations/org1.example.com/users:/etc/hyperledger/msp/users
      - ./config:/etc/hyperledger/configtx
    depends_on:
      - orderer.example.com
      - couchdb
    networks:
      - basic

  couchdb:
    container_name: couchdb
    image: hyperledger/fabric-couchdb
    # Populate the COUCHDB_USER and COUCHDB_PASSWORD to set an admin user and password
    # for CouchDB. This will prevent CouchDB from operating in an "Admin Party" mode.
    environment:
      - COUCHDB_USER=
      - COUCHDB_PASSWORD=
    ports:
      - 5984:5984
    networks:
      - basic

  cli:
    container_name: cli
    image: hyperledger/fabric-tools
    tty: true
    environment:
      - GOPATH=/opt/gopath
      - CORE_VM_ENDPOINT=unix:///host/var/run/docker.sock
      - FABRIC_LOGGING_SPEC=info
      - CORE_PEER_ID=cli
      - CORE_PEER_ADDRESS=peer0.org1.example.com:7051
      - CORE_PEER_LOCALMSPID=Org1MSP
      - CORE_PEER_MSPCONFIGPATH=/opt/gopath/src/github.com/hyperledger/fabric/peer/crypto/peerOrganizations/org1.example.com/users/Admin@org1.example.com/msp
      - CORE_CHAINCODE_KEEPALIVE=10
    working_dir: /opt/gopath/src/github.com/hyperledger/fabric/peer
    command: /bin/bash
    volumes:
      - /var/run/:/host/var/run/
      - ./../chaincode/:/opt/gopath/src/github.com/
      - ./crypto-config:/opt/gopath/src/github.com/hyperledger/fabric/peer/crypto/
    networks:
      - basic
    # depends_on:
    #- orderer.example.com
    #- peer0.org1.example.com
    #- couchdb

内容的提问来源于stack exchange，提问作者Nitish Gupta