Hyperledger Fabric 1.2系列：3.启动first-network网络，解析byfn.sh启动脚本

简介

在启动网络之前，确保你已经安装了所必要的依赖。如果没有安装，请参考之前的两篇内容。

启动网络

进入fabric-samples/first-network文件夹内，执行byfn.sh脚本

cd fabric-samples/first-network
./byfn.sh

之后你会看到如下内容，则表示成功了：

Querying chaincode on peer1.org2...
===================== Querying on peer1.org2 on channel 'mychannel'... =====================
+ peer chaincode query -C mychannel -n mycc -c '{"Args":["query","a"]}'
Attempting to Query peer1.org2 ...3 secs
+ res=0
+ set +x

90
===================== Query successful on peer1.org2 on channel 'mychannel' =====================

========= All GOOD, BYFN execution completed ===========


 _____   _   _   ____
| ____| | \ | | |  _ \
|  _|   |  \| | | | | |
| |___  | |\  | | |_| |
|_____| |_| \_| |____/

脚本解析

脚本的执行内容讲解

脚本的github地址：https://github.com/hyperledger/fabric-samples/blob/release-1.2/first-network/byfn.sh

也可以查看这个地址：https://www.jianshu.com/p/6aa318eb938f

# Obtain the OS and Architecture string that will be used to select the correct
# native binaries for your platform, e.g., darwin-amd64 or linux-amd64
OS_ARCH=$(echo "$(uname -s | tr '[:upper:]' '[:lower:]' | sed 's/mingw64_nt.*/windows/')-$(uname -m | sed 's/x86_64/amd64/g')" | awk '{print tolower($0)}')      
# timeout duration - the duration the CLI should wait for a response from
# another container before giving up
CLI_TIMEOUT=10
# default for delay between commands
CLI_DELAY=3
# channel name defaults to "mychannel"
CHANNEL_NAME="mychannel"
# use this as the default docker-compose yaml definition
COMPOSE_FILE=docker-compose-cli.yaml
#
COMPOSE_FILE_COUCH=docker-compose-couch.yaml
# org3 docker compose file
COMPOSE_FILE_ORG3=docker-compose-org3.yaml
#
# use golang as the default language for chaincode
LANGUAGE=golang
# default image tag
IMAGETAG="latest"
# Parse commandline args

OS_ARCH //系统的架构
CLI_TIMEOUT // cli的超时时间
CHANNEL_NAME //通道的名字
COMPOSE_FILE //指定默认的配置文件
COMPOSE_FILE_COUCH //指定默认的couchdb配置文件
COMPOSE_FILE_ORG3 // 指定组织3的配置文件
LANGUAGE //指定默认的语言
IMAGETAG //指定默认的镜像标签

if [ "$1" = "-m" ]; then # supports old usage, muscle memory is powerful!
  shift
fi
MODE=$1
shift
# Determine whether starting, stopping, restarting, generating or upgrading
if [ "$MODE" == "up" ]; then
  EXPMODE="Starting"
elif [ "$MODE" == "down" ]; then
  EXPMODE="Stopping"
elif [ "$MODE" == "restart" ]; then
  EXPMODE="Restarting"
elif [ "$MODE" == "generate" ]; then
  EXPMODE="Generating certs and genesis block"
elif [ "$MODE" == "upgrade" ]; then
  EXPMODE="Upgrading the network"
else
  printHelp
  exit 1
fi

根据命令行参数配置相关的内容。

while getopts "h?c:t:d:f:s:l:i:v" opt; do
  case "$opt" in
  h | \?)
    printHelp
    exit 0
    ;;
  c)
    CHANNEL_NAME=$OPTARG
    ;;
  t)
    CLI_TIMEOUT=$OPTARG
    ;;
  d)
    CLI_DELAY=$OPTARG
    ;;
  f)
    COMPOSE_FILE=$OPTARG
    ;;
  s)
    IF_COUCHDB=$OPTARG
    ;;
  l)
    LANGUAGE=$OPTARG
    ;;
  i)
    IMAGETAG=$(go env GOARCH)"-"$OPTARG
    ;;
  v)
    VERBOSE=true
    ;;
  esac
done

使用getopts命令来获取命令行参数，搭配case来根据条件赋值。

简单的getopts相关的介绍，请参考：https://segmentfault.com/a/1190000010171506

如果你想启动couchdb的话，你需要在启动网络的时候，携带上-s couchdb参数。例如：./byfn.sh -s couched

# Announce what was requested

if [ "${IF_COUCHDB}" == "couchdb" ]; then
  echo
  echo "${EXPMODE} for channel '${CHANNEL_NAME}' with CLI timeout of '${CLI_TIMEOUT}' seconds and CLI delay of '${CLI_DELAY}' seconds and using database '${IF_COUCHDB}'"
else
  echo "${EXPMODE} for channel '${CHANNEL_NAME}' with CLI timeout of '${CLI_TIMEOUT}' seconds and CLI delay of '${CLI_DELAY}' seconds"
fi

判断对应的变量，打印相关的信息。

# ask for confirmation to proceed
askProceed

#Create the network using docker compose
if [ "${MODE}" == "up" ]; then
  networkUp
elif [ "${MODE}" == "down" ]; then ## Clear the network
  networkDown
elif [ "${MODE}" == "generate" ]; then ## Generate Artifacts
  generateCerts
  replacePrivateKey
  generateChannelArtifacts
elif [ "${MODE}" == "restart" ]; then ## Restart the network
  networkDown
  networkUp
elif [ "${MODE}" == "upgrade" ]; then ## Upgrade the network from version 1.1.x to 1.2.x
  upgradeNetwork
else
  printHelp
  exit 1
fi

如果命令行输入的是./byfn.sh up或者./byfn.sh -m up则会执行networkUp函数。下面的函数以此类推。

函数内容讲解

askProceed

# Ask user for confirmation to proceed
function askProceed() {
  read -p "Continue? [Y/n] " ans
  case "$ans" in
  y | Y | "")
    echo "proceeding ..."
    ;;
  n | N)
    echo "exiting..."
    exit 1
    ;;
  *)
    echo "invalid response"
    askProceed
    ;;
  esac
}

询问是否继续。输入y或者Y则继续脚本的执行。输入n或则N则停止执行脚本。

#### clearContainers
function clearContainers() {
  CONTAINER_IDS=$(docker ps -a | awk '($2 ~ /dev-peer.*.mycc.*/) {print $1}')
  if [ -z "$CONTAINER_IDS" -o "$CONTAINER_IDS" == " " ]; then
    echo "---- No containers available for deletion ----"
  else
    docker rm -f $CONTAINER_IDS
  fi
}

function removeUnwantedImages() {
  DOCKER_IMAGE_IDS=$(docker images | awk '($1 ~ /dev-peer.*.mycc.*/) {print $3}')
  if [ -z "$DOCKER_IMAGE_IDS" -o "$DOCKER_IMAGE_IDS" == " " ]; then
    echo "---- No images available for deletion ----"
  else
    docker rmi -f $DOCKER_IMAGE_IDS
  fi
}

如果链码容器存在，则删除掉容器。否则输出打印信息。

checkPrereqs

# Versions of fabric known not to work with this release of first-network
BLACKLISTED_VERSIONS="^1\.0\. ^1\.1\.0-preview ^1\.1\.0-alpha"

# Do some basic sanity checking to make sure that the appropriate versions of fabric
# binaries/images are available.  In the future, additional checking for the presence
# of go or other items could be added.
function checkPrereqs() {
  # Note, we check configtxlator externally because it does not require a config file, and peer in the
  # docker image because of FAB-8551 that makes configtxlator return 'development version' in docker
  LOCAL_VERSION=$(configtxlator version | sed -ne 's/ Version: //p')
  DOCKER_IMAGE_VERSION=$(docker run --rm hyperledger/fabric-tools:$IMAGETAG peer version | sed -ne 's/ Version: //p' | head -1)

  echo "LOCAL_VERSION=$LOCAL_VERSION"
  echo "DOCKER_IMAGE_VERSION=$DOCKER_IMAGE_VERSION"

  if [ "$LOCAL_VERSION" != "$DOCKER_IMAGE_VERSION" ]; then
    echo "=================== WARNING ==================="
    echo "  Local fabric binaries and docker images are  "
    echo "  out of  sync. This may cause problems.       "
    echo "==============================================="
  fi

  for UNSUPPORTED_VERSION in $BLACKLISTED_VERSIONS; do
    echo "$LOCAL_VERSION" | grep -q $UNSUPPORTED_VERSION
    if [ $? -eq 0 ]; then
      echo "ERROR! Local Fabric binary version of $LOCAL_VERSION does not match this newer version of BYFN and is unsupported. Either move to a later version of Fabric or checkout an earlier version of fabric-samples."
      exit 1
    fi

    echo "$DOCKER_IMAGE_VERSION" | grep -q $UNSUPPORTED_VERSION
    if [ $? -eq 0 ]; then
      echo "ERROR! Fabric Docker image version of $DOCKER_IMAGE_VERSION does not match this newer version of BYFN and is unsupported. Either move to a later version of Fabric or checkout an earlier version of fabric-samples."
      exit 1
    fi
  done
}

设置当前不支持的版本号

BLACKLISTED_VERSIONS="^1\.0\. ^1\.1\.0-preview ^1\.1\.0-alpha"

检查版本是否符合要求。

networkUp

# Generate the needed certificates, the genesis block and start the network.
function networkUp() {
  checkPrereqs
  # generate artifacts if they don't exist
  if [ ! -d "crypto-config" ]; then
    generateCerts
    replacePrivateKey
    generateChannelArtifacts
  fi
  if [ "${IF_COUCHDB}" == "couchdb" ]; then
    IMAGE_TAG=$IMAGETAG docker-compose -f $COMPOSE_FILE -f $COMPOSE_FILE_COUCH up -d 2>&1
  else
    IMAGE_TAG=$IMAGETAG docker-compose -f $COMPOSE_FILE up -d 2>&1
  fi
  if [ $? -ne 0 ]; then
    echo "ERROR !!!! Unable to start network"
    exit 1
  fi
  # now run the end to end script
  docker exec cli scripts/script.sh $CHANNEL_NAME $CLI_DELAY $LANGUAGE $CLI_TIMEOUT $VERBOSE
  if [ $? -ne 0 ]; then
    echo "ERROR !!!! Test failed"
    exit 1
  fi
}

这是启动网络的函数。

先调用checkPrereqs函数，检查版本是否符合要求。
再检查crypto-config文件夹是否存在，如果不存在，则调用generateCerts、replacePrivateKey、generateChannelArtifacts。
判断是否指定了couchdb。
之后，进入cli容器，执行scripts/script.sh脚本

upgradeNetwork

function upgradeNetwork() {
  docker inspect -f '{{.Config.Volumes}}' orderer.example.com | grep -q '/var/hyperledger/production/orderer'
  if [ $? -ne 0 ]; then
    echo "ERROR !!!! This network does not appear to be using volumes for its ledgers, did you start from fabric-samples >= v1.1.x?"
    exit 1
  fi

  LEDGERS_BACKUP=./ledgers-backup

  # create ledger-backup directory
  mkdir -p $LEDGERS_BACKUP

  export IMAGE_TAG=$IMAGETAG
  if [ "${IF_COUCHDB}" == "couchdb" ]; then
    COMPOSE_FILES="-f $COMPOSE_FILE -f $COMPOSE_FILE_COUCH"
  else
    COMPOSE_FILES="-f $COMPOSE_FILE"
  fi

  # removing the cli container
  docker-compose $COMPOSE_FILES stop cli
  docker-compose $COMPOSE_FILES up -d --no-deps cli

  echo "Upgrading orderer"
  docker-compose $COMPOSE_FILES stop orderer.example.com
  docker cp -a orderer.example.com:/var/hyperledger/production/orderer $LEDGERS_BACKUP/orderer.example.com
  docker-compose $COMPOSE_FILES up -d --no-deps orderer.example.com

  for PEER in peer0.org1.example.com peer1.org1.example.com peer0.org2.example.com peer1.org2.example.com; do
    echo "Upgrading peer $PEER"

    # Stop the peer and backup its ledger
    docker-compose $COMPOSE_FILES stop $PEER
    docker cp -a $PEER:/var/hyperledger/production $LEDGERS_BACKUP/$PEER/

    # Remove any old containers and images for this peer
    CC_CONTAINERS=$(docker ps | grep dev-$PEER | awk '{print $1}')
    if [ -n "$CC_CONTAINERS" ]; then
      docker rm -f $CC_CONTAINERS
    fi
    CC_IMAGES=$(docker images | grep dev-$PEER | awk '{print $1}')
    if [ -n "$CC_IMAGES" ]; then
      docker rmi -f $CC_IMAGES
    fi

    # Start the peer again
    docker-compose $COMPOSE_FILES up -d --no-deps $PEER
  done

  docker exec cli scripts/upgrade_to_v12.sh $CHANNEL_NAME $CLI_DELAY $LANGUAGE $CLI_TIMEOUT $VERBOSE
  if [ $? -ne 0 ]; then
    echo "ERROR !!!! Test failed"
    exit 1
  fi
}

这个函数是用来升级网络的。从1.1升级到1.2。
这个函数会停掉orderer和peers。备份orderer和peers的ledger。清空chaincode容器。
并且会重启orderer和peer 使用latest tag

networkDown

# Tear down running network
function networkDown() {
  # stop org3 containers also in addition to org1 and org2, in case we were running sample to add org3
  docker-compose -f $COMPOSE_FILE -f $COMPOSE_FILE_COUCH -f $COMPOSE_FILE_ORG3 down --volumes --remove-orphans

  # Don't remove the generated artifacts -- note, the ledgers are always removed
  if [ "$MODE" != "restart" ]; then
    # Bring down the network, deleting the volumes
    #Delete any ledger backups
    docker run -v $PWD:/tmp/first-network --rm hyperledger/fabric-tools:$IMAGETAG rm -Rf /tmp/first-network/ledgers-backup
    #Cleanup the chaincode containers
    clearContainers
    #Cleanup images
    removeUnwantedImages
    # remove orderer block and other channel configuration transactions and certs
    rm -rf channel-artifacts/*.block channel-artifacts/*.tx crypto-config ./org3-artifacts/crypto-config/ channel-artifacts/org3.json
    # remove the docker-compose yaml file that was customized to the example
    rm -f docker-compose-e2e.yaml
  fi
}

关闭网络，清空容器、删除生成的证书及一些配置相关内容。

replacePrivateKey

function replacePrivateKey() {
  # sed on MacOSX does not support -i flag with a null extension. We will use
  # 't' for our back-up's extension and delete it at the end of the function
  ARCH=$(uname -s | grep Darwin)
  if [ "$ARCH" == "Darwin" ]; then
    OPTS="-it"
  else
    OPTS="-I"
  fi

  # Copy the template to the file that will be modified to add the private key
  cp docker-compose-e2e-template.yaml docker-compose-e2e.yaml

  # The next steps will replace the template's contents with the
  # actual values of the private key file names for the two CAs.
  CURRENT_DIR=$PWD
  cd crypto-config/peerOrganizations/org1.example.com/ca/
  PRIV_KEY=$(ls *_sk)
  cd "$CURRENT_DIR"
  sed $OPTS "s/CA1_PRIVATE_KEY/${PRIV_KEY}/g" docker-compose-e2e.yaml
  cd crypto-config/peerOrganizations/org2.example.com/ca/
  PRIV_KEY=$(ls *_sk)
  cd "$CURRENT_DIR"
  sed $OPTS "s/CA2_PRIVATE_KEY/${PRIV_KEY}/g" docker-compose-e2e.yaml
  # If MacOSX, remove the temporary backup of the docker-compose file
  if [ "$ARCH" == "Darwin" ]; then
    rm docker-compose-e2e.yamlt
  fi
}

将docker-compose-e2e-template.yaml复制到docker-compose-e2e.yaml。
并替换证书文件到docker-compose-e2e.yaml中的固定位置。

generateCerts

function generateCerts() {
  which cryptogen
  if [ "$?" -ne 0 ]; then
    echo "cryptogen tool not found. exiting"
    exit 1
  fi
  echo
  echo "##########################################################"
  echo "##### Generate certificates using cryptogen tool #########"
  echo "##########################################################"

  if [ -d "crypto-config" ]; then
    rm -Rf crypto-config
  fi
  set -x
  cryptogen generate --config=./crypto-config.yaml
  res=$?
  set +x
  if [ $res -ne 0 ]; then
    echo "Failed to generate certificates..."
    exit 1
  fi
  echo
}

判断cryptogen是否存在。
如果crypto-config目录存在，则删除。

generateChannelArtifacts

function generateChannelArtifacts() {
  which configtxgen
  if [ "$?" -ne 0 ]; then
    echo "configtxgen tool not found. exiting"
    exit 1
  fi

  echo "##########################################################"
  echo "#########  Generating Orderer Genesis block ##############"
  echo "##########################################################"
  # Note: For some unknown reason (at least for now) the block file can't be
  # named orderer.genesis.block or the orderer will fail to launch!
  set -x
  configtxgen -profile TwoOrgsOrdererGenesis -outputBlock ./channel-artifacts/genesis.block
  res=$?
  set +x
  if [ $res -ne 0 ]; then
    echo "Failed to generate orderer genesis block..."
    exit 1
  fi
  echo
  echo "#################################################################"
  echo "### Generating channel configuration transaction 'channel.tx' ###"
  echo "#################################################################"
  set -x
  configtxgen -profile TwoOrgsChannel -outputCreateChannelTx ./channel-artifacts/channel.tx -channelID $CHANNEL_NAME
  res=$?
  set +x
  if [ $res -ne 0 ]; then
    echo "Failed to generate channel configuration transaction..."
    exit 1
  fi

  echo
  echo "#################################################################"
  echo "#######    Generating anchor peer update for Org1MSP   ##########"
  echo "#################################################################"
  set -x
  configtxgen -profile TwoOrgsChannel -outputAnchorPeersUpdate ./channel-artifacts/Org1MSPanchors.tx -channelID $CHANNEL_NAME -asOrg Org1MSP
  res=$?
  set +x
  if [ $res -ne 0 ]; then
    echo "Failed to generate anchor peer update for Org1MSP..."
    exit 1
  fi

  echo
  echo "#################################################################"
  echo "#######    Generating anchor peer update for Org2MSP   ##########"
  echo "#################################################################"
  set -x
  configtxgen -profile TwoOrgsChannel -outputAnchorPeersUpdate \
    ./channel-artifacts/Org2MSPanchors.tx -channelID $CHANNEL_NAME -asOrg Org2MSP
  res=$?
  set +x
  if [ $res -ne 0 ]; then
    echo "Failed to generate anchor peer update for Org2MSP..."
    exit 1
  fi
  echo
}\

通过configtxgen工具，读取configtx.yaml文件来生成genesis.block、channel.tx、每个组织的anchor peer

genesis.block是提供给orderer service的。channel.tx是创建通道时广播给orderer service的文件。anchor peer是每个组织都会有一个，参与通信的节点。

涉及的文件

在生成证书时cryptogen读取crypto-config.yaml文件。
将docker-compose-e2e-template.yaml复制为docker-compose-e2e.yaml
configtxgen读取configtx.yaml文件。
启动网络时读取docker-compose-cli.yaml如果启用了couchdb则还会读取docker-compose-couch.yaml
启动脚本为scripts/script.sh
在script.sh脚本中读取了utils.sh脚本的内容。

系列目录

Hyperledger Fabric 1.2系列：1. 环境准备

Hyperledger Fabric 1.2系列：2.下载二进制文件、Docker 镜像及解析官方提供的下载脚本

Hyperledger Fabric 1.2系列：3.启动first-network网络，解析byfn.sh启动脚本

Hyperledger Fabric 1.2系列：3.启动first-network网络，解析byfn.sh启动脚本

简介

启动网络

脚本解析

脚本的执行内容讲解

函数内容讲解

askProceed

checkPrereqs

networkUp

upgradeNetwork

networkDown

replacePrivateKey

generateCerts

generateChannelArtifacts

涉及的文件

系列目录

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