byfn网络启动后启动了两个组织，每个组织内包含2个peer，然后使用eyfn脚本启动org3，这样就变成了3个组织，每个组织下两个peer，结构图如下：
在此基础上，如果org1和org2有新的业务往来，而又不想让org3加入的话，就需要新建一个channel
命名为mynewchannel，连接着peer0.org1和peer0.org2
结构图如下：
下面开始
进入cli容器
docker exec -it cli bash
新建一个文件夹用于存放配置文件
mkdir newChannel
cd newChannel/
另起一个终端，把configtx.yaml拷贝到cli容器中
docker cp configtx.yaml cli:/opt/gopath/src/github.com/hyperledger/fabric/peer/newChannel
回到容器内，生成创世块文件
configtxgen -profile TwoOrgsOrdererGenesis -channelID byfn-sys-channel -outputBlock newgenesis.block
设置新的channel名字
export CHANNEL_NAME=mynewchannel
生成channel文件
configtxgen -profile TwoOrgsChannel -outputCreateChannelTx ./channel.tx -channelID $CHANNEL_NAME
定义两个组织的锚节点
configtxgen -profile TwoOrgsChannel -outputAnchorPeersUpdate Org1MSPanchors.tx -channelID $CHANNEL_NAME -asOrg Org1MSP
configtxgen -profile TwoOrgsChannel -outputAnchorPeersUpdate Org2MSPanchors.tx -channelID $CHANNEL_NAME -asOrg Org2MSP
切换到org1的admin用户，默认就是
CORE_PEER_MSPCONFIGPATH=/opt/gopath/src/github.com/hyperledger/fabric/peer/crypto/peerOrganizations/org1.example.com/users/Admin@org1.example.com/msp
CORE_PEER_ADDRESS=peer0.org1.example.com:7051
CORE_PEER_LOCALMSPID="Org1MSP"
CORE_PEER_TLS_ROOTCERT_FILE=/opt/gopath/src/github.com/hyperledger/fabric/peer/crypto/peerOrganizations/org1.example.com/peers/peer0.org1.example.com/tls/ca.crt
回到第二个终端，把core.yaml文件拷贝到cli容器中，要先从peer容器拷出来：
docker cp peer0.org1.example.com:/etc/hyperledger/fabric/core.yaml .
docker cp core.yaml cli:/opt/gopath/src/github.com/hyperledger/fabric/peer/newChannel
rm -rf core.yaml
回到cli容器，创建通道
peer channel create -o orderer.example.com:7050 -c $CHANNEL_NAME -f channel.tx --tls --cafile /opt/gopath/src/github.com/hyperledger/fabric/peer/crypto/ordererOrganizations/example.com/orderers/orderer.example.com/msp/tlscacerts/tlsca.example.com-cert.pem
org1的peer0加入通道
peer channel join -b mynewchannel.block
切换到peer0.org2
CORE_PEER_MSPCONFIGPATH=/opt/gopath/src/github.com/hyperledger/fabric/peer/crypto/peerOrganizations/org2.example.com/users/Admin@org2.example.com/msp
CORE_PEER_ADDRESS=peer0.org2.example.com:9051
CORE_PEER_LOCALMSPID="Org2MSP"
CORE_PEER_TLS_ROOTCERT_FILE=/opt/gopath/src/github.com/hyperledger/fabric/peer/crypto/peerOrganizations/org2.example.com/peers/peer0.org2.example.com/tls/ca.crt
加入通道
加入通道
peer channel join -b mynewchannel.block
更新org2锚节点
peer channel update -o orderer.example.com:7050 -c $CHANNEL_NAME -f Org2MSPanchors.tx --tls --cafile /opt/gopath/src/github.com/hyperledger/fabric/peer/crypto/ordererOrganizations/example.com/orderers/orderer.example.com/msp/tlscacerts/tlsca.example.com-cert.pem
切换到org1更新锚节点
CORE_PEER_MSPCONFIGPATH=/opt/gopath/src/github.com/hyperledger/fabric/peer/crypto/peerOrganizations/org1.example.com/users/Admin@org1.example.com/msp
CORE_PEER_ADDRESS=peer0.org1.example.com:7051
CORE_PEER_LOCALMSPID="Org1MSP"
CORE_PEER_TLS_ROOTCERT_FILE=/opt/gopath/src/github.com/hyperledger/fabric/peer/crypto/peerOrganizations/org1.example.com/peers/peer0.org1.example.com/tls/ca.crt
peer channel update -o orderer.example.com:7050 -c $CHANNEL_NAME -f Org1MSPanchors.tx --tls --cafile /opt/gopath/src/github.com/hyperledger/fabric/peer/crypto/ordererOrganizations/example.com/orderers/orderer.example.com/msp/tlscacerts/tlsca.example.com-cert.pem
下面就是安装和实例化链码了，不再赘述
切换到不同的peer可以发现，mynewchannel只有在peer0.org1和peer0.org2上面安装
查询channel的命令：
peer channel list
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