Error: failed to create deliver client for orderer: orderer client failed to connect to orderer

环境

操作系统:CentOS 7
Fabric版本: 2.0.1

问题

创建通道时报错(yaml文件已通过extra_hosts方式配置域名解析)

peer channel create -o orderer.example.com:7050 -c $CHANNEL_NAME -f ./channel-artifacts/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

报错:
Error: failed to create deliver client for orderer: orderer client failed to connect to orderer.example.com:7050: failed to create new connection: connection error: desc = “transport: error while dialing: dial tcp 192.168.1.20:7050: connect: no route to host”

解决方案:关闭防火墙

systemctl status firewalld.service          #查看防火墙状态
systemctl stop firewalld.service            #停止firewall
systemctl disable firewalld.service         #禁止firewall开机启动

再次执行创建通道命令即可