在fabric2.2教程步骤14中，智能合约安装时，运行install.sh报错，怎么解决？求大佬帮助！

[Lemonedf]

root@vmware:~/fabric/scripts/fabric-samples/test-network# ls
addOrg3  channel-artifacts  configtx  docker  install.sh  invoketest.sh  log.txt  network.sh  organizations  README.md  scripts  system-genesis-block  trace.tar.gz
root@vmware:~/fabric/scripts/fabric-samples/test-network# ./install.sh
Error: failed to retrieve endorser client for install: endorser client failed to connect to localhost:7051: failed to create new connection: connection error: desc = "transport: error while dialing: dial tcp 127.0.0.1:7051: connect: connection refused"