Styjun

i'm using fabric sample project 'basic network' as implementary enviroment, to develop chaincode and nodejs client app(REST API) base on fabric node client sdk, the node app resident in same host with fabric peer.
while all the docker container(ca,orderer,peer,couchdb,client) in one host, i've succeed in creating and joining channel, installing and instantiating chaincode, so with nodejs client, the query and invoke function performed succeessfully. the connection.json file are copy from basic network sample.
when i've moved the orderer container to another host, modified the container docker-compose yaml file, and the connection.json, the operation result in client container doesn't changed, they are all OK, the nodejs client app query oepration can proceed but the invoke(insert and modify) failed,the log is:

2019-03-23T03:32:38.769Z - debug: [Remote.js]: getUrl::grpc://192.168.122.6:7050
2019-03-23T03:32:38.769Z - error: [Remote.js]: Error: Failed to connect before the deadline URL:grpc://192.168.122.6:7050
2019-03-23T03:32:38.770Z - error: [Remote.js]: Error: Failed to connect before the deadline URL:grpc://192.168.122.6:7050
2019-03-23T03:32:38.772Z - debug: [Remote.js]: getUrl::grpc://192.168.122.6:7050
2019-03-23T03:32:38.772Z - error: [Orderer.js]: Orderer grpc://192.168.122.6:7050 has an error Error: Failed to connect before the deadline URL:grpc://192.168.122.6:7050 
2019-03-23T03:32:38.772Z - error: [Orderer.js]: Orderer grpc://192.168.122.6:7050 has an error Error: Failed to connect before the deadline URL:grpc://192.168.122.6:7050 

here,the '192.168.122.6' is the host which the orderer container resident in. below is the connection.json file used by nodejs app, i've turned off the tls between orderer and peer:

"name": "basic-network",
"version": "1.0.0",
"client": 
 "organization": "Org1",
 "connection": 
 "timeout": 
 "peer": 
 "endorser": "300"
 ,
 "orderer": "300"
 
 
,
"channels": 
 "mychannel": 
 "orderers": [
 "orderer.example.com"
 ],
 "peers": 
 "peer0.org1.example.com": 
 
 
,
"organizations": 
 "Org1": 
 "mspid": "Org1MSP",
 "peers": [
 "peer0.org1.example.com"
 ],
 "certificateAuthorities": [
 "ca.example.com"
 ]
 
,
"orderers": 
 "orderer.example.com": 
 "url": "grpc://192.168.122.6:7050"
 
,
"peers": 
 "peer0.org1.example.com": 
 "url": "grpc://127.0.0.1:7051"
 
,
"certificateAuthorities": 
 "ca.example.com": 
 "url": "http://127.0.0.1:7054",
 "caName": "ca.example.com"
 

i guess,there is something wrong in connection.json,but i don't know which is.
below is the content about orderer and peer in docker-compose.yaml:

 orderer.example.com:
container_name: orderer.example.com
image: hyperledger/fabric-orderer
environment:
 - CORE_VM_DOCKER_HOSTCONFIG_NETWORKMODE=net_basic
 - ORDERER_GENERAL_LOGLEVEL=info
 - FABRIC_LOGGING_SPEC=info
 - ORDERER_GENERAL_LISTENADDRESS=0.0.0.0
 - ORDERER_GENERAL_GENESISMETHOD=file
 - ORDERER_GENERAL_GENESISFILE=/etc/hyperledger/configtx/genesis.block
 - ORDERER_GENERAL_LOCALMSPID=OrdererMSP
 - ORDERER_GENERAL_LOCALMSPDIR=/etc/hyperledger/msp/orderer/msp
 - ORDERER_GENERAL_TLS_ENABLED=false
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_LEDGER_STATE_STATEDATABASE=CouchDB
 - CORE_LEDGER_STATE_COUCHDBCONFIG_COUCHDBADDRESS=couchdb:5984
 - CORE_PEER_NETWORKID=basic
 - CORE_PEER_ID=peer0.org1.example.com
 - CORE_PEER_ADDRESS=peer0.org1.example.com:7051
 - CORE_PEER_CHAINCODEADDRESS=peer0.org1.example.com:7052
 - CORE_PEER_CHAINCODELISTENADDRESS=0.0.0.0:7052
 - CORE_PEER_GOSSIP_BOOTSTRAP=peer0.org1.zte.com:7051
 - CORE_PEER_GOSSIP_EXTERNALENDPOINT=peer0.org1.zte.com:7051
 - CORE_PEER_LOCALMSPID=Org1MSP
 - CORE_VM_ENDPOINT=unix:///host/var/run/docker.sock
 # 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=net_basic
 - FABRIC_LOGGING_SPEC=debug
 - CORE_CHAINCODE_LOGGING_LEVEL=debug
 - CORE_PEER_MSPCONFIGPATH=/etc/hyperledger/msp/peer/
 # 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=
 - CORE_PEER_TLS_ENABLED=false
 - CORE_PEER_GOSSIP_SKIPHANDSHAKE=true
 - CORE_PEER_GOSSIP_USELEADERELECTION=true
 - CORE_PEER_GOSSIP_ORGLEADER=false
 - CORE_PEER_PROFILE_ENABLED=false
 working_dir: /opt/gopath/src/github.com/hyperledger/fabric
 command: peer node start
 # command: peer node start --peer-chaincodedev=true
 ports:
 - 7051:7051
 - 7052:7052
 - 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
 extra_hosts:
 - "orderer.example.com:192.168.122.6"
 - "peer0.org1.example.com:127.0.0.1"