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Creating And Adding Hyperledger Peers to Channels

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Create and join a peer to a channel

Prerequisites

In this example, we will assume the new channel will be named MyChannel

Generate a channel genesis block

Gather public keys into an MSP for genesis block creation and create configtx.yaml 

This adds the PeerAdmin to the new channel as an ADMIN by putting its public key into msp/admincerts

In these examples, we assume the PeerOrg admin has been enrolled and its MSP is in PeerAdmin/msp 
cp config.env-example config.env

Use a text editor to make changes to the new config.env file. You will need to add your <NetworkID> to the config, as well as all the peer(s) <NodeID> separated by spaces, you can get this information from your Fabric Network Connect Tab

Create configtx.yaml

make configtx.yaml 

Gather public keys into an MSP for genesis block creation

This adds the PeerAdmin to the new channel as an ADMIN by putting its public key into msp/admincerts

mkdir -p mychannel/msp/cacerts/ mychannel/msp/admincerts/
cp -f PeerAdmin/msp/cacerts/*.pem mychannel/msp/cacerts/
cp -f PeerAdmin/msp/signcerts/cert.pem mychannel/msp/admincerts/

Generate genesis block and anchor peer update

mkdir -p artifacts/
configtxgen -configPath $PWD -profile SingleMSPChannel -outputCreateChannelTx artifacts/mychannel.txn -channelID mychannel
configtxgen -configPath $PWD -profile SingleMSPChannel -outputAnchorPeersUpdate artifacts/mychannel-anchor-peers.txn -channelID mychannel -asOrg PeerOrg

Make the PeerAdmin an admin of the local peer instances we will be running

mkdir -p PeerAdmin/msp/admincerts
cp -f PeerAdmin/msp/signcerts/* PeerAdmin/msp/admincerts

Create/update/join channel

Note that fetch/join has to be done for every <NodeID> peer you wish to join to a channel, as specified in the config.env ANCHOR_PEERS setting for the configtx.yaml created above. 

. config.env

export FABRIC_CFG_PATH=$PWD
export CORE_PEER_MSPCONFIGPATH="PeerAdmin/msp"
export CORE_PEER_LOCALMSPID="${NETWORK_ID}-peerOrg"
export CORE_PEER_TLS_ENABLED=true
export CORE_PEER_TLS_ROOTCERT_FILE="${PWD}/tlsca-${NETWORK_ID}.pem"

export CORE_PEER_ADDRESS="peer-${ANCHOR_PEERS[0]}.${NETWORK_ID}.bdnodes.net:7051"
peer channel create -c mychannel -f ./artifacts/mychannel.txn --tls -o orderer.${NETWORK_ID}.bdnodes.net:7050 --cafile=${CORE_PEER_TLS_ROOTCERT_FILE}
peer channel update -c mychannel -f ./artifacts/mychannel-anchor-peers.txn --tls -o orderer.${NETWORK_ID}.bdnodes.net:7050 --cafile=${CORE_PEER_TLS_ROOTCERT_FILE}

for NODE_ID in "${ANCHOR_PEERS[@]}"; do
    export CORE_PEER_ADDRESS="peer-${NODE_ID}.${NETWORK_ID}${ENV}.bdnodes.net:7051"
    echo "Joining peer-${NODE_ID} to $CHANNEL"
    peer channel join -b ./mychannel.block
done

 

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