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Org-remove.md

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Removing an Org from a channel

Use BYFN to spin up a network with 2 orgs consisting of 4 peers and an orderer

Generate network artifacts and bring up the network

./byfn.sh -m generate
./byfn.sh -m up

Spin up the cli container

docker exec -it cli bash

Start configtxlator and set below variables in the cli container

configtxlator start &
CONFIGTXLATOR_URL=http://127.0.0.1:7059
ORDERER_CA=/opt/gopath/src/github.com/hyperledger/fabric/peer/crypto/ordererOrganizations/example.com/orderers/orderer.example.com/msp/tlscacerts/tlsca.example.com-cert.pem
CHANNEL_NAME=mychannel

Fetch the latest config block and write that to config_block.pb

peer channel fetch config config_block.pb -o orderer.example.com:7050 -c $CHANNEL_NAME --tls --cafile $ORDERER_CA

Decode the block to human readable json format

curl -X POST --data-binary @config_block.pb "$CONFIGTXLATOR_URL/protolator/decode/common.Block" | jq . > config_block.json

Isolating current config

jq .data.data[0].payload.data.config config_block.json > config.json

open the config.json file and manually remove Org2 MSP material and write it to updated_config.json file

since the original config file is modified to updated_config.json get the original config file again

jq .data.data[0].payload.data.config config_block.json > config.json

continue the remaining steps of computing update and re-marshall with configtxlator

sign with Org1 and send update to orderer with Org2

now the Org2 is removed from the channel hence it will not be able to make any invokes.

Org2 can still query the ledger since it has the record of the ledger till the time it is removed from the channel and the value will be constant

To completely remove the Org2 we have to remove it from the system channel also

Switch to orderer and fetch the latest config block

peer channel fetch config sys_config_block.pb -o orderer.example.com:7050 -c testchainid --tls --cafile $ORDERER_CA

repeat the above steps of unmarshall remove Org2MSP and remarshall

switch to orderer admin user and update the channel

Org2 is now successfully removed !!..