How to upgrade a chaincode after modification?

Question

I am new to hyperledger and is going through the example here . I am tried to play around the chaincode but is now stuck at the part where I am suppose to upgrade the chaincode

I have tried to execute the peer chaincode upgrade within the docker peer node:

peer chaincode upgrade -n tuna-app -p github.com/tuna-app

but end up with the error

 Error getting (testchainid) orderer endpoint: Error endorsing GetConfigBlock: rpc error: code = Unknown desc = chaincode error (status: 500, message: "GetConfigBlock" request failed authorization check for channel [testchainid]: [Failed to get policy manager for channel [testchainid]])

Answer 1

You need to specify the channel name for which you'd like to upgrade the chaincode, also need to specify args and new version. Moreover you have to specify the ordering service endpoints so peer cli will be able to submit the upgrade transaction:

peer chaincode upgrade -n tuna-app -v 2.0 \
               -c '{"Args":[""]}' \
               -p github.com/tuna-app -C mychannel \
               -o orderer:7051

You can find more here.