fabric中channel的建立与加入

fabric

0.操作前准备

0.1　安装 Fabric SDK

$ git clone https://github.com/hyperledger/fabric-sdk-py.git
$ cd fabric-sdk-py
$ make install

安装后可以检测sdk版本

$ python
>>> import hfc
>>> print(hfc.VERSION)
0.7.0

0.2.开启一个 Fabric Network

使用以下命令开启一个Fabric Network

$ docker pull hyperledger/fabric-peer:1.3.0
$ docker pull hyperledger/fabric-orderer:1.3.0
$ docker pull hyperledger/fabric-ca:1.3.0
$ docker pull hyperledger/fabric-ccenv:1.3.0
$ docker-compose -f test/fixtures/docker-compose-2orgs-4peers-tls.yaml up

然后你将有一个有3个组织的Fabric网络，网络拓扑结构如下：
* org1.example.com
* peer0.org1.example.com
* peer1.org1.example.com
* org2.example.com
* peer0.org2.example.com
* peer1.org2.example.com
* orderer.example.com
* orderer.example.com

*注意： configtxgen需要在PATH路径下

0.3. 建立连接配置文件

一个网络连接配置文件通过提供跟网络交互所需要的所有信息帮助SDK连接到Fabric网络中，其中包括：
* peer, orderer, ca的服务端点
* 客户端身份的认证证书
一个例子是 network.json

1. 在Fabric网络中Channel的操作

Use sdk to create a new channel and let peers joinit.
使用sdk建立新的Channel并让peers

from hfc.fabric import Client
cli = Client(net_profile="test/fixtures/network.json")
org1_admin = cli.get_user(org_name='org1.example.com', name='Admin')
# Create a New Channel, the response should be true if succeed
response = cli.channel_create(
            orderer_name='orderer.example.com',
            channel_name='businesschannel',
            requestor=org1_admin,
            config_yaml='test/fixtures/e2e_cli/',
            channel_profile='TwoOrgsChannel'
            )
print(response==True)
# Join Peers into Channel, the response should be true if succeed
response = cli.channel_join(
               requestor=org1_admin,
               channel_name='businesschannel',
               peer_names=['peer0.org1.example.com',
                           'peer1.org1.example.com']
               orderer_name='orderer.example.com'
               )
print(response==True)
# Join Peers from a different MSP into Channel
org2_admin = cli.get_user(org_name='org2.example.com', name='Admin')
# For operations on peers from org2.example.com, org2_admin is required as requestor
response = cli.channel_join(
               requestor=org2_admin,
               channel_name='businesschannel',
               peer_names=['peer0.org2.example.com',
                           'peer1.org2.example.com']
               orderer_name='orderer.example.com'
               )
print(response==True)

1.1 操作示范

1. 将configtxgen加入到PATH路径下
   
2. 开启fabric客户端，确认客户端里没有Channel
   
3. 进行建立Channel操作
   
   再次查看客户端Channel，发现新的Channel已经建立