以太坊私网建立 (2)

接下来我们将在我们的私有网络连接两个节点。

先思考两个问题

• 决定存储区块链数据的目录
• 选择网络id，默认1为主网

为了在同一台机器能够运行两个节点，我们需要为不同的节点设置不同的port和rpcport。

开始编码

liyuechun:Desktop yuechunli$ cd 1015/
liyuechun:1015 yuechunli$ mkdir test
liyuechun:1015 yuechunli$ cd test/
liyuechun:test yuechunli$ 

查看你的ip地址

liyuechun:~ yuechunli$ ifconfig|grep netmask|awk '{print $2}' 
127.0.0.1
192.168.1.5
10.20.0.8

打开节点

liyuechun:test yuechunli$ geth --networkid 123 --datadir data1 --rpc --rpcaddr 192.168.1.5 --rpcport 8989 --port 3000 console
WARN [10-15|08:20:18] No etherbase set and no accounts found as default 
INFO [10-15|08:20:18] Starting peer-to-peer node               instance=Geth/v1.7.1-stable-05101641/darwin-amd64/go1.9.1
INFO [10-15|08:20:18] Allocated cache and file handles         database=/Users/liyuechun/Desktop/1015/test/hi/geth/chaindata cache=128 handles=1024
INFO [10-15|08:20:18] Writing default main-net genesis block 
INFO [10-15|08:20:18] Initialised chain configuration          config="{ChainID: 1 Homestead: 1150000 DAO: 1920000 DAOSupport: true EIP150: 2463000 EIP155: 2675000 EIP158: 2675000 Byzantium: 4370000 Engine: ethash}"
INFO [10-15|08:20:18] Disk storage enabled for ethash caches   dir=/Users/liyuechun/Desktop/1015/test/hi/geth/ethash count=3
INFO [10-15|08:20:18] Disk storage enabled for ethash DAGs     dir=/Users/liyuechun/.ethash                          count=2
INFO [10-15|08:20:18] Initialising Ethereum protocol           versions="[63 62]" network=123
INFO [10-15|08:20:18] Loaded most recent local header          number=0 hash=d4e567…cb8fa3 td=17179869184
INFO [10-15|08:20:18] Loaded most recent local full block      number=0 hash=d4e567…cb8fa3 td=17179869184
INFO [10-15|08:20:18] Loaded most recent local fast block      number=0 hash=d4e567…cb8fa3 td=17179869184
INFO [10-15|08:20:18] Regenerated local transaction journal    transactions=0 accounts=0
INFO [10-15|08:20:18] Starting P2P networking 
INFO [10-15|08:20:20] UDP listener up                          self=enode://032ff589bae471ab0884cce696a632fcb44ec9b7c33dfa5c06e547de099ed116360e74172c0398396588e6a374bf0dd7da1558e0a4899e9670d2ce7a1967cf11@[::]:3000
INFO [10-15|08:20:20] RLPx listener up                         self=enode://032ff589bae471ab0884cce696a632fcb44ec9b7c33dfa5c06e547de099ed116360e74172c0398396588e6a374bf0dd7da1558e0a4899e9670d2ce7a1967cf11@[::]:3000
INFO [10-15|08:20:20] IPC endpoint opened: /Users/liyuechun/Desktop/1015/test/hi/geth.ipc 
INFO [10-15|08:20:20] HTTP endpoint opened: http://192.168.1.4:8545 
Welcome to the Geth JavaScript console!

instance: Geth/v1.7.1-stable-05101641/darwin-amd64/go1.9.1
 modules: admin:1.0 debug:1.0 eth:1.0 miner:1.0 net:1.0 personal:1.0 rpc:1.0 txpool:1.0 web3:1.0

> 

多节点连接

Enode url其实就是和另外一个节点互动的唯一的id。

节点A

> admin.nodeInfo.enode 
"enode://032ff589bae471ab0884cce696a632fcb44ec9b7c33dfa5c06e547de099ed116360e74172c0398396588e6a374bf0dd7da1558e0a4899e9670d2ce7a1967cf11@[::]:3000"
> 

[::]等价于192.168.1.5，3000是端口号。

节点B

如果是同一台电脑，需要设置不同的rcpport和不同的port。如果是不同的电脑，直接重复上面节点A的步骤即可。

> admin.addPeer("enode://032ff589bae471ab0884cce696a632fcb44ec9b7c33dfa5c06e547de099ed116360e74172c0398396588e6a374bf0dd7da1558e0a4899e9670d2ce7a1967cf11@[::]:3000")
> true

查看节点

> admin.peers 

查看连接节点数

> web3.net.peerCount
1
>