【区块链学习】（3）以太坊私链多节点搭建

１、首先搭建私链单节点

教程：区块链学习】（2）以太坊私链搭建

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２、多节点

复制１份之前节点的创世块文件genesis.json，内容必须和第１个节点的相同

初始化创世块，datadir　数据目录不要和第１个节点重复

geth --datadir data1 init genesis.json

启动节点，这里注意networkid要和之前节点相同，但是port不能重复，如果开启远程rpcport端口的话也不能重复

geth --identity node2 --datadir data1 --networkid 1 --rpcport 8546 --port 30304 console

查看节点ID

> admin.nodeInfo.enode
"enode://b82a94949537230fdb89b718d38bd2e2522228a219cb96ce768a6c0ba120d3546423350777d25d1607ed286cffe927f72632ae387451291ac96c0a2a072f9c5a@[::]:30304"

用主节点来添加这个节点 注: 将[::]改成IP

> admin.addPeer("enode://b82a94949537230fdb89b718d38bd2e2522228a219cb96ce768a6c0ba120d3546423350777d25d1607ed286cffe927f72632ae387451291ac96c0a2a072f9c5a@127.0.0.1:30304")

查看节点列表

> admin.peers
[{
    caps: ["eth/62", "eth/63"],
    id: "b82a94949537230fdb89b718d38bd2e2522228a219cb96ce768a6c0ba120d3546423350777d25d1607ed286cffe927f72632ae387451291ac96c0a2a072f9c5a",
    name: "Geth/node2/v1.8.12-stable/darwin-amd64/go1.10.3",
    network: {
      inbound: false,
      localAddress: "127.0.0.1:52609",
      remoteAddress: "127.0.0.1:30304",
      static: true,
      trusted: false
    },
    protocols: {
      eth: {
        difficulty: 30817382,
        head: "0x21e8fa1f583ccd027ce28669d3cd21689444dd46d21c647d652a19bf1abff997",
        version: 63
      }
    }
}]

2个节点连接上之后,会进行区块同步

> INFO [08-31|13:57:40.561] Block synchronisation started
INFO [08-31|13:57:40.637] Imported new chain segment               blocks=74 txs=0 mgas=0.000 elapsed=66.851ms  mgasps=0.000 number=223 hash=21e8fa…bff997 cache=23.40kB ignored=2

到这个已经2个节点已经搭建成功了.