最近區塊鏈，火得不行，身邊也有朋友準備玩這個，說是搭了一個星期，沒有把環境搭建起來，叫我幫忙看看環境怎麽搭建

於是我找到了官方的地址 https://github.com/ethereum/go-ethereum

發現官方是支持docker 的

於是我創建了如下目錄

?  block-chain pwd
/Users/jackluo/Works/block-chain
?  block-chain ls
ethereum          start-ethereum.sh

start-ethereum.sh的內容如下

docker stop ethereum-node
docker 
 
rm ethereum-node

docker run -d --name ethereum-node -v /Users/jackluo/Works/block-chain/ethereum:/root            -p 8545:8545 -p 30303:30303            ethereum/client-go
docker exec -it ethereum-node /bin/sh

我們把當前的 ethereum目錄，掛到了docker 的/root下

我們接下來創建私有鏈

? block-chain cd ethereum
? ethereum ls
genesis.json privatechain

我們根據官方的文檔 創建 genesis.json文件裏面寫入

{
  "config": {
        "chainId": 0,
        "homesteadBlock": 0,
        "eip155Block": 0,
        "eip158Block": 0
    },
  "alloc"      : {},
  "coinbase"   : "0x0000000000000000000000000000000000000000",
  "difficulty" : "0x20000",
  "extraData"  : "",
  "gasLimit"   : "0x2fefd8",
  "nonce"      : "0x0000000000000042",
  
 
"mixhash"    : "0x0000000000000000000000000000000000000000000000000000000000000000",
  "parentHash" : "0x0000000000000000000000000000000000000000000000000000000000000000",
  "timestamp"  : "0x00"
}

參數的話，具體看文件檔

接下來，我們啟動以太坊的docker 容器

?  block-chain ./start-ethereum.sh
Error response from daemon: No such container: ethereum-node
Error response from daemon: No such container: ethereum-node
d421da09e63900d1cc9481529ab2a5868515fb821520b548f10e0bd2f3608c0c
/ #
/ #
/ # ls
bin    dev    etc    home   lib    media  mnt    proc   root   run    sbin   srv    sys    tmp    usr    var
/ # cd /root/
~ # ls
genesis.json  privatechain
~ # cd privatechain/
~/privatechain # ls
data0         genesis.json
~/privatechain # pwd
/root/privatechain
~/privatechain #

接下來初始化他

~/privatechain # geth --datadir data0 init genesis.json
INFO [03-06|05:21:40] Maximum peer count                       ETH=25 LES=0 total=25
INFO [03-06|05:21:40] Allocated cache and file handles         database=/root/privatechain/data0/geth/chaindata cache=16 handles=16
INFO [03-06|05:21:40] Persisted trie from memory database      nodes=0 size=0.00B time=41.5µs gcnodes=0 gcsize=0.00B gctime=0s livenodes=1 livesize=0.00B
INFO [03-06|05:21:40] Successfully wrote genesis state         database=chaindata                               hash=ed1fb6…1760ca
INFO [03-06|05:21:40] Allocated cache and file handles         database=/root/privatechain/data0/geth/lightchaindata cache=16 handles=16
INFO [03-06|05:21:40] Persisted trie from memory database      nodes=0 size=0.00B time=10.5µs gcnodes=0 gcsize=0.00B gctime=0s livenodes=1 livesize=0.00B
INFO [03-06|05:21:40] Successfully wrote genesis state         database=lightchaindata                               hash=ed1fb6…1760ca

接下來，啟動私有鏈

~/privatechain # geth --identity "TestNode" --rpc --rpcport "8545" --datadir data0 --port "3033" --nodiscover console
INFO [03-06|05:26:44] Maximum peer count                       ETH=25 LES=0 total=25
INFO [03-06|05:26:44] Starting peer-to-peer node               instance=Geth/TestNode/v1.8.2-unstable-0b814d32/linux-amd64/go1.9.4
INFO [03-06|05:26:44] Allocated cache and file handles         database=/root/privatechain/data0/geth/chaindata cache=768 handles=1024
INFO [03-06|05:26:44] Initialised chain configuration          config="{ChainID: 1024 Homestead: 0 DAO: <nil> DAOSupport: false EIP150: <nil> EIP155: 0 EIP158: 0 Byzantium: <nil> Constantinople: <nil> Engine: unknown}"
INFO [03-06|05:26:44] Disk storage enabled for ethash caches   dir=/root/privatechain/data0/geth/ethash count=3
INFO [03-06|05:26:44] Disk storage enabled for ethash DAGs     dir=/root/.ethash                        count=2
INFO [03-06|05:26:44] Initialising Ethereum protocol           versions="[63 62]" network=1
INFO [03-06|05:26:44] Loaded most recent local header          number=0 hash=ed1fb6…1760ca td=1024
INFO [03-06|05:26:44] Loaded most recent local full block      number=0 hash=ed1fb6…1760ca td=1024
INFO [03-06|05:26:44] Loaded most recent local fast block      number=0 hash=ed1fb6…1760ca td=1024
INFO [03-06|05:26:44] Loaded local transaction journal         transactions=0 dropped=0
INFO [03-06|05:26:44] Regenerated local transaction journal    transactions=0 accounts=0
INFO [03-06|05:26:44] Starting P2P networking
INFO [03-06|05:26:44] RLPx listener up                         self="enode://3264cbba213bc88c407c55576f148d5c2b6afa5013a7c204085e01c5e4dc24a9235bd9abf86681d0d36349fa8031367c31adb534a469f4ea1e156047bf96befb@[::]:3033?discport=0"
INFO [03-06|05:26:44] IPC endpoint opened                      url=/root/privatechain/data0/geth.ipc
INFO [03-06|05:26:44] HTTP endpoint opened                     url=http://127.0.0.1:8545             cors= vhosts=localhost
Welcome to the Geth JavaScript console!

instance: Geth/TestNode/v1.8.2-unstable-0b814d32/linux-amd64/go1.9.4
INFO [03-06|05:26:44] Etherbase automatically configured       address=0xFc2D11A7A4408b77d95202c0A455cfd44F2A4cFD
coinbase: 0xfc2d11a7a4408b77d95202c0a455cfd44f2a4cfd
at block: 0 (Thu, 01 Jan 1970 00:00:00 UTC)
 datadir: /root/privatechain/data0
 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

基本上已經啟起來了

其它，參考了下 https://g2ex.github.io/2017/09/12/ethereum-guidance/ 這個

docker 搭建以太坊私有鏈搭建