Centos7搭建Geth节点区块链

文章目录

环境准备

服务器

Go Ethereum下载安装

时间同步（时间错误导致无法同步节点)

同步网络时间
定时同步网络时间

配置Geth

配置启动
选项说明
参数参见

基本指令

登录控制台
创建账户
查看账户余额
其他指令

查看日志

查看同步日志
同步结束

环境准备服务器一般要求服务器：4核-8G-500G

[root@localhost opt]# cat /etc/redhat-release CentOS Linux release 7.5.1804 (Core)

Go Ethereum下载安装
下载地址：https://geth.ethereum.org/downloads/
选择需要下载的客户端：geth-linux-amd64-1.8.27-4bcc0a37.tar.gz

#下载 [root@localhost opt]# ll | grep geth-linux-amd64-1.8.27-4bcc0a37.tar.gz -rw-r--r--. 1 root root 14594041 Apr 17 21:18 geth-linux-amd64-1.8.27-4bcc0a37.tar.gz

# 解压安装 [root@localhost opt]# tar zxvf geth-linux-amd64-1.8.27-4bcc0a37.tar.gz [root@localhost opt]# cd geth-linux-amd64-1.8.27-4bcc0a37 [root@localhost opt]# cp geth /usr/bin/geth

时间同步（时间错误导致无法同步节点) 同步网络时间

[root@localhost opt]# ntpdate cn.pool.ntp.org 16 Jul 09:59:56 ntpdate[28004]: step time server 119.28.183.184 offset 0.975532 sec

定时同步网络时间

[root@localhost opt]# echo '0 0 * * * root ntpdate cn.pool.ntp.org prefer' >> /etc/crontab [root@localhost opt]# service crond restart Redirecting to /bin/systemctl restart crond.service

配置Geth 配置启动

# 创建目录 [root@localhost opt]# mkdir ethdir

# 生成配置文件 [root@localhost opt]# geth --syncmode 'fast' --rpc --rpcaddr '0.0.0.0' --rpcport 8545 --datadir /opt/ethdir/data --port '30303' --rpcapi 'db,eth,net,web3,personal' --rpccorsdomain '*' --networkid 4 --cache 1024 dumpconfig > /opt/ethdir/config.toml

# 后台启动geth节点 [root@localhost opt]# nohup geth --config /opt/ethdir/config.toml >> /opt/ethdir/geth.log2>&1&

选项说明

选项	使用值	说明
–syncmode	“fast”	Blockchain sync mode (“fast”, “full”, or “light”)，同步模式，一般使用fast即可
–rpc		Enable the HTTP-RPC server
–rpcaddr	‘0.0.0.0’	HTTP-RPC server listening interface (default: “localhost”)
–rpcport	8545	HTTP-RPC server listening port (default: 8545)
–datadir	/opt/ethdir/data	Data directory for the databases and keystore
–port	‘30303’	Network listening port (default: 30303)
–rpcapi	‘db,eth,net,web3,personal’	API’s offered over the HTTP-RPC interface
–rpccorsdomain	‘*’	Comma separated list of domains from which to accept cross origin requests (browser enforced)
–networkid	4	Network identifier (integer, 1=Frontier(主网), 2=Morden (disused), 3=Ropsten, 4=Rinkeby) (default: 1)
–cache	1024	Megabytes of memory allocated to internal caching (default: 1024)

参数参见 https://www.cnblogs.com/tinyxiong/p/7918706.html
https://geth.ethereum.org/interface/Command-Line-Options
基本指令登录控制台

[root@localhost rinkeby]# geth attach geth.ipc Welcome to the Geth JavaScript console! instance: Geth/v1.8.27-stable-4bcc0a37/linux-amd64/go1.11.9 coinbase: 0x08d589b4d5921b128cda9aad4ce82570186b5491 at block: 4741795 (Tue, 16 Jul 2019 13:59:26 CST) datadir: /root/.ethereum/rinkeby modules: admin:1.0 clique: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 >

创建账户

> personal.newAccount('password') "0xf15f87cf98c847af5b1de0bb106854b6e40f6276" >

查看账户余额

> eth.getBalance('0xf15f87cf98c847af5b1de0bb106854b6e40f6276') 0 >

其他指令参见：https://geth.ethereum.org/interface/Management-APIs
查看日志查看同步日志

[root@localhost opt]# more geth.log INFO [07-03|21:17:49.633] Maximum peer countETH=25 LES=0 total=25 INFO [07-03|21:17:50.170] Starting peer-to-peer nodeinstance=Geth/v1.8.27-stable-4bcc0a3 7/linux-amd64/go1.11.9 INFO [07-03|21:17:50.170] Allocated cache and file handlesdatabase=/root/.ethereum/rinkeby/get h/chaindata cache=512 handles=32768 INFO [07-03|21:17:56.473] Initialised chain configurationconfig="{ChainID: 4 Homestead: 1 DAO : DAOSupport: true EIP150: 2 EIP155: 3 EIP158: 3 Byzantium: 1035301 Constantinople: 3660663Cons tantinopleFix: 4321234 Engine: clique}" INFO [07-03|21:17:56.474] Initialising Ethereum protocolversions="[63 62]" network=4 INFO [07-03|21:17:56.529] Loaded most recent local headernumber=4668667 hash=d18fbe…ab7758 td =8547789 age=1m2s INFO [07-03|21:17:56.529] Loaded most recent local full blocknumber=4668667 hash=d18fbe…ab7758 td =8547789 age=1m2s INFO [07-03|21:17:56.529] Loaded most recent local fast blocknumber=4668667 hash=d18fbe…ab7758 td =8547789 age=1m2s INFO [07-03|21:17:56.529] Loaded local transaction journaltransactions=0 dropped=0 INFO [07-03|21:17:56.530] Regenerated local transaction journaltransactions=0 accounts=0 WARN [07-03|21:17:56.530] Blockchain not empty, fast sync disabled INFO [07-03|21:17:57.490] New local node recordseq=74 id=35056e59ec20edb9 ip=127.0. 0.1 udp=30303 tcp=30303 INFO [07-03|21:17:57.491] Started P2P networkingself=enode://d0e043a85000657cd8febdc 97678b946d5e20bd24bc0e7234962a17390a6abe2dd33eea67ff3df24634bef96807466c138256e7d65190ad9f360b7834f5163 5a@127.0.0.1:30303 INFO [07-03|21:17:57.494] IPC endpoint openedurl=/root/.ethereum/rinkeby/geth.ipc INFO [07-03|21:17:57.495] HTTP endpoint openedurl=http://0.0.0.0:8545 cors=* vhosts=* INFO [07-03|21:18:01.493] New local node recordseq=75 id=35056e59ec20edb9 ip= udp=30303 tcp=30303 INFO [07-03|21:21:57.492] Block synchronisation started WARN [07-03|21:22:04.382] Synchronisation failed, dropping peerpeer=d803dcc3febec864 err="no peers available or all tried for download" INFO [07-03|21:27:47.508] Imported new chain segmentblocks=2 txs=17 mgas=2.315 elapsed=5 41.329ms mgasps=4.276 number=4668669 hash=17d9b1…1baa1c age=10m23s cache=229.03kB INFO [07-03|21:27:49.054] Imported new chain segmentblocks=9 txs=184 mgas=21.486 elapsed =1.544smgasps=13.910 number=4668678 hash=c9d65b…f0e2d2 age=8m10scache=1.55mB INFO [07-03|21:27:59.959] Imported new chain segmentblocks=28 txs=496 mgas=52.850 elapse d=10.901smgasps=4.848number=4668706 hash=677f7f…86d5aa age=1m20scache=6.19mB INFO [07-03|21:28:00.411] Imported new chain segmentblocks=4txs=74mgas=8.266elapse d=451.917ms mgasps=18.290 number=4668710 hash=d10922…2ff143 cache=6.69mB

当出现Block synchronisation started字样时，开始同步节点，一般第一次要同步1-2天（fast模式）。
同步结束