nebula graph 集群安装并使用go client测试

阳光穿透心脏的1/2处 2022-09-01 08:44 183阅读 0赞

**目录**

nebula安装

go环境搭建

安装Go语言代码检查和高亮插件vim-go

--------------------

# nebula安装 #

最小集群安装

1、下载nebula graph(多线程下载)  
yum install axel

axel -a -n 10 https://oss-cdn.nebula-graph.com.cn/package/2.0.1/nebula-graph-2.0.1.el7.x86\_64.rpm

cp \*~

cd /data/mlamp/workspace/nebulagraph  
安装  
rpm -ivh nebula-graph-2.0.1.el7.x86\_64.rpm

2、修改三个配置文件（三台服务器）nebula-metad.conf、nebula-graphd.conf、nebula-storaged.conf

vim /usr/local/nebula/etc/nebula-metad.conf  
\--local\_conf=true  
\--meta\_server\_addrs=172.19.208.25:9559,172.19.208.20:9559,172.19.208.42:9559  
\--local\_ip=172.19.208.25（本机ip）  
\--ws\_ip=172.19.208.25（本机ip）

vim /usr/local/nebula/etc/nebula-graphd.conf  
\--local\_conf=true  
\--meta\_server\_addrs=172.19.208.25:9559,172.19.208.20:9559,172.19.208.42:9559  
\--local\_ip=172.19.208.25（本机ip）  
\--ws\_ip=172.19.208.25（本机ip）

vim /usr/local/nebula/etc/nebula-storaged.conf  
\--local\_conf=true  
\--meta\_server\_addrs=172.19.208.25:9559,172.19.208.20:9559,172.19.208.42:9559  
\--local\_ip=172.19.208.25（本机ip）  
\--ws\_ip=172.19.208.25（本机ip）

3、启动(三台服务器)  
/usr/local/nebula/scripts/nebula.service start all

4、下载 nebula-console

wget  https://github.com/vesoft-inc/nebula-console/releases/download/v2.0.1/nebula-console-linux-amd64-v2.0.1  
mv nebula-console-linux-amd64-v2.0.1 nebula-console  
chmod 111 nebula-console

\#\#\# 9996  graphd is 9669  
./nebula-console --addr=172.19.208.25   --port=9669 -u user -p password  
show hosts  
show spaces  
验证

5、下载  studio  
axel -a -n 10 https://oss-cdn.nebula-graph.com.cn/nebula-graph-studio/nebula-graph-studio-2.2.1-7.x86\_64.rpm  
安装  
rpm -i nebula-graph-studio-2.2.1-7.x86\_64.rpm

安装 nodejs  
版本不匹配，卸载npm  
npm uninstall npm -g  
版本不匹配，卸载nodejs  
yum remove nodejs npm -y  
安装nodejs  
下载nodejs(/usr/local)  
wget https://nodejs.org/dist/v14.16.0/node-v14.16.0-linux-x64.tar.xz  
mv node-v14.16.0-linux-x64 nodejs   
软连  
ln -s /usr/local/nodejs/bin/node /usr/bin/node  
ln -s /usr/local/nodejs/bin/npm /usr/bin/npm  
启动studio  
/usr/local/nebula-graph-studio/scripts  
chmod +x \*  
start.sh  
stop.sh

--------------------

nebula graph studio    
登陆地址   http://x.x.x.x:7180/

三台服务器 数据库  
host   
172.19.208.25:9669  
172.19.208.20:9669  
172.19.208.42:9669  
用户名：user(默认未开启)  
密码：password(默认未开启)

--------------------

# go环境搭建 #

1、下载

wget wget https://golang.google.cn/dl/go1.16.6.linux-amd64.tar.gz

tar -zxvf go1.16.6.linux-amd64.tar.gz

2、配置环境

vim /etc/profile.d/go.sh

PATH=$PATH:/data/mlamp/workspace/go/bin

source /etc/profile.d/go.sh

vim /etc/profile.d/gopath.sh

GOPATH=/data/mlamp/workpace/gopath

source /etc/profile.d/gopath.sh

3、验证go环境

echo $GOPATH

4、配置 nebula模块

直接go get github.com/vesoft-inc/nebula-go/v2  报错

设置代理

go env -w GOPROXY=https://goproxy.cn

go env -w GO111MODULE=auto

go get github.com/vesoft-inc/nebula-go/v2

生成mod文件

go mod init nebula.go

编译

go bulid nebula.go

5、运行

go run nebula.go

附go连接nebula代码（官方）

package main
    
    import (
    	"fmt"
    
    	nebula "github.com/vesoft-inc/nebula-go/v2"
    )
    
    const (
    	address = "172.19.208.25"
    	// The default port of Nebula Graph 2.x is 9669.
    	// 3699 is only for testing.
    	port     = 9669
    	username = "root"
    	password = "nebula"
    )
    
    // Initialize logger
    var log = nebula.DefaultLogger{}
    
    func main() {
    	hostAddress := nebula.HostAddress{Host: address, Port: port}
    	hostList := []nebula.HostAddress{hostAddress}
    	// Create configs for connection pool using default values
    	testPoolConfig := nebula.GetDefaultConf()
    
    	// Initialize connection pool
    	pool, err := nebula.NewConnectionPool(hostList, testPoolConfig, log)
    	if err != nil {
    		log.Fatal(fmt.Sprintf("Fail to initialize the connection pool, host: %s, port: %d, %s", address, port, err.Error()))
    	}
    	// Close all connections in the pool
    	defer pool.Close()
    
    	// Create session
    	session, err := pool.GetSession(username, password)
    	if err != nil {
    		log.Fatal(fmt.Sprintf("Fail to create a new session from connection pool, username: %s, password: %s, %s",
    			username, password, err.Error()))
    	}
    	// Release session and return connection back to connection pool
    	defer session.Release()
    
    	checkResultSet := func(prefix string, res *nebula.ResultSet) {
    		if !res.IsSucceed() {
    			log.Fatal(fmt.Sprintf("%s, ErrorCode: %v, ErrorMsg: %s", prefix, res.GetErrorCode(), res.GetErrorMsg()))
    		}
    	}
    
    	{
    		// Prepare the query
    		createSchema := "CREATE SPACE IF NOT EXISTS basic_example_space(vid_type=FIXED_STRING(20)); " +
    			"USE basic_example_space;" +
    			"CREATE TAG IF NOT EXISTS person(name string, age int);" +
    			"CREATE EDGE IF NOT EXISTS like(likeness double)"
    
    		// Excute a query
    		resultSet, err := session.Execute(createSchema)
    		if err != nil {
    			fmt.Print(err.Error())
    			return
    		}
    		checkResultSet(createSchema, resultSet)
    	}
    	// Drop space
    	{
    		query := "DROP SPACE IF EXISTS basic_example_space"
    		// Send query
    		resultSet, err := session.Execute(query)
    		if err != nil {
    			fmt.Print(err.Error())
    			return
    		}
    		checkResultSet(query, resultSet)
    	}
    
    	fmt.Print("\n")
    	log.Info("Nebula Go Client Basic Example Finished")
    }

# **安装Go语言代码检查和高亮插件vim-go** #

yum remove vim  
 yum install vim  
 vim -version  
 yum list | grep vim  
 yum install vim-go.x86\_64

参考：

[https://blog.csdn.net/a5276957/article/details/116450121][https_blog.csdn.net_a5276957_article_details_116450121]

[https://blog.csdn.net/jeikerxiao/article/details/106708145][https_blog.csdn.net_jeikerxiao_article_details_106708145]

[https://github.com/vesoft-inc/nebula-console][https_github.com_vesoft-inc_nebula-console]

[https://blog.csdn.net/jypfhx/article/details/100008569][https_blog.csdn.net_jypfhx_article_details_100008569]

nebula-console

[https://github.com/vesoft-inc/nebula-console][https_github.com_vesoft-inc_nebula-console]

[https://github.com/vesoft-inc/nebula-go][https_github.com_vesoft-inc_nebula-go]

> 互相交流，共同进步

[https_blog.csdn.net_a5276957_article_details_116450121]: https://blog.csdn.net/a5276957/article/details/116450121
[https_blog.csdn.net_jeikerxiao_article_details_106708145]: https://blog.csdn.net/jeikerxiao/article/details/106708145
[https_github.com_vesoft-inc_nebula-console]: https://github.com/vesoft-inc/nebula-console
[https_blog.csdn.net_jypfhx_article_details_100008569]: https://blog.csdn.net/jypfhx/article/details/100008569
[https_github.com_vesoft-inc_nebula-go]: https://github.com/vesoft-inc/nebula-go