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A go client for codis based on Redigo.

Go 100.00%

codis redis-client golang

redigo-codis's Introduction

Redigo Codis

Redigo Codis is a go client for codis based on Redigo.

Features

Use a round robin policy to balance load to multiple codis proxies.
Detect proxy online and offline automatically.

How to use

import (
    "time"

    "github.com/garyburd/redigo/redis"
    "github.com/tranch-xiao/redigo-codis"
)

p := &codis.Pool{
    ZkServers: []string{"locallhost:8021"},
    ZkTimeout: time.Second * 60,
    ZkPath: "/codis/proxy",
    Dail: func(network, address string) (redis.Conn, error) {
        conn, err := redis.Dial(network, address)
        if err == nil {
            conn.Send("AUTH", "PASSWORD")
        }
        return conn, err
    },
}

r := p.Get()
r.Do("SET", "key", "value")

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asaarashi go-stream

redigo-codis's Issues

初始化连接池遇到了问题

下面是我初始化的代码（没有密码）：

func init() {
	client = &codis.Pool{
		ZkServers: []string{"10.100.55.51:2181"},
		ZkTimeout: time.Second * 60,
		ZkDir: "/zk/codis/db_lzh_test/proxy",
		Dial: func(network, address string) (redis.Conn, error) {
			conn, err := redis.Dial(network, address)
			
			return conn, err
		},
	}
}

发现连接池连接数是0，查看源码发现在 codis.go 的 52 行，转化session的时候, data 中没有 Proto_type 和 Proxy_addr。data的值为：

{
   "id":"proxy_10.100.55.51_10190",
   "addr":"10.100.55.51:10190",
   "last_event":"",
   "last_event_ts":0,
   "state":"online",
   "description":"",
   "debug_var_addr":"10.100.55.51:10191",
   "pid":19,
   "start_at":"2017-09-07 02:02:31.613248063 +0000 UTC"
}

链接codis的样例代码更新

p := &codis.Pool{
	ZkServers: []string{"locallhost:8021"},
	ZkTimeout: time.Second * 60,
	ZkDir: "/codis/proxy",
	Dial: func(network, address string) (redis.Conn, error) {
		conn, err := redis.Dial(network, address)
		if err == nil {
			conn.Send("AUTH", "PASSWORD")
		}
		return conn, err
	},
}

连接关闭问题

时间久了，发现pool 中的链接closed了，出现了error，不能正常使用。源码中没有做链接有效性的验证，并且一个zk 只创建了一个链接。

我修改了Dial 函数返回一个*redis.Pool ，实现方式是用的redisgo。并修改了Get 方法，先得到一个zk的redis.Pool，再用redisgo中的Get方法得到链接。发现没有出现链接无效的问题。有个遗憾就是没有把所有zk的链接放在一个pool中。不知道大神有什么其他好的方法，望相告

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