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Simple HA tool for codis(https://github.com/wandoulabs/codis)

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codis-ha's Introduction

Notes: The project is deprecated after codis 3.0

Please use new version of codis

Usage:

go get github.com/ngaut/codis-ha

cd codis-ha

go build

codis-ha --codis-config=localhost:18087 --productName=test

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codis-ha's Issues

[warning] github.com/ngaut/codis-ha/servergroup.go:40: can not find any slave in this group

use codis-ha,after master shutdown,slave not promote master?

我想redis添加密码验证，怎么使用codis-ha

我想redis添加密码验证，怎么使用codis-ha？怎么更改代码？

这是什么问题

github.com/wandoulabs/codis/pkg/models

../../wandoulabs/codis/pkg/models/server_group.go:220: undefined: utils.SlaveNoOne
../../wandoulabs/codis/pkg/models/server_group.go:323: undefined: utils.SlaveOf

谁有打包好的codis-ha可以给我一个。。。我下载不了

谁有打包好的codis-ha可以给我一个。。。我下载不了，万分感谢！

codis-ha started will put my slave becomes offline state, what is the principle ha, I should be where to start start the verify to change status from offine to slave??

redischecker.go中“_ AliveChecker”的作用

var ( _ AliveChecker = &redisChecker{} )

redischecker.go中这个定义的作用是什么呢？我看在acf中是返回一个实例的啊

go下载不下来是什么问题？

go get github.com/ngaut/codis-ha
go: missing Git command. See http://golang.org/s/gogetcmd
package github.com/ngaut/codis-ha: exec: "git": executable file not found in $PATH

codis-ha切换主从后无法取数

安装了codis集群，并用了codis-ha。
可以实现主从切换，但是切换后，在codis-proxy访问原master中的数据，报错：
“Error: Server closed the connection”
这样虽然切换了主从，但是对外应用来说，有一部分数据无法读写。
请问是什么问题呢？

elect a best slave for promotion?

func getSlave(master *models.Server) (*models.Server, error) {
    var group models.ServerGroup
    err := callHttp(&group, genUrl(*apiServer, "/api/server_group/", master.GroupId), "GET", nil)
    if err != nil {
        return nil, errors.Trace(err)
    }

    for _, s := range group.Servers {
        if s.Type == models.SERVER_TYPE_SLAVE {
            return &s, nil
        }
    }

    return nil, errors.Errorf("can not find any slave in this group: %v", group)
}

If the master has more slaves, we must choose the best one which has the most up-to-date data with master, not just the first one.

I think we can use Role command to get the slave's replication offset, and elect the best one which has the biggest offset.

安装问题

安装不成功，请问怎么解决？ Google 也没有找到解决办法。

    [root@iZj6c2oby5qekmk90n76jfZ_10.139.96.2 /data/programs]# echo $GOPATH
    /data/programs/codis
    [root@iZj6c2oby5qekmk90n76jfZ_10.139.96.2 /data/programs]# 
    [root@iZj6c2oby5qekmk90n76jfZ_10.139.96.2 /data/programs]# mkdir -p codis
    [root@iZj6c2oby5qekmk90n76jfZ_10.139.96.2 /data/programs]# go get github.com/ngaut/codis-ha
    # github.com/ngaut/codis-ha
    codis/src/github.com/ngaut/codis-ha/servergroup.go:10: undefined: models.ServerGroup
    codis/src/github.com/ngaut/codis-ha/servergroup.go:11: undefined: models.ServerGroup
    codis/src/github.com/ngaut/codis-ha/servergroup.go:39: undefined: models.Server
    codis/src/github.com/ngaut/codis-ha/servergroup.go:55: undefined: models.Server
    codis/src/github.com/ngaut/codis-ha/servergroup.go:82: undefined: models.Server
    codis/src/github.com/ngaut/codis-ha/servergroup.go:90: undefined: models.Server
    codis/src/github.com/ngaut/codis-ha/servergroup.go:90: undefined: models.ServerGroup
    codis/src/github.com/ngaut/codis-ha/servergroup.go:123: undefined: models.Server
    codis/src/github.com/ngaut/codis-ha/servergroup.go:123: undefined: models.ServerGroup
    codis/src/github.com/ngaut/codis-ha/servergroup.go:11: too many errors
    [root@iZj6c2oby5qekmk90n76jfZ_10.139.96.2 /data/programs]#

codis-ha启动就会把我的slave变为offline状态，ha的原理是什么，我应该从哪入手开始查？

编译失败

mmc@debian:~$ go get github.com/ngaut/codis-ha

github.com/ngaut/codis-ha

golang/3rdLibs/src/github.com/ngaut/codis-ha/servergroup.go:36: cannot use s (type models.Server) as type *models.Server in return argument