执行redis命令redis-trib.rb查看集群信息报错cannot load such file -- redis (LoadError)

问题描述：

　　在执行redis-trib.rb命令查看集群状态的时候，报错：

[aiprd@hadoop1 ~]$ redis-trib.rb check 192.168.30.10:
Traceback (most recent call last):
    : from /home/aiprd/softwares/redis-3.2./src/redis-trib.rb::in `<main>'
    : from /home/aiprd/app/ruby-2.6./lib/ruby/2.6./rubygems/core_ext/kernel_require.rb::in `require'
/home/aiprd/app/ruby-2.6./lib/ruby/2.6./rubygems/core_ext/kernel_require.rb::in `require': cannot load such file -- redis (LoadError)

问题解决：

1.从错误来看是少了redis的组件

2.下载redis组件

下载地址：https://rubygems.org/downloads/redis-4.1.2.gem

3.上传至服务器，并安装【gem组件的离线安装】

[aiprd@hadoop1 softwares]$ gem install -l redis-4.1..gem
Successfully installed redis-4.1.
Parsing documentation for redis-4.1.
Installing ri documentation for redis-4.1.
Done installing documentation for redis after  seconds
 gem installed

4.再次执行查看集群信息的命令

[aiprd@hadoop1 softwares]$ redis-trib.rb check 192.168.30.10:
[ERR] Sorry, can't connect to node 192.168.30.10:7000

报错，无法连接上集群节点，由于redis集群开启了认证，因此需要在redis组件的客户端程序中配置redis集群的认证密码

5.进入ruby安装路径，找到redis的client.rb文件

[aiprd@hadoop1 ~]$ cd /home/aiprd/app/ruby/lib/ruby/gems/2.6.0/gems/redis-4.1.2/lib/redis  #/home/aiprd/app/ruby是ruby的安装路径，即--prefix指定的路径
[aiprd@hadoop1 redis]$ ls -l client.rb
-rw-r--r-- 1 aiprd aiprd 16407 Aug  2 11:06 client.rb

6.修改该文件，增加密码如下：

:password => "3GESWjNba9@pMDG",

7.再次执行查看集群状态信息的命令

[aiprd@hadoop1 ~]$ redis-trib.rb check 192.168.30.10:
>>> Performing Cluster Check (using node 192.168.30.10:)
M: 2c8bb60808a0b2bcb155eb45759b8c989cb409f3 192.168.30.10:
   slots:- ( slots) master
    additional replica(s)
M: 4161a6852df45ee50a065e5e275a24cb1b77f1c1 192.168.30.10:
   slots:- ( slots) master
    additional replica(s)
M: b7fdb4a783aa829818eb804c0cc04161ece5e845 192.168.30.10:
   slots:- ( slots) master
    additional replica(s)
S: e6b0a64e05e5f3e8dc4b369967090f78fe3c87dc 192.168.30.11:
   slots: ( slots) slave
   replicates b7fdb4a783aa829818eb804c0cc04161ece5e845
S: 37168bd4232c2d1f1f9a22bd88f221e4f15bf4d9 192.168.30.11:
   slots: ( slots) slave
   replicates 4161a6852df45ee50a065e5e275a24cb1b77f1c1
S: cab31dd3554524187ffb4a2758af91f72c8238ac 192.168.30.11:
   slots: ( slots) slave
   replicates 2c8bb60808a0b2bcb155eb45759b8c989cb409f3
[OK] All nodes agree about slots configuration.
>>> Check for open slots...
>>> Check slots coverage...
[OK] All  slots covered.

命令执行成功，问题解决。

文档创建时间：2019年8月2日11:25:25