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redis集群搭建_动力节点Java学院整理_Redis_

2023-05-27 510人已围观

简介 redis集群搭建_动力节点Java学院整理_Redis_

现在项目上用redis的话,很少说不用集群的情况,毕竟如果生产上只有一台redis会有极大的风险,比如机器挂掉,或者内存爆掉,就比如我们生产环境曾今也遭遇到这种情况,导致redis内存不够挂掉的情况,当然这些都是我们及其不能容忍的,第一个必须要做到高可靠,其次才是高性能,好了,下面我来逐一搭建一下。

一:Redis集群搭建

1. 下载

首先去官网下载较新的3.2.0版本,下载方式还是非常简单的,比如官网介绍的这样。

 $ wget http://download.redis.io/releases/redis-3.2.0.tar.gz $ tar xzf redis-3.2.0.tar.gz $ cd redis-3.2.0 $ make 

2. redis配置

由于我们要做集群,而且还要redis自带的redis-trib.rb 能正常运行,我们需要在集群中开启三台master,三台slave,所以这里我需要建立6个文件夹,而且文件夹的名称就使用端口地址的名字,比如:6389. 6380....6384。

3. config配置。

现在directory的分布情况大致如上图,接下来要做的事情就是配置redis.conf了,在这里需要配置四个选项。。。

<1> port  端口地址,比如6380文件夹下面的port就是6380,

 # Accept connections on the specified port, default is 6379 (IANA #815344). # If port 0 is specified Redis will not listen on a TCP socket. port 6379

<2> cluster-enabled 和 cluster-config-file

这个顾名思义,首先需要开启redis的cluster模式,然后配置一个cluster-config-file文件,这个文件用于存放redis的实时信息,redis会动态追加和修改这个conf下面的内容信息,不过要记住,这个nodes-6379.conf 可以根据 端口文件夹依次配置,比如6380文件夹可以改成nodes-6380.conf这样。。。

 # Normal Redis instances can't be part of a Redis Cluster; only nodes that are # started as cluster nodes can. In order to start a Redis instance as a # cluster node enable the cluster support uncommenting the following: # cluster-enabled yes # Every cluster node has a cluster configuration file. This file is not # intended to be edited by hand. It is created and updated by Redis nodes. # Every Redis Cluster node requires a different cluster configuration file. # Make sure that instances running in the same system do not have # overlapping cluster configuration file names. # cluster-config-file nodes-6379.conf 

<3> directory

为了方便管理,我这里配置的root目录取决于在哪个文件夹,比如6380下面我的dir就是: dir ./6380/

 # Note that you must specify a directory here, not a file name. dir ./6379/

<4> protected-mode

这个是redis 3.2 才追加的一个功能,从功能注释中,我们就可以发现,这个默认就是不让外界可以访问redis,所以这里我们就改为no,可以远程访问。

 # By default protected mode is enabled. You should disable it only if # you are sure you want clients from other hosts to connect to Redis # even if no authentication is configured, nor a specific set of interfaces # are explicitly listed using the "bind" directive. protected-mode no

ok,到现在为止,我们的config就修改完毕了,其他端口的文件夹也可以依次配置之~

二:开启redis

到现在为止,各个端口文件夹都配置成功了,接下来准备开启了。

接下来我们可以看一下,在6379下面是不是有生成node-6379.conf文件,比如下面:

三:配置redis-trib.rb

因为redis-trib.rb是ruby写的,而我们的电脑肯定是没有ruby和一些配置依赖项,不过没关系,有强大的yum安装,一切都不是问题。

1. 执行replicas命令

 [jack@localhost ~]$ cluster/redis-trib.rb create --replicas 1 192.168.161.133:6379 192.168.161.133:6380 192.168.161.133:6381 192.168.161.133:6382 192.168.161.133:6383 192.168.161.133:6384 /usr/bin/env: ruby: No such file or directory [jack@localhost ~]$ 

可以看到ruby是没有安装的,所以下一步我们要安装ruby了。。。

2. 安装ruby 【一定要是管理员权限哦】

 [jack@localhost ~]$ sudo usage: sudo [-D level] -h | -K | -k | -V usage: sudo -v [-AknS] [-D level] [-g groupname|#gid] [-p prompt] [-u user name|#uid] usage: sudo -l[l] [-AknS] [-D level] [-g groupname|#gid] [-p prompt] [-U user name] [-u user name|#uid] [-g groupname|#gid] [command] usage: sudo [-AbEHknPS] [-r role] [-t type] [-C fd] [-D level] [-g groupname|#gid] [-p prompt] [-u user name|#uid] [-g groupname|#gid] [VAR=value] [-i|-s] [] usage: sudo -e [-AknS] [-r role] [-t type] [-C fd] [-D level] [-g groupname|#gid] [-p prompt] [-u user name|#uid] file ... [jack@localhost ~]$ su Password: jacsu: incorrect password [jack@localhost ~]$ yum install ruby Loaded plugins: fastestmirror, refresh-packagekit, security You need to be root to perform this command. [jack@localhost ~]$ jack bash: jack: command not found [jack@localhost ~]$ su Password: [root@localhost jack]# yum install ruby Loaded plugins: fastestmirror, refresh-packagekit, security Loading mirror speeds from cached hostfile * base: mirror.bit.edu.cn * extras: mirror.bit.edu.cn * updates: mirror.bit.edu.cn Setting up Install Process Resolving Dependencies --> Running transaction check ---> Package ruby.x86_64 0:1.8.7.374-4.el6_6 will be installed --> Processing Dependency: ruby-libs = 1.8.7.374-4.el6_6 for package: ruby-1.8.7.374-4.el6_6.x86_64 --> Processing Dependency: libruby.so.1.8()(64bit) for package: ruby-1.8.7.374-4.el6_6.x86_64 --> Running transaction check ---> Package ruby-libs.x86_64 0:1.8.7.374-4.el6_6 will be installed --> Processing Dependency: libreadline.so.5()(64bit) for package: ruby-libs-1.8.7.374-4.el6_6.x86_64 --> Running transaction check ---> Package compat-readline5.x86_64 0:5.2-17.1.el6 will be installed --> Finished Dependency Resolution Dependencies Resolved ================================================================================ Package Arch Version Repository Size ================================================================================ Installing: ruby x86_64 1.8.7.374-4.el6_6 base 538 k Installing for dependencies: compat-readline5 x86_64 5.2-17.1.el6 base 130 k ruby-libs x86_64 1.8.7.374-4.el6_6 base 1.7 M Transaction Summary ================================================================================ Install 3 Package(s) Total download size: 2.3 M Installed size: 7.8 M Is this ok [y/N]: y Downloading Packages: (1/3): compat-readline5-5.2-17.1.el6.x86_64.rpm | 130 kB 00:00 (2/3): ruby-1.8.7.374-4.el6_6.x86_64.rpm | 538 kB 00:00 (3/3): ruby-libs-1.8.7.374-4.el6_6.x86_64.rpm | 1.7 MB 00:02 -------------------------------------------------------------------------------- Total 747 kB/s | 2.3 MB 00:03 warning: rpmts_HdrFromFdno: Header V3 RSA/SHA256 Signature, key ID c105b9de: NOKEY Retrieving key from file:///etc/pki/rpm-gpg/RPM-GPG-KEY-CentOS-6 Importing GPG key 0xC105B9DE: Userid : CentOS-6 Key (CentOS 6 Official Signing Key)  Package: centos-release-6-5.el6.centos.11.1.x86_64 (@anaconda-CentOS-201311272149.x86_64/6.5) From : /etc/pki/rpm-gpg/RPM-GPG-KEY-CentOS-6 Is this ok [y/N]: y Running rpm_check_debug Running Transaction Test Transaction Test Succeeded Running Transaction Installing : compat-readline5-5.2-17.1.el6.x86_64 1/3 Installing : ruby-libs-1.8.7.374-4.el6_6.x86_64 2/3 Installing : ruby-1.8.7.374-4.el6_6.x86_64 3/3 Verifying : compat-readline5-5.2-17.1.el6.x86_64 1/3 Verifying : ruby-libs-1.8.7.374-4.el6_6.x86_64 2/3 Verifying : ruby-1.8.7.374-4.el6_6.x86_64 3/3 Installed: ruby.x86_64 0:1.8.7.374-4.el6_6 Dependency Installed: compat-readline5.x86_64 0:5.2-17.1.el6 ruby-libs.x86_64 0:1.8.7.374-4.el6_6 Complete! [root@localhost jack]# 

3. 安装rubygems

接着我们再次运行 replicas命令,看看会怎么样。。。 

 [root@localhost jack]# cluster/redis-trib.rb create --replicas 1 192.168.161.133:6379 192.168.161.133:6380 192.168.161.133:6381 192.168.161.133:6382 192.168.161.133:6383 192.168.161.133:6384 cluster/redis-trib.rb:24:in `require': no such file to load -- rubygems (LoadError) from cluster/redis-trib.rb:24 [root@localhost jack]# 

结果苦逼了,还是报错,看提示貌似是少了一个rubygems,这次我们还是通过yum安装。

 [root@localhost jack]# yum install -y rubygems Loaded plugins: fastestmirror, refresh-packagekit, security Loading mirror speeds from cached hostfile * base: mirror.bit.edu.cn * extras: mirror.bit.edu.cn * updates: mirror.bit.edu.cn Setting up Install Process Resolving Dependencies --> Running transaction check ---> Package rubygems.noarch 0:1.3.7-5.el6 will be installed --> Processing Dependency: ruby-rdoc for package: rubygems-1.3.7-5.el6.noarch --> Running transaction check ---> Package ruby-rdoc.x86_64 0:1.8.7.374-4.el6_6 will be installed --> Processing Dependency: ruby-irb = 1.8.7.374-4.el6_6 for package: ruby-rdoc-1.8.7.374-4.el6_6.x86_64 --> Running transaction check ---> Package ruby-irb.x86_64 0:1.8.7.374-4.el6_6 will be installed --> Finished Dependency Resolution Dependencies Resolved ================================================================================ Package Arch Version Repository Size ================================================================================ Installing: rubygems noarch 1.3.7-5.el6 base 207 k Installing for dependencies: ruby-irb x86_64 1.8.7.374-4.el6_6 base 317 k ruby-rdoc x86_64 1.8.7.374-4.el6_6 base 381 k Transaction Summary ================================================================================ Install 3 Package(s) Total download size: 905 k Installed size: 3.0 M Downloading Packages: (1/3): ruby-irb-1.8.7.374-4.el6_6.x86_64.rpm | 317 kB 00:00 (2/3): ruby-rdoc-1.8.7.374-4.el6_6.x86_64.rpm | 381 kB 00:00 (3/3): rubygems-1.3.7-5.el6.noarch.rpm | 207 kB 00:00 -------------------------------------------------------------------------------- Total 625 kB/s | 905 kB 00:01 Running rpm_check_debug Running Transaction Test Transaction Test Succeeded Running Transaction Installing : rub
                
                

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