单机部署redis集群，8节点四主四从。

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dreamyoungman 2019-02-27 18:21:54 博主文章分类：组件 ©著作权

文章标签 redis redis集群部署 redis八节点部署 文章分类 运维

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项目中用到了redis集群，趁机研究下redis单机集群的部署。用的虚拟机系统CentOS release 6.9 (Final)和redis-4.0.8。查看虚拟机系统的版本命令：

[root@nlfd local]# cat /etc/centos

其实可以先总结下基本步骤： 1、下载redis安装包，进行编译 2、对编译好的redis复制多份，每份即一个节点，修改每个节点的redis.conf文件。包括端口、绑定ip、打开集群、个性化的节点配置文件替换等（一般使用默认的节点配置文件）。 3、分别依次启动多个节点，利用redis自带的./redis-trib.rb进行节点创建，需要注意的是这个要依赖于ruby。 4、查看集群是否创建成功。

接下下进行具体的操作： 1、下载编译redis4.0.8 下载redis-4.0.8 [root@nlfd home]# http://download.redis.io/releases/redis-4.0.8.tar.gz 解压编译 [root@nlfd home]# tar -zxvf redis-4.0.8.tar.gz [root@nlfd home]# cd redis-4.0.8 [root@nlfd redis-4.0.8]# make [root@nlfd redis-4.0.8]# make test [root@nlfd redis-4.0.8]# make install

2、配置结点创建要部署结点的文件夹 [root@nlfd redis-4.0.8]# mkdir -p /usr/local/cluster [root@nlfd redis-4.0.8]# mkdir -p /usr/local/cluster/7000 [root@nlfd redis-4.0.8]# mkdir -p /usr/local/cluster/7001 [root@nlfd redis-4.0.8]# mkdir -p /usr/local/cluster/7002 [root@nlfd redis-4.0.8]# mkdir -p /usr/local/cluster/7003 [root@nlfd redis-4.0.8]# mkdir -p /usr/local/cluster/7004 [root@nlfd redis-4.0.8]# mkdir -p /usr/local/cluster/7005 [root@nlfd redis-4.0.8]# mkdir -p /usr/local/cluster/7006 [root@nlfd redis-4.0.8]# mkdir -p /usr/local/cluster/7007

复制编译好的redis到创建好的目录下面去 [root@nlfd redis-4.0.8]# cp -rf /home/redis-4.0.8/* /usr/local/cluster/7000/ [root@nlfd redis-4.0.8]# cp -rf /home/redis-4.0.8/* /usr/local/cluster/7001/ [root@nlfd redis-4.0.8]# cp -rf /home/redis-4.0.8/* /usr/local/cluster/7002/ [root@nlfd redis-4.0.8]# cp -rf /home/redis-4.0.8/* /usr/local/cluster/7003/ [root@nlfd redis-4.0.8]# cp -rf /home/redis-4.0.8/* /usr/local/cluster/7004/ [root@nlfd redis-4.0.8]# cp -rf /home/redis-4.0.8/* /usr/local/cluster/7005/ [root@nlfd redis-4.0.8]# cp -rf /home/redis-4.0.8/* /usr/local/cluster/7006/ [root@nlfd redis-4.0.8]# cp -rf /home/redis-4.0.8/* /usr/local/cluster/7007/

修改配置文件 [root@nlfd redis-4.0.8]# vi /usr/local/cluster/7000/redis.conf daemonize yes
port 7000
appendonly yes
cluster-enabled yes
cluster-config-file nodes.conf
cluster-node-timeout 5000

用7000/redis.conf覆盖7001,7002,7003,7004,7005,7006,7007目录下的redis.conf [root@nlfd redis-4.0.8]# cp /usr/local/cluster/7000/redis.conf /usr/local/cluster/7001 [root@nlfd redis-4.0.8]# cp /usr/local/cluster/7000/redis.conf /usr/local/cluster/7002 [root@nlfd redis-4.0.8]# cp /usr/local/cluster/7000/redis.conf /usr/local/cluster/7003 [root@nlfd redis-4.0.8]# cp /usr/local/cluster/7000/redis.conf /usr/local/cluster/7004 [root@nlfd redis-4.0.8]# cp /usr/local/cluster/7000/redis.conf /usr/local/cluster/7005 [root@nlfd redis-4.0.8]# cp /usr/local/cluster/7000/redis.conf /usr/local/cluster/7006 [root@nlfd redis-4.0.8]# cp /usr/local/cluster/7000/redis.conf /usr/local/cluster/7007 然后分别修改7001-7007里面的配置文件中的端口为7001-7007.

3、启动8个结点 [root@nlfd src]# cd /usr/local/cluster/7000/src [root@nlfd src]# redis-server ../redis.conf [root@nlfd src]# cd /usr/local/cluster/7001/src [root@nlfd src]# redis-server ../redis.conf [root@nlfd src]# cd /usr/local/cluster/7002/src [root@nlfd src]# redis-server ../redis.conf [root@nlfd src]# cd /usr/local/cluster/7003/src [root@nlfd src]# redis-server ../redis.conf [root@nlfd src]# cd /usr/local/cluster/7004/src [root@nlfd src]# redis-server ../redis.conf [root@nlfd src]# cd /usr/local/cluster/7005/src [root@nlfd src]# redis-server ../redis.conf [root@nlfd src]# cd /usr/local/cluster/7006/src [root@nlfd src]# redis-server ../redis.conf [root@nlfd src]# cd /usr/local/cluster/7007/src [root@nlfd src]# redis-server ../redis.conf

[root@nlfd src]# ps -aux|grep redis Warning: bad syntax, perhaps a bogus '-'? See /usr/share/doc/procps-3.2.8/FAQ root 9610 1.3 0.6 150064 11880 ? Ssl 16:02 0:01 redis-server 127.0.0.1:7000 [cluster] root 9644 0.8 0.6 150064 11876 ? Ssl 16:04 0:00 redis-server 127.0.0.1:7001 [cluster] root 9657 0.8 0.6 150064 11876 ? Ssl 16:04 0:00 redis-server 127.0.0.1:7002 [cluster] root 9670 0.7 0.6 150064 11876 ? Ssl 16:04 0:00 redis-server 127.0.0.1:7003 [cluster] root 9683 0.5 0.6 150064 11864 ? Ssl 16:04 0:00 redis-server 127.0.0.1:7004 [cluster] root 9698 0.4 0.6 150064 11872 ? Ssl 16:04 0:00 redis-server 127.0.0.1:7005 [cluster] root 9713 0.5 0.6 150064 11876 ? Ssl 16:04 0:00 redis-server 127.0.0.1:7006 [cluster] root 9728 0.3 0.6 150064 11872 ? Ssl 16:04 0:00 redis-server 127.0.0.1:7007 [cluster] root 9735 0.0 0.0 103336 900 pts/0 S+ 16:04 0:00 grep redis

可以看到8个几点已经全部启动成功，接下来就是创建集群了。

4 创建集群 [root@nlfd src]# cd /home/redis-4.0.8/src/ [root@nlfd src]# ./redis-trib.rb create --replicas 1 127.0.0.1:7000 127.0.0.1:7002 127.0.0.1:7003 127.0.0.1:7004 127.0.0.1:7005 127.0.0.1:7006 127.0.0.1:7007 127.0.0.1:7007

出现如下情况，输入yes

Creating cluster Performing hash slots allocation on 8 nodes... Using 4 masters: 127.0.0.1:7000 127.0.0.1:7002 127.0.0.1:7003 127.0.0.1:7004 Adding replica 127.0.0.1:7006 to 127.0.0.1:7000 Adding replica 127.0.0.1:7007 to 127.0.0.1:7002 Adding replica 127.0.0.1:7001 to 127.0.0.1:7003 Adding replica 127.0.0.1:7005 to 127.0.0.1:7004

Trying to optimize slaves allocation for anti-affinity [WARNING] Some slaves are in the same host as their master M: 741c0bf753e65c8e6deca11b8efb994519303daa 127.0.0.1:7000 slots:0-4095 (4096 slots) master M: 7c4e1dae5c6ce5660156fb727d36f34fb2c65423 127.0.0.1:7002 slots:4096-8191 (4096 slots) master M: 3329c221b5f689b1bfe26b5ac6996c4a29dea0b3 127.0.0.1:7003 slots:8192-12287 (4096 slots) master M: faea5db1781470acf660962414ef4772f6e7c28b 127.0.0.1:7004 slots:12288-16383 (4096 slots) master S: 727abe639adfdea836c0132e2b61d5a5bdbaf967 127.0.0.1:7005 replicates 3329c221b5f689b1bfe26b5ac6996c4a29dea0b3 S: 5fc6364410bae6b2dfe31c8896658738a39f2d7f 127.0.0.1:7006 replicates faea5db1781470acf660962414ef4772f6e7c28b S: e76e4989e8bb94aa23302002a1934e8ac90fbcd9 127.0.0.1:7007 replicates 7c4e1dae5c6ce5660156fb727d36f34fb2c65423 S: 97f2f9750fb571c6884ca01aedc5cf74d2e254ea 127.0.0.1:7001 replicates 741c0bf753e65c8e6deca11b8efb994519303daa Can I set the above configuration? (type 'yes' to accept):

Nodes configuration updated Assign a different config epoch to each node Sending CLUSTER MEET messages to join the cluster Waiting for the cluster to join.....

Performing Cluster Check (using node 127.0.0.1:7000) M: 741c0bf753e65c8e6deca11b8efb994519303daa 127.0.0.1:7000 slots:0-4095 (4096 slots) master 1 additional replica(s) M: faea5db1781470acf660962414ef4772f6e7c28b 127.0.0.1:7004 slots:12288-16383 (4096 slots) master 1 additional replica(s) M: 3329c221b5f689b1bfe26b5ac6996c4a29dea0b3 127.0.0.1:7003 slots:8192-12287 (4096 slots) master 1 additional replica(s) S: 5fc6364410bae6b2dfe31c8896658738a39f2d7f 127.0.0.1:7006 slots: (0 slots) slave replicates faea5db1781470acf660962414ef4772f6e7c28b S: e76e4989e8bb94aa23302002a1934e8ac90fbcd9 127.0.0.1:7007 slots: (0 slots) slave replicates 7c4e1dae5c6ce5660156fb727d36f34fb2c65423 S: 97f2f9750fb571c6884ca01aedc5cf74d2e254ea 127.0.0.1:7001 slots: (0 slots) slave replicates 741c0bf753e65c8e6deca11b8efb994519303daa S: 727abe639adfdea836c0132e2b61d5a5bdbaf967 127.0.0.1:7005 slots: (0 slots) slave replicates 3329c221b5f689b1bfe26b5ac6996c4a29dea0b3 M: 7c4e1dae5c6ce5660156fb727d36f34fb2c65423 127.0.0.1:7002 slots:4096-8191 (4096 slots) master 1 additional replica(s) [OK] All nodes agree about slots configuration.

Check for open slots... Check slots coverage... [OK] All 16384 slots covered.

至此redis节点集群创建完成。

5、在创建集群是有可能遇到的问题及解决方法 /usr/bin/env: ruby: 没有那个文件或目录解决方案：# yum install ruby

	./redis-trib.rb:24:in ‘require’: no such file to load -- rubygems (LoadError) from ./redis-trib.rb:24
	解决方案：# yum install rubygems
	
	/usr/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:31:in ‘gem_original_require': no such file to load -- redis (LoadError) from  /usr/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:31:in ‘require'  from ./redis-trib.rb:25
	解决方案：# gem install redis
	
	redis requires Ruby version >= 2.2.2
	解决方案：
	1).安装curl
		sudo yum install curl
	2). 安装RVM
		curl -L get.rvm.io | bash -s stable 
	3). 
		source /usr/local/rvm/scripts/rvm
	4). 查看rvm库中已知的ruby版本
		rvm list known
	5). 安装一个ruby版本
		rvm install 2.3.3
	6). 使用一个ruby版本
		rvm use 2.3.3
	7). 设置默认版本
		rvm remove 2.0.0
	8). 卸载一个已知版本
		ruby --version
	9). 再安装redis就可以了
		gem install redis