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CentOS 7下安装 redis 3.0.6并配置集群的过程详解

2017-01-31 09:21 1231 查看

安装依赖

[root@centos7-1 ~]# yum -y install gcc openssl-devel libyaml-devel libffi-devel readline-devel zlib-devel gdbm-devel ncurses-devel gcc-c++ automake autoconf

安装 redis

[root@centos7-1 ~]# wget http://download.redis.io/releases/redis-3.0.6.tar.gz
[root@centos7-1 ~]# tar xvf redis-3.0.6.tar.gz
[root@centos7-1 ~]# cd redis-3.0.6/
[root@centos7-1 redis-3.0.6]# make MALLOC=libc
[root@centos7-1 redis-3.0.6]# make install

启动 server

通过命令

redis-server
来启动
redis server
。通过下面的输出信息可以看出这次启动并没有指定配置文件,可以使用命令
redis-server /path/to/redis.conf
来指定具体的配置文件启动。

[root@centos7-1 redis-3.0.6]# redis-server
4435:C 25 Jan 11:40:48.816 # Warning: no config file specified, using the default config. In order to specify a config file use redis-server /path/to/redis.conf
4435:M 25 Jan 11:40:48.817 * Increased maximum number of open files to 10032 (it was originally set to 1024).
_._
_.-``__ ''-._
_.-`` `. `_. ''-._   Redis 3.0.6 (00000000/0) 64 bit
.-`` .-```. ```\/ _.,_ ''-._
( '  ,  .-` | `, )  Running in standalone mode
|`-._`-...-` __...-.``-._|'` _.-'|  Port: 6379
| `-._ `._ /  _.-' |  PID: 4435
`-._ `-._ `-./ _.-' _.-'
|`-._`-._ `-.__.-' _.-'_.-'|
| `-._`-._  _.-'_.-' |   http://redis.io
`-._ `-._`-.__.-'_.-' _.-'
|`-._`-._ `-.__.-' _.-'_.-'|
| `-._`-._  _.-'_.-' |
`-._ `-._`-.__.-'_.-' _.-'
`-._ `-.__.-' _.-'
`-._  _.-'
`-.__.-'
4435:M 25 Jan 11:40:48.817 # WARNING: The TCP backlog setting of 511 cannot be enforced because /proc/sys/net/core/somaxconn is set to the lower value of 128.
4435:M 25 Jan 11:40:48.817 # Server started, Redis version 3.0.6
4435:M 25 Jan 11:40:48.817 # WARNING overcommit_memory is set to 0! Background save may fail under low memory condition. To fix this issue add 'vm.overcommit_memory = 1' to /etc/sysctl.conf and then reboot or run the command 'sysctl vm.overcommit_memory=1' for this to take effect.
4435:M 25 Jan 11:40:48.817 # WARNING you have Transparent Huge Pages (THP) supportenabled in your kernel. This will createlatency and memory usage issues with Redis. To fix this issue run the command 'echo never > /sys/kernel/mm/transparent_hugepage/enabled' as root, and add it to your /etc/rc.local in order to retain the setting after a reboot. Redis must be restarted after THP is disabled.
4435:M 25 Jan 11:40:48.817 * DB loaded from disk: 0.000 seconds
4435:M 25 Jan 11:40:48.817 * The server is now ready to accept connections on port6379

到此,单节点的

Redis server
已经安装完毕,以下进入配置和安装集群的过程。

创建集群中的6个节点

集群配置文件

集群相关的配置文件主要修改

redis.conf
中的一下几个地方,因为都部署在一个服务器上,每个节点的端口不同。

[root@centos7-1 redis-3.0.6]$ vi redis.conf
#修改以下地方
port7000
cluster-enabled yes
cluster-config-file nodes-7000.conf
cluster-node-timeout 5000
appendonly yes

每个节点的配置文件

创建6个文件夹,分别表示一个 redis 节点,文件夹使用 redis 节点的端口号命名,文件里存放每个节点的配置文件。

[root@centos7-1 redis-3.0.6]# mkdir /usr/local/redis-cluster
[root@centos7-1 redis-3.0.6]# cd /usr/local/redis-cluster
[root@centos7-1 redis-cluster]# mkdir 7000 7001 7002 7003 7004 7005

拷贝

redis.conf
拷贝到6个文件夹中

[root@centos7-1 redis-cluster]# cp ~/redis-3.0.6/redis.conf 7000
[root@centos7-1 redis-cluster]# cp ~/redis-3.0.6/redis.conf 7001
[root@centos7-1 redis-cluster]# cp ~/redis-3.0.6/redis.conf 7002
[root@centos7-1 redis-cluster]# cp ~/redis-3.0.6/redis.conf 7003
[root@centos7-1 redis-cluster]# cp ~/redis-3.0.6/redis.conf 7004
[root@centos7-1 redis-cluster]# cp ~/redis-3.0.6/redis.conf 7005

并修改每个配置中的内容为各自节点的端口,注意

port
cluster-config-file
的值必须唯一。

分别启动每个节点

[root@centos7-1 ~]# redis-server /usr/local/redis-cluster/7000/redis.conf
[root@centos7-1 ~]# redis-server /usr/local/redis-cluster/7001/redis.conf
[root@centos7-1 ~]# redis-server /usr/local/redis-cluster/7002/redis.conf
[root@centos7-1 ~]# redis-server /usr/local/redis-cluster/7003/redis.conf
[root@centos7-1 ~]# redis-server /usr/local/redis-cluster/7004/redis.conf
[root@centos7-1 ~]# redis-server /usr/local/redis-cluster/7005/redis.conf

启动完成后查看进程

[root@centos7-1 ~]# ps -ef | grep redis
root  4704 2177 0 12:12 pts/0 00:00:07 redis-server *:7000 [cluster]
root  4707 4599 0 12:12 pts/1 00:00:07 redis-server *:7001 [cluster]
root  4710 4638 0 12:12 pts/2 00:00:07 redis-server *:7002 [cluster]
root  4752 4717 0 12:12 pts/3 00:00:07 redis-server *:7003 [cluster]
root  4788 4759 0 12:12 pts/4 00:00:07 redis-server *:7004 [cluster]
root  4824 4795 0 12:13 pts/5 00:00:07 redis-server *:7005 [cluster]
root  9018 8984 0 14:08 pts/6 00:00:00 grep --color=auto redis

建立 Redis 集群

上面的步骤分别创建了6个节点,并已经启动,这里要把这6个节点加入到一个集群里面。redis 已经为我们提供了集群操作的脚本

redis-trib.rb
, 操作起来很简单, 继续。

安装 ruby

由于集群操作需要用到 ruby 脚本

redis-trib.rb
, 所以要安装 ruby 和 rubygems

[root@centos7-1 ~]# yum -y install ruby rubygems
[root@centos7-1 ~]# gem install redis --version 3.0.6
Fetching: redis-3.0.6.gem (100%)
Successfully installed redis-3.0.6
Parsing documentation for redis-3.0.6
Installing ri documentation for redis-3.0.6
1 gem installed

redis-trib.rb
是一个 ruby 脚本工具,用来建立和管理 redis 集群,因为使用比较频繁,所以拷贝脚本
redis-trib.rb
/usr/local/bin/

[root@centos7-1 redis-3.0.6]$ cp src/redis-trib.rb/usr/local/bin/

创建集群

[root@centos7-1 ~]#redis-trib.rb create--replicas 1 127.0.0.1:7000 127.0.0.1:7001 127.0.0.1:7002 127.0.0.1:7003 127.0.0.1:7004 127.0.0.1:7005
>>> Creating cluster
>>> Performing hash slots allocation on 6 nodes...
Using 3 masters:
127.0.0.1:7000
127.0.0.1:7001
127.0.0.1:7002
Adding replica 127.0.0.1:7003 to 127.0.0.1:7000
Adding replica 127.0.0.1:7004 to 127.0.0.1:7001
Adding replica 127.0.0.1:7005 to 127.0.0.1:7002
M: d900d3667196121f95bdbd68ca2317926a6950bc 127.0.0.1:7000
slots:0-5460 (5461 slots) master
M: b662853288cc89a3b78f70120d57c0a34f6a91d5 127.0.0.1:7001
slots:5461-10922 (5462 slots) master
M: 6dc5ee101c2432ec4c1d934d54a6a3565116bbff 127.0.0.1:7002
slots:10923-16383 (5461 slots) master
S: d18e50ac6aff2f612fac43da74a79288aa574c87 127.0.0.1:7003
replicates d900d3667196121f95bdbd68ca2317926a6950bc
S: 85f6455e14d03ebaefeca3dbe3c78c92f2f76ead 127.0.0.1:7004
replicates b662853288cc89a3b78f70120d57c0a34f6a91d5
S: 89d792acda7f2c99c95b0d3947572647cf9edc67 127.0.0.1:7005
replicates 6dc5ee101c2432ec4c1d934d54a6a3565116bbff
Can I set the above configuration? (type 'yes' to accept): yes
>>> 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: d900d3667196121f95bdbd68ca2317926a6950bc 127.0.0.1:7000
slots:0-5460 (5461 slots) master
M: b662853288cc89a3b78f70120d57c0a34f6a91d5 127.0.0.1:7001
slots:5461-10922 (5462 slots) master
M: 6dc5ee101c2432ec4c1d934d54a6a3565116bbff 127.0.0.1:7002
slots:10923-16383 (5461 slots) master
M: d18e50ac6aff2f612fac43da74a79288aa574c87 127.0.0.1:7003
slots: (0 slots) master
replicates d900d3667196121f95bdbd68ca2317926a6950bc
M: 85f6455e14d03ebaefeca3dbe3c78c92f2f76ead 127.0.0.1:7004
slots: (0 slots) master
replicates b662853288cc89a3b78f70120d57c0a34f6a91d5
M: 89d792acda7f2c99c95b0d3947572647cf9edc67 127.0.0.1:7005
slots: (0 slots) master
replicates 6dc5ee101c2432ec4c1d934d54a6a3565116bbff
[OK] All nodes agree about slots configuration.
>>> Check for open slots...
>>> Check slots coverage...
[OK] All 16384 slots covered.

以上

create
命令创建了集群,选项
–replicas 1
表示每个
Master
都需要一个
Slave
。所以结果是集群中创建了3个
Master
节点 和 3个
Slave
节点。

上面信息中 M 表示

Master
节点, S 表示
Slave
节点。

由此可以看出三组

Master
Slave
关系如下:

M: d900d3667196121f95bdbd68ca2317926a6950bc -> S: d18e50ac6aff2f612fac43da74a79288aa574c87
M: 6dc5ee101c2432ec4c1d934d54a6a3565116bbff -> S: 89d792acda7f2c99c95b0d3947572647cf9edc67
M: b662853288cc89a3b78f70120d57c0a34f6a91d5 -> S: 85f6455e14d03ebaefeca3dbe3c78c92f2f76ead

检测集群的状态

[root@centos7-1 ~]#redis-trib.rb check 127.0.0.1:7000
>>> Performing Cluster Check (using node 127.0.0.1:7000)
M: d900d3667196121f95bdbd68ca2317926a6950bc 127.0.0.1:7000
slots:0-5460 (5461 slots) master
1 additional replica(s)
M: 6dc5ee101c2432ec4c1d934d54a6a3565116bbff 127.0.0.1:7002
slots:10923-16383 (5461 slots) master
1 additional replica(s)
S: 89d792acda7f2c99c95b0d3947572647cf9edc67 127.0.0.1:7005
slots: (0 slots) slave
replicates 6dc5ee101c2432ec4c1d934d54a6a3565116bbff
S: d18e50ac6aff2f612fac43da74a79288aa574c87 127.0.0.1:7003
slots: (0 slots) slave
replicates d900d3667196121f95bdbd68ca2317926a6950bc
S: 85f6455e14d03ebaefeca3dbe3c78c92f2f76ead 127.0.0.1:7004
slots: (0 slots) slave
replicates b662853288cc89a3b78f70120d57c0a34f6a91d5
M: b662853288cc89a3b78f70120d57c0a34f6a91d5 127.0.0.1:7001
slots:5461-10922 (5462 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.

测试集群

利用

redis-cli -c -p
端口号 连接集群

[root@centos7-1 ~]# redis-cli -c -p 7000
127.0.0.1:7000> get hello
(nil)
127.0.0.1:7000> set hello "hello world"
OK
127.0.0.1:7000> get hello
"hello world"
127.0.0.1:7000> get name
-> Redirected to slot [5798] located at 127.0.0.1:7001
(nil)
127.0.0.1:7001> set name "redis server"
OK
127.0.0.1:7001> get name
"redis server"

总结

上就是关于在CentOS 7系统下安装redis 3.0.6并配置集群的全部内容了,希望本文的内容对大家的学习或者工作能带来一定的帮助,如果有疑问大家可以留言交流。

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