Linux环境下Redis集群实践

环境:centos 7

一、编译及安装redis源码

源码地址:redis版本发布列表

cd redis-3.2.8
sudo make && make install

二、创建节点

 创建Redis-Cluster 文件夹,并创建7000-7005共6个文件夹

复制源码中的redis.conf文件并修改以下内容后分别放入7000-7005文件夹

【7000】示例

bind 192.168.1.105
port 7000
cluster-enabled yes
cluster-config-file /home/jabben/Redis-Cluster/7000/nodes-7000.conf
pidfile /home/jabben/Redis-Cluster/7000/redis_7000.pid cluster-node-timeout 5000 daemonize yes

分别启动6个Redis节点:

redis-server 7000/redis.conf
redis-server 7001/redis.conf
redis-server 7002/redis.conf
redis-server 7003/redis.conf
redis-server 7004/redis.conf
redis-server 7005/redis.conf

查看redis进程是否已经启动:

ps -ef | grep redis

三、创建集群

 复制redis-trib.rb文件到bin目录下

cd /home/jabben/Redis-Cluster/Source/redis-3.2.8/src
sudo cp redis-trib.rb /usr/local/bin/

安装ruby环境

yum install ruby

安装rubygems组件

yum install rubygems

安装gem-redis

gem install redis

创建集群

redis-trib.rb create --replicas 1 192.168.1.105:7000 192.168.1.105:7001 192.168.1.105:7002 192.168.1.105:7003 192.168.1.105:7004 192.168.1.105:7005
>>> Creating cluster
>>> Performing hash slots allocation on 6 nodes...
Using 3 masters:
192.168.1.105:7000
192.168.1.105:7001
192.168.1.105:7002
Adding replica 192.168.1.105:7003 to 192.168.1.105:7000
Adding replica 192.168.1.105:7004 to 192.168.1.105:7001
Adding replica 192.168.1.105:7005 to 192.168.1.105:7002
M: 339aafedd6bd7f6bd5cd98407f7ebe8cb0c4efbd 192.168.1.105:7000
   slots:0-5460 (5461 slots) master
M: 7bd0b20971d5fc929f8454c6ff388f780cc70e77 192.168.1.105:7001
   slots:5461-10922 (5462 slots) master
M: aaa4b5109c5bcf1aa868621f59b51fb4d6feef9c 192.168.1.105:7002
   slots:10923-16383 (5461 slots) master
S: e731c1918fad61f972fbca4ab6523da1d9f827af 192.168.1.105:7003
   replicates 339aafedd6bd7f6bd5cd98407f7ebe8cb0c4efbd
S: c16b520a5075b0fee0840cc26cf1f7f27bad8e45 192.168.1.105:7004
   replicates 7bd0b20971d5fc929f8454c6ff388f780cc70e77
S: 990a4e7a2831d8d9ba8f9835557be6a394d393a4 192.168.1.105:7005
   replicates aaa4b5109c5bcf1aa868621f59b51fb4d6feef9c
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 192.168.1.105:7000)
M: 339aafedd6bd7f6bd5cd98407f7ebe8cb0c4efbd 192.168.1.105:7000
   slots:0-5460 (5461 slots) master
   1 additional replica(s)
S: 990a4e7a2831d8d9ba8f9835557be6a394d393a4 192.168.1.105:7005
   slots: (0 slots) slave
   replicates aaa4b5109c5bcf1aa868621f59b51fb4d6feef9c
S: e731c1918fad61f972fbca4ab6523da1d9f827af 192.168.1.105:7003
   slots: (0 slots) slave
   replicates 339aafedd6bd7f6bd5cd98407f7ebe8cb0c4efbd
M: aaa4b5109c5bcf1aa868621f59b51fb4d6feef9c 192.168.1.105:7002
   slots:10923-16383 (5461 slots) master
   1 additional replica(s)
S: c16b520a5075b0fee0840cc26cf1f7f27bad8e45 192.168.1.105:7004
   slots: (0 slots) slave
   replicates 7bd0b20971d5fc929f8454c6ff388f780cc70e77
M: 7bd0b20971d5fc929f8454c6ff388f780cc70e77 192.168.1.105:7001
   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.

至此集群搭建完毕

四、测试

使用redis-cli客户端连接到刚创建的集群

redis-cli -c -h 192.168.1.105 -p 7000

查询集群相关信息

192.168.1.105:7000> CLUSTER INFO
cluster_state:ok
cluster_slots_assigned:16384
cluster_slots_ok:16384
cluster_slots_pfail:0
cluster_slots_fail:0
cluster_known_nodes:6
cluster_size:3
cluster_current_epoch:6
cluster_my_epoch:1
cluster_stats_messages_sent:2645
cluster_stats_messages_received:2645

【数据写入测试】

192.168.1.105:7000> set name zhangsan
-> Redirected to slot [5798] located at 192.168.1.105:7001
OK
192.168.1.105:7001> get name
"zhangsan"

【集群线性扩展】

 待完善

【失效转移】

 待完善

五、集群相关常用命令 

链接:https://redis.io/commands

CLUSTER INFO 打印集群的信息
CLUSTER NODES 列出集群当前已知的所有节点(node),以及这些节点的相关信息。 
//节点
CLUSTER MEET <ip> <port> 将 ip 和 port 所指定的节点添加到集群当中,让它成为集群的一份子。
CLUSTER FORGET <node_id> 从集群中移除 node_id 指定的节点。
CLUSTER REPLICATE <node_id> 将当前节点设置为 node_id 指定的节点的从节点。
CLUSTER SAVECONFIG 将节点的配置文件保存到硬盘里面。
CLUSTER ADDSLOTS <slot> [slot ...] 将一个或多个槽(slot)指派(assign)给当前节点。
CLUSTER DELSLOTS <slot> [slot ...] 移除一个或多个槽对当前节点的指派。
CLUSTER FLUSHSLOTS 移除指派给当前节点的所有槽,让当前节点变成一个没有指派任何槽的节点。
CLUSTER SETSLOT <slot> NODE <node_id> 将槽 slot 指派给 node_id 指定的节点。
CLUSTER SETSLOT <slot> MIGRATING <node_id> 将本节点的槽 slot 迁移到 node_id 指定的节点中。
CLUSTER SETSLOT <slot> IMPORTING <node_id> 从 node_id 指定的节点中导入槽 slot 到本节点。
CLUSTER SETSLOT <slot> STABLE 取消对槽 slot 的导入(import)或者迁移(migrate)。 
//键
CLUSTER KEYSLOT <key> 计算键 key 应该被放置在哪个槽上。
CLUSTER COUNTKEYSINSLOT <slot> 返回槽 slot 目前包含的键值对数量。
CLUSTER GETKEYSINSLOT <slot> <count> 返回 count 个 slot 槽中的键。 
//新增
CLUSTER SLAVES node-id 返回一个master节点的slaves 列表
原文地址:https://www.cnblogs.com/Jabben_Yi/p/6696837.html