Redis cluster 簡單搭建
阿新 • • 發佈：2018-05-09
Redis cluster環境
兩臺虛擬機虛擬6個節點，每臺3個節點，創建出3 master，3 slave 環境
| 系統 | IP | Redis節點 |
|---|---|---|
| CentOS 6 | 192.168.153.12 | 7000、7001、7002 |
| CentOS 7 | 192.168.153.11 | 7003、7004、7005 |
Redis版本：
redis-3.0.6.tar.gz安裝 Redis
Redis官方由於xx原因無法訪問，Redis的包需要自行下載。
tar zxvf redis-3.0.6.tar.gz && cd redis-3.0.6 && make && make install
創建 Redis 節點
在兩臺機器上分別創建一個 redis_cluster 文件夾，這裏放置在 /usr/local 目錄下。（路徑和文件夾名都是可以隨便定義的，你可以在 /tmp/ 下創建一個 xx 目錄，做為集群目錄也可以。）
mkdir -p /usr/local/redis_cluster/然後在 192.168.153.12 下創建 7000、7001、7002 3個目錄。在 192.168.153.11 下創建7003、7004、7005 3個目錄。
在192.168.153.12執行
mkdir -p /usr/local/redis_cluster/700{0..2}在192.168.153.11執行
mkdir -p /usr/local/redis_cluster/700{3..5}
並將 redis.conf 分別拷貝到700* 目錄裏面。redis.conf在前面解壓的源碼包裏面
cd redis-3.0.6 && cp redis.conf /usr/local/redis_cluster/7000
cp redis.conf /usr/local/redis_cluster/7001
... 以此類推分別修改每個700*目錄下的 redis.conf
daemonize yes #做為守護進程運行 port 7000 #這裏是7000目錄下，所以改為7000，如果是7001目錄下就修改為7001 bind 192.168.153.12 #本機ip appendonly yes cluster-enabled yes #開啟集群 cluster-config-file nodes-7000.conf #集群配置文件，同 port 選項，在7001目錄下則修改為7001 cluster-node-timeout 5000
啟動節點
執行命令的時候不會有回顯。如果有回顯，說明啟動有問題。
192.168.153.12
redis-server /usr/local/redis_cluster/7000/redis.conf
redis-server /usr/local/redis_cluster/7001/redis.conf
redis-server /usr/local/redis_cluster/7002/redis.conf192.168.153.11
redis-server /usr/local/redis_cluster/7003/redis.conf
redis-server /usr/local/redis_cluster/7004/redis.conf
redis-server /usr/local/redis_cluster/7005/redis.conf檢查啟動情況
192.168.153.12
ps -ef|grep redis
root 4215 1 0 19:27 ? 00:00:13 redis-server 192.168.153.12:7000 [cluster]
root 4219 1 0 19:27 ? 00:00:13 redis-server 192.168.153.12:7001 [cluster]
root 4223 1 0 19:27 ? 00:00:13 redis-server 192.168.153.12:7002 [cluster]
root 5192 5133 0 21:32 pts/2 00:00:00 grep redis
192.168.153.11
ps -ef|grep redis
root 1138 1 0 14:19 ? 00:00:00 redis-server 192.168.153.11:7003 [cluster]
root 1142 1 0 14:19 ? 00:00:00 redis-server 192.168.153.11:7004 [cluster]
root 1146 1 0 14:19 ? 00:00:00 redis-server 192.168.153.11:7005 [cluster]創建集群
官方提供一個創建集群的工具redis-trib，它位於 Redis 源碼的 src 文件夾中， 它是一個 Ruby 程序， 這個程序通過向實例發送特殊命令來完成創建新集群， 檢查集群， 或者對集群進行重新分片（reshared）等工作。
所以要安裝 Ruby 及 RubyGems。
yum install ruby rubygems -y由於眾所周知的原因，Gems的源也是沒法用的，我們需要將它替換為國內源。
gem sources --add https://gems.ruby-china.org/ --remove https://rubygems.org/
gem sources -l
https://gems.ruby-china.org
# 確保只有 gems.ruby-china.org用 Gems 安裝 Redis
gem install redis上面這個命令會提示你
redis requires Ruby version >= 2.2.2，讓你升級Ruby
因為默認安裝的是最新版 Redis 4.x 版本。而我本次安裝的是 Redis 3.0.6 的，gem安裝的也要配套,所以要用下面這個命令
gem install redis -v 3.0.6redis-trib.rb 這個工具在源碼包下的 src文件夾，現在將它復制到 /usr/local/bin/ 目錄，這樣就可以直接在命令行下使用該工具了。
cp /tmp/redis-3.0.6/src/redis-trib.rb /usr/local/bin/ 運行 redis-trib.rb 工具創建集群
# redis-trib.rb create --replicas 1 192.168.153.12:7000 192.168.153.12:7001 192.168.153.12:7002 192.168.153.11:7003 192.168.153.11:7004 192.168.153.11:7005
>>> Creating cluster
>>> Performing hash slots allocation on 6 nodes...
Using 3 masters:
192.168.153.11:7003
192.168.153.12:7000
192.168.153.11:7004
Adding replica 192.168.153.12:7001 to 192.168.153.11:7003
Adding replica 192.168.153.11:7005 to 192.168.153.12:7000
Adding replica 192.168.153.12:7002 to 192.168.153.11:7004
M: 60aa133262cd817fa729cc2c1103a25e3a9b2311 192.168.153.12:7000
slots:5461-10922 (5462 slots) master
S: 30570cd99b32ffbc5f39ef7df58059a53d51ea50 192.168.153.12:7001
replicates b6454920091c772bb82f166683fd899fddffe35d
S: 560764d15cad022d0d83286d6a83f6aa880cd0e9 192.168.153.12:7002
replicates fa0fcc6e09c5dca5824f23f0b012b1eb3efe247b
M: b6454920091c772bb82f166683fd899fddffe35d 192.168.153.11:7003
slots:0-5460 (5461 slots) master
M: fa0fcc6e09c5dca5824f23f0b012b1eb3efe247b 192.168.153.11:7004
slots:10923-16383 (5461 slots) master
S: 2dc77357e6fb97f15a0fa03ab43e796ed8fb2e2a 192.168.153.11:7005
replicates 60aa133262cd817fa729cc2c1103a25e3a9b2311
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 192.168.153.12:7000)
M: 60aa133262cd817fa729cc2c1103a25e3a9b2311 192.168.153.12:7000
slots:5461-10922 (5462 slots) master
M: 30570cd99b32ffbc5f39ef7df58059a53d51ea50 192.168.153.12:7001
slots: (0 slots) master
replicates b6454920091c772bb82f166683fd899fddffe35d
M: 560764d15cad022d0d83286d6a83f6aa880cd0e9 192.168.153.12:7002
slots: (0 slots) master
replicates fa0fcc6e09c5dca5824f23f0b012b1eb3efe247b
M: b6454920091c772bb82f166683fd899fddffe35d 192.168.153.11:7003
slots:0-5460 (5461 slots) master
M: fa0fcc6e09c5dca5824f23f0b012b1eb3efe247b 192.168.153.11:7004
slots:10923-16383 (5461 slots) master
M: 2dc77357e6fb97f15a0fa03ab43e796ed8fb2e2a 192.168.153.11:7005
slots: (0 slots) master
replicates 60aa133262cd817fa729cc2c1103a25e3a9b2311
[OK] All nodes agree about slots configuration.
>>> Check for open slots...
>>> Check slots coverage...
[OK] All 16384 slots covered.集群認證
測試 Redis 集群比較簡單的辦法就是使用 redis-rb-cluster 或者 redis-cli 。註意端口變化
[root@cs6 ~]# redis-cli -h 192.168.153.12 -c -p 7000
192.168.153.12:7000> set foo bar
-> Redirected to slot [12182] located at 192.168.153.11:7004
OK
192.168.153.11:7004> set hello world
-> Redirected to slot [866] located at 192.168.153.11:7003
OK
192.168.153.11:7003> get foo
-> Redirected to slot [12182] located at 192.168.153.11:7004
"bar"
192.168.153.11:7004> get hello
-> Redirected to slot [866] located at 192.168.153.11:7003
"world"Redis cluster 簡單搭建