redis集群搭建

redis

redis下載安裝

cd tmp
mkdir frank
cd frank
mkdir redis
cd redis
wget http://download.redis.io/releases/redis-4.0.1.tar.gz
tar xzf redis-4.0.1.tar.gz
cd redis-4.0.1
make && make install

redis查看容达，關(guān)閉,卸載

查看

ps aux|grep redis

關(guān)閉

redis-cli shutdown 
or redis-cli -h 127.0.0.1 -p 6379 shutdown 
or kill -9 10654

卸載

rm -rf /usr/local/bin/redis*
rm -rf /tmp/frank/redis/redis-4.0.1

啟動redis服務(wù)

redis-server

啟動redis客戶端

redis-cli or redis-cli -h 127.0.0.1 -p 6379

ruby

安裝需要的Package

# yum -y install gcc

# yum -y install gcc-c++

# yum -y install zlib zlib-devel

# yum -y install readline readline-devel

# yum -y install openssl openssl-devel

最好是 #yum install gcc gcc-c++ openssl* readline* ncurses* zlib* libxml* libjpeg* libpng* libxslt* libtool*

ruby下載安裝

cd tmp
mkdir frank
cd frank
mkdir ruby
cd ruby
wget https://cache.ruby-lang.org/pub/ruby/2.4/ruby-2.4.2.tar.gz
tar xzf ruby-2.4.2.tar.gz
cd ruby-2.4.2
./configure
make && make install

安裝redis接口,gem未ruby下的一個工具包

gem install redis

1.問題1

ERROR:  Loading command: install (LoadError)
    cannot load such file -- zlib
ERROR:  While executing gem ... (NoMethodError)
    undefined method `invoke_with_build_args' for nil:NilClass

解決：

# 進(jìn)入ruby源碼文件夾 
# 安裝ruby自身提供的zlib包 
cd ext/zlib
ruby ./extconf.rb
make
make install

搭建redis集群

環(huán)境

redis 采用 redis-3.2.1 版本扒袖。

服務(wù)器CentOS7.0 兩臺（IP:116.196.65.198）麻养，（IP:47.52.41.245）

在兩臺服務(wù)器上美尸，下載安裝redis在tmp/frank/redis目錄下

cd /tmp
mkdir frank
cd frank
mkdir redis
wget http://download.redis.io/releases/redis-3.2.1.tar.gz
tar -zxvf redis-3.2.1.tar.gz　
cd redis-3.2.1
make && make install

將 redis安裝目錄下面的src目錄下面的redis-trib.rb 復(fù)制到 /usr/local/bin 目錄下

cd src
cp redis-trib.rb /usr/local/bin/

創(chuàng)建 Redis 節(jié)點

分別在兩臺服務(wù)器上redis安裝目錄下創(chuàng)建 redis_cluster 目錄；

mkdir redis_cluster

在116.196.65.198服務(wù)器上面的redis_cluster目錄下面創(chuàng)建名為7000侦高、7001、7002的目錄厌杜，并將 redis.conf 拷貝到這三個目錄中

cd redis_cluster 
mkdir 7000 7001 7002
cd ..
cp redis.conf redis_cluster/7000
cp redis.conf redis_cluster/7001
cp redis.conf redis_cluster/7002

分別修改這三個配置文件奉呛，修改如下內(nèi)容

port  7000                                        //端口7000,7002,7003    protected-mode no                               //關(guān)掉保護(hù)模式3.2之后 不然會報Sorry, can't connect to node
#bind 本機ip                                       //默認(rèn)ip為127.0.0.1，在3.2之后要注釋掉 daemonize    yes                               //redis后臺運行
pidfile  /var/run/redis_7000.pid          //pidfile文件對應(yīng)7000,7001,7002
cluster-enabled  yes                           //開啟集群  把注釋#去掉
cluster-config-file  nodes_7000.conf   //集群的配置  配置文件首次啟動自動生成 7000,7001,7002
cluster-node-timeout  15000                //請求超時  默認(rèn)15秒夯尽，可自行設(shè)置
appendonly  yes                           //aof日志開啟  有需要就開啟瞧壮，它會每次寫操作都記錄一條日志

接著在另外一臺機器上（47.52.41.245），的操作重復(fù)以上三步匙握，只是把目錄改為7003咆槽、7004、7005圈纺，對應(yīng)的配置文件也按照這個規(guī)則修改即可

啟動各個節(jié)點

#第一臺機器上執(zhí)行即116.196.65.198
redis-server redis_cluster/7000/redis.conf
redis-server redis_cluster/7001/redis.conf
redis-server redis_cluster/7002/redis.conf
 
#另外一臺機器上執(zhí)行即47.52.41.245
redis-server redis_cluster/7003/redis.conf
redis-server redis_cluster/7004/redis.conf
redis-server redis_cluster/7005/redis.conf

檢查 redis 啟動情況

ps -ef | grep redis

root      2138     1  0 13:57 ?        00:00:01 redis-server *:7003 [cluster]
root      2142     1  0 13:57 ?        00:00:01 redis-server *:7004 [cluster]
root      2146     1  0 13:57 ?        00:00:01 redis-server *:7005 [cluster]
root      2185  2119  0 14:20 pts/0    00:00:00 grep --color=auto redis


netstat -tnlp | grep redis

tcp        0      0 0.0.0.0:17003           0.0.0.0:*               LISTEN      2138/redis-server * 
tcp        0      0 0.0.0.0:17004           0.0.0.0:*               LISTEN      2142/redis-server * 
tcp        0      0 0.0.0.0:17005           0.0.0.0:*               LISTEN      2146/redis-server * 
tcp        0      0 0.0.0.0:7003            0.0.0.0:*               LISTEN      2138/redis-server * 
tcp        0      0 0.0.0.0:7004            0.0.0.0:*               LISTEN      2142/redis-server * 
tcp        0      0 0.0.0.0:7005            0.0.0.0:*               LISTEN      2146/redis-server * 
tcp6       0      0 :::17003                :::*                    LISTEN      2138/redis-server * 
tcp6       0      0 :::17004                :::*                    LISTEN      2142/redis-server * 
tcp6       0      0 :::17005                :::*                    LISTEN      2146/redis-server * 
tcp6       0      0 :::7003                 :::*                    LISTEN      2138/redis-server * 
tcp6       0      0 :::7004                 :::*                    LISTEN      2142/redis-server * 
tcp6       0      0 :::7005                 :::*                    LISTEN      2146/redis-server *

創(chuàng)建集群

Redis 官方提供了 redis-trib.rb 這個工具秦忿，就在解壓目錄的 src 目錄中，第三步中已將它復(fù)制到 /usr/local/bin 目錄中蛾娶，可以直接在命令行中使用了灯谣。使用下面這個命令即可完成安裝

redis-trib.rb create --replicas 1 116.196.65.198:7000 116.196.65.198:7001 116.196.65.198:7002 47.52.41.245:7003 47.52.41.245:7004 47.52.41.245:7005

其中，前三個 ip:port 為第一臺機器的節(jié)點茫叭，剩下三個為第二臺機器酬屉。

這個工具是用 ruby 實現(xiàn)的，所以需要安裝 ruby揍愁。安裝命令如下：

yum -y install ruby ruby-devel rubygems rpm-build

gem install redis

或者按上面的流程安裝ruby

之后再運行 redis-trib.rb 命令呐萨，會出現(xiàn)如下提示：

redis-trib.rb create --replicas 1 116.196.65.198:7000 116.196.65.198:7001 116.196.65.198:7002 47.52.41.245:7003 47.52.41.245:7004 47.52.41.245:7005

###出現(xiàn)下面這些代表成功

>>> Creating cluster
>>> Performing hash slots allocation on 6 nodes...
Using 3 masters:
116.196.65.198:7000
47.52.41.245:7003
116.196.65.198:7001
Adding replica 47.52.41.245:7004 to 116.196.65.198:7000
Adding replica 116.196.65.198:7002 to 47.52.41.245:7003
Adding replica 47.52.41.245:7005 to 116.196.65.198:7001
M: 33d50636b5235de9970de2da75901b642d2b14d2 116.196.65.198:7000
   slots:0-5460 (5461 slots) master
M: 668397aba571ece85532b1eb1fccb42e4e33b1f2 116.196.65.198:7001
   slots:10923-16383 (5461 slots) master
S: 908430b2bf63669898e9eaef79dd6c1b33c8c57a 116.196.65.198:7002
   replicates cc86a24f3896ad7530e2687cf52582912f74b661
M: cc86a24f3896ad7530e2687cf52582912f74b661 47.52.41.245:7003
   slots:5461-10922 (5462 slots) master
S: 3a0b27e2e34e72430ce41bb78f6d207579175306 47.52.41.245:7004
   replicates 33d50636b5235de9970de2da75901b642d2b14d2
S: ca60de73e15c19a9aa45da508d270a5781a76724 47.52.41.245:7005
   replicates 668397aba571ece85532b1eb1fccb42e4e33b1f2
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 116.196.65.198:7000)
M: 33d50636b5235de9970de2da75901b642d2b14d2 116.196.65.198:7000
   slots:0-5460 (5461 slots) master
M: 668397aba571ece85532b1eb1fccb42e4e33b1f2 116.196.65.198:7001
   slots:10923-16383 (5461 slots) master
M: 908430b2bf63669898e9eaef79dd6c1b33c8c57a 116.196.65.198:7002
   slots: (0 slots) master
   replicates cc86a24f3896ad7530e2687cf52582912f74b661
M: cc86a24f3896ad7530e2687cf52582912f74b661 47.52.41.245:7003
   slots:5461-10922 (5462 slots) master
M: 3a0b27e2e34e72430ce41bb78f6d207579175306 47.52.41.245:7004
   slots: (0 slots) master
   replicates 33d50636b5235de9970de2da75901b642d2b14d2
M: ca60de73e15c19a9aa45da508d270a5781a76724 47.52.41.245:7005
   slots: (0 slots) master
   replicates 668397aba571ece85532b1eb1fccb42e4e33b1f2
[OK] All nodes agree about slots configuration.
>>> Check for open slots...
>>> Check slots coverage...
[OK] All 16384 slots covered.

集群驗證
在第一臺機器上連接集群的7002端口的節(jié)點，在另外一臺連接7005節(jié)點莽囤，連接方式為 redis-cli -h 116.196.65.198 -c -p 7002 ,加參數(shù) -C 可連接到集群谬擦，因為上面 redis.conf 將 bind 改為了ip地址，所以 -h 參數(shù)不可以省略朽缎。

####鏈接116.196.65.198:7002存入 鍵jiqun 值chenggong
[root@iZj6c7eeosj2t5vjw8rf4xZ redis-3.2.1]# redis-cli -h 116.196.65.198 -c -p 7002
116.196.65.198:7002> set jiqun chenggong
-> Redirected to slot [8235] located at 47.52.41.245:7003
OK
47.52.41.245:7003> 

####鏈接47.52.41.245:700取出 鍵jiqun 的值
[root@jdu4e00u53f7 redis-3.2.1]# redis-cli -h 47.52.41.245 -c -p 7005
47.52.41.245:7005> get jiqun
-> Redirected to slot [8235] located at 47.52.41.245:7003
"chenggong"
47.52.41.245:7003>

可能出現(xiàn)問題

Sorry, can't connect to node

解決方案：

首先檢查服務(wù)器端口是否開發(fā)惨远，阿里，京東等服務(wù)器需要在安全組里面開發(fā)
端口话肖，直接在服務(wù)器里面用命令開發(fā)端口是無效的北秽。其次在redis.config配置文件里面關(guān)閉保護(hù)模式和注釋掉bin

[ERR] Node 172.168.63.202:7001 is not empty. Either the nodealready knows other nodes (check with CLUSTER NODES) or contains some
解決方案：

1)、將需要新增的節(jié)點下aof最筒、rdb等本地備份文件刪除贺氓；

2)、同時將新Node的集群配置文件刪除,即：刪除你redis.conf里面cluster-config-file所在的文件床蜘；

3)辙培、再次添加新節(jié)點如果還是報錯蔑水，則登錄新Node,./redis-cli –h x –p對數(shù)據(jù)庫進(jìn)行清除：

116.196.65.198:7000> flushdb #清空當(dāng)前數(shù)據(jù)庫

4)，重啟服務(wù)器扬蕊，或者重啟redis

Waiting for the cluster to join 一直等待