redis-cluster
實驗環境:
centos6.5 IP:192.168.1.11
依賴包:redis ruby rubygem
[root@localhost redis]#tar xf redis-3.0.2.tar.gz
[root@localhost redis]#cd redis-3.0.2
[root@localhost redis]#make &&make install
用tab鍵看redis- 這些工具是否安裝好,沒安裝則cp到/usr/local/bin下
[root@localhost redis]#which redis-cli
[root@localhost redis]#cp /root/redis-3.0.2/src/redis-trib.rb /usr/local/bin/redis-trib
[root@localhost redis]#mkdir /usr/local/redis
[root@localhost redis]#cd /usr/local/redis/
[root@localhost redis]#mkdir `seq 7001 7008`
[root@localhost redis]# cp ~/redis-3.0.2/redis.conf ./
[root@localhost redis]# ls
7001 7002 7003 7004 7005 7006 7007 7008 redis.conf
配置文件裏,這三行配置:
daemonize yes//後臺掛起
cluster-enabled yes//開啓集羣
cluster-config-file nodes-7001.conf//集羣節點配置文件
cluster-node-timeout 5000//超時時間,毫秒
appendonly yes並且appendonly要開啓:
requirepass "abc" #集羣加密碼,一般是集羣配置完後用到
masterauth "abc"
for批量修改:
for i in {7001..7008};do sed "s/6379/$i/" redis.conf >$i/redis.conf;done
for批量啓動:
for i in {7001..7008};do cd /usr/local/redis/$i&&redis-server redis.conf ;done
[root@localhost 7008]# ps aux|grep redis//查看redis啓動狀態
聯網 yum -y install ruby rubygems 建議用yum吧,用源碼弄了半天弄不好
[root@localhost 7001]# gem install redis安裝ruby的redis接口
接下來就是redis-trib 工具出場了:
[root@localhost redis]# redis-trib help//查看能否使用
[root@localhost redis]# redis-trib create --replicas 1 192.168.1.11:7001 192.168.1.11:7002 192.168.1.11:7003 192.168.1.11:7004 192.168.1.11:7005 192.168.1.11:7006
Can I set the above configuration? (type 'yes' to accept): yes //這裏輸入yes
#--replicas 1 代表複製一份,即每個主一個從
#redis cluster最低要求三個主, 定義是host1:port host2:port
#如果--replicas 2則:
#host1:port == master host2:port &host3:port
host1 是host2 和host3的主
如果是創建9個是節點 --replicas 2 a b c d e f g h i 則,d e 是a的從,f g是b的從 h i是c的從
[root@localhost redis]# redis-cli -c -h 127.0.0.1 -p 7001#連接7001,
127.0.0.1:7001> cluster nodes#查看集羣節點
127.0.0.1:7001> cluster info#查看集羣信息
cluster_state:ok
集羣擴容
[root@localhost redis]# redis-trib add-node 192.168.1.11:7007 192.168.1.11:7001
redis-trib add-node 要加的節點 現有的任意節點
M: ff2b5205f2c1531422052a7c4c4feca3db046878 192.168.1.11:7001
slots:0-5460 (5461 slots) master
1 additional replica(s)
S: ef4ed8963e868ed9befa2fc25049039d270f7dbe 192.168.1.11:7005
slots: (0 slots) slave
replicates 721b0611a6a8a6e027d6619091a747b05a0529c2
S: 1538fe39b9694912c80024fc2bfcacde9ddbfb47 192.168.1.11:7004
slots: (0 slots) slave
replicates ff2b5205f2c1531422052a7c4c4feca3db046878
M: 721b0611a6a8a6e027d6619091a747b05a0529c2 192.168.1.11:7002
slots:5461-10922 (5462 slots) master
1 additional replica(s)
M: ef07b1bbb70392b4ac57f7d80a0f4ae7a13643f7 192.168.1.11:7003
slots:10923-16383 (5461 slots) master
1 additional replica(s)
S: 0d2e18cbbc2d6abd9cd72e554c8b7484fb089ccb 192.168.1.11:7006
slots: (0 slots) slave
replicates ef07b1bbb70392b4ac57f7d80a0f4ae7a13643f7
[root@localhost redis]# redis-cli -c -h 127.0.0.1 -p 7001
127.0.0.1:7001> cluster info
cluster_state:ok
cluster_slots_assigned:16384
...
127.0.0.1:7001> cluster nodes
ef4ed8963e868ed9befa2fc25049039d270f7dbe 192.168.1.11:7005 slave 721b0611a6a8a6e027d6619091a747b05a0529c2 0 1486917802211 5 connected
1538fe39b9694912c80024fc2bfcacde9ddbfb47 192.168.1.11:7004 slave ff2b5205f2c1531422052a7c4c4feca3db046878 0 1486917801707 4 connected
78a65dcd0b5165ecdab3ab2320bf975a35a66cf9 192.168.1.11:7007 master - 0 1486917802714 0 connected
ff2b5205f2c1531422052a7c4c4feca3db046878 192.168.1.11:7001 myself,master - 0 0 1 connected 0-5460
721b0611a6a8a6e027d6619091a747b05a0529c2 192.168.1.11:7002 master - 0 1486917801202 2 connected 5461-10922
ef07b1bbb70392b4ac57f7d80a0f4ae7a13643f7 192.168.1.11:7003 master - 0 1486917803218 3 connected 10923-16383
0d2e18cbbc2d6abd9cd72e554c8b7484fb089ccb 192.168.1.11:7006 slave ef07b1bbb70392b4ac57f7d80a0f4ae7a13643f7 0 1486917801202 6 connected
前一大串是節點裏的ID,新上來的節點沒有槽位,得重新分片:
[root@localhost redis]# redis-trib reshard 192.168.1.11:7007//對7007分片
How many slots do you want to move (from 1 to 16384)?1000 //給7007分1000槽位
What is the receiving node ID? //接受節點的ID,這裏複製7007的ID過來
Source node #1:all//從源節點過來
添加7008給7007做從
[[email protected]]# redis-trib add-node 192.168.1.11:7008 192.168.1.11:7001
[root@localhost redis]# redis-cli -c -p 7008//進入7008節點
127.0.0.1:7008> cluster nodes//查看節點,現在他還是主
127.0.0.1:7008> cluster replicate 78a65dcd0b5165ecdab3ab2320bf975a35a66cf9
OK//複製7007的ID過來
127.0.0.1:7008> cluster nodes//現在就變爲7007的從了
刪除節點:
[root@localhost redis]# redis-trib del-node 192.168.1.11:7008 6a8a8c8a4c9640d2cda682de85ac9b83b837e2cd
redis-trib del-ode 主機:端口 ID
查看節點以及槽位:
[root@localhost redis]# redis-trib check 192.168.1.11:7001
轉移槽位:如果要刪除主,則需要把槽位給刪了在刪除節點。
[root@localhost 7009]# redis-trib reshard 192.168.1.11:7002
How many slots do you want to move (from 1 to 16384)?
需要移動的數目:
What is the receiving node ID?
接受這些槽位的ID//目標節點
Source node #1:
從何處移到上面所指定的ID //源節點
Source node #2:done//結束
[root@localhost redis]# pkill redis//關閉所有redis,
可以看到redis-trib.rb具有以下功能:
1、create:創建集羣
2、check:檢查集羣
3、info:查看集羣信息
4、fix:修復集羣
5、reshard:在線遷移slot
6、rebalance:平衡集羣節點slot數量
7、add-node:將新節點加入集羣
8、del-node:從集羣中刪除節點
9、set-timeout:設置集羣節點間心跳連接的超時時間
10、call:在集羣全部節點上執行命令
11、import:將外部redis數據導入集羣
redis-sentinel
IP分佈:
reids master 192.168.1.11 6379
reids slalve 192.168.1.11 6380
reids slave 192.168.1.11 6381
reids sentinel 192.168.1.11 26379
先啓動所有reids,(修改好配置,配置好主從)
redis-server /usr/local/redis/6379/redis.conf &
redis-server /usr/local/redis/6380/redis.conf &
redis-server /usr/local/redis/6381/redis.conf &
[root@localhost 6379]# ps aux|grep redis
root 17151 0.1 0.5 137436 2736 pts/0 Sl 07:43 0:00 redis-server *:6379
root 17165 0.2 0.5 137436 2680 pts/0 Sl 07:43 0:00 redis-server *:6381
root 17204 0.2 0.5 137436 2636 pts/0 Sl 07:45 0:00 redis-server *:6380
cp /root/redis-3.0.0-rc2/sentinel.conf /usr/local/redis/
vi /usr/local/redis/sentinel.conf#一份配置文件可以配置多個羣集組
sentinel monitor mymaster 192.168.7.40 6379 1
#監聽的羣集,1代表一個slave節點ping不通,則認爲master宕機
sentinel down-after-milliseconds mymaster 5000
#sentinel向master發送ping,多長時間內沒通則認爲宕機。單位爲毫秒
sentinel failover-timeout mymaster 900000
#failover後,如果此時間內沒有任何failover操作,則默認爲failover失敗
sentinel parallel-syncs mymaster 2
#最多有多少個slave對新master進行同步###mymaster可以自己定義
sentinel can-failover def_master yes
#sentinel是否實施failover,no則只參與投票,不實施failover
redis-server /usr/local/redis/sentinel.conf --sentinel &啓動sentinel
[root@localhost 6379]# ps aux|grep redis
root 17151 0.1 0.4 137436 2448 pts/0 Sl 07:43 0:02 redis-server *:6379
root 17165 0.1 0.5 137436 2536 pts/0 Sl 07:43 0:02 redis-server *:6381
root 17172 0.3 0.4 137436 2436 pts/0 Sl 07:43 0:05 redis-server *:26379 [sentinel]
root 17204 0.1 0.5 137436 2488 pts/0 Sl 07:45 0:02 redis-server *:6380
root 17419 0.0 0.1 103216 772 pts/0 S+ 08:08 0:00 grep redis
[root@localhost 6379]# redis-cli -p 26379 info sentinel查看sentinel信息
# Sentinel
sentinel_masters:1
sentinel_tilt:0
sentinel_running_scripts:0
sentinel_scripts_queue_length:0
master0:name=mymaster,status=ok,address=127.0.0.1:6381,slaves=2,sentinels=1 #紅色部分爲master
[root@localhost 6379]# redis-cli -p 26379 sentinel slaves mymaster查看集羣從節點
[root@localhost ~]# redis-cli -p 6379 info Replication查看單個節點的角色
故障演示: (自行完成),當主宕機後,從代替,主恢復後,變成新主的從。
恢復數據:先把redis關掉,然後把.aof和.rdb結尾的文件導入配置文件目錄下。啓動redis