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  • redis集群搭建

    redis 从5开始 可以直接用redis-cli命令创建集群了,不用那么麻烦 安装ruby环境 

    redis配置文件需要修改的地方

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    port 7000
    cluster-enabled yes
    cluster-config-file nodes.7000.conf
    cluster-node-timeout 5000
    appendonly yes

    　　

    mkdir /usr/local/cluster

    cd /usr/local/cluster/

    cd cluster/

    mkdir 7000 7001 7002 7003 7004 7005

    cd 7000/

    cp /www/server/redis/redis.conf ./

    vim redis.conf   修改一个配置 然后复制到其他目录

    cp redis.conf ../7001/
    cp redis.conf ../7002/
    cp redis.conf ../7003/
    cp redis.conf ../7004/
    cp redis.conf ../7005/
    vim ../7001/redis.conf
    vim ../7002/redis.conf
    vim ../7003/redis.conf
    vim ../7004/redis.conf
    vim ../7005/redis.conf

    替换各自端口为其他的  vim 下 :%s/7000/7001/s

    vim start.sh  一个个启动太麻烦,脚本一次性启动

    复制代码
    #!/bin/bash

/www/server/redis/src/redis-server /usr/local/cluster/7000/redis.conf
/www/server/redis/src/redis-server /usr/local/cluster/7001/redis.conf
/www/server/redis/src/redis-server /usr/local/cluster/7002/redis.conf
/www/server/redis/src/redis-server /usr/local/cluster/7003/redis.conf
/www/server/redis/src/redis-server /usr/local/cluster/7004/redis.conf
/www/server/redis/src/redis-server /usr/local/cluster/7005/redis.conf
    复制代码

    chmod +x start.sh

    ./start.sh

    ps -ef|grep redis

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    [root@localhost cluster]# ps -ef|grep redis
    root     10279     1  0 11:46 ?        00:00:01 /www/server/redis/src/redis-server 0.0.0.0:7000 [cluster]
    root     10340     1  0 11:47 ?        00:00:01 /www/server/redis/src/redis-server 0.0.0.0:7001 [cluster]
    root     10346     1  0 11:47 ?        00:00:01 /www/server/redis/src/redis-server 0.0.0.0:7002 [cluster]
    root     10352     1  0 11:47 ?        00:00:01 /www/server/redis/src/redis-server 0.0.0.0:7003 [cluster]
    root     10358     1  0 11:47 ?        00:00:01 /www/server/redis/src/redis-server 0.0.0.0:7004 [cluster]
    root     10364     1  0 11:47 ?        00:00:01 /www/server/redis/src/redis-server 0.0.0.0:7005 [cluster]
    root     10945 21050  0 11:58 pts/2    00:00:00 grep --color=auto redis
    [root@localhost cluster]#

    　　

    启动集群

    redis-cli --cluster create 192.168.33.60:7000 192.168.33.60:7001 192.168.33.60:7002 192.168.33.60:7003 192.168.33.60:7004 192.168.33.60:7005 --cluster-replicas 1

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    root@localhost cluster]# redis-cli --cluster create 192.168.33.60:7000 192.168.33.60:7001 192.168.33.60:7002 192.168.33.60:7003 192.168.33.60:7004 192.168.33.60:7005 --cluster-replicas 1
    >>> Performing hash slots allocation on 6 nodes...
    Master[0] -> Slots 0 - 5460
    Master[1] -> Slots 5461 - 10922
    Master[2] -> Slots 10923 - 16383
    Adding replica 192.168.33.60:7004 to 192.168.33.60:7000
    Adding replica 192.168.33.60:7005 to 192.168.33.60:7001
    Adding replica 192.168.33.60:7003 to 192.168.33.60:7002
    >>> Trying to optimize slaves allocation for anti-affinity
    [WARNING] Some slaves are in the same host as their master
    M: 22df8c4f2763a3d40c5533893333608df1e0b792 192.168.33.60:7000
       slots:[0-5460] (5461 slots) master
    M: 4bdf950bbcaa37ff8aa159894c169b4c9fa0b056 192.168.33.60:7001
       slots:[5461-10922] (5462 slots) master
    M: 93a97e0e58375b38ff4639de2e597e1adb675b83 192.168.33.60:7002
       slots:[10923-16383] (5461 slots) master
    S: f68d2dde12b03b84251d69006d845cdfeaeaeb88 192.168.33.60:7003
       replicates 93a97e0e58375b38ff4639de2e597e1adb675b83
    S: 6e2feeb4ee991d69adae953d47932291bb174445 192.168.33.60:7004
       replicates 22df8c4f2763a3d40c5533893333608df1e0b792
    S: c0c7a26a69b09cad5d78e78c8d0c7eb327fbf8f5 192.168.33.60:7005
       replicates 4bdf950bbcaa37ff8aa159894c169b4c9fa0b056
    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 192.168.33.60:7000)
    M: 22df8c4f2763a3d40c5533893333608df1e0b792 192.168.33.60:7000
       slots:[0-5460] (5461 slots) master
       1 additional replica(s)
    S: f68d2dde12b03b84251d69006d845cdfeaeaeb88 192.168.33.60:7003
       slots: (0 slots) slave
       replicates 93a97e0e58375b38ff4639de2e597e1adb675b83
    S: 6e2feeb4ee991d69adae953d47932291bb174445 192.168.33.60:7004
       slots: (0 slots) slave
       replicates 22df8c4f2763a3d40c5533893333608df1e0b792
    S: c0c7a26a69b09cad5d78e78c8d0c7eb327fbf8f5 192.168.33.60:7005
       slots: (0 slots) slave
       replicates 4bdf950bbcaa37ff8aa159894c169b4c9fa0b056
    M: 93a97e0e58375b38ff4639de2e597e1adb675b83 192.168.33.60:7002
       slots:[10923-16383] (5461 slots) master
       1 additional replica(s)
    M: 4bdf950bbcaa37ff8aa159894c169b4c9fa0b056 192.168.33.60:7001
       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.
    [root@localhost cluster]#

    　　

    查看集群状态 

    redis-cli -h 127.0.0.1 -c -p 7000 info replication

    redis-cli -h 127.0.0.1 -c -p 7001 info replication

    redis-cli -h 127.0.0.1 -c -p 7002 info replication

    redis-cli -h 127.0.0.1 -c -p 7003 info replication

    redis-cli -h 127.0.0.1 -c -p 7004 info replication

    redis-cli -h 127.0.0.1 -c -p 7005 info replication

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    [root@localhost logs]# redis-cli -h 127.0.0.1 -c -p 7002 info replication
    # Replication
    role:master
    connected_slaves:1
    slave0:ip=192.168.33.60,port=7003,state=online,offset=1344,lag=0
    master_replid:f1b66456b6204b293b39702faea1dee558929070
    master_replid2:0000000000000000000000000000000000000000
    master_repl_offset:1344
    second_repl_offset:-1
    repl_backlog_active:1
    repl_backlog_size:1048576
    repl_backlog_first_byte_offset:1
    repl_backlog_histlen:1344

    　　

    结果 0 1 2 为主 3 4 5 为从 

    现在kill掉0 试试

    kill之前我看了 4是从

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    [root@localhost logs]# redis-cli -h 127.0.0.1 -c -p 7004 info replication
    # Replication
    role:slave
    master_host:192.168.33.60
    master_port:7000
    master_link_status:up
    master_last_io_seconds_ago:4
    master_sync_in_progress:0
    slave_repl_offset:1330
    slave_priority:100
    slave_read_only:1
    connected_slaves:0
    master_replid:4d2c448c8477544dccfa20b248ce37351a725293
    master_replid2:0000000000000000000000000000000000000000
    master_repl_offset:1330
    second_repl_offset:-1
    repl_backlog_active:1
    repl_backlog_size:1048576
    repl_backlog_first_byte_offset:1
    repl_backlog_histlen:1330

    　　

    kill之后 在看 4变成主了

    [root@localhost logs]# redis-cli -h 127.0.0.1 -c -p 7004 info replication
    # Replication
    role:master
    connected_slaves:0
    master_replid:ddf63dedae765e3612002687217d63b20c7356ab
    master_replid2:4d2c448c8477544dccfa20b248ce37351a725293
    master_repl_offset:1470
    second_repl_offset:1471
    repl_backlog_active:1
    repl_backlog_size:1048576
    repl_backlog_first_byte_offset:1
    repl_backlog_histlen:1470

    设置值 连接7001 

    127.0.0.1:7003> set name wang
    -> Redirected to slot [5798] located at 192.168.33.60:7001
    OK
    192.168.33.60:7001>

    7002上get 

    127.0.0.1:7002> get name
    -> Redirected to slot [5798] located at 192.168.33.60:7001
    "wang"
    192.168.33.60:7001>

    https://www.jianshu.com/p/a1e62e78667c

    https://segmentfault.com/a/1190000017151802

     
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  • 原文地址：https://www.cnblogs.com/lovezbs/p/14055426.html
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