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注意事项：
1.如果是使用redis-trib.rb工具构建集群，集群构建完成前不要配置密码，集群构建完毕再通过config set + config rewrite命令逐个机器设置密码
2.如果对集群设置密码，那么requirepass和masterauth都需要设置，否则发生主从切换时，就会遇到授权问题，可以模拟并观察日志
3.各个节点的密码都必须一致，否则Redirected就会失败
config set masterauth 123456
config set requirepass 123456
config rewrite
三主三从
2.在三台服务器上分别启动redis
分别在每台服务器上部署redis，并启动起来
启动之前需要和redis单机安装不同的的配置文件参数不一样
vi /opt/redids/conf/配置文件
database 1 #默认有16个库选择一个
cluster-enabled yes #开启集群
cluster-config-file #/opt/redis/conf/nodes.conf #开启集群的时候自动生成和redis的配置文件没有任何关系
appendonly yes #开启持久化存储
3.启动所有的redis服务，启动以后只能说明启动但是6台服务器还未构成集群#参考单机部署
4.集群工作
1.yum -y install ruby rubygems
gem install redis
cp /root/redis-3.2.2/src/redis-trib.rb /opt/redis/bin/ #redis bin 目录已经在环境变量了
redis-trib.rb create --replicas 1 IP1:6379 IP2:6379 IP3:6379 IP4:6379 IP5:6379 IP6 :6379
--replicas 1 是指一个主节点有个备节点 就是说三主三被
结束以后会发现/opt/redis/conf/nodes.conf 里面已经生成了集群的信息
5.查看集群的状态
redis-cli -h IP cluster nodes
6.设置key value 手动验证
具体实验步骤
说明：视频上用的是
192.168.1.0/24 我自己用的是 192.168.56.0/24 网段
redis 集群的通讯的端口默认是服务端口加上10000
1.所有机器 停止selinux 和 iptables （iptables 有的话端口允许）（all）
yum -y install gcc ctl
2.每台服务器都上传reids(all)
[root@localhost src]# pwd
/usr/local/src
[root@localhost src]# ls
redis-3.0.6.tar.gz
[root@localhost src]#
3.创建目录(all)
mkdir /usr/local/redis3 -p
4.安装
cd /usr/local/src/
tar xf redis-3.0.6.tar.gz
cd redis-3.0.6
make PREFIX=/usr/local/redis3 install
5. 初始化操作
mkdir -p /usr/local/redis3/cluster/7111 #192.168.56.111
mkdir -p /usr/local/redis3/cluster/7112 #192.168.56.112
mkdir -p /usr/local/redis3/cluster/7113 #192.168.56.113
mkdir -p /usr/local/redis3/cluster/7114 #192.168.56.114
mkdir -p /usr/local/redis3/cluster/7115 #192.168.56.115
mkdir -p /usr/local/redis3/cluster/7116 #192.168.56.116
scp redis.conf 192.168.56.111:/usr/local/redis3/cluster/7111/redis-7111.conf
scp redis.conf 192.168.56.112:/usr/local/redis3/cluster/7112/redis-7112.conf
scp redis.conf 192.168.56.113:/usr/local/redis3/cluster/7113/redis-7113.conf
scp redis.conf 192.168.56.114:/usr/local/redis3/cluster/7114/redis-7114.conf
scp redis.conf 192.168.56.115:/usr/local/redis3/cluster/7115/redis-7115.conf
scp redis.conf 192.168.56.116:/usr/local/redis3/cluster/7116/redis-7116.conf
6.修改redis配置文件
vim /usr/local/redis3/cluster/7111/redis-7111.conf
daemonize yes
pidfile /var/run/redis-7111.pid #此处修改
port 7111
tcp-backlog 511
timeout 0
tcp-keepalive 0
loglevel notice
logfile ""
databases 1
save 900 1
save 300 10
save 60 10000
stop-writes-on-bgsave-error yes
rdbcompression yes
rdbchecksum yes
dbfilename dump.rdb
dir ./
slave-serve-stale-data yes
slave-read-only yes
repl-diskless-sync no
repl-diskless-sync-delay 5
repl-disable-tcp-nodelay no
slave-priority 100
appendonly yes
appendfilename "appendonly.aof"
appendfsync everysec
no-appendfsync-on-rewrite no
auto-aof-rewrite-percentage 100
auto-aof-rewrite-min-size 64mb
aof-load-truncated yes
lua-time-limit 5000
cluster-enabled yes
cluster-config-file /usr/local/redis3/cluster/7111/nodes.conf #此处修改
cluster-node-timeout 15000
cluster-migration-barrier 1
slowlog-log-slower-than 10000
slowlog-max-len 128
latency-monitor-threshold 0
notify-keyspace-events ""
hash-max-ziplist-entries 512
hash-max-ziplist-value 64
list-max-ziplist-entries 512
list-max-ziplist-value 64
set-max-intset-entries 512
zset-max-ziplist-entries 128
zset-max-ziplist-value 64
hll-sparse-max-bytes 3000
activerehashing yes
client-output-buffer-limit normal 0 0 0
client-output-buffer-limit slave 256mb 64mb 60
client-output-buffer-limit pubsub 32mb 8mb 60
hz 10
aof-rewrite-incremental-fsync yes
sed -i 's#7111#7116#g' redis-7116.conf 其余的配置文件拷贝过去 替换
7.启动所有的redis
/usr/local/redis3/bin/redis-server /usr/local/redis3/cluster/7111/redis-7111.conf
/usr/local/redis3/bin/redis-server /usr/local/redis3/cluster/7112/redis-7112.conf
/usr/local/redis3/bin/redis-server /usr/local/redis3/cluster/7113/redis-7113.conf
/usr/local/redis3/bin/redis-server /usr/local/redis3/cluster/7114/redis-7114.conf
/usr/local/redis3/bin/redis-server /usr/local/redis3/cluster/7115/redis-7115.conf
/usr/local/redis3/bin/redis-server /usr/local/redis3/cluster/7116/redis-7116.conf
检查所有服务的端口都已经启动
[root@localhost 7111]# netstat -lntup
Active Internet connections (only servers)
Proto Recv-Q Send-Q Local Address Foreign Address State PID/Program name
tcp 0 0 0.0.0.0:22 0.0.0.0:* LISTEN 1104/sshd
tcp 0 0 0.0.0.0:17111 0.0.0.0:* LISTEN 5379/redis-server *
tcp 0 0 127.0.0.1:25 0.0.0.0:* LISTEN 1603/master
tcp 0 0 0.0.0.0:7111 0.0.0.0:* LISTEN 5379/redis-server *
tcp6 0 0 :::22 :::* LISTEN 1104/sshd
tcp6 0 0 :::17111 :::* LISTEN 5379/redis-server *
tcp6 0 0 ::1:25 :::* LISTEN 1603/master
tcp6 0 0 :::7111 :::* LISTEN 5379/redis-server *
[root@localhost 7111]#
[root@localhost 7111]# ps -ef |grep redis
root 5379 1 0 08:13 ? 00:00:00 /usr/local/redis3/bin/redis-server *:7111 [cluster]
root 5410 5275 0 08:19 pts/0 00:00:00 grep --color=auto redis
[root@localhost 7111]#
8.创建集群
yum -y install ruby rubygems (all)
安装redis ruby的接口
gem install redis (all)
cd /usr/local/src/redis-3.0.6/src
cp redis-trib.rb /usr/local/bin/redis-trib
如果是如下创建的话可以看主 111，112，113 为master 114,115,116为slave，不符合要求
--replicas 1 表示一个master有一个slave
(创建命令在任意一台redis执行)
[root@localhost src]# redis-trib create --replicas 1 192.168.56.111:7111 192.168.56.112:7112 192.168.56.113:7113 192.168.56.114:7114 192.168.56.115:7115 192.168.56.116:7116
>>> Creating cluster
>>> Performing hash slots allocation on 6 nodes...
Using 3 masters:
192.168.56.111:7111
192.168.56.112:7112
192.168.56.113:7113
Adding replica 192.168.56.114:7114 to 192.168.56.111:7111
Adding replica 192.168.56.115:7115 to 192.168.56.112:7112
Adding replica 192.168.56.116:7116 to 192.168.56.113:7113
M: 8c1890f102a035a05836dd3a5621499d69ad97eb 192.168.56.111:7111
slots:0-5460 (5461 slots) master
M: f9455c930ac9a932ed9b4bcb2cb6d929ab912941 192.168.56.112:7112
slots:5461-10922 (5462 slots) master
M: 289acc8a4c879f9cd9ca40f29825dd67a64a71c8 192.168.56.113:7113
slots:10923-16383 (5461 slots) master
S: 28b18432a99ffc67f31e7b94f63199acae8bcc24 192.168.56.114:7114
replicates 8c1890f102a035a05836dd3a5621499d69ad97eb
S: 4fd1072ae882c2a9fc332c968a5888fa38b8435e 192.168.56.115:7115
replicates f9455c930ac9a932ed9b4bcb2cb6d929ab912941
S: d6f6fd5082874ee0ebe9a8bdc2575a1dcff23095 192.168.56.116:7116
replicates 289acc8a4c879f9cd9ca40f29825dd67a64a71c8
Can I set the above configuration? (type 'yes' to accept):
如果不符合要求的话
调整IP的顺序，创建完毕
(创建命令在任意一台redis执行)
[root@localhost src]# redis-trib create --replicas 1 192.168.56.111:7111 192.168.56.112:7112 192.168.56.113:7113 192.168.56.114:7114 192.168.56.115:7115 192.168.56.116:7116
>>> Creating cluster
>>> Performing hash slots allocation on 6 nodes...
Using 3 masters:
192.168.56.111:7111
192.168.56.112:7112
192.168.56.113:7113
Adding replica 192.168.56.114:7114 to 192.168.56.111:7111
Adding replica 192.168.56.115:7115 to 192.168.56.112:7112
Adding replica 192.168.56.116:7116 to 192.168.56.113:7113
M: 8c1890f102a035a05836dd3a5621499d69ad97eb 192.168.56.111:7111
slots:0-5460 (5461 slots) master
M: f9455c930ac9a932ed9b4bcb2cb6d929ab912941 192.168.56.112:7112
slots:5461-10922 (5462 slots) master
M: 289acc8a4c879f9cd9ca40f29825dd67a64a71c8 192.168.56.113:7113
slots:10923-16383 (5461 slots) master
S: 28b18432a99ffc67f31e7b94f63199acae8bcc24 192.168.56.114:7114
replicates 8c1890f102a035a05836dd3a5621499d69ad97eb
S: 4fd1072ae882c2a9fc332c968a5888fa38b8435e 192.168.56.115:7115
replicates f9455c930ac9a932ed9b4bcb2cb6d929ab912941
S: d6f6fd5082874ee0ebe9a8bdc2575a1dcff23095 192.168.56.116:7116
replicates 289acc8a4c879f9cd9ca40f29825dd67a64a71c8
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 192.168.56.111:7111)
M: 8c1890f102a035a05836dd3a5621499d69ad97eb 192.168.56.111:7111
slots:0-5460 (5461 slots) master
M: f9455c930ac9a932ed9b4bcb2cb6d929ab912941 192.168.56.112:7112
slots:5461-10922 (5462 slots) master
M: 289acc8a4c879f9cd9ca40f29825dd67a64a71c8 192.168.56.113:7113
slots:10923-16383 (5461 slots) master
M: 28b18432a99ffc67f31e7b94f63199acae8bcc24 192.168.56.114:7114
slots: (0 slots) master
replicates 8c1890f102a035a05836dd3a5621499d69ad97eb
M: 4fd1072ae882c2a9fc332c968a5888fa38b8435e 192.168.56.115:7115
slots: (0 slots) master
replicates f9455c930ac9a932ed9b4bcb2cb6d929ab912941
M: d6f6fd5082874ee0ebe9a8bdc2575a1dcff23095 192.168.56.116:7116
slots: (0 slots) master
replicates 289acc8a4c879f9cd9ca40f29825dd67a64a71c8
[OK] All nodes agree about slots configuration.
>>> Check for open slots...
>>> Check slots coverage...
[OK] All 16384 slots covered.
[root@localhost src]#
生辰文件的节点信息（all）
[root@localhost 7111]# ll
total 52
-rw-r--r--. 1 root root 0 Jun 3 08:13 appendonly.aof
-rw-r--r--. 1 root root 18 Jun 3 08:39 dump.rdb
-rw-r--r--. 1 root root 763 Jun 3 08:39 nodes.conf
-rw-r--r--. 1 root root 41584 Jun 3 08:03 redis-7111.conf
[root@localhost 7111]# pwd
/usr/local/redis3/cluster/7111
[root@localhost 7111]# cat nodes.conf
4fd1072ae882c2a9fc332c968a5888fa38b8435e 192.168.56.115:7115 slave f9455c930ac9a932ed9b4bcb2cb6d929ab912941 0 1496493590416 5 connected
f9455c930ac9a932ed9b4bcb2cb6d929ab912941 192.168.56.112:7112 master - 0 1496493588394 2 connected 5461-10922
d6f6fd5082874ee0ebe9a8bdc2575a1dcff23095 192.168.56.116:7116 slave 289acc8a4c879f9cd9ca40f29825dd67a64a71c8 0 1496493586373 3 connected
28b18432a99ffc67f31e7b94f63199acae8bcc24 192.168.56.114:7114 slave 8c1890f102a035a05836dd3a5621499d69ad97eb 0 1496493589405 4 connected
289acc8a4c879f9cd9ca40f29825dd67a64a71c8 192.168.56.113:7113 master - 0 1496493587385 3 connected 10923-16383
8c1890f102a035a05836dd3a5621499d69ad97eb 192.168.56.111:7111 myself,master - 0 0 1 connected 0-5460
vars currentEpoch 6 lastVoteEpoch 0
[root@localhost 7111]#
9验证redis集群（可以看出 redis集群生效 slot为第三个master的）
[root@localhost 7116]# cd /usr/local/redis3/
[root@localhost redis3]# ls
bin cluster
[root@localhost redis3]# ./bin/redis-cli -c -p 7116
127.0.0.1:7116> set liuhx sanlang'
Invalid argument(s)
127.0.0.1:7116> set liuhx sanlang
-> Redirected to slot [14006] located at 192.168.56.113:7113
OK
192.168.56.113:7113>
[root@localhost redis3]# ./bin/redis-cli -c -p 7111
127.0.0.1:7111> get liuhx
-> Redirected to slot [14006] located at 192.168.56.113:7113
"sanlang"
192.168.56.113:7113>
10.查看节点的状态信息
[root@localhost bin]# ./redis-cli -p 7114 cluster nodes
289acc8a4c879f9cd9ca40f29825dd67a64a71c8 192.168.56.113:7113 master - 0 1496494716960 3 connected 10923-16383
8c1890f102a035a05836dd3a5621499d69ad97eb 192.168.56.111:7111 master - 0 1496494716455 1 connected 0-5460
4fd1072ae882c2a9fc332c968a5888fa38b8435e 192.168.56.115:7115 slave f9455c930ac9a932ed9b4bcb2cb6d929ab912941 0 1496494719985 5 connected
f9455c930ac9a932ed9b4bcb2cb6d929ab912941 192.168.56.112:7112 master - 0 1496494718977 2 connected 5461-10922
28b18432a99ffc67f31e7b94f63199acae8bcc24 192.168.56.114:7114 myself,slave 8c1890f102a035a05836dd3a5621499d69ad97eb 0 0 4 connected
d6f6fd5082874ee0ebe9a8bdc2575a1dcff23095 192.168.56.116:7116 slave 289acc8a4c879f9cd9ca40f29825dd67a64a71c8 0 1496494717968 6 connected
[root@localhost bin]# pwd
/usr/local/redis3/bin
[root@localhost bin]#
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QQ群⑧：
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