Redis主从服务器同步搭建(基础篇)
本例实验的环境如下：
Linux redis1 2.6.32-642.11.1.el6.x86_64
主服务器IP:192.168.0.227
从服务器IP:192.168.0.228
Redis 3.2.8下载地址: http://download.redis.io/releases/redis-3.2.8.tar.gz
yum源使用阿里云
声明：本实例仅仅为redis主从服务器同步的实现，由于博主也是首次接触redis，对redis.conf配置参数仍未有过多了解，参数优化会在了解redis.conf配置文件试验后补充更新
以下命令主、从服务器都需要执行：
先确定时间设置是否正确
[root@redis1 ~]# date
时间不正确的话对时间进行修改
[root@redis1 ~]# date -s “20170323 1200”
安装基础软件包
[root@redis1 ~]# yum install -y gcc gcc-c++ make
先创建redis相关目录
[root@redis1 ~]# mkdir -p /usr/local/redis/{etc,bin,var}
[root@redis1 ~]# mkdir -p /data/logs/redis/data/dbcache
解压及安装redis
[root@redis1 ~]# tar xzvf redis-3.2.8.tar.gz
[root@redis1 ~]# cd redis-3.2.8
[root@redis1 redis-3.2.8]# make
[root@localhost redis-3.2.8]# cd src && cp redis-server redis-cli redis-benchmark /usr/local/redis/bin
[root@localhost redis-3.2.8]# cp -a redis.conf /usr/local/redis/etc
[root@redis1 redis-3.2.8]# cd /usr/local/redis
[root@redis1 redis]# vim etc/redis.conf
主服务器配置文件内容修改如下：
daemonize no 改为 daemonize yes
pidfile /var/run/redis_6379.pid 改为 pidfile /usr/local/redis/var/redis_master.pid
# bind 127.0.0.1 ::1 改为 bind 0.0.0.0
bind 127.0.0.1 改为 #bind 127.0.0.1
# unixsocket /tmp/redis.sock 改为 unixsocket /usr/local/redis/var/redis.sock
# unixsocketperm 700 改为unixsocketperm 755#timeout 0 改为 timeout300
loglevel notice改为 loglevel verbose
logfile "" 改为 logfile"/data/logs/redis/redis.log"
dir ./ 改为 dir /data/logs/redis/data/dbcache
# requirepass foobared 改为 requirepass traumerei
把主服务器的redis.conf复制到从服务器的/usr/local/redis/etc目录下，并修改以下内容：
# slaveof
测试
主从服务器都执行以下命令启动redis：
[root@localhost ~]# cd /usr/local/redis
[root@localhost redis]# bin/redis-server etc/redis.conf
启动之后执行以下命令查看服务器主从服务器连接状况：
[root@localhost redis]# tail -n 200 /data/logs/redis/redis.log
主服务器：
5196:M 23 Mar 15:23:50.830 * Increased maximumnumber of open files to 10032 (it was originally set to 1024).
_._
_.-``__ ''-._
_.-`` `. `_. ''-._ Redis 3.2.8(00000000/0) 64 bit
.-``.-```. ```\/ _.,_ ''-._
( ' , .-` | `, ) Running in standalone mode
|`-._`-...-`__...-.``-._|'` _.-'| Port: 6379
| `-._ `._ / _.-' | PID: 5196
`-._ `-._ `-./ _.-' _.-'
|`-._`-._ `-.__.-' _.-'_.-'|
| `-._`-._ _.-'_.-' | http://redis.io
`-._ `-._`-.__.-'_.-' _.-'
|`-._`-._ `-.__.-' _.-'_.-'|
| `-._`-._ _.-'_.-' |
`-._ `-._`-.__.-'_.-' _.-'
`-._ `-.__.-' _.-'
`-._ _.-'
`-.__.-'
5196:M 23 Mar 15:23:50.888 # WARNING: The TCPbacklog setting of 511 cannot be enforced because /proc/sys/net/core/somaxconnis set to the lower value of 128.
5196:M 23 Mar 15:23:50.888 # Server started, Redisversion 3.2.8
5196:M 23 Mar 15:23:50.888 # WARNINGovercommit_memory is set to 0! Background save may fail under low memorycondition. To fix this issue add 'vm.overcommit_memory = 1' to /etc/sysctl.confand then reboot or run the command 'sysctl vm.overcommit_memory=1' for this totake effect.
5196:M 23 Mar 15:23:50.889 * The server is nowready to accept connections on port 6379
5196:M 23 Mar 15:23:50.889 * The server is nowready to accept connections at /usr/local/redis/var/redis.sock
5196:M 23 Mar 15:24:06.279 - 0 clients connected (0slaves), 759720 bytes in use
5196:M 23 Mar 15:24:11.400 - 0 clients connected (0slaves), 759720 bytes in use
5196:M 23 Mar 15:24:13.596 - Accepted192.168.0.228:41013
5196:M 23 Mar 15:24:13.598 * Slave192.168.0.228:6379 asks for synchronization
5196:M 23 Mar 15:24:13.598 * Full resync requestedby slave 192.168.0.228:6379
5196:M 23 Mar 15:24:13.598 * Starting BGSAVE forSYNC with target: disk
5196:M 23 Mar 15:24:13.598 * Background savingstarted by pid 5232
5232:C 23 Mar 15:24:13.677 * DB saved on disk
5232:C 23 Mar 15:24:13.678 * RDB: 0 MB of memoryused by copy-on-write
5196:M 23 Mar 15:24:13.768 * Background savingterminated with success
5196:M 23 Mar 15:24:13.768 * Synchronization withslave 192.168.0.228:6379 succeeded
5196:M 23 Mar 15:24:16.565 - 0 clients connected (1slaves), 1829192 bytes in use
5196:M 23 Mar 15:24:21.658 - 0 clients connected (1slaves), 1829192 bytes in use
5196:M 23 Mar 15:24:26.728 - 0 clients connected (1slaves), 1829192 bytes in use
从服务器：
4915:S 23 Mar 15:23:24.354 * Increased maximumnumber of open files to 10032 (it was originally set to 1024).
_._
_.-``__ ''-._
_.-`` `. `_. ''-._ Redis 3.2.8(00000000/0) 64 bit
.-``.-```. ```\/ _.,_ ''-._
( ' , .-` | `, ) Running in standalone mode
|`-._`-...-`__...-.``-._|'` _.-'| Port: 6379
| `-._ `._ / _.-' | PID: 4915
`-._ `-._ `-./ _.-' _.-'
|`-._`-._ `-.__.-' _.-'_.-'|
| `-._`-._ _.-'_.-' | http://redis.io
`-._ `-._`-.__.-'_.-' _.-'
|`-._`-._ `-.__.-' _.-'_.-'|
| `-._`-._ _.-'_.-' |
`-._ `-._`-.__.-'_.-' _.-'
`-._ `-.__.-' _.-'
`-._ _.-'
`-.__.-'
4915:S 23 Mar 15:23:40.785 * Connecting to MASTER192.168.0.227:6379
4915:S 23 Mar 15:23:40.786 * MASTER <-> SLAVEsync started
4915:S 23 Mar 15:23:40.786 * Non blocking connectfor SYNC fired the event.
4915:S 23 Mar 15:23:40.786 * Master replied to PING,replication can continue...
4915:S 23 Mar 15:23:40.787 * Partialresynchronization not possible (no cached master)
4915:S 23 Mar 15:23:40.788 * Full resync frommaster: 4e4da19727bbc66115773dea75be329d04c24f13:1
4915:S 23 Mar 15:23:40.959 * MASTER <-> SLAVEsync: receiving 76 bytes from master
4915:S 23 Mar 15:23:40.959 * MASTER <-> SLAVEsync: Flushing old data
4915:S 23 Mar 15:23:40.959 * MASTER <-> SLAVEsync: Loading DB in memory
4915:S 23 Mar 15:23:40.959 * MASTER <-> SLAVEsync: Finished with success
4915:S 23 Mar 15:23:44.880 - 1 clients connected (0slaves), 780600 bytes in use
4915:S 23 Mar 15:23:49.944 - 1 clients connected (0slaves), 780608 bytes in use
4915:S 23 Mar 15:23:55.003 - 1 clients connected (0slaves), 780608 bytes in use
OK，没问题，主服务器执行以下命令
[root@localhost redis]# bin/redis-cli -a traumerei
127.0.0.1:6379> set name test
OK
127.0.0.1:6379> set age 44
OK
127.0.0.1:6379> save
OK
从服务器执行以下命令
[root@localhost redis]# bin/redis-cli -a traumerei
127.0.0.1:6379> get name
"test"
127.0.0.1:6379> get age
"44"
OK,这样就表明主从服务器数据同步正常，到此redis主从服务器初步同步配置就结束了