Redis 主从搭建
目录一、redis主从库相同操作... 2
1. 创建分用户（用于启动redis）... 2
2. 切换到分用户环境... 2
3. 上传redis软件或者wget http://download.redis.io/releases/redis-3.2.6.tar.gz. 2
4. 解压缩redis文件并安装... 2
二、redis主库操作... 2
1. 修改redis的配置文件，将redis的配置文件修改成如下内容：... 2
2. 创建redis所需的日志文件以及存储数据所需的目录... 3
3. 启动redis. 3
三、redis从库操作... 4
1. 修改redis的配置文件，将redis的配置文件修改成如下内容：... 4
2. 创建redis所需的日志文件以及存储数据所需的目录... 6
3. 启动redis. 6
四、redis主从测试... 7
1. 主库写入数据... 7
2. 从库读取数据... 7
3. 主从库查看日志... 8
4. 主从库磁盘备份数据... 8
一、redis主从库相同操作
1. 创建分用户（用于启动redis）
# useradd redis
2. 切换到分用户环境
# sudo su – redis
3. 上传redis软件或者wget http://download.redis.io/releases/redis-3.2.6.tar.gz
$ rz -y
rz waitingto receive.
Startingzmodem transfer.Press Ctrl+C to cancel.
Transferringredis-3.2.6.tar.gz...
100% 1508 KB 1508 KB/sec 00:00:01 0 Errors
$ ls
redis-3.2.6.tar.gz
4. 解压缩redis文件并安装
$ mkdir run
$ tar zxf redis-3.2.6.tar.gz –C run/
$ cd run/redis-3.2.6/
[redis@Centos6redis-3.2.6]$ make
二、redis主库操作
1. 修改redis的配置文件，将redis的配置文件修改成如下内容：
$ egrep -v "^$|^#" run/redis-3.2.6/redis.conf
bind 10.0.0.189
protected-modeyes
port 16001
tcp-backlog511
timeout 0
tcp-keepalive300
daemonize yes
supervisedno
pidfile/var/run/redis_6379.pid
loglevelnotice
logfile "/home/redis/log/16001/redis-master.log"
databases16
save 900 1
save 30010
save 6010000
stop-writes-on-bgsave-erroryes
rdbcompressionyes
rdbchecksumyes
dbfilenamedump.rdb
dir /home/redis/data/16001/
slave-serve-stale-datayes
slave-read-onlyyes
repl-diskless-syncno
repl-diskless-sync-delay5
repl-disable-tcp-nodelayno
slave-priority100
appendonlyno
appendfilename"appendonly.aof"
appendfsynceverysec
no-appendfsync-on-rewriteno
auto-aof-rewrite-percentage100
auto-aof-rewrite-min-size64mb
aof-load-truncatedyes
lua-time-limit5000
slowlog-log-slower-than10000
slowlog-max-len128
latency-monitor-threshold0
notify-keyspace-events""
hash-max-ziplist-entries512
hash-max-ziplist-value64
list-max-ziplist-size-2
list-compress-depth0
set-max-intset-entries512
zset-max-ziplist-entries128
zset-max-ziplist-value64
hll-sparse-max-bytes3000
activerehashingyes
client-output-buffer-limitnormal 0 0 0
client-output-buffer-limitslave 256mb 64mb 60
client-output-buffer-limitpubsub 32mb 8mb 60
hz 10
aof-rewrite-incremental-fsyncyes
2. 创建redis所需的日志文件以及存储数据所需的目录
$ mkdir -p data/16001 log/16001
$ ln -s ~/run/redis-3.2.6 ~/run/redis
3. 启动redis
$ ~/run/redis/src/redis-server ~/run/redis/redis.conf
$ netstat-lantup|grep redis
(Not all processes could be identified, non-owned process info
will not be shown, youwould have to be root to see it all.)
tcp 0 0 10.0.0.189:16001 0.0.0.0:* LISTEN 8981/redis-server 1
$ catlog/16001/redis-master.log
8981:M 24Dec 15:26:44.340 # You requested maxclients of 10000 requiring at least 10032max file descriptors.
8981:M 24Dec 15:26:44.340 # Server can't set maximum open files to 10032 because of OSerror: Operation not permitted.
8981:M 24Dec 15:26:44.340 # Current maximum open files is 4096. maxclients has beenreduced to 4064 to compensate for low ulimit. If you need higher maxclientsincrease 'ulimit -n'.
_._
_.-``__ ''-._
_.-`` `.`_.''-._ Redis 3.2.6 (00000000/0) 64 bit
.-`` .-```. ```\/ _.,_ ''-._
( ' , .-` | `, ) Running in standalone mode
|`-._`-...-` __...-.``-._|'` _.-'| Port: 16001
| `-._ `._ / _.-' | PID: 8981
`-._ `-._`-./_.-' _.-'
|`-._`-._ `-.__.-' _.-'_.-'|
| `-._`-._ _.-'_.-' | http://redis.io
`-._ `-._`-.__.-'_.-' _.-'
|`-._`-._ `-.__.-' _.-'_.-'|
| `-._`-._ _.-'_.-' |
`-._ `-._`-.__.-'_.-' _.-'
`-._ `-.__.-' _.-'
`-._ _.-'
`-.__.-'
8981:M 24Dec 15:26:44.376 # WARNING: The TCP backlog setting of 511 cannot be enforcedbecause /proc/sys/net/core/somaxconn is set to the lower value of 128.
8981:M 24Dec 15:26:44.376 # Server started, Redis version 3.2.6
8981:M 24Dec 15:26:44.377 # WARNING overcommit_memory is set to 0! Background save mayfail under low memory condition. To fix this issue add 'vm.overcommit_memory =1' to /etc/sysctl.conf and then reboot or run the command 'sysctlvm.overcommit_memory=1' for this to take effect.
8981:M 24Dec 15:26:44.377 # WARNING you have Transparent Huge Pages (THP) supportenabled in your kernel. This will create latency and memory usage issues withRedis. To fix this issue run the command 'echo never >/sys/kernel/mm/transparent_hugepage/enabled' as root, and add it to your/etc/rc.local in order to retain the setting after a reboot. Redis must berestarted after THP is disabled.
8981:M 24Dec 15:26:44.377 * Theserver is now ready to accept connections on port 16001
三、redis从库操作
1. 修改redis的配置文件，将redis的配置文件修改成如下内容：
$cp -rf ~/run/redis-3.2.6 ~/run/redis-slave
$ egrep -v "^$|^#" run/redis-slave/redis.conf
bind10.0.0.189
protected-modeyes
port 16002
tcp-backlog511
timeout 0
tcp-keepalive300
daemonizeyes
supervisedno
pidfile/var/run/redis_6379.pid
loglevelnotice
logfile"/home/redis/log/16002/redis-slave.log"
databases16
save 900 1
save 30010
save 6010000
stop-writes-on-bgsave-erroryes
rdbcompressionyes
rdbchecksumyes
dbfilenamedump.rdb
dir/home/redis/data/16002/
slaveof 10.0.0.189 16001
slave-serve-stale-datayes
slave-read-onlyyes
repl-diskless-syncno
repl-diskless-sync-delay5
repl-disable-tcp-nodelayno
slave-priority100
appendonlyno
appendfilename"appendonly.aof"
appendfsynceverysec
no-appendfsync-on-rewriteno
auto-aof-rewrite-percentage100
auto-aof-rewrite-min-size64mb
aof-load-truncatedyes
lua-time-limit5000
slowlog-log-slower-than10000
slowlog-max-len128
latency-monitor-threshold0
notify-keyspace-events""
hash-max-ziplist-entries512
hash-max-ziplist-value64
list-max-ziplist-size-2
list-compress-depth0
set-max-intset-entries512
zset-max-ziplist-entries128
zset-max-ziplist-value64
hll-sparse-max-bytes3000
activerehashingyes
client-output-buffer-limitnormal 0 0 0
client-output-buffer-limitslave 256mb 64mb 60
client-output-buffer-limitpubsub 32mb 8mb 60
hz 10
aof-rewrite-incremental-fsyncyes
2. 创建redis所需的日志文件以及存储数据所需的目录
$ mkdir -p data/16002 log/16002
3. 启动redis
$ ~/run/redis-slave/src/redis-server ~/run/redis-slave/redis.conf
$ netstat -lantup|grep redis
(Not allprocesses could be identified, non-owned process info
will not be shown, you would have to be rootto see it all.)
tcp 0 0 10.0.0.189:16001 0.0.0.0:* LISTEN 8981/redis-server 1
tcp0 0 10.0.0.189:16002 0.0.0.0:* LISTEN 8996/redis-server 1
tcp 0 0 10.0.0.189:57884 10.0.0.189:16001 ESTABLISHED 8996/redis-server 1
tcp00 10.0.0.189:16001 10.0.0.189:57884 ESTABLISHED 8981/redis-server 1
$ cat log/16002/redis-slave.log
8990:S 24Dec 15:36:09.108 # You requested maxclients of 10000 requiring at least 10032max file descriptors.
8990:S 24Dec 15:36:09.108 # Server can't set maximum open files to 10032 because of OSerror: Operation not permitted.
8990:S 24Dec 15:36:09.108 # Current maximum open files is 4096. maxclients has beenreduced to 4064 to compensate for low ulimit. If you need higher maxclientsincrease 'ulimit -n'.
_._
_.-``__ ''-._
_.-`` `.`_. ''-._ Redis 3.2.6(00000000/0) 64 bit
.-`` .-```. ```\/ _.,_ ''-._
( ' , .-` | `, ) Running in standalone mode
|`-._`-...-` __...-.``-._|'` _.-'| Port: 16002
| `-._ `._ / _.-' | PID: 8990
`-._ `-._`-./_.-' _.-'
|`-._`-._ `-.__.-' _.-'_.-'|
| `-._`-._ _.-'_.-' | http://redis.io
`-._ `-._`-.__.-'_.-' _.-'
|`-._`-._ `-.__.-' _.-'_.-'|
| `-._`-._ _.-'_.-' |
`-._ `-._`-.__.-'_.-' _.-'
`-._ `-.__.-' _.-'
`-._ _.-'
`-.__.-'
8990:S 24Dec 15:36:09.231 # WARNING: The TCP backlog setting of 511 cannot be enforcedbecause /proc/sys/net/core/somaxconn is set to the lower value of 128.
8990:S 24Dec 15:36:09.231 # Server started, Redis version 3.2.6
8990:S 24Dec 15:36:09.231 # WARNING overcommit_memory is set to 0! Background save mayfail under low memory condition. To fix this issue add 'vm.overcommit_memory =1' to /etc/sysctl.conf and then reboot or run the command 'sysctlvm.overcommit_memory=1' for this to take effect.
8990:S 24Dec 15:36:09.231 # WARNING you have Transparent Huge Pages (THP) supportenabled in your kernel. This will create latency and memory usage issues withRedis. To fix this issue run the command 'echo never > /sys/kernel/mm/transparent_hugepage/enabled'as root, and add it to your /etc/rc.local in order to retain the setting aftera reboot. Redis must be restarted after THP is disabled.
8990:S 24Dec 15:36:09.231 * Theserver is now ready to accept connections on port 16002
8990:S 24Dec 15:36:09.232 * Connectingto MASTER 10.0.0.189:16001
8990:S 24Dec 15:36:09.269 * MASTER<-> SLAVE sync started
8990:S 24 Dec 15:36:09.269 * Non blocking connect for SYNC firedthe event.
8990:S 24 Dec 15:36:09.270 * Master replied to PING, replicationcan continue...
8990:S 24 Dec 15:36:09.270 * Partial resynchronization notpossible (no cached master)
8990:S 24 Dec 15:36:09.588 * Full resync from master:f97b8e62d896862a0941aeb66c199a0d0d31b943:1
8990:S 24 Dec 15:36:09.603 * MASTER <-> SLAVE sync: receiving76 bytes from master
8990:S 24 Dec 15:36:09.603 * MASTER <-> SLAVE sync: Flushingold data
8990:S 24 Dec 15:36:09.603 * MASTER <-> SLAVE sync: LoadingDB in memory
8990:S 24 Dec 15:36:09.603 * MASTER <-> SLAVE sync: Finishedwith success
四、redis主从测试
1. 主库写入数据
$ ~/run/redis/src/redis-cli -h 10.0.0.189 -p 16001
10.0.0.189:16001>set name abc
OK
10.0.0.189:16001>get name
"abc"
10.0.0.189:16001>
2. 从库读取数据
$ ~/run/redis/src/redis-cli -h 10.0.0.189 -p 16002
10.0.0.189:16002>get name
"abc"
10.0.0.189:16002> set age 30
(error) READONLY You can't write against a read only slave.
10.0.0.189:16002>
3. 主从库查看日志
$ tail log/16001/redis-master.log
8981:M 24Dec 15:36:44.131 * Slave 10.0.0.189:16002 asks for synchronization
8981:M 24Dec 15:36:44.131 * Full resync requested by slave 10.0.0.189:16002
8981:M 24Dec 15:36:44.131 * Starting BGSAVE for SYNC with target: disk
8981:M 24Dec 15:36:44.559 * Background saving started by pid 8999
8999:C 24Dec 15:36:44.616 * DB saved on disk
8999:C 24Dec 15:36:44.616 * RDB: 8 MB of memory used by copy-on-write
8981:M 24Dec 15:36:44.669 * Background saving terminated with success
8981:M 24Dec 15:36:44.669 * Synchronization with slave 10.0.0.189:16002 succeeded
$ tail log/16002/redis-slave.log
8996:S 24Dec 15:36:44.126 * Connecting to MASTER 10.0.0.189:16001
8996:S 24Dec 15:36:44.131 * MASTER <-> SLAVE sync started
8996:S 24Dec 15:36:44.131 * Non blocking connect for SYNC fired the event.
8996:S 24Dec 15:36:44.131 * Master replied to PING, replication can continue...
8996:S 24Dec 15:36:44.131 * Partial resynchronization not possible (no cached master)
8996:S 24Dec 15:36:44.605 * Full resync from master:f97b8e62d896862a0941aeb66c199a0d0d31b943:43
8996:S 24Dec 15:36:44.669 * MASTER <-> SLAVE sync: receiving 76 bytes from master
8996:S 24Dec 15:36:44.669 * MASTER <-> SLAVE sync: Flushing old data
8996:S 24Dec 15:36:44.669 * MASTER <-> SLAVE sync: Loading DB in memory
8996:S 24Dec 15:36:44.670 * MASTER <-> SLAVE sync: Finished with success
4. 主从库磁盘备份数据
$ ll data/16001/
total 4
-rw-rw-r--.1 redis redis 76 Dec 24 15:36 dump.rdb
$ ll data/16002/
total 4
-rw-r--r--.1 redis redis 76 Dec 24 15:36 dump.rdb
$
Redis绑定的IP地址
Redis服务的端口
开启Daemon启动模式
Redis的日志文件
Redis存放DB文件的目录
查看redis的端口是否已经处于监听状态
查看redis的启动日志
指定主库的地址以及端口
从库端口已经处于监听状态，并且已经与主库建立连接
同步日志
无法写入数据，由于是从库
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