单机部署多实例redis
http://www.cnblogs.com/lgeng/p/6623336.html
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本文转自:http://www.cnblogs.com/lgeng/p/6623336.html
一，单机多实例：
Redis官网: https://redis.io/
1,安装：
yum -y install gcc gcc-c++ #安装编译工具
[root@localhost data]# wget http://download.redis.io/releases/redis-3.2.8.tar.gz
[root@localhost data]# tar xzf redis-3.2.8.tar.gz
[root@localhost data]# cd redis-3.2.8
[root@localhost data]# make
[root@localhost data]# mv redis-3.2.8 /usr/local/redis
注意：可直接 yum install redis -y 安装
启动：（默认启动6379端口）
[root@localhost redis]# /usr/local/redis/src/redis-server
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2，验证：使用 redis-cli命令验证 （注意路径）
[root@localhost src]# /usr/local/redis/src/redis-cli -p 6379
127.0.0.1:6379> keys *
(empty list or set)
127.0.0.1:6379> set k1 v1
OK
127.0.0.1:6379> keys *
1) "k1"
127.0.0.1:6379> get k1
"v1"
127.0.0.1:6379>
127.0.0.1:6379>
3,配置环境变量
输入redis-server和redis-cli命令，每次输入完整的路径
将路径添加到PATH变量中
echo 'PATH=${PATH}:/usr/local/redis/src/' >> /etc/profile
source /etc/profile #<== 重新加载配置文件
二，单机多实例
创建不同实例的数据存放目录 分别创建6380，6381，6382 三个实例
每个实例目录中分别创建 conf，db，log目录，并拷贝配置文件到conf中
[root@localhost /]# mkdir -p /data/redis/{6380,6381,6382}/{conf,db,log}
[root@localhost /]# cp /usr/local/redis/redis.conf /data/redis/6380/conf/
[root@localhost /]# cp /usr/local/redis/redis.conf /data/redis/6381/conf/
[root@localhost /]# cp /usr/local/redis/redis.conf /data/redis/6382/conf/
[root@localhost /]#
[root@localhost /]# cd /data/redis
[root@localhost redis]# ls
6380 6381 6382
[root@localhost redis]# tree
.
├── 6380
│ ├── conf
│ │ └── redis.conf
│ ├── db
│ └── log
├── 6381
│ ├── conf
│ │ └── redis.conf
│ ├── db
│ └── log
└── 6382
├── conf
│ └── redis.conf
├── db
└── log
12 directories, 3 files
[root@localhost redis]#
[root@localhost redis]#
修改配置文件：
将redis.conf修改为对应的实例参数,修改部分如下
[root@localhost redis]# grep "6380\|daemonize" 6380/conf/redis.conf
daemonize yes <== daemon进程运行
pidfile /data/redis/6380/redis.pid <== 进程id存放文件
port 6380 <== 端口
logfile /data/redis/6380/log/redis.log <== 日志目录
dir /data/redis/6380/db/ <== db目录
[root@localhost redis]#
[root@localhost redis]# grep "6381" 6381/conf/redis.conf
daemonize yes
pidfile /data/redis/6381/redis.pid
port 6381
logfile /data/redis/6381/log/redis.log
dir /data/redis/6381/db/
[root@localhost redis]#
[root@localhost redis]# grep "6382" 6382/conf/redis.conf
daemonize yes
pidfile /data/redis/6382/redis.pid
port 6382
logfile /data/redis/6382/log/redis.log
dir /data/redis/6382/db/
[root@localhost redis]#
[root@localhost redis]#
启动实例：
[root@localhost redis]# redis-server /data/redis/6380/conf/redis.conf
[root@localhost redis]# redis-server /data/redis/6381/conf/redis.conf
[root@localhost redis]# redis-server /data/redis/6382/conf/redis.conf
[root@localhost redis]#
[root@localhost redis]# netstat -ntlp | grep -E ":6380|:6381|:6382"
tcp 0 0 127.0.0.1:6380 0.0.0.0:* LISTEN 14301/redis-server
tcp 0 0 127.0.0.1:6381 0.0.0.0:* LISTEN 14305/redis-server
tcp 0 0 127.0.0.1:6382 0.0.0.0:* LISTEN 14309/redis-server
[root@localhost redis]#
[root@localhost redis]#
验证（略） redis-cli -p 6380 ; redi-cli -p 6381 ; redis-cli -p 6382
三，配置主从同步
修改从库配置，6380实例为主库， 从库为 6381，6382
[root@localhost ~]# vim /data/redis/6381/conf/redis.conf
[root@localhost ~]# vim /data/redis/6382/conf/redis.conf
################################# REPLICATION #################################
# Master-Slave replication. Use slaveof to make a Redis instance a copy of
# another Redis server. A few things to understand ASAP about Redis replication.
#
# 1) Redis replication is asynchronous, but you can configure a master to
# stop accepting writes if it appears to be not connected with at least
# a given number of slaves.
# 2) Redis slaves are able to perform a partial resynchronization with the
# master if the replication link is lost for a relatively small amount of
# time. You may want to configure the replication backlog size (see the next
# sections of this file) with a sensible value depending on your needs.
# 3) Replication is automatic and does not need user intervention. After a
# network partition slaves automatically try to reconnect to masters
# and resynchronize with them.
#
# slaveof <masterip> <masterport>
slaveof 127.0.0.1 6380
# If the master is password protected (using the "requirepass" configuration
# directive below) it is possible to tell the slave to authenticate before
# starting the replication synchronization process, otherwise the master will
# refuse the slave request.
#
# masterauth <master-password>
# When a slave loses its connection with the master, or when the replication
# is still in progress, the slave can act in two different ways:
#
# 1) if slave-serve-stale-data is set to 'yes' (the default) the slave will
# still reply to client requests, possibly with out of date data, or the
# data set may just be empty if this is the first synchronization.
#
# 2) if slave-serve-stale-data is set to 'no' the slave will reply with
# an error "SYNC with master in progress" to all the kind of commands
验证：
先在主库上info一下
[root@localhost 6380]# redis-cli -p 6380 "info"
.
.此处略去n行
.
# Replication
role:master <== 角色：master
connected_slaves:2 <== slave链接数 2
slave0:ip=127.0.0.1,port=6381,state=online,offset=141,lag=1 <== slave 的信息
slave1:ip=127.0.0.1,port=6382,state=online,offset=141,lag=1
master_repl_offset:141
repl_backlog_active:1
repl_backlog_size:1048576
repl_backlog_first_byte_offset:2
repl_backlog_histlen:140
看看从库
[root@localhost 6381]# redis-cli -p 6381 "info"
...
.此处略去n行
....
# Replication
role:slave <==角色 slave
master_host:127.0.0.1 <==master主机
master_port:6380 <== master端口
master_link_status:up <== 链接状态 up
master_last_io_seconds_ago:5
master_sync_in_progress:0
slave_repl_offset:673
slave_priority:100
slave_read_only:1
connected_slaves:0
master_repl_offset:0
repl_backlog_active:0
repl_backlog_size:1048576
repl_backlog_first_byte_offset:0
repl_backlog_histlen:0
[root@localhost 6382]# redis-cli -p 6382 "info"
...
.此处略去n行
....
# Replication
role:slave
master_host:127.0.0.1
master_port:6380
master_link_status:up
master_last_io_seconds_ago:4
master_sync_in_progress:0
slave_repl_offset:911
slave_priority:100
slave_read_only:1
connected_slaves:0
master_repl_offset:0
repl_backlog_active:0
repl_backlog_size:1048576
repl_backlog_first_byte_offset:0
repl_backlog_histlen:0
在主库上写入数据：[root@localhost 6380]# redis-cli -p 6380
127.0.0.1:6380> set k1 v1
OK
127.0.0.1:6380> keys *
1) "k1"
127.0.0.1:6380> get k1
"v1"
127.0.0.1:6380>
从库上查看是否已同步[root@localhost 6381]# redis-cli -p 6381
127.0.0.1:6381> keys *
1) "k1"
127.0.0.1:6381> get k1
"v1"
127.0.0.1:6381>
127.0.0.1:6381> exit
[root@localhost 6381]# redis-cli -p 6382
127.0.0.1:6382> keys *
1) "k1"
127.0.0.1:6382> get k1
"v1"
127.0.0.1:6382>
主库删除数据：
[root@localhost 6380]# redis-cli -p 6380
127.0.0.1:6380> keys *
1) "k1"
127.0.0.1:6380> del k1
(integer) 1
127.0.0.1:6380> keys *
(empty list or set)
127.0.0.1:6380>
从库查看
[root@localhost 6381]# redis-cli -p 6381
127.0.0.1:6381> keys *
(empty list or set)
127.0.0.1:6381> exit
[root@localhost 6381]# redis-cli -p 6382
127.0.0.1:6382> keys *
(empty list or set)
127.0.0.1:6382>
127.0.0.1:6382> exit
[root@localhost 6381]#
END
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