redis集群尝试

1. 使用Docker搭建redis主从复制集群

启动服务

docker run --name redis-master -p 6379:6379 -d redis

docker run --link redis-master:redis-master -v /data/docker/redis/redis.conf:/usr/local/etc/redis/redis.conf --name redis-slave1 -d redis redis-server /usr/local/etc/redis/redis.conf

docker run --link redis-master:redis-master -v /data/docker/redis/redis.conf:/usr/local/etc/redis/redis.conf --name redis-slave2 -d redis redis-server /usr/local/etc/redis/redis.conf

docker run --link redis-master:redis-master -v /data/docker/redis/redis.conf:/usr/local/etc/redis/redis.conf --name redis-slave3 -d redis redis-server /usr/local/etc/redis/redis.conf

本地客户端查看

D:\redis\redis-cli.exe -h xxx.xxx.xxx.xxx -p 6379

xxx.xxx.xxx.xxx:6379> info

# Replication

role:master

connected_slaves:3

slave0:ip=172.17.0.4,port=6379,state=online,offset=58278,lag=0

slave1:ip=172.17.0.5,port=6379,state=online,offset=58278,lag=0

slave2:ip=172.17.0.3,port=6379,state=online,offset=58278,lag=1

master_replid:b8a0697619cb49c9e82cdf57d404b998e7f92615

master_replid2:0000000000000000000000000000000000000000

master_repl_offset:58278

second_repl_offset:-1

repl_backlog_active:1

repl_backlog_size:1048576

repl_backlog_first_byte_offset:1

repl_backlog_histlen:58278

性能测试，10000次太慢，100并发测试

PS E:\> D:\redis\redis-benchmark.exe -h xxx.xxx.xxx.xxx -p 6379 -n 100 -q

PING_INLINE: 813.01 requests per second

PING_BULK: 813.01 requests per second

SET: 840.34 requests per second

GET: 746.27 requests per second

INCR: 819.67 requests per second

LPUSH: 724.64 requests per second

RPUSH: 793.65 requests per second

LPOP: 833.33 requests per second

RPOP: 806.45 requests per second

SADD: 806.45 requests per second

SPOP: 826.45 requests per second

LPUSH (needed to benchmark LRANGE): 819.67 requests per second

LRANGE_100 (first 100 elements): 684.93 requests per second

LRANGE_300 (first 300 elements): 49.07 requests per second

LRANGE_500 (first 450 elements): 23.69 requests per second

LRANGE_600 (first 600 elements): 22.81 requests per second

MSET (10 keys): 819.67 requests per second

关掉一个从服务：

#查看所有运行容器

$ docker container ls

CONTAINER ID        IMAGE               COMMAND                  CREATED             STATUS              PORTS                    NAMES

0ab06a9f786a        redis               "docker-entrypoint..."   34 minutes ago      Up 34 minutes       6379/tcp                 redis-slave3

8bfdd1cd2e60        redis               "docker-entrypoint..."   34 minutes ago      Up 34 minutes       6379/tcp                 redis-slave2

89fc61fb4804        redis               "docker-entrypoint..."   36 minutes ago      Up 36 minutes       6379/tcp                 redis-slave1

e32817e5e65c        redis               "docker-entrypoint..."   40 minutes ago      Up 6 minutes        0.0.0.0:6379->6379/tcp   redis-master

[root@VM_128_25_centos ~]# docker container ls

CONTAINER ID        IMAGE               COMMAND                  CREATED             STATUS              PORTS                    NAMES

0ab06a9f786a        redis               "docker-entrypoint..."   34 minutes ago      Up 34 minutes       6379/tcp                 redis-slave3

8bfdd1cd2e60        redis               "docker-entrypoint..."   34 minutes ago      Up 34 minutes       6379/tcp                 redis-slave2

89fc61fb4804        redis               "docker-entrypoint..."   36 minutes ago      Up 36 minutes       6379/tcp                 redis-slave1

e32817e5e65c        redis               "docker-entrypoint..."   40 minutes ago      Up 6 minutes        0.0.0.0:6379->6379/tcp   redis-master

#停到一个从服务，可用name也可以用id

$ docker stop redis-slave3

redis-slave3

#再次查看确实停掉了

$ docker container ls

CONTAINER ID        IMAGE               COMMAND                  CREATED             STATUS              PORTS                    NAMES

8bfdd1cd2e60        redis               "docker-entrypoint..."   35 minutes ago      Up 35 minutes       6379/tcp                 redis-slave2

89fc61fb4804        redis               "docker-entrypoint..."   37 minutes ago      Up 37 minutes       6379/tcp                 redis-slave1

e32817e5e65c        redis               "docker-entrypoint..."   42 minutes ago      Up 7 minutes        0.0.0.0:6379->6379/tcp   redis-master

再次测试发现区别不大， docker start redis-slave3启动刚才停掉的容器。

$  docker start redis-slave3

redis-slave3

$docker container ls

CONTAINER ID        IMAGE               COMMAND                  CREATED             STATUS              PORTS                    NAMES

0ab06a9f786a        redis               "docker-entrypoint..."   3 hours ago         Up 1 second         6379/tcp                 redis-slave3

8bfdd1cd2e60        redis               "docker-entrypoint..."   3 hours ago         Up 3 hours          6379/tcp                 redis-slave2

89fc61fb4804        redis               "docker-entrypoint..."   3 hours ago         Up 3 hours          6379/tcp                 redis-slave1

e32817e5e65c        redis               "docker-entrypoint..."   3 hours ago         Up About an hour    0.0.0.0:6379->6379/tcp   redis-master

看到，又有了第三个从服务redis-slave3。

p.s. 修改了配置/data/docker/redis.conf后，可以关掉redis-master容器再开启用来生效配置。

换一台机子搭建从服务器。

2. 配置另一台服务器为从服务器

用阿里的一个闲置服务器，这里就不用docker了，玩不太懂，还是乖乖yum安装redis

2.1 安装配置redis

#安装

yum install redis

#启动

service redis start

#配置文件在

/etc/redis.conf

安装redis之后，发现客户端连接无反应，配置规则并关闭防火墙后，，提醒redis受保护模式拒绝访问，配置中 daemonize no 改为yes,再次访问发现奇怪的错误在驱动器 %1 上插入软盘，redis添加密码 requirepass 123456，解决错误。

客户端再次访问redis-cli.exe -h yyy.yyy.yyy.yyy -p 6379 -a 123456，访问成功。

可以用service redis restart重启，但是无法用service redis stop停止，可能是有密码的原因，可以进客户端然后shutdown掉

$ redis-cli -a 123456

127.0.0.1:6379> SHUTDOWN

not connected> exit

也可以直接用redis-cli -p 6380 -a 123456 shutdown删除，这里带-p是因为我改了端口，默认为6379则不用-p，如果没密码的话，那也不用-a直接redis-cli shutdown即可关闭。

2.2 配置从服务器

配置中slaveof <masterip> <masterport>改为主服务器ip

slaveof xxx.xxx.xxx.xxx 6379

试了好久无法获取到master的值，查看redis日志

37358 22528:S 03 May 18:08:23.521 * MASTER <-> SLAVE sync: Loading DB in memory

37359 22528:S 03 May 18:08:23.521 # Can't handle RDB format version 8

37360 22528:S 03 May 18:08:23.521 # Failed trying to load the MASTER synchronization DB from disk

查看两个redis版本

从服务器直接安装的redis，查看很简单

$redis-server --version

Redis server v=3.2.11 sha=00000000:0 malloc=jemalloc-3.6.0 bits=64 build=6ad59

主服务器docker下版本查看

$docker run redis redis-server --version

Redis server v=4.0.9 sha=00000000:0 malloc=jemalloc-4.0.3 bits=64 build=22c6ee

是不一样，怎么办呢，搜了几个，都是删除rdb文件，我删了也不行。再安装一次redis吧。

从服务器再次安装redis 4.0.9，安装并再次配置后客户端连接会有错误

Error: Server closed the connection，配置更改注释bind也没用，发现没有指定文件，再次启动redis

./src/redis-server /root/redis-4.0.9/redis.conf

,可以连接并可访问主服务器数据。

试验一下，xxx为主服务器IP，yyy为从服务器IP：

PS E:\> D:\redis\redis-cli.exe -h xxx.xxx.xxx.xxx -p 6379

xxx.xxx.xxx.xxx:6379> set day 3

OK

PS E:\> D:\redis\redis-cli.exe -h yyy.yyy.yyy.yyy -p 6379 -a 123456

yyy.yyy.yyy.yyy:6379> get day

"3"

yyy.yyy.yyy.yyy:6379> set day2 111

(error) READONLY You can't write against a read only slave.

yyy.yyy.yyy.yyy:6379>

可以看到从服务器slave不能写，只能读。

3. 性能测试

先关闭调主服务器之前建的三个slave，

$ docker stop redis-slave1

redis-slave

$ docker stop redis-slave2

redis-slave2

$ docker stop redis-slave3

redis-slave3

开始测试，

没有使用从服务器的slave时,

PS E:\> D:\redis\redis-benchmark.exe -h xxx.xxx.xxx.xxx -p 6379 -n 1000 -q

PING_INLINE: 1204.82 requests per second

PING_BULK: 1191.90 requests per second

SET: 1219.51 requests per second

GET: 1213.59 requests per second

INCR: 1209.19 requests per second

LPUSH: 1210.65 requests per second

RPUSH: 1183.43 requests per second

LPOP: 1197.60 requests per second

RPOP: 1222.49 requests per second

SADD: 1144.16 requests per second

SPOP: 1210.65 requests per second

LPUSH (needed to benchmark LRANGE): 1215.07 requests per second

LRANGE_100 (first 100 elements): 102.64 requests per second

LRANGE_300 (first 300 elements): 29.06 requests per second

LRANGE_500 (first 450 elements): 25.27 requests per second

LRANGE_600 (first 600 elements): 15.88 requests per second

MSET (10 keys): 1201.92 requests per second

启动从服务器,使用从服务器slave

PS E:\> D:\redis\redis-benchmark.exe -h xxx.xxx.xxx.xxx -p 6379 -n 1000 -q

PING_INLINE: 1184.83 requests per second

PING_BULK: 1207.73 requests per second

SET: 1203.37 requests per second

GET: 1156.07 requests per second

INCR: 1184.83 requests per second

LPUSH: 1203.37 requests per second

RPUSH: 1201.92 requests per second

LPOP: 1223.99 requests per second

RPOP: 1200.48 requests per second

SADD: 1179.25 requests per second

SPOP: 1132.50 requests per second

LPUSH (needed to benchmark LRANGE): 1190.48 requests per second

LRANGE_100 (first 100 elements): 103.00 requests per second

LRANGE_300 (first 300 elements): 30.63 requests per second

LRANGE_500 (first 450 elements): 26.52 requests per second

LRANGE_600 (first 600 elements): 14.22 requests per second

MSET (10 keys): 1233.05 requests per second

查看主服务器信息

info

# Replication

role:master

connected_slaves:1

slave0:ip=yyy.yyy.yyy.yyy,port=6379,state=online,offset=814862,lag=1

master_replid:600f93df98b7eff6799a0e0cdb6c6d85fd401793

master_replid2:0000000000000000000000000000000000000000

master_repl_offset:814862

second_repl_offset:-1

repl_backlog_active:1

repl_backlog_size:1048576

repl_backlog_first_byte_offset:1

repl_backlog_histlen:814862

看到slave0就是从服务器的slave，可是性能怎么没有提升么，读也没有提升多少啊，可能是我测试的姿势不对？还是服务器太渣。以后再深究吧。

感谢你阅读到了这里，这篇笔记太凌乱又因鄙人不才，本不成文章，可是放到私人笔记里也帮助不到任何人（包括自己），请多多批评。

其他参考