一、环境描述

DB：redis 3.0.7 最新稳定版

OS：centos 6.6_x64

二、安装步骤

1.基本软件包安装

[root@mysql-121 ~]# yum -y install ruby

[root@mysql-121 ~]# yum -y install rubygems

下载路径，上传到/tmp路径下

https://rubygems.org/gems/redis/versions/3.0.0

[root@mysql-121 ~]# cd /tmp

[root@mysql-121 tmp]# ls

orbit-gdm  pulse-hnvCTnUHwlDW  pulse-ua8DXn7r5gA8  redis-3.0.0.gem

[root@mysql-121 tmp]# gem install -l redis-3.0.0.gem

[root@mysql-121 tmp]# cd /tmp

[root@mysql-121 tmp]# ll

total 1360

drwx------  2 gdm  gdm     4096 Sep  1 09:13 orbit-gdm

drwx------. 2 gdm  gdm     4096 Sep  1 09:13 pulse-hnvCTnUHwlDW

drwx------. 2 root root    4096 Aug  1 17:07 pulse-ua8DXn7r5gA8

drwxrwxr-x  6 root root    4096 Jan 25  2016 redis-3.0.7

-rw-r--r--  1 root root 1375200 Nov 25 10:01 redis-3.0.7.tar.gz

[root@mysql-121 tmp]# 

2.解压缩

[root@mysql-121 tmp]# tar -zxvf redis-3.0.7.tar.gz

3.编译

[root@mysql-121 tmp]# cd redis-3.0.7

[root@mysql-121 redis-3.0.7]# 

[root@mysql-121 redis-3.0.7]# make

4.安装

[root@mysql-121 redis-3.0.7]# make install 

5.测试

[root@mysql-121 redis-3.0.7]# yum install tcl

[root@mysql-121 redis-3.0.7]# make test 

6.可执行命令统一路径

[root@mysql-121 src]# cd /tmp/redis-3.0.7/src

[root@mysql-121 src]# cp redis-trib.rb /usr/local/bin

[root@mysql-121 src]# cd /usr/local/bin

[root@mysql-121 bin]# ll

total 15968

-rwxr-xr-x 1 root root 4587299 Nov 29 17:43 redis-benchmark

-rwxr-xr-x 1 root root   22177 Nov 29 17:43 redis-check-aof

-rwxr-xr-x 1 root root   45387 Nov 29 17:43 redis-check-dump

-rwxr-xr-x 1 root root 4696506 Nov 29 17:43 redis-cli

lrwxrwxrwx 1 root root      12 Nov 29 17:43 redis-sentinel -> redis-server

-rwxr-xr-x 1 root root 6469255 Nov 29 17:43 redis-server

-rwxr-xr-x 1 root root   60527 Nov 29 17:55 redis-trib.rb

7.创建目录

[root@mysql-121 bin]# mkdir -p /data/redis/conf

[root@mysql-121 bin]# mkdir -p /data/redis/log

[root@mysql-121 bin]# mkdir -p /data/redis/data

8.配置参数

[root@mysql-121 redis-3.0.7]# cp redis.conf /data/redis/conf/redis_6379.conf

[root@mysql-121 redis-3.0.7]# cp redis.conf /data/redis/conf/redis_6380.conf

[root@mysql-121 redis-3.0.7]# cp redis.conf /data/redis/conf/redis_6381.conf

[root@mysql-121 redis-3.0.7]# cp redis.conf /data/redis/conf/redis_6382.conf

[root@mysql-121 redis-3.0.7]# cp redis.conf /data/redis/conf/redis_6383.conf

[root@mysql-121 redis-3.0.7]# cp redis.conf /data/redis/conf/redis_6384.conf

[root@mysql-121 redis-3.0.7]# cd /data/redis/conf/

[root@mysql-121 conf]# grep -v -E '(^#|^$)' redis_6379.conf

vi redis_6379.conf 

##########general##########

daemonize yes

pidfile /data/redis/data/redis_6379.pid

port 6379

tcp-backlog 511

timeout 0

tcp-keepalive 0

loglevel notice

logfile "/data/redis/log/redis_6379.log"

##########rdb##########

databases 16

save 900 1

save 300 10

save 60 10000

stop-writes-on-bgsave-error yes

rdbcompression yes

rdbchecksum yes

dbfilename dump_6379.rdb

dir /data/redis/data/

##########slave##########

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

##########aof##########

appendonly yes

appendfilename "appendonly_6379.aof"

appendfsync everysec

no-appendfsync-on-rewrite no

auto-aof-rewrite-percentage 100

auto-aof-rewrite-min-size 64mb

aof-load-truncated yes

##########lua##########

lua-time-limit 5000

##########cluster##########

cluster-enabled yes

cluster-config-file nodes_6379.conf

cluster-node-timeout 15000

cluster-slave-validity-factor 10

cluster-migration-barrier 1

cluster-require-full-coverage no

##########slowlog##########

slowlog-log-slower-than 10000

slowlog-max-len 128

##########optimize##########

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

###########################################

vi redis_6379.conf 替换  :%s/6379/6380

vi redis_6379.conf 替换  :%s/6379/6381 以此类推

三、创建集群

1.启动集群相关节点（必须是空节点）

[root@mysql-121 conf]# redis-server /data/redis/conf/redis_6379.conf 

[root@mysql-121 conf]# redis-server /data/redis/conf/redis_6380.conf   

[root@mysql-121 conf]# redis-server /data/redis/conf/redis_6381.conf  

[root@mysql-121 conf]# redis-server /data/redis/conf/redis_6382.conf  

[root@mysql-121 conf]# redis-server /data/redis/conf/redis_6383.conf  

[root@mysql-121 conf]# redis-server /data/redis/conf/redis_6384.conf 

[root@mysql-121 conf]# ps -ef |grep redis

root      7702     1  0 18:36 ?        00:00:00 redis-server *:6379 [cluster]                

root      7708     1  0 18:37 ?        00:00:00 redis-server *:6380 [cluster]                

root      7712     1  0 18:37 ?        00:00:00 redis-server *:6381 [cluster]                

root      7716     1  0 18:37 ?        00:00:00 redis-server *:6382 [cluster]                

root      7720     1  0 18:37 ?        00:00:00 redis-server *:6383 [cluster]                

root      7724     1  0 18:37 ?        00:00:00 redis-server *:6384 [cluster] 

2.使用自带的ruby工具(redis-trib.rb)构建集群

[root@mysql-121 ~]# redis-trib.rb help

[root@mysql-121 ~]# redis-trib.rb create --replicas 1 192.168.80.121:6379 192.168.80.121:6380 192.168.80.121:6381 192.168.80.121:6382 192.168.80.121:6383 192.168.80.121:6384 

>>> Creating cluster

>>> Performing hash slots allocation on 6 nodes...

Using 3 masters:

192.168.80.121:6379

192.168.80.121:6380

192.168.80.121:6381

Adding replica 192.168.80.121:6382 to 192.168.80.121:6379

Adding replica 192.168.80.121:6383 to 192.168.80.121:6380

Adding replica 192.168.80.121:6384 to 192.168.80.121:6381

M: b2e0265c1ae983c339eaa362235455d3cc54a025 192.168.80.121:6379

   slots:0-5460 (5461 slots) master

M: dedffe5ad37787d4cad6cc2d2426ba4d504b3c44 192.168.80.121:6380

   slots:5461-10922 (5462 slots) master

M: e6af78beb2457fa34b9530c7e11d6caeac579732 192.168.80.121:6381

   slots:10923-16383 (5461 slots) master

S: 41ca12c81e4acd7212b550904e8050c9b604734c 192.168.80.121:6382

   replicates b2e0265c1ae983c339eaa362235455d3cc54a025

S: 3e3afb6769c4bdfbd8373f058dc54f18baeba585 192.168.80.121:6383

   replicates dedffe5ad37787d4cad6cc2d2426ba4d504b3c44

S: 31feff8d759aa78699d428546b0d775457626ac6 192.168.80.121:6384

   replicates e6af78beb2457fa34b9530c7e11d6caeac579732

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 192.168.80.121:6379)

M: b2e0265c1ae983c339eaa362235455d3cc54a025 192.168.80.121:6379

   slots:0-5460 (5461 slots) master

M: dedffe5ad37787d4cad6cc2d2426ba4d504b3c44 192.168.80.121:6380

   slots:5461-10922 (5462 slots) master

M: e6af78beb2457fa34b9530c7e11d6caeac579732 192.168.80.121:6381

   slots:10923-16383 (5461 slots) master

M: 41ca12c81e4acd7212b550904e8050c9b604734c 192.168.80.121:6382

   slots: (0 slots) master

   replicates b2e0265c1ae983c339eaa362235455d3cc54a025

M: 3e3afb6769c4bdfbd8373f058dc54f18baeba585 192.168.80.121:6383

   slots: (0 slots) master

   replicates dedffe5ad37787d4cad6cc2d2426ba4d504b3c44

M: 31feff8d759aa78699d428546b0d775457626ac6 192.168.80.121:6384

   slots: (0 slots) master

   replicates e6af78beb2457fa34b9530c7e11d6caeac579732

[OK] All nodes agree about slots configuration.

>>> Check for open slots...

>>> Check slots coverage...

[OK] All 16384 slots covered.

3.检查集群状态

 

[root@mysql-121 ~]# redis-trib.rb check 192.168.80.121:6379   

>>> Performing Cluster Check (using node 192.168.80.121:6379)

M: b2e0265c1ae983c339eaa362235455d3cc54a025 192.168.80.121:6379

   slots:0-5460 (5461 slots) master

   1 additional replica(s)

M: e6af78beb2457fa34b9530c7e11d6caeac579732 192.168.80.121:6381

   slots:10923-16383 (5461 slots) master

   1 additional replica(s)

S: 31feff8d759aa78699d428546b0d775457626ac6 192.168.80.121:6384

   slots: (0 slots) slave

   replicates e6af78beb2457fa34b9530c7e11d6caeac579732

S: 3e3afb6769c4bdfbd8373f058dc54f18baeba585 192.168.80.121:6383

   slots: (0 slots) slave

   replicates dedffe5ad37787d4cad6cc2d2426ba4d504b3c44

S: 41ca12c81e4acd7212b550904e8050c9b604734c 192.168.80.121:6382

   slots: (0 slots) slave

   replicates b2e0265c1ae983c339eaa362235455d3cc54a025

M: dedffe5ad37787d4cad6cc2d2426ba4d504b3c44 192.168.80.121:6380

   slots:5461-10922 (5462 slots) master

   1 additional replica(s)

[OK] All nodes agree about slots configuration.

>>> Check for open slots...

>>> Check slots coverage...

[OK] All 16384 slots covered.

4.登陆集群

[root@mysql-121 ~]# redis-cli -c -p 6379

127.0.0.1:6379> cluster info 

cluster_state:ok

cluster_slots_assigned:16384

cluster_slots_ok:16384

cluster_slots_pfail:0

cluster_slots_fail:0

cluster_known_nodes:6

cluster_size:3

cluster_current_epoch:6

cluster_my_epoch:1

cluster_stats_messages_sent:1089

cluster_stats_messages_received:1089

127.0.0.1:6379> cluster nodes

e6af78beb2457fa34b9530c7e11d6caeac579732 192.168.80.121:6381 master - 0 1480417102632 3 connected 10923-16383

31feff8d759aa78699d428546b0d775457626ac6 192.168.80.121:6384 slave e6af78beb2457fa34b9530c7e11d6caeac579732 0 1480417101630 6 connected

3e3afb6769c4bdfbd8373f058dc54f18baeba585 192.168.80.121:6383 slave dedffe5ad37787d4cad6cc2d2426ba4d504b3c44 0 1480417102632 5 connected

41ca12c81e4acd7212b550904e8050c9b604734c 192.168.80.121:6382 slave b2e0265c1ae983c339eaa362235455d3cc54a025 0 1480417099627 4 connected

dedffe5ad37787d4cad6cc2d2426ba4d504b3c44 192.168.80.121:6380 master - 0 1480417100630 2 connected 5461-10922

b2e0265c1ae983c339eaa362235455d3cc54a025 192.168.80.121:6379 myself,master - 0 0 1 connected 0-5460

127.0.0.1:6379> 

127.0.0.1:6379> cluster slots

1) 1) (integer) 10923

   2) (integer) 16383

   3) 1) "192.168.80.121"

      2) (integer) 6381

   4) 1) "192.168.80.121"

      2) (integer) 6384

2) 1) (integer) 5461

   2) (integer) 10922

   3) 1) "192.168.80.121"

      2) (integer) 6380

   4) 1) "192.168.80.121"

      2) (integer) 6383

3) 1) (integer) 0

   2) (integer) 5460

   3) 1) "192.168.80.121"

      2) (integer) 6379

   4) 1) "192.168.80.121"

      2) (integer) 6382

四、告警处理

1.告警 

7702:M 29 Nov 18:36:50.952 # WARNING: The TCP backlog setting of 511 cannot be enforced 

because /proc/sys/net/core/somaxconn is set to the lower value of 128.

7702:M 29 Nov 18:36:50.952 # Server started, Redis version 3.0.7

7702:M 29 Nov 18:36:50.952 # WARNING overcommit_memory is set to 0! Background save may fail under low memory condition. To fix this issue add 'vm.overcommit_memory = 1' to /etc/sysctl.conf and then reboot or run the command 'sysctl vm.overcommit_memory=1' for this to take effect.

7702:M 29 Nov 18:36:50.952 # WARNING you have Transparent Huge Pages (THP) support enabled in your kernel. This will create latency and memory usage issues with Redis. 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 be restarted after THP is disabled.

2.处理方法 

1)backlog

echo 511 >/proc/sys/net/core/somaxconn

echo "net.core.somaxconn = 511" >> /etc/sysctl.conf

2)overcommit_memory

echo 1 > /proc/sys/vm/overcommit_memory 

echo "vm.overcommit_memory=1" >> /etc/sysctl.conf

3)Transparent Huge Pages (THP)

echo never > /sys/kernel/mm/transparent_hugepage/enabled

vi /etc/rc.local  

if test -f /sys/kernel/mm/transparent_hugepage/enabled; then  

   echo never > /sys/kernel/mm/transparent_hugepage/enabled  

fi  

if test -f /sys/kernel/mm/transparent_hugepage/defrag; then  

   echo never > /sys/kernel/mm/transparent_hugepage/defrag  

fi  

sysctl -p 

本文转自 roidba 51CTO博客，原文链接：http://blog.51cto.com/roidba/1877894，如需转载请自行联系原作者