1.redis是單執行緒,高效能的key/value記憶體資料，基於記憶體執行並支援持久化的nosql資料庫
2.redis主要用來做快取,但不僅僅是做快取,例如：redis的計數器生成分布式唯一主鍵,redis實現分布式鎖,佇列,會話快取
安裝單節點redis
1、安裝gcc套裝：
yum install cpp
yum install binutils
yum install glibc
yum install glibc-kernheaders
yum install glibc-common
yum install glibc-devel
yum install gcc
yum install make
2、公升級gcc
yum -y install centos-release-scl
yum -y install devtoolset-9-gcc devtoolset-9-gcc-c++ devtoolset-9-binutils
scl enable devtoolset-9 bash
3、設定永久公升級：
echo "source /opt/rh/devtoolset-9/enable" >>/etc/profile
4、安裝redis：
wget
tar xzf redis-6.0.3.tar.gz
cd redis-6.0.3
make
make prefix=/usr/local/redis install
5、修改redis.conf以daemon執行
[root@vm-55fbfec9-2204-4954-90b1-67271ee7c4b0 bin]# grep daemon redis.conf
daemonize yes
6、啟動redis
./redis-server redis.conf
./redis-cli
[root@vm-55fbfec9-2204-4954-90b1-67271ee7c4b0 bin]# redis-cli
127.0.0.1:6379> ping
pong
#建立配置檔案
[root@vm-55fbfec9-2204-4954-90b1-67271ee7c4b0 kconfig]# cat redis6380.conf
include /usr/local/bin/kconfig/redis.conf
pidfile "/var/run/redis6380.pid"
port 6380
dbfilename "dump6380.rdb"
cluster-enabled yes
cluster-config-file node-6380.conf
cluster-node-timeout 15000
#啟動6個例項
[root@vm-55fbfec9-2204-4954-90b1-67271ee7c4b0 kconfig]# ps -ef|grep redis
root 31911 1 0 11:10 ? 00:00:02 redis-server 127.0.0.1:6380 [cluster]
root 31938 1 0 11:10 ? 00:00:02 redis-server 127.0.0.1:6381 [cluster]
root 31974 1 0 11:10 ? 00:00:02 redis-server 127.0.0.1:6382 [cluster]
root 32012 1 0 11:10 ? 00:00:02 redis-server 127.0.0.1:6390 [cluster]
root 32050 1 0 11:10 ? 00:00:02 redis-server 127.0.0.1:6391 [cluster]
root 32062 1 0 11:11 ? 00:00:02 redis-server 127.0.0.1:6392 [cluster]
#建立集群
redis-cli --cluster create 127.0.0.1:6380 127.0.0.1:6381 127.0.0.1:6382 127.0.0.1:6390 127.0.0.1:6391 127.0.0.1:6392 --cluster-replicas 1
#檢視集群狀態
[root@vm-55fbfec9-2204-4954-90b1-67271ee7c4b0 kconfig]# redis-cli -c -p 6380
127.0.0.1:6380> cluster nodes
9467d8a87b935deb57875689fccd4a22f5b44209 127.0.0.1:6391@16391 sl**e e59e4511ef9e2816c1a1fe8c89c17f4f8de5ae53 0 1595778201000 3 connected
43bebe3e0646119264ae865e508dfa5bfcedef36 127.0.0.1:6392@16392 sl**e 9e90af4a5f76f6d007a3e002285307286d17f5a6 0 1595778203817 1 connected
3926c5da0c5f32a114242ba1a4649d564af960ef 127.0.0.1:6390@16390 sl**e 353af028076bff70ebb69f9e9fb6cc057a1302e4 0 1595778202000 2 connected
e59e4511ef9e2816c1a1fe8c89c17f4f8de5ae53 127.0.0.1:6382@16382 master - 0 1595778202814 3 connected 10923-16383
9e90af4a5f76f6d007a3e002285307286d17f5a6 127.0.0.1:6380@16380 myself,master - 0 1595778203000 1 connected 0-5460
353af028076bff70ebb69f9e9fb6cc057a1302e4 127.0.0.1:6381@16381 master - 0 1595778201000 2 connected 5461-10922
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