redis编译安装
1.编译安装
准备工作
# yum install gcc gcc++ make -y
1.1获取redis安装包并进行安装
# wget http://download.redis.io/releases/redis-4.0.14.tar.gz
# tar xzf redis-4.0.14.tar.gz
# cd redis-4.0.14
# make PREFIX=/usr/local/redis install
# mkdir -pv /usr/local/redis/etc
# cp redis.conf /usr/local/redis/etc/
1.2前台启动redis
# /usr/local/redis/bin/redis-server /usr/local/redis/etc/redis.conf
3824:C 13 Feb 10:51:23.699 # oO0OoO0OoO0Oo Redis is starting oO0OoO0OoO0Oo
3824:C 13 Feb 10:51:23.699 # Redis version=4.0.14, bits=64, commit=00000000, modified=0, pid=3824, just started
3824:C 13 Feb 10:51:23.699 # Configuration loaded
3824:M 13 Feb 10:51:23.700 * Increased maximum number of open files to 10032 (it was originally set to 1024).
_._
_.-``__ ‘‘-._
_.-`` `. `_. ‘‘-._ Redis 4.0.14 (00000000/0) 64 bit
.-`` .-```. ```\/ _.,_ ‘‘-._
( ‘ , .-` | `, ) Running in standalone mode
|`-._`-...-` __...-.``-._|‘` _.-‘| Port: 6379
| `-._ `._ / _.-‘ | PID: 3824
`-._ `-._ `-./ _.-‘ _.-‘
|`-._`-._ `-.__.-‘ _.-‘_.-‘|
| `-._`-._ _.-‘_.-‘ | http://redis.io
`-._ `-._`-.__.-‘_.-‘ _.-‘
|`-._`-._ `-.__.-‘ _.-‘_.-‘|
| `-._`-._ _.-‘_.-‘ |
`-._ `-._`-.__.-‘_.-‘ _.-‘
`-._ `-.__.-‘ _.-‘
`-._ _.-‘
`-.__.-‘1.3验证
# /usr/local/redis/bin/redis-cli
redis> set foo bar
OK
redis> get foo
"bar"
1.4解决当前的警告提示：
1.4.1.tcp-backlog：
Thebacklogargument defines the maximum length to which the queue of pending connections forsockfdmay grow. If a connection request arrives when the queue is full, the client may receive an error with an indication ofECONNREFUSEDor, if the underlying protocol supports retransmission, the request may be ignored so that a later reattempt at connection succeeds.
backlog参数控制的是三次握手的时候server端收到client ack确认号之后的队列值。
# echo ‘net.core.somaxconn = 512‘ >>/etc/sysctl.conf
# sysctl -p
1.4.2.vm.overcommit_memory：
0、表示内核将检查是否有足够的可用内存供应用进程使用；如果有足够的可用内存，内存申请允许；否则，内存申请失败，并把错误返回给应用进程。
1、表示内核允许分配所有的物理内存，而不管当前的内存状态如何。
2、表示内核允许分配超过所有物理内存和交换空间总和的内存
# echo ‘vm.overcommit_memory = 1‘ >>/etc/sysctl.conf
# sysctl -p
1.4.3.transparenthugepage：
开启大页内存动态分配，需要关闭让redis 负责内存管理。
echo never > /sys/kernel/mm/transparent_hugepage/enabled
再次启动redis：
将以上配置同步到其他redis 服务器。redis服务器报错问题都解决了。
2编译安装后的一些优化操作
2.1编辑redis服务启动脚本:
# cat /usr/lib/systemd/system/redis.service
[Unit]
Description=Redis persistent key-value database
After=network.target
After=network-online.target
Wants=network-online.target
[Service]
#ExecStart=/usr/bin/redis-server /etc/redis.conf --supervised systemd
ExecStart=/usr/local/redis/bin/redis-server /usr/local/redis/etc/redis.conf --supervised systemd
ExecReload=/bin/kill -s HUP $MAINPID
ExecStop=/bin/kill -s QUIT $MAINPID
Type=notify
User=redis
Group=redis
RuntimeDirectory=redis
RuntimeDirectoryMode=0755
[Install]
WantedBy=multi-user.target
2.2创建redis 用户和数据目录：
# groupadd -g 1001 redis && useradd -u 1001 -g 1001 redis -s /sbin/nologin
# mkdir -pv /usr/local/redis/{etc,logs,data,run}
# chown redis.redis -R /usr/local/redis/ #注意目录权限
2.3：验证redis 启动：
# systemctl daemon-reload
# systemctl start redis
# systemctl status redis
● redis.service - Redis persistent key-value database
Loaded: loaded (/usr/lib/systemd/system/redis.service; disabled; vendor preset: disabled)
Active: active (running) since Thu 2020-02-13 11:12:26 CST; 5s ago
Main PID: 3986 (redis-server)
CGroup: /system.slice/redis.service
└─3986 /usr/local/redis/bin/redis-server 127.0.0.1:6379
Feb 13 11:12:26 redis-vm1.novalocal redis-server[3986]: | `-._`-._ _.-‘_.-‘ | http://redis.io
Feb 13 11:12:26 redis-vm1.novalocal redis-server[3986]: `-._ `-._`-.__.-‘_.-‘ _.-‘
Feb 13 11:12:26 redis-vm1.novalocal redis-server[3986]: |`-._`-._ `-.__.-‘ _.-‘_.-‘|
Feb 13 11:12:26 redis-vm1.novalocal redis-server[3986]: | `-._`-._ _.-‘_.-‘ |
Feb 13 11:12:26 redis-vm1.novalocal redis-server[3986]: `-._ `-._`-.__.-‘_.-‘ _.-‘
Feb 13 11:12:26 redis-vm1.novalocal redis-server[3986]: `-._ `-.__.-‘ _.-‘
Feb 13 11:12:26 redis-vm1.novalocal redis-server[3986]: `-._ _.-‘
Feb 13 11:12:26 redis-vm1.novalocal redis-server[3986]: `-.__.-‘
Feb 13 11:12:26 redis-vm1.novalocal redis-server[3986]: 3986:M 13 Feb 11:12:26.149 # Server initialized
Feb 13 11:12:26 redis-vm1.novalocal redis-server[3986]: 3986:M 13 Feb 11:12:26.150 * Ready to accept connections
# netstat -tnlp
Active Internet connections (only servers)
Proto Recv-Q Send-Q Local Address Foreign Address State PID/Program name
tcp 0 0 127.0.0.1:6379 0.0.0.0:* LISTEN 3986/redis-server 1
tcp 0 0 0.0.0.0:22 0.0.0.0:* LISTEN 3314/sshd
tcp 0 0 127.0.0.1:25 0.0.0.0:* LISTEN 3281/master
tcp6 0 0 :::22 :::* LISTEN 3314/sshd
tcp6 0 0 ::1:25 :::* LISTEN 3281/master
# ps -ef | grep redis
redis 4286 1 0 11:38 ? 00:00:00 /usr/local/redis/bin/redis-server 127.0.0.1:6379
# /usr/local/redis/bin/redis-cli
127.0.0.1:6379> info
# Server
redis_version:4.0.14
redis_git_sha1:00000000
redis_git_dirty:0
redis_build_id:442b337a2f108655
redis_mode:standalone
os:Linux 3.10.0-957.el7.x86_64 x86_64
arch_bits:64
multiplexing_api:epoll
atomicvar_api:atomic-builtin
gcc_version:4.8.5
process_id:3986
run_id:3e87c0ea4a1e1dafe1379933bd713f6472e356ec
tcp_port:6379
uptime_in_seconds:119
uptime_in_days:0
2.4使用客户端连接redis：
#/usr/local/redis/bin/redis-cli -h IP/HOSTNAME -p PORT -a PASSWORD
2.2.2.8：创建命令软连接：
# ln -sv /usr/local/redis/bin/redis-* /usr/bin/
‘/usr/bin/redis-benchmark’ -> ‘/usr/local/redis/bin/redis-benchmark’
‘/usr/bin/redis-check-aof’ -> ‘/usr/local/redis/bin/redis-check-aof’
‘/usr/bin/redis-check-rdb’ -> ‘/usr/local/redis/bin/redis-check-rdb’
‘/usr/bin/redis-cli’ -> ‘/usr/local/redis/bin/redis-cli’
‘/usr/bin/redis-sentinel’ -> ‘/usr/local/redis/bin/redis-sentinel’
‘/usr/bin/redis-server’ -> ‘/usr/local/redis/bin/redis-server’
2.5编译安装后的命令：
[ ~]# ll /usr/local/redis/bin/
total 32656
-rwxr-xr-x 1 redis redis 4365488 Dec 13 09:21 redis-benchmark #redis性能测试工具
-rwxr-xr-x 1 redis redis 8088920 Dec 13 09:21 redis-check-aof #AOF文件检查工具
-rwxr-xr-x 1 redis redis 8088920 Dec 13 09:21 redis-check-rdb #RDB文件检查工具
-rwxr-xr-x 1 redis redis 4800752 Dec 13 09:21 redis-cli #redis #客户端工具
lrwxrwxrwx 1 redis redis 12 Dec 13 09:21 redis-sentinel -> redis-server #哨兵，软连接到
server
-rwxr-xr-x 1 redis redis 8088920 Dec 13 09:21 #redis-server #redis 服务端
2.6修改配置文件/usr/local/redis/etc/redis.conf以便客户端远程连接
bind 0.0.0.0#监听地址，可以用空格隔开后多个监听IP，默认配置是127.0.0.1，远程客户端无法连接redis服务
# redis-cli -h 172.16.99.127 -p 6379
172.16.99.127:6379> set foo bar
OK
172.16.99.127:6379> get foo
"bar"
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