Redis单点搭建

Redis 单点部署

服务器信息

ip	系统	配置	目录
172.24.32.200	centos7.7	2c4g	/data/redis/

部署

官网

https://redis.io/topics/quickstart

1、单机部署

关闭防火墙

sed -i 's/^SELINUX=.*/SELINUX=disabled/' /etc/selinux/config
setenforce 0
systemctl stop firewalld
systemctl disable firewalld

安装依赖

yum install wget vim net-tools gcc -y

创建目录

mkdir -p /data/redis && cd /data/redis

wget http://download.redis.io/redis-stable.tar.gz
tar xvzf redis-stable.tar.gz
cd redis-stable

踩坑1

cd src && make all
make[1]: Entering directory `/data/redis/redis-stable/src'
    CC adlist.o
In file included from adlist.c:34:0:
zmalloc.h:50:31: fatal error: jemalloc/jemalloc.h: No such file or directory
 #include <jemalloc/jemalloc.h>
                               ^
compilation terminated.
make[1]: *** [adlist.o] Error 1
make[1]: Leaving directory `/data/redis/redis-stable/src'
make: *** [all] Error 2

查看README

Allocator
---------

Selecting a non-default memory allocator when building Redis is done by setting
the `MALLOC` environment variable. Redis is compiled and linked against libc
malloc by default, with the exception of jemalloc being the default on Linux
systems. This default was picked because jemalloc has proven to have fewer
fragmentation problems than libc malloc.

To force compiling against libc malloc, use:

    % make MALLOC=libc

To compile against jemalloc on Mac OS X systems, use:

    % make MALLOC=jemalloc

Verbose build

重新编译

 make MALLOC=libc

踩坑2

                        ^
server.c:5117:15: error: ‘struct redisServer’ has no member named ‘maxmemory’
     if (server.maxmemory > 0 && server.maxmemory < 1024*1024) {
               ^
server.c:5117:39: error: ‘struct redisServer’ has no member named ‘maxmemory’
     if (server.maxmemory > 0 && server.maxmemory < 1024*1024) {
                                       ^
server.c:5118:176: error: ‘struct redisServer’ has no member named ‘maxmemory’
         serverLog(LL_WARNING,"WARNING: You specified a maxmemory value that is less than 1MB (current value is %llu bytes). Are you sure this is what you really want?", server.maxmemory);
                                                                                                                                                                                ^
server.c: In function ‘hasActiveChildProcess’:

查看gcc版本并且升级

[root@localhost redis-stable]# gcc -v
Using built-in specs.
COLLECT_GCC=gcc
COLLECT_LTO_WRAPPER=/usr/libexec/gcc/x86_64-redhat-linux/4.8.5/lto-wrapper
Target: x86_64-redhat-linux
Configured with: ../configure --prefix=/usr --mandir=/usr/share/man --infodir=/usr/share/info --with-bugurl=http://bugzilla.redhat.com/bugzilla --enable-bootstrap --enable-shared --enable-threads=posix --enable-checking=release --with-system-zlib --enable-__cxa_atexit --disable-libunwind-exceptions --enable-gnu-unique-object --enable-linker-build-id --with-linker-hash-style=gnu --enable-languages=c,c++,objc,obj-c++,java,fortran,ada,go,lto --enable-plugin --enable-initfini-array --disable-libgcj --with-isl=/builddir/build/BUILD/gcc-4.8.5-20150702/obj-x86_64-redhat-linux/isl-install --with-cloog=/builddir/build/BUILD/gcc-4.8.5-20150702/obj-x86_64-redhat-linux/cloog-install --enable-gnu-indirect-function --with-tune=generic --with-arch_32=x86-64 --build=x86_64-redhat-linux
Thread model: posix
gcc version 4.8.5 20150623 (Red Hat 4.8.5-39) (GCC)

升级gcc

yum -y install centos-release-scl
yum -y install devtoolset-9-gcc devtoolset-9-gcc-c++ devtoolset-9-binutils
##临时生效
scl enable devtoolset-9 bash
##永久生效
echo "source /opt/rh/devtoolset-9/enable" >>/etc/profile

重新编译

make && make install

2、修改配置文件

mkdir -p /etc/redis
cp redis.conf /etc/redis/redis_16379.conf
###绑定的ip
sed -i 's|bind 127.0.0.1|bind 172.24.32.200|g' /etc/redis/redis_16379.conf

###修改默认端口
sed -i 's|port 6379|port 16379|g' /etc/redis/redis_16379.conf

###守护进程
sed -i 's|daemonize no|daemonize yes|g' /etc/redis/redis_16379.conf

###加密码
sed -i '$arequirepass aj3jaHSk3n4' /etc/redis/redis_16379.conf

###redis日志
sed -i 's|logfile ""|logfile "/var/log/redis.log"|g' /etc/redis/redis_16379.conf

启动文件

cat >>/usr/lib/systemd/system/redis16379.service<<EOF
[Unit]
Description=redis16379
After=network.target

[Service]
Type=forking
PIDFile=/var/run/redis_16379.pid
ExecStart=/usr/local/bin/redis-server /etc/redis/redis_16379.conf
ExecReload=/bin/kill -s HUP $MAINPID
ExecStop=/bin/kill -s QUIT $MAINPID
PrivateTmp=true

[Install]
WantedBy=multi-user.target
EOF

启动和开机自启动

systemctl start redis16379
systemctl enable redis16379

查看/var/log/redis.log,解决告警

20627:M 10 May 2020 22:39:22.774 # WARNING: The TCP backlog setting of 511 cannot be enforced because /proc/sys/net/core/somaxconn is set to the lower value of 128.
20627:M 10 May 2020 22:39:22.774 # Server initialized
20627:M 10 May 2020 22:39:22.775 # 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.
20627:M 10 May 2020 22:39:22.775 # 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.
20627:M 10 May 2020 22:39:22.775 * Ready to accept connections

解决告警

echo 511 > /proc/sys/net/core/somaxconn
echo "net.core.somaxconn= 1024" >>/etc/sysctl.conf
sysctl -p
echo 'vm.overcommit_memory = 1' >> /etc/sysctl.conf
sysctl vm.overcommit_memory=1
echo never > /sys/kernel/mm/transparent_hugepage/enabled

开机自启动文件

cat>>/etc/rc.local<<EOF
##kernel
echo never > /sys/kernel/mm/transparent_hugepage/enabled
EOF

chmod +x /etc/rc.local