How to install Redis on CENTOS7

Unzip

Tar zxvf redis-3.0.4.tar.gz

Enter the extracted directory

CD redis-3.0.4

compiling source files with make

Make

Installation

Enter the directory of the source file

CD src

Replicating Redis servers and clients to/usr/local/bin

CP Redis-server Redis-cli/usr/local/bin

It's better to copy the Sentinel,benchmark and check.

CP Redis-sentinel Redis-benchmark redis-check-aof Redis-check-dump/usr/local/bin

Create a Redis configuration folder

Mkdir/etc/redis

Create a valid directory for saving data under/var/lib/redis

Mkdir-p/var/lib/redis/6379

System parameters

To configure some kernel parameters for Redis to work properly

The configuration vm.overcommit_memory is 1, which prevents data from being truncated, as detailed in this

Sysctl-w Vm.overcommit_memory=1

The maximum number of modified backlog connections exceeds the Tcp-backlog value in Redis.conf, which is the default value of 511. You can find more information about the SYSCTL-based IP network tunnel in kernel.org

Sysctl-w net.core.somaxconn=512

Cancels support for transparent giant page memory (transparent huge pages) because it causes a delay in Redis usage and memory access issues

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

Redis.conf

Redis.conf is a Redis profile, however you will see that the file name is 6379.conf, and this number is the network port that Redis listens to. If you want to run more than one Redis instance, it is recommended to use such a name.

Copy the redis.conf of the sample to /etc/redis/6379.conf

CP redis.conf/etc/redis/6379.conf

Now edit this file and configure the parameters

Daemonize

Setting Daemonize to NO,SYSTEMD requires it to run in the foreground, or Redis will suddenly hang up.

Daemonize No

Pidfile

Set Pidfile to/var/run/redis_6379.pid

Pidfile/var/run/redis_6379.pid

Port

If you are not ready to use the default port, you can modify

Port 6379

LogLevel

Setting the log level

LogLevel Notice

LogFile

To modify the log file path

Logfile/var/log/redis_6379.log

Dir

Set Directory to/var/lib/redis/6379

dir/var/lib/redis/6379

Safety

Here are a few things that can improve security

Unix sockets

In many cases, client programs and server-side programs run on the same machine, so there is no need to listen for sockets on the network. If this is similar to your usage, you can use a UNIX socket instead of a network socket, you need to configure Port 0, and then configure the options below to enable the UNIX socket.

Set up a socket file for a UNIX socket

Unixsocket/tmp/redis.sock

Restricting permissions on socket files

Unixsocketperm 700

Now in order for REDIS-CLI to be accessible, you should use the-s parameter to point to the socket file

Redis-cli-s/tmp/redis.sock

Requirepass

You may need remote access, if yes, then you should set the password, which will require a password before each operation

Requirepass "BTFBX1NYYWRMTUEYNHHSCG"

Rename-command

Imagine the output of the following command. Yes, this will output the configuration of the server, so you should deny this access in any possible circumstances.

CONFIG GET *

In order to restrict or even prohibit this or other instructions you can use the Rename-command command. You must provide a command name and alternate name. To disallow it, you need to set an alternate name to an empty string, which prevents anyone from guessing that the name of the command is safe.

Rename-command flushdb "flushdb_my_salt_g0es_here09u09u" Rename-command flushall "" Rename-command CONFIG "CONFIG_MY_ S4lt_go3s_here09u09u "

Snapshot

By default, Redis periodically dumps datasets to the dump.rdb file in the directory we set up. You can use the Save command to configure the frequency of the dump, its first parameter is the time frame in seconds, and the second parameter is the number of modifications made on the data file.

Every 15 minutes and a minimum of one key change

Save 900 1

Every 5 minutes and at least 10 keys have been modified

Save 300 10

Every 1 minutes and at least 10,000 keys have been modified

Save 60 10000

Start up at boot time

You can use SYSTEMD to add Redis to the system boot list

Copy the sample Init_script file to/ETC/INIT.D, and note the port number that the script name represents

CP utils/redis_init_script/etc/init.d/redis_6379

Now we're going to use SYSTEMD, so create a unit file under/etc/systems/system named Redis_6379.service

Vi/etc/systemd/system/redis_6379.service

[Unit] Description=redis on port 6379[service]type=forkingexecstart=/etc/init.d/redis_6379 startexecstop=/etc/init.d/ redis_6379 Stop[install]wantedby=multi-user.target

So you can start, and by setting these options you can deploy the Redis service to a lot of simple scenarios

How to install Redis on CENTOS7