Install Redis

sudo yum update
sudo yum install epel-release
sudo yum update
sudo yum install redis
start redis by
```
sudo systemctl start redis**
```

Start Redis on boot

  sudo systemctl enable redis

Verify Installation

Run the command

  redis-cli ping

in terminal, if redis is running, it will return PONG.

View redis status

  sudo systemctl status redis.service

Restart redis

  sudo systemctl restart redis

Set key-value to redis

  
  root@redis-node:~# redis-cli
  127.0.0.1:6379> set besthost "Globo.Tech"
  OK
  127.0.0.1:6379> get besthost
  "Globo.Tech"
  

Config redis

redis configuration file is /etc/redis.conf

There is a article describes some redis configuration, following sections Persistence Option and Basic System Tuning are part of this site, please refer it.

Persistence Options

Redis provides two options for disk persistence:

Point-in-time snapshots of the dataset, made at specified intervals (RDB)
Append-only logs of all the write operations performed by the server (AOF)

For the greatest level of data safety, consider running both persistence methods.

Because the Point-in-time snapshot persistence is enabled by default, you only need to set up AOF persistence.

Basic System Tuning

To improve Redis performance, set the Linux kernel overcommit memory setting to 1 sudo sysctl vm.overcommit_memory=1, then add vm.overcommit_memory = 1 to /etc/sysctl.conf

Bound redis to local IP

We need to ensure that Redis is bounded to the local IP. Unless you are running a full Redis cluster, this is the best way to secure your Redis store from unauthorized access.

nano /etc/redis.conf
Search for the line that begins with “bind”, changing it as follows: bind 127.0.0.1

Access redis from other computer

modify firewall to make it allow redis port

firewall-cmd --add-port=6379/tcp --permanent
firewall-cmd --reload

modify redis conf file

set
```
protected-mode = no
```
and comment
```
bind 127.0.0.1
```
in /etc/redis.conf, restart redis
use nc command in terminal at other linux based computer or use desktop manager
```
nc -v --ssl redis.mydomain.com 6379
```
or
```
nc -v redis.mydomain.com 6379
```

Written on December 24, 2017