[CentOS] Redis 설치

 

 

 

1. Redis 설치

 

설치할 CentOS 서버에 Redis가 설치되어 있는지 확인한다.

$ redis-server --version
-bash: redis-server: command not found

※ 레디스가 설치되어 있다면 위와같이 command not found 메시지를 나타낼 것이다.

 

 

 

Redis가 설치되어 있지 않다면 아래 명령을 통해 Redis를 설치한다.

 $ sudo yum install -y redis
Loaded plugins: fastestmirror
Loading mirror speeds from cached hostfile
 * base: mirror.kakao.com
 * epel: mirror-nrt.yuki.net.uk
 * extras: mirror.kakao.com
 * updates: mirror.kakao.com
Resolving Dependencies
--> Running transaction check
---> Package redis.x86_64 0:3.2.12-2.el7 will be installed
--> Processing Dependency: libjemalloc.so.1()(64bit) for package: redis-3.2.12-2.el7.x86_64
--> Running transaction check
---> Package jemalloc.x86_64 0:3.6.0-1.el7 will be installed
--> Finished Dependency Resolution

Dependencies Resolved

=========================================================================================================================================================================== Package                                  Arch                                   Version                                        Repository                            Size
===========================================================================================================================================================================Installing:
 redis                                    x86_64                                 3.2.12-2.el7                                   epel                                 544 k
Installing for dependencies:
 jemalloc                                 x86_64                                 3.6.0-1.el7                                    epel                                 105 k

Transaction Summary
===========================================================================================================================================================================Install  1 Package (+1 Dependent package)

Total download size: 648 k
Installed size: 1.7 M
Downloading packages:
(1/2): jemalloc-3.6.0-1.el7.x86_64.rpm                                                                                                              | 105 kB  00:00:00     
(2/2): redis-3.2.12-2.el7.x86_64.rpm                                                                                                                | 544 kB  00:00:00     
---------------------------------------------------------------------------------------------------------------------------------------------------------------------------Total                                                                                                                                      1.1 MB/s | 648 kB  00:00:00     
Running transaction check
Running transaction test
Transaction test succeeded
Running transaction
Warning: RPMDB altered outside of yum.
  Installing : jemalloc-3.6.0-1.el7.x86_64                                                                                                                             1/2 
  Installing : redis-3.2.12-2.el7.x86_64                                                                                                                               2/2 
  Verifying  : redis-3.2.12-2.el7.x86_64                                                                                                                               1/2 
  Verifying  : jemalloc-3.6.0-1.el7.x86_64                                                                                                                             2/2 

Installed:
  redis.x86_64 0:3.2.12-2.el7                                                                                                                                              

Dependency Installed:
  jemalloc.x86_64 0:3.6.0-1.el7                                                                                                                                            

Complete!

 

 

 

설치가 완료되면 Redis 서비스 시작한다.

$ sudo systemctl start redis

 

 

 

이후 CentOS7 재부팅시 Rdis 서비스가 자동 실행되게 설정을 잡아준다.

$ sudo systemctl enable redis
Created symlink from /etc/systemd/system/multi-user.target.wants/redis.service to /usr/lib/systemd/system/redis.service.

 

 

---

 

 

2. Reids 클라이언트 확인

 

 

Redis 설치가 완료되면 Redis 클라이언트를 실행하여 정상 작동 유무를 확인한다.

 

 

Reids 콘솔 접속

$ redis-cli
127.0.0.1:6379>

Reids 콘솔이 열리면 정상적으로 연결된 것이다.

 

 

127.0.0.1:6792> ping
PING

`PING 이라는 응답을 받으면 정상

 

127.0.0.1:6379> set testkey "Hello, Redis!"
OK

`OK` 라는 응답을 받으면 정상

 

127.0.0.1:6379> get testkey
"Hello, Redis!"

`Hello, Redis!` 라는 응답을 받으면 정상

 

 

 

 

Redis 클라이언트 종료

 

127.0.0.1:6379> exit

 

 

 

---

 

 

 

3. Redis 외부 연결 허용

 

 

CentOS7 서버의 Redis에 대하여 외부 접근을 허용하려면 몇가지 구성이 필요하다.

 

 

1) 방화벽 설정에 Redis 서비스 PORT( 6379 ) 예외 처리

 

방화벽에 Redis 기본 포트인 6379 포트를 추가하여 준다.

$ sudo firewall-cmd --zone=public --add-port=6379/tcp --permanent
success

 

 

방화벽 재시작

$ sudo firewall-cmd --reload
success

 

 

 

2) Redis 구성 파일 수정

 

 

Redis 구성파일( `/etc/reids.conf` )을 수정하여 외부에서의 연결을 허용한다.

$ sudo vim /etc/redis.conf

  ~~ 이 하 생 략 ~~

################################## NETWORK #####################################

# By default, if no "bind" configuration directive is specified, Redis listens
# for connections from all the network interfaces available on the server.
# It is possible to listen to just one or multiple selected interfaces using
# the "bind" configuration directive, followed by one or more IP addresses.
#
# Examples:
#
# bind 192.168.1.100 10.0.0.1
# bind 127.0.0.1 ::1
#
# ~~~ WARNING ~~~ If the computer running Redis is directly exposed to the
# internet, binding to all the interfaces is dangerous and will expose the
# instance to everybody on the internet. So by default we uncomment the
# following bind directive, that will force Redis to listen only into
# the IPv4 lookback interface address (this means Redis will be able to
# accept connections only from clients running into the same computer it
# is running).
#
# IF YOU ARE SURE YOU WANT YOUR INSTANCE TO LISTEN TO ALL THE INTERFACES
# JUST COMMENT THE FOLLOWING LINE.
# ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
#bind 127.0.0.1
bind 0.0.0.0

# Protected mode is a layer of security protection, in order to avoid that
# Redis instances left open on the internet are accessed and exploited.
#
# When protected mode is on and if:
#
# 1) The server is not binding explicitly to a set of addresses using the
#    "bind" directive.
# 2) No password is configured.
#
# The server only accepts connections from clients connecting from the
# IPv4 and IPv6 loopback addresses 127.0.0.1 and ::1, and from Unix domain
# sockets.
#
# By default protected mode is enabled. You should disable it only if
# you are sure you want clients from other hosts to connect to Redis
# even if no authentication is configured, nor a specific set of interfaces
# are explicitly listed using the "bind" directive.
#protected-mode yes
protected-mode no

# Accept connections on the specified port, default is 6379 (IANA #815344).
# If port 0 is specified Redis will not listen on a TCP socket.
port 6379

  ~~ 이 하 생 략 ~~
  
################################## SECURITY ###################################

# Require clients to issue AUTH <PASSWORD> before processing any other
# commands.  This might be useful in environments in which you do not trust
# others with access to the host running redis-server.
#
# This should stay commented out for backward compatibility and because most
# people do not need auth (e.g. they run their own servers).
#
# Warning: since Redis is pretty fast an outside user can try up to
# 150k passwords per second against a good box. This means that you should
# use a very strong password otherwise it will be very easy to break.
#
# requirepass foobared
requirepass 사용자지정_비밀번호


  ~~ 이 하 생 략 ~~

bind	0.0.0.0
protected-mode	no
requirepass	사용자지정_비밀번호

 

`bind`를 0.0.0.0으로 설정하면 모둔 IP주소에대하여 연결이 허용되며,

 

`protected-mode`를 no로 설정하면 외부에서의 접근이 가능하다.

 

`requirepass` 설정을 통해 비밀번호를 설정할 수 있다.

 

 

 

마지막으로 Reids 서비스 재시작 해준다.

$ sudo systemctl restart redis