[Openstack - Train] Centos에 설치하기(1) - Memcached 설정

Openstack에서 서비스의  ID인증 매커니즘은  Memcached를 사용하여 토큰을 캐시한다. 주로  Controller에 설치 되어 운영된다. 

 

 PKG Install 

[root@controller ~]#  yum install memcached python-memcached  -y
Loaded plugins: fastestmirror
Loading mirror speeds from cached hostfile
 * base: data.aonenetworks.kr
 * centos-ceph-nautilus: data.aonenetworks.kr
 * centos-nfs-ganesha28: data.aonenetworks.kr
 * centos-openstack-train: data.aonenetworks.kr
 * centos-qemu-ev: data.aonenetworks.kr
 * extras: data.aonenetworks.kr
 * updates: ftp.riken.jp
Resolving Dependencies
--> Running transaction check
---> Package memcached.x86_64 0:1.5.6-1.el7 will be installed
--> Processing Dependency: libevent-2.0.so.5()(64bit) for package: memcached-1.5.6-1.el7.x86_64
---> Package python-memcached.noarch 0:1.58-1.el7 will be installed
--> Running transaction check
---> Package libevent.x86_64 0:2.0.21-4.el7 will be installed
--> Finished Dependency Resolution

Dependencies Resolved

==================================================================================================================================================
 Package                             Arch                      Version                            Repository                                 Size
==================================================================================================================================================
Installing:
 memcached                           x86_64                    1.5.6-1.el7                        centos-openstack-train                    124 k
 python-memcached                    noarch                    1.58-1.el7                         centos-openstack-train                     38 k
Installing for dependencies:
 libevent                            x86_64                    2.0.21-4.el7                       base                                      214 k

Transaction Summary
==================================================================================================================================================
Install  2 Packages (+1 Dependent package)

Total download size: 376 k
Installed size: 1.1 M
Downloading packages:
(1/3): python-memcached-1.58-1.el7.noarch.rpm                                                                              |  38 kB  00:00:00
(2/3): memcached-1.5.6-1.el7.x86_64.rpm                                                                                    | 124 kB  00:00:00
(3/3): libevent-2.0.21-4.el7.x86_64.rpm                                                                                    | 214 kB  00:00:00
--------------------------------------------------------------------------------------------------------------------------------------------------
Total                                                                                                             554 kB/s | 376 kB  00:00:00
Running transaction check
Running transaction test
Transaction test succeeded
Running transaction
  Installing : libevent-2.0.21-4.el7.x86_64                                                                                                   1/3
  Installing : memcached-1.5.6-1.el7.x86_64                                                                                                   2/3
  Installing : python-memcached-1.58-1.el7.noarch                                                                                             3/3
  Verifying  : python-memcached-1.58-1.el7.noarch                                                                                             1/3
  Verifying  : libevent-2.0.21-4.el7.x86_64                                                                                                   2/3
  Verifying  : memcached-1.5.6-1.el7.x86_64                                                                                                   3/3

Installed:
  memcached.x86_64 0:1.5.6-1.el7                                       python-memcached.noarch 0:1.58-1.el7

Dependency Installed:
  libevent.x86_64 0:2.0.21-4.el7

Complete!

Config 수정 

[root@controller ~]# vi /etc/sysconfig/memcached
PORT="11211"
USER="memcached"
MAXCONN="1024"
CACHESIZE="64"
#OPTIONS="-l 127.0.0.1,::1"     ##아래와 같이 추가 또는 변경한다. 
OPTIONS="-l 127.0.0.1,::1,controller"

Daemon 시작

[root@controller ~]# systemctl enable memcached.service
Created symlink from /etc/systemd/system/multi-user.target.wants/memcached.service to /usr/lib/systemd/system/memcached.service.

[root@controller ~]# systemctl restart memcached.service

[root@controller ~]# systemctl status memcached.service
● memcached.service - memcached daemon
   Loaded: loaded (/usr/lib/systemd/system/memcached.service; enabled; vendor preset: disabled)
   Active: active (running) since 목 2019-10-31 17:30:44 KST; 4s ago
 Main PID: 7810 (memcached)
   CGroup: /system.slice/memcached.service
           └─7810 /usr/bin/memcached -p 11211 -u memcached -m 64 -c 1024 -l 127.0.0.1,::1,ibcontroller

10월 31 17:30:44 ibcontroller systemd[1]: Started memcached daemon.