[Docker] How to install Docker on CentOS 7

1. Docker 설치

[root@localhost ~]# yum install yum-utils
[root@localhost ~]# yum-config-manager --add-repo https://download.docker.com/linux/centos/docker-ce.repo                       Loaded plugins: fastestmirror, langpacks
adding repo from: https://download.docker.com/linux/centos/docker-ce.repo
grabbing file https://download.docker.com/linux/centos/docker-ce.repo to /etc/yum.repos.d/docker-ce.repo
repo saved to /etc/yum.repos.d/docker-ce.repo
[root@localhost ~]# yum -y install docker-ce
[root@localhost ~]# rpm -qa | grep docker
docker-ce-20.10.2-3.el7.x86_64
docker-ce-cli-20.10.2-3.el7.x86_64
docker-ce-rootless-extras-20.10.2-3.el7.x86_64
[root@localhost ~]# systemctl start docker
[root@localhost ~]# systemctl enable docker
Created symlink from /etc/systemd/system/multi-user.target.wants/docker.service to /usr/lib/systemd/system/docker.service.
[root@localhost ~]# systemctl status docker
● docker.service - Docker Application Container Engine
   Loaded: loaded (/usr/lib/systemd/system/docker.service; enabled; vendor preset: disabled)
   Active: active (running) since Sat 2021-01-30 10:28:13 EST; 43s ago
     Docs: https://docs.docker.com
 Main PID: 55967 (dockerd)
   CGroup: /system.slice/docker.service
           └─55967 /usr/bin/dockerd -H fd:// --containerd=/run/containerd/containerd.sock
[root@localhost ~]# docker version
Client: Docker Engine - Community
 Version:           20.10.2
 API version:       1.41
 Go version:        go1.13.15
 Git commit:        2291f61
 Built:             Mon Dec 28 16:17:48 2020
 OS/Arch:           linux/amd64
 Context:           default
 Experimental:      true

Server: Docker Engine - Community
 Engine:
  Version:          20.10.2
  API version:      1.41 (minimum version 1.12)
  Go version:       go1.13.15
  Git commit:       8891c58
  Built:            Mon Dec 28 16:16:13 2020
  OS/Arch:          linux/amd64
  Experimental:     false
 containerd:
  Version:          1.4.3
  GitCommit:        269548fa27e0089a8b8278fc4fc781d7f65a939b
 runc:
  Version:          1.0.0-rc92
  GitCommit:        ff819c7e9184c13b7c2607fe6c30ae19403a7aff
 docker-init:
  Version:          0.19.0
  GitCommit:        de40ad0

 

2. Docker 컨테이너 생성

[root@localhost ~]# docker pull mariadb
*/ docker pull 이미지명 : 저장소에서 이미지 가져오기 /*  
Using default tag: latest
latest: Pulling from library/mariadb
83ee3a23efb7: Pull complete
db98fc6f11f0: Pull complete
f611acd52c6c: Pull complete
aa2333e25466: Pull complete
f53ac4b825fd: Pull complete
c20afcf9b055: Pull complete
54c5dc6dcf19: Pull complete
b1c71d744483: Pull complete
863a8cc01d1c: Pull complete
5d1a793b093f: Pull complete
477cd2b3eba8: Pull complete
402454543166: Pull complete
Digest: sha256:8040983db146f729749081c6b216a19d52e0973134e2e34c0b4fd87f48bc15b0
Status: Downloaded newer image for mariadb:latest
docker.io/library/mariadb:latest
[root@localhost ~]# docker images
REPOSITORY   TAG       IMAGE ID       CREATED      SIZE
mariadb      latest    ade39f0469a3   9 days ago   407MB

 

# docker run --name mariadb-basic