[DOCKER] 설치

도커 설치방법 

• Repository를 이용한설치
• Download 후 직접설치 
• Script를 이용한설치

회사에서는 설치시 외부 인터넷망이 접근이 안되기 때문에 수동으로 다운받아서 직접 설치하지만, 일반적으로는 Repository를 이용하여 설치함

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Repository를 이용해서 설치

Docker.com에서 docker package를 저장하는 Repository를 이용하여 실시간으로 다운받아서 설치

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Centos 환경에서 Docker 설치방법

• Repository 설정
• Docker 엔진 설치
• Docker 구동

Root 계정으로 설치를 진행하였음

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Respository 설정

-- 패키지 설치, 최신버전 설치 확인
[root@plat02 ~]# yum install -y yum-utils
Loaded plugins: fastestmirror, langpacks, product-id, search-disabled-repos, subscription-manager

This system is not registered with an entitlement server. You can use subscription-manager to register.

Loading mirror speeds from cached hostfile
 * base: mirror.navercorp.com
 * extras: mirror.navercorp.com
 * updates: mirror.navercorp.com
Package yum-utils-1.1.31-54.el7_8.noarch already installed and latest version
Nothing to do

-- Repository url 등록 
[root@plat02 ~]# yum-config-manager \
>     --add-repo \
>     https://download.docker.com/linux/centos/docker-ce.repo
Loaded plugins: fastestmirror, langpacks, product-id, subscription-manager

This system is not registered with an entitlement server. You can use subscription-manager to register.

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


-- Docker 엔진 설치 진행
[root@plat02 ~]# yum install docker-ce docker-ce-cli containerd.io
Loaded plugins: fastestmirror, langpacks, product-id, search-disabled-repos, subscription-manager

This system is not registered with an entitlement server. You can use subscription-manager to register.

Loading mirror speeds from cached hostfile
 * base: mirror.navercorp.com
 * extras: mirror.navercorp.com
 * updates: mirror.navercorp.com
docker-ce-stable                                                                                                                  | 3.5 kB  00:00:00
(1/2): docker-ce-stable/7/x86_64/updateinfo                                                                                       |   55 B  00:00:00
(2/2): docker-ce-stable/7/x86_64/primary_db                                                                                       |  67 kB  00:00:00
Resolving Dependencies
There are unfinished transactions remaining. You might consider running yum-complete-transaction, or "yum-complete-transaction --cleanup-only" and "yum history redo last", first to finish them. If those don't work you'll have to try removing/installing packages by hand (maybe package-cleanup can help).
--> Running transaction check
---> Package containerd.io.x86_64 0:1.4.11-3.1.el7 will be installed
---> Package docker-ce.x86_64 3:20.10.10-3.el7 will be installed
--> Processing Dependency: docker-ce-rootless-extras for package: 3:docker-ce-20.10.10-3.el7.x86_64
---> Package docker-ce-cli.x86_64 1:20.10.10-3.el7 will be installed

• 패키지 설치 및 확인
• Docker Repository URL 등록
• Docker 엔진 설치 진행

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Docker 구동

Centos의 경우 서비스 데몬을 시작해줘야함

-- 도커 서비스 데몬 실행 및 도커 버전 확인
[root@plat02 ~]# systemctl start docker
[root@plat02 ~]# docker version
Client: Docker Engine - Community
 Version:           20.10.10
 API version:       1.41
 Go version:        go1.16.9
 Git commit:        b485636
 Built:             Mon Oct 25 07:44:50 2021
 OS/Arch:           linux/amd64
 Context:           default
 Experimental:      true

Server: Docker Engine - Community
 Engine:
  Version:          20.10.10
  API version:      1.41 (minimum version 1.12)
  Go version:       go1.16.9
  Git commit:       e2f740d
  Built:            Mon Oct 25 07:43:13 2021
  OS/Arch:          linux/amd64
  Experimental:     false
 containerd:
  Version:          1.4.11
  GitCommit:        5b46e404f6b9f661a205e28d59c982d3634148f8
 runc:
  Version:          1.0.2
  GitCommit:        v1.0.2-0-g52b36a2
 docker-init:
  Version:          0.19.0
  GitCommit:        de40ad0
  
-- 데몬 시스템 재부팅시 실행되도록 설정 
[root@plat02 ~]# systemctl enable docker
Created symlink from /etc/systemd/system/multi-user.target.wants/docker.service to /usr/lib/systemd/system/docker.service.