在 CentOS 7.7 上安裝 Docker Engine（Install Docker Engine on CentOS 7.7）

安裝環境：CentOS Linux release 7.7.1908 (Core)
安裝版本：Docker version 19.03.8
部署人員：成長的小豬 Jason Song

目前市面上 Docker 很流行，我們要積極的瞭解起來哦，首先就是要把它安裝起來哦，然後我們一起探索

安裝方法

爲了簡化安裝和升級任務，這裏我推薦大家使用存儲庫安裝，首次安裝Docker Engine之前，需要設置Docker存儲庫，之後你可以從存儲庫進行安裝和更新Docker。

設置存儲庫

       1、安裝yum-utils軟件包（提供yum-config-manager 實用程序）並設置穩定的存儲庫

root@jasonsoft:~# sudo yum install -y yum-utils

       2、通過以下命令來設置穩定版本的存儲庫

root@jasonsoft:~# sudo yum-config-manager \
    --add-repo \
    https://download.docker.com/linux/centos/docker-ce.repo

現在我們就開安裝 DOCKER 引擎

     1、首先我們來更新apt程序包索引，並安裝最新版本的Docker Engine和容器

root@jasonsoft:~# sudo yum install -y docker-ce docker-ce-cli containerd.io

         通過上面的命令安裝結束後，我們來確認一下是否已安裝成功，通過以下命令確認一下服務是否已啓動，看到Active: active (running)狀態表示服務已成功啓動

[root@jasonsoft ~]# sudo systemctl start docker

[root@jasonsoft ~]# sudo systemctl status docker
● docker.service - Docker Application Container Engine
   Loaded: loaded (/usr/lib/systemd/system/docker.service; disabled; vendor preset: disabled)
   Active: active (running) since Tue 2020-05-12 14:00:44 CST; 3s ago
     Docs: https://docs.docker.com
 Main PID: 1988 (dockerd)
    Tasks: 16
   Memory: 47.1M
   CGroup: /system.slice/docker.service
           └─1988 /usr/bin/dockerd -H fd:// --containerd=/run/containerd/containerd.sock

May 12 14:00:44 jasonsoft dockerd[1988]: time="2020-05-12T14:00:44.029450031+08:00" level=info msg="scheme \"unix\" not registered, fallback to default scheme" module=grpc
May 12 14:00:44 jasonsoft dockerd[1988]: time="2020-05-12T14:00:44.029465388+08:00" level=info msg="ccResolverWrapper: sending update to cc: {[{unix:///run/cont...module=grpc
May 12 14:00:44 jasonsoft dockerd[1988]: time="2020-05-12T14:00:44.029476117+08:00" level=info msg="ClientConn switching balancer to \"pick_first\"" module=grpc
May 12 14:00:44 jasonsoft dockerd[1988]: time="2020-05-12T14:00:44.078407516+08:00" level=info msg="Loading containers: start."
May 12 14:00:44 jasonsoft dockerd[1988]: time="2020-05-12T14:00:44.309244318+08:00" level=info msg="Default bridge (docker0) is assigned with an IP address 172....IP address"
May 12 14:00:44 jasonsoft dockerd[1988]: time="2020-05-12T14:00:44.363760391+08:00" level=info msg="Loading containers: done."
May 12 14:00:44 jasonsoft dockerd[1988]: time="2020-05-12T14:00:44.392670287+08:00" level=info msg="Docker daemon" commit=afacb8b graphdriver(s)=overlay2 version=19.03.8
May 12 14:00:44 jasonsoft dockerd[1988]: time="2020-05-12T14:00:44.392801249+08:00" level=info msg="Daemon has completed initialization"
May 12 14:00:44 jasonsoft dockerd[1988]: time="2020-05-12T14:00:44.419480872+08:00" level=info msg="API listen on /var/run/docker.sock"
May 12 14:00:44 jasonsoft systemd[1]: Started Docker Application Container Engine.
Hint: Some lines were ellipsized, use -l to show in full.

       能過以下命令查看Docker Engine相關信息

[root@jasonsoft ~]# docker -v
Docker version 19.03.8, build afacb8b

[root@jasonsoft ~]# docker info
Client:
 Debug Mode: false

Server:
 Containers: 0
  Running: 0
  Paused: 0
  Stopped: 0
 Images: 0
 Server Version: 19.03.8
 Storage Driver: overlay2
  Backing Filesystem: <unknown>
  Supports d_type: true
  Native Overlay Diff: true
 Logging Driver: json-file
 Cgroup Driver: cgroupfs
 Plugins:
  Volume: local
  Network: bridge host ipvlan macvlan null overlay
  Log: awslogs fluentd gcplogs gelf journald json-file local logentries splunk syslog
 Swarm: inactive
 Runtimes: runc

  看到上面信息表示安裝成功啦，後面我們就可以在Docker Engine上嗨起來了

查看我本人更多原創文章，請點擊這裏。