Docker 安装和使用

1、在Ubuntu上安装docker，这里使用的版本是：Ubuntu18.04

安装apt-transport-https等软件包支持HTTPS协议源：

cobbler@cobbler-docker:~$ sudo apt-get install \apt-transport-https \ca-certificates \curl \software-properties-common

添加源的gpg密钥：

cobbler@cobbler-docker:~$ curl -fsSL https://download.docker.com/linux/ubuntu/gpg | sudo apt-key add -OK

确认导入密钥：

cobbler@cobbler-docker:~$ sudo apt-key fingerprints 0EBFCD88    pub   rsa4096 2017-02-22 [SCEA]           9DC8 5822 9FC7 DD38 854A  E2D8 8D81 803C 0EBF CD88    uid           [ unknown] Docker Release (CE deb) 
    
         sub   rsa4096 2017-02-22 [S]
    

获取当前操作系统的代号：

一般情况下，Ubuntu 16.04 LTS代号为xenial, Ubuntu 18.04 LTS代号为bionic

cobbler@cobbler-docker:~$ lsb_release -cs    bionic

添加官方稳定版软件源：

cobbler@cobbler-docker:~$ sudo add-apt-repository \         "deb [arch=amd64] https://download.docker.com/linux/ubuntu \         bionic \         stable"

添加后需要更新apt软件包缓存：

cobbler@cobbler-docker:~$ sudo apt-get update

开始安装docker，安装成功之后、会自动启动docker服务

cobbler@cobbler-docker:~$ sudo apt-get install -y docker-ce

2、在centos安装docker、这里使用的版本为centos 7.5，需要提前配置好epel源、获取docker的repo文件和安装docker

[root@node7 ~]# wget https://mirrors.aliyun.com/docker-ce/linux/centos/docker-ce.repo -O /etc/yum.repos.d/[root@node7 ~]# yum -y install docker-ce

使用阿里云加速器、阿里云的镜像地址为 需要注册，使用自己的加速地址即可

[root@kvm-server ~]# mkdir -p /etc/docker    [root@kvm-server docker]# vim daemon.json    {  "registry-mirrors": ["https://xxxxxx.mirror.aliyuncs.com"]    }

在启动之前需要改下docker的启动服务加一项iptables规则要不然启动之后forwar链上默认被改成DROP

[root@kvm-server docker]# vim /usr/lib/systemd/system/docker.service ExecStartPost=/usr/sbin/iptables -P FORWARD ACCEPT

重载文件、并启动docker服务

[root@kvm-server docker]# systemctl daemon-reload    [root@kvm-server docker]# systemctl restart docker

查看docker的信息

[root@node7 ~]#docker info Containers: 6 Running: 6 Paused: 0 Stopped: 0Images: 5Server Version: 18.06.1-ceStorage Driver: overlay2 Backing Filesystem: xfs Supports d_type: true Native Overlay Diff: trueLogging Driver: json-fileCgroup Driver: cgroupfsPlugins: Volume: local Network: bridge host macvlan null overlay Log: awslogs fluentd gcplogs gelf journald json-file logentries splunk syslogSwarm: inactiveRuntimes: runcDefault Runtime: runcInit Binary: docker-initcontainerd version: 468a545b9edcd5932818eb9de8e72413e616e86erunc version: 69663f0bd4b60df09991c08812a60108003fa340init version: fec3683Security Options: seccomp  Profile: defaultKernel Version: 3.10.0-862.el7.x86_64Operating System: CentOS Linux 7 (Core)OSType: linuxArchitecture: x86_64CPUs: 2Total Memory: 1.779GiBName: node7.dklwj.comID: OST6:BVR7:UBAN:ACCI:YKPX:RLEM:DXKQ:QQPI:LYSY:PIVO:EUUA:4PQRDocker Root Dir: /var/lib/dockerDebug Mode (client): falseDebug Mode (server): falseRegistry: https://index.docker.io/v1/Labels:Experimental: falseInsecure Registries: 127.0.0.0/8Registry Mirrors: https://xxxxxxxxx.mirror.aliyuncs.com/Live Restore Enabled: false