国内源安装新版docker

使用aliyun docker yum源安装新版docker
删除已安装的Docker

    # yum remove docker \
                  docker-client \
                  docker-client-latest \
                  docker-common \
                  docker-latest \
                  docker-latest-logrotate \
                  docker-logrotate \
                  docker-selinux \
                  docker-engine-selinux \
                  docker-engine

配置阿里云Docker Yum源
    # yum install -y yum-utils device-mapper-persistent-data lvm2 git
    # yum-config-manager --add-repo http://mirrors.aliyun.com/docker-ce/linux/centos/docker-ce.repo

安装指定版本
    查看Docker版本：
    # yum list docker-ce --showduplicates

    安装较旧版本（比如Docker 17.03.2) ：
        需要指定完整的rpm包的包名，并且加上--setopt=obsoletes=0 参数：
        # yum install -y --setopt=obsoletes=0 \
        docker-ce-17.03.2.ce-1.el7.centos.x86_64 \
        docker-ce-selinux-17.03.2.ce-1.el7.centos.noarch

    安装Docker新版本（比如Docker 18.03.0)：
        加上rpm包名的版本号部分或不加都可以：
        # yum install docker-ce-18.03.0.ce  -y
        或者
        # yum install docker-ce -y

启动Docker服务：
    #systemctl enable docker
    #systemctl start docker

查看docker版本状态： 
    # docker -v
    Docker version 1.13.1, build 8633870/1.13.1  

    # docker version
    Client:
     Version:           18.09.0
     API version:       1.39
     Go version:        go1.10.4
     Git commit:        4d60db4
     Built:             Wed Nov  7 00:48:22 2018
     OS/Arch:           linux/amd64
     Experimental:      false

    Server: Docker Engine - Community
     Engine:
      Version:          18.09.0
      API version:      1.39 (minimum version 1.12)
      Go version:       go1.10.4
      Git commit:       4d60db4
      Built:            Wed Nov  7 00:19:08 2018
      OS/Arch:          linux/amd64
      Experimental:     false

查看docker运行状态：
    # docker info
    Containers: 0
     Running: 0
     Paused: 0
     Stopped: 0
    Images: 0
    Server Version: 18.09.0
    Storage Driver: overlay2
     Backing Filesystem: xfs
     Supports d_type: true
     Native Overlay Diff: true
    Logging Driver: json-file
    Cgroup Driver: cgroupfs
    Plugins:
     Volume: local
     Network: bridge host macvlan null overlay
     Log: awslogs fluentd gcplogs gelf journald json-file local logentries splunk syslog
    Swarm: inactive
    Runtimes: runc
    Default Runtime: runc
    Init Binary: docker-init
    containerd version: c4446665cb9c30056f4998ed953e6d4ff22c7c39
    runc version: 4fc53a81fb7c994640722ac585fa9ca548971871
    init version: fec3683
    Security Options:
     seccomp
      Profile: default
    Kernel Version: 3.10.0-957.el7.x86_64
    Operating System: CentOS Linux 7 (Core)
    OSType: linux
    Architecture: x86_64
    CPUs: 4
    Total Memory: 1.934GiB
    Name: docker
    ID: MF5S:ZX25:SWJ3:XEIG:FFHP:5VXF:F5AL:KQFF:KKXP:XZGY:YGTE:EBQF
    Docker Root Dir: /var/lib/docker
    Debug Mode (client): false
    Debug Mode (server): false
    Registry: https://index.docker.io/v1/
    Labels:
    Experimental: false
    Insecure Registries:
     127.0.0.0/8
    Live Restore Enabled: false
    Product License: Community Engine

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

报错解决

报错1：
    docker info的时候报如下错误
    bridge-nf-call-iptables is disabled

解决1：
    追加如下配置,然后重启系统
    # vim /etc/sysctl.conf   
    net.bridge.bridge-nf-call-ip6tables = 1
    net.bridge.bridge-nf-call-iptables = 1
    net.bridge.bridge-nf-call-arptables = 1

问题2：
    虚拟机ping百度也能ping通，但是需要等好几秒才出结果，关键是下载镜像一直报错如下
    # docker pull daocloud.io/library/nginx
    Using default tag: latest
    Error response from daemon: Get https://daocloud.io/v2/: dial tcp: lookup daocloud.io on 192.168.1.2:53: read udp   192.168.1.189:41335->192.168.1.2:53: i/o timeout

解决2：
    我的虚拟机用的网关和dns都是虚拟机自己的.1或者.2，把DNS改成8.8.8.8问题就解决了，ping百度也秒出结果
    # vim /etc/resolv.conf
    nameserver 8.8.8.8