2、docker+k8s+kubesphere:docker安装

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2、docker安装-docker+k8s+kubesphere

卸载以前的docker

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

查看可用的docker版本

yum list docker-ce --showduplicates | sort -r
或者
yum list docker-ce --showduplicates

----------------------------------------------------
结果如下
----------------------------------------------------
[root@node151 ~]# yum list docker-ce --showduplicates | sort -r
已加载插件：fastestmirror
可安装的软件包
 * updates: mirrors.aliyun.com
Loading mirror speeds from cached hostfile
 * extras: mirrors.aliyun.com
docker-ce.x86_64            3:19.03.9-3.el7                     docker-ce-stable
docker-ce.x86_64            3:19.03.8-3.el7                     docker-ce-stable
docker-ce.x86_64            3:19.03.7-3.el7                     docker-ce-stable
docker-ce.x86_64            3:19.03.6-3.el7                     docker-ce-stable
docker-ce.x86_64            3:19.03.5-3.el7                     docker-ce-stable
docker-ce.x86_64            3:19.03.4-3.el7                     docker-ce-stable
docker-ce.x86_64            3:19.03.3-3.el7                     docker-ce-stable
docker-ce.x86_64            3:19.03.2-3.el7                     docker-ce-stable
docker-ce.x86_64            3:19.03.1-3.el7                     docker-ce-stable
docker-ce.x86_64            3:19.03.12-3.el7                    docker-ce-stable
docker-ce.x86_64            3:19.03.11-3.el7                    docker-ce-stable
docker-ce.x86_64            3:19.03.10-3.el7                    docker-ce-stable
docker-ce.x86_64            3:19.03.0-3.el7                     docker-ce-stable
docker-ce.x86_64            3:18.09.9-3.el7                     docker-ce-stable
docker-ce.x86_64            3:18.09.8-3.el7                     docker-ce-stable
docker-ce.x86_64            3:18.09.7-3.el7                     docker-ce-stable
docker-ce.x86_64            3:18.09.6-3.el7                     docker-ce-stable
docker-ce.x86_64            3:18.09.5-3.el7                     docker-ce-stable
docker-ce.x86_64            3:18.09.4-3.el7                     docker-ce-stable
docker-ce.x86_64            3:18.09.3-3.el7                     docker-ce-stable
docker-ce.x86_64            3:18.09.2-3.el7                     docker-ce-stable
docker-ce.x86_64            3:18.09.1-3.el7                     docker-ce-stable
docker-ce.x86_64            3:18.09.0-3.el7                     docker-ce-stable
docker-ce.x86_64            18.06.3.ce-3.el7                    docker-ce-stable
docker-ce.x86_64            18.06.2.ce-3.el7                    docker-ce-stable
docker-ce.x86_64            18.06.1.ce-3.el7                    docker-ce-stable
docker-ce.x86_64            18.06.0.ce-3.el7                    docker-ce-stable
docker-ce.x86_64            18.03.1.ce-1.el7.centos             docker-ce-stable
docker-ce.x86_64            18.03.0.ce-1.el7.centos             docker-ce-stable
docker-ce.x86_64            17.12.1.ce-1.el7.centos             docker-ce-stable
docker-ce.x86_64            17.12.0.ce-1.el7.centos             docker-ce-stable
docker-ce.x86_64            17.09.1.ce-1.el7.centos             docker-ce-stable
docker-ce.x86_64            17.09.0.ce-1.el7.centos             docker-ce-stable
docker-ce.x86_64            17.06.2.ce-1.el7.centos             docker-ce-stable
docker-ce.x86_64            17.06.1.ce-1.el7.centos             docker-ce-stable
docker-ce.x86_64            17.06.0.ce-1.el7.centos             docker-ce-stable
docker-ce.x86_64            17.03.3.ce-1.el7                    docker-ce-stable
docker-ce.x86_64            17.03.2.ce-1.el7.centos             docker-ce-stable
docker-ce.x86_64            17.03.1.ce-1.el7.centos             docker-ce-stable
docker-ce.x86_64            17.03.0.ce-1.el7.centos             docker-ce-stable
 * base: mirrors.aliyun.com

这里版本不要用最新的版本，肯能后面与到降级的问题，安装18最后一个版本18.09.9

安装docker18.09.9-3.el7

指定版本安装

yum -y install docker-ce-18.09.9-3.el7 docker-ce-cli-18.09.9

参考：最新版本安装
yum install -y docker-ce

启动docker并设置开机自启

systemctl enable docker && systemctl start docker

相关命令
systemctl enable docker 开机启动
systemctl enable docker.service
service docker start 启动
service docker restart 重启
service docker stop 停止
docker重新读取配置文件，重新启动docker服务
systemctl daemon-reload
systemctl restart docker
查看状态
systemctl status docker.service

配置阿里云docker镜像加速

cat > /etc/docker/daemon.json <<-'EOF'
{
  "registry-mirrors": ["https://3h9ba4le.mirror.aliyuncs.com"]
}
EOF

#重启docker
systemctl daemon-reload
systemctl restart docker

检查加速器是否生效

[root@node151 ~]# docker info
Client:
 Debug Mode: false

Server:
 Containers: 0
  Running: 0
  Paused: 0
  Stopped: 0
 Images: 0
 Server Version: 18.09.9
 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: 7ad184331fa3e55e52b890ea95e65ba581ae3429
 runc version: dc9208a3303feef5b3839f4323d9beb36df0a9dd
 init version: fec3683
 Security Options:
  seccomp
   Profile: default
 Kernel Version: 3.10.0-1127.13.1.el7.x86_64
 Operating System: CentOS Linux 7 (Core)
 OSType: linux
 Architecture: x86_64
 CPUs: 8
 Total Memory: 11.28GiB
 Name: node151
 ID: 2I7M:Q5U2:GAZM:KGI2:L74R:7JLB:X7JZ:SK6B:3MXD:44VQ:6OVK:RFM3
 Docker Root Dir: /var/lib/docker
 Debug Mode: false
 Registry: https://index.docker.io/v1/
 Labels:
 Experimental: false
 Insecure Registries:
  127.0.0.0/8
 Registry Mirrors:
  https://3h9ba4le.mirror.aliyuncs.com/    加速器在这里
 Live Restore Enabled: false
 Product License: Community Engine

docker 版本查看

[root@node51 ~]# docker version
Client:
 Version:           18.09.9
 API version:       1.39
 Go version:        go1.11.13
 Git commit:        039a7df9ba
 Built:             Wed Sep  4 16:51:21 2019
 OS/Arch:           linux/amd64
 Experimental:      false

Server: Docker Engine - Community
 Engine:
  Version:          18.09.9
  API version:      1.39 (minimum version 1.12)
  Go version:       go1.11.13
  Git commit:       039a7df
  Built:            Wed Sep  4 16:22:32 2019
  OS/Arch:          linux/amd64
  Experimental:     false

阿里的加速申请，参考https://cr.console.aliyun.com/
docker安装完成后才会有daemon.json文件
cat /etc/docker/daemon.json
参考其他的加速器
{
“registry-mirrors” : [
“https://3h9ba4le.mirror.aliyuncs.com”,
“https://docker.mirrors.ustc.edu.cn”,
“https://hub-mirror.c.163.com”,
“https://reg-mirror.qiniu.com”
],
“storage-driver” : “devicemapper”
}

修改docker Cgroup Driver为systemd

vim /usr/lib/systemd/system/docker.service
#屏蔽这一行
#ExecStart=/usr/bin/dockerd -H fd:// --containerd=/run/containerd/containerd.sock
#增加这一行
ExecStart=/usr/bin/dockerd -H fd:// --containerd=/run/containerd/containerd.sock --exec-opt native.cgroupdriver=systemd
这里为什么改，自行百度

重启docker
systemctl daemon-reload && systemctl restart docker
查看状态

检查docker及相关命令

docker ps
docker version
docker images
service docker start     启动
service docker restart   重启
service docker stop      停止 
systemctl status docker.service 状态