setup docker and Rancher

https://www.cnrancher.com/docs/rancher/v2.x/cn/install-prepare/basic-environment-configuration/

wget https://mirrors.aliyun.com/docker-ce/linux/centos/docker-ce.repo -O /etc/yum.repos.d/docker-ce.repo

卸载docker 
sudo yum remove docker  docker-common docker-selinux docker-engine
1.查询安装过的包
yum list installed | grep docker
2.删除安装的软件包
yum -y remove containerd.io.x86_64
yum -y remove docker-ce-cli.x86_64
 

3.删除镜像/容器等

rm -rf /var/lib/docker
安装
yum install -y docker-ce
systemctl enable docker && systemctl start docker
docker –version

 

docker安装步骤

$ uname -r

2、使用 root 权限登录 Centos。确保 yum 包更新到最新。

$ sudo yum update

3、卸载旧版本(如果安装过旧版本的话)

$ sudo yum remove docker  docker-common docker-selinux docker-engine

4、安装需要的软件包， yum-util 提供yum-config-manager功能，另外两个是devicemapper驱动依赖的

$ sudo yum install -y yum-utils device-mapper-persistent-data lvm2

5、设置yum源

$ sudo yum-config-manager --add-repo https://download.docker.com/linux/centos/docker-ce.repo

6、可以查看所有仓库中所有docker版本，并选择特定版本安装

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

7、安装docker

$ sudo yum install docker-ce  #由于repo中默认只开启stable仓库，故这里安装的是最新稳定版17.12.0

$ sudo yum install <FQPN>  # 例如：sudo yum install docker-ce-17.12.0.ce

 

8、启动并加入开机启动

$ sudo systemctl start docker

$ sudo systemctl enable docker

9、验证安装是否成功(有client和service两部分表示docker安装启动都成功了)

$ docker version

安装 docker-compose

sudo curl -L "https://github.com/docker/compose/releases/download/1.23.2/docker-compose-$(uname -s)-$(uname -m)" -o /usr/local/bin/docker-compose

sudo chmod +x /usr/local/bin/docker-compose

docker-compose --version

以下不确定

 

hostnamectl set-hostname master
hostnamectl set-hostname node2  85.13
hostnamectl set-hostname node3  85.14（1 无法联网）

vi /etc/hosts
192.168.85.11 master
192.168.85.13 node2
192.168.85.14 node3

#关闭防火墙、selinux和swap。
systemctl stop firewalld
systemctl disable firewalld
setenforce 0
sed -i "s/^SELINUX=enforcing/SELINUX=disabled/g" /etc/selinux/config
swapoff -a
sed -i 's/.*swap.*/#&/' /etc/fstab

#配置内核参数，将桥接的IPv4流量传递到iptables的链
vi /etc/sysctl.d/k8s.conf 
net.bridge.bridge-nf-call-ip6tables = 1
net.bridge.bridge-nf-call-iptables = 1
sysctl --system
#配置国内yum源
yum install -y wget
mkdir /etc/yum.repos.d/bak && mv /etc/yum.repos.d/*.repo /etc/yum.repos.d/bak
wget -O /etc/yum.repos.d/CentOS-Base.repo http://mirrors.cloud.tencent.com/repo/centos7_base.repo
wget -O /etc/yum.repos.d/epel.repo http://mirrors.cloud.tencent.com/repo/epel-7.repo
yum clean all && yum makecache

[kubernetes] 国内Kubernetes源
cd /etc/yum.repos.d/

cat <<EOF > kubernetes.repo
[kubernetes]
name=Kubernetes
baseurl=https://mirrors.aliyun.com/kubernetes/yum/repos/kubernetes-el7-x86_64
enabled=1
gpgcheck=1
repo_gpgcheck=1
gpgkey=https://mirrors.aliyun.com/kubernetes/yum/doc/yum-key.gpg https://mirrors.aliyun.com/kubernetes/yum/doc/rpm-package-key.gpg
EOF

 

以下失败----&&&&仅供参考

# 添加用户(可选)
sudo adduser `docker_user`
# 为新用户设置密码
sudo passwd `docker_user`
# 为新用户添加sudo权限
sudo echo 'docker_user ALL=(ALL) ALL' >> /etc/sudoers
# 卸载旧版本Docker软件
sudo yum remove docker \
              docker-client \
              docker-client-latest \
              docker-common \
              docker-latest \
              docker-latest-logrotate \
              docker-logrotate \
              docker-selinux \
              docker-engine-selinux \
              docker-engine \
              container*
# 定义安装版本
export docker_version=18.06.3
# step 1: 安装必要的一些系统工具
sudo yum remove docker docker-client docker-client-latest \
    docker-common docker-latest docker-latest-logrotate \
    docker-logrotate docker-engine -y;
sudo yum update -y;
sudo yum install -y yum-utils device-mapper-persistent-data \
    lvm2 bash-completion;
# Step 2: 添加软件源信息
sudo yum-config-manager --add-repo \
    http://mirrors.aliyun.com/docker-ce/linux/centos/docker-ce.repo;
# Step 3: 更新并安装 Docker-CE
sudo yum makecache all;
version=$(yum list docker-ce.x86_64 --showduplicates | sort -r|grep ${docker_version}|awk '{print $2}');
sudo yum -y install --setopt=obsoletes=0 docker-ce-${version} docker-ce-selinux-${version};
# 如果已经安装高版本Docker,可进行降级安装(可选)
yum downgrade --setopt=obsoletes=0 -y docker-ce-${version} docker-ce-selinux-${version};
# 把当前用户加入docker组
sudo usermod -aG docker `docker_user`;
# 设置开机启动
sudo systemctl enable docker;