docker安装

安装命令

curl -sSL https://get.daocloud.io/docker | sh

docker开机启动

systemctl enable docker

系统配置修改(改了好像打不开rancher)

vi /etc/sysctl.conf
#加入配置
net.bridge.bridge-nf-call-iptables  = 1
net.bridge.bridge-nf-call-ip6tables = 1
vm.swappiness=0
#执行命令生效
sysctl -p /etc/sysctl.conf

执行命令报错： sysctl: cannot stat /proc/sys/net/bridge/bridge-nf-call-iptables: 没有那个文件或目录
解决命令： modprobe br_netfilter

关闭防火墙

sudo systemctl stop firewalld.service   #停止firewall
sudo systemctl disable firewalld.service #禁止firewall开机启动
sudo firewall-cmd --state             #查看防火墙状态

关掉swap

vi /etc/fstab
#注释掉swap这行
#/dev/mapper/centos-swap swap                    swap    defaults        0 0
#free -m命令查看 swap为0
Swap:          8063           0        8063

resolv.conf权限问题

chattr -i /etc/resolv.conf
chown 755 /etc/resolv.conf

host修改

hostnamectl set-hostname node1
#改完重启网络
service network restart