用Rancher2.x版本部署k8s

一、用Rancher2.x版本部署k8s

1、Rancher简介

Rancher官网
Rancher是业界唯一完全开源的企业级容器管理平台，为企业用户提供在生产环境中落地使用容器所需的一切功能与组件。

Rancher2.x基于Kubernetes构建，使用Rancher，DevOps团队可以轻松测试、部署和管理应用程序，运维团队可以部署、管理和维护一切Kubernetes集群，无论集群运行在何基础设施之上。
2、环境准备

#系统版本

操作系统：
ubuntu-18.04-server-amd64.iso
#系统版本

nulige@node3:~$ uname -a
Linux node3.com 4.15.0-20-generic #21-Ubuntu SMP Tue Apr 24 06:16:15 UTC 2018 x86_64 x86_64 x86_64 GNU/Linux

#IP规划

192.168.56.11   node1.com
192.168.56.12   node2.com
192.168.56.13   node3.com

#修改主机名（备注：三台机都要操作）

nulige@node1:~$ sudo hostname
node1.com

nulige@node1:~$ sudo vi /etc/hostname
node1.com

#配置网络

nulige@ubuntu:/etc/netplan$ sudo apt install ifupdown

nulige@ubuntu:/etc/netplan$ cd /etc/netplan

nulige@ubuntu:/etc/netplan$ sudo nano /etc/netplan/01-netcfg.yaml
# This file describes the network interfaces available on your system
# For more information, see netplan(5).
network:
version: 2
renderer: networkd
ethernets:
ens33:
addresses: [192.168.56.11/24]
gateway4: 192.168.56.2
nameservers:
addresses: [192.168.56.2, 8.8.8.8] 
dhcp4: no
optional: no

nulige@ubuntu:/etc/netplan$ sudo netplan apply

nulige@ubuntu:/etc/netplan$ ip a
2: ens33: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc fq_codel state UP group default qlen 1000
link/ether 00:50:56:2b:1a:b2 brd ff:ff:ff:ff:ff:ff
inet 192.168.56.11/24 brd 192.168.56.255 scope global ens33
valid_lft forever preferred_lft forever
inet6 fe80::250:56ff:fe2b:1ab2/64 scope link 
valid_lft forever preferred_lft forever

#配置域名解析（备注：三台机都要操作）

nulige@node1:~$ sudo vi /etc/hosts
192.168.56.11   node1.com
192.168.56.12   node2.com
192.168.56.13   node3.com

#关闭防火墙（备注：三台机都要操作）

#关闭ubuntu的防火墙
sudo ufw disable

3、安装Rancher

#安装Docker

sudo curl -sSL https://get.docker.com/ | sh

#docker命令
docker version
docker images
docker ps -a

#给当前用户赋权
sudo usermod -a -G docker $USER

#使他生效，刷新缓存
注销再登陆

#sudo免密

sudo vi /etc/sudoers

# Allow members of group sudo to execute any command
%sudo ALL=(ALL:ALL) ALL
nulige ALL=(ALL) NOPASSWD:ALL #添加此句,nulige替换为你的用户名

sudo nano /etc/apt/sources.list
# 默认注释了源码镜像以提高 apt update 速度，如有需要可自行取消注释

deb https://mirrors.tuna.tsinghua.edu.cn/ubuntu/ bionic main restricted universe multiverse
# deb-src https://mirrors.tuna.tsinghua.edu.cn/ubuntu/ bionic main restricted universe multiverse
deb https://mirrors.tuna.tsinghua.edu.cn/ubuntu/ bionic-updates main restricted universe multiverse
# deb-src https://mirrors.tuna.tsinghua.edu.cn/ubuntu/ bionic-updates main restricted universe multiverse
deb https://mirrors.tuna.tsinghua.edu.cn/ubuntu/ bionic-backports main restricted universe multiverse
# deb-src https://mirrors.tuna.tsinghua.edu.cn/ubuntu/ bionic-backports main restricted universe multiverse
deb https://mirrors.tuna.tsinghua.edu.cn/ubuntu/ bionic-security main restricted universe multiverse
# deb-src https://mirrors.tuna.tsinghua.edu.cn/ubuntu/ bionic-security main restricted universe multiverse

#更新源
sudo apt-get update

#登录管理控制台
https://dev.aliyun.com/

#配置镜像加速

sudo mkdir -p /etc/docker

sudo tee /etc/docker/daemon.json <<-'EOF'
{
"registry-mirrors": ["https://alzgoonw.mirror.aliyuncs.com"]
}
EOF

#重启服务

sudo systemctl daemon-reload
sudo systemctl restart docker

#安装Rancher

sudo docker run -d --restart=always --name rancher -p 80:80 -p 443:443 -v /opt/rancher:/var/lib/rancher rancher/rancher:latest

#登录网站

https://192.168.56.11

设置密码，再登录

#配置页面选项

#master节点配置

#添加第一个从节点

sudo docker run -d --privileged --restart=unless-stopped --net=host -v /etc/kubernetes:/etc/kubernetes -v /var/run:/var/run rancher/rancher-agent:v2.2.2 --server 
https://192.168.56.11 --token n7c95shl9dwknzglv759vjtnwgsgg2qqhpdsbwgltlrstq5nbsw9nm --ca-checksum 5aac2921fad23ca3e96fa10db845daad9851913a12830b34bcadaf5476ae47cf 
--etcd --controlplane --worker

#添加第二个从节点（配置有区别）

sudo docker run -d --privileged --restart=unless-stopped --net=host -v /etc/kubernetes:/etc/kubernetes -v /var/run:/var/run rancher/rancher-agent:v2.2.2 --server 
https://192.168.56.11 --token n7c95shl9dwknzglv759vjtnwgsgg2qqhpdsbwgltlrstq5nbsw9nm --ca-checksum 5aac2921fad23ca3e96fa10db845daad9851913a12830b34bcadaf5476ae47cf
 --worker

#添加节点成功

clusters