vmware15，centos8部署rke高可用集羣

1.虛擬機準備

三臺centos8虛擬機
採用nat方式鏈接外網
因此虛擬機固定ip地址

1.1 nat方式鏈接外網

此處不介紹

1.2 虛擬機使用固定ip地址

注意點1：

vmware內部網絡的設置，選擇nat的vmware8網卡後，不勾選dhcp服務

注意點2：

虛擬機內部設置文件/etc/sysconfig/network-script/ifcfg-ens##
修改如下值：

BOOTPROTO=static
ONBOOT=yes
IPADDR=192.168.*.*
NETMASK=255.255.*.*
GATEWAY=192.168.*.*
DNS1=114.114.114.114

控制檯執行

nmcli c reload

1.3 建立普通用戶

useradd ###(用戶名)
usermod -aG docker ###(用戶名)
passwd ###

vi /etc/sudoers
找到這一行："root ALL=(ALL) ALL"，
在下面添加"xxx ALL=(ALL) ALL"(這裏的xxx是你的用戶名)

2.虛擬機環境準備

2.1 配置hosts文件

修改/etc/hosts文件，加入如下

IP name

2.2docker安裝

yum config-manager --add-repo https://download.docker.com/linux/centos/docker-ce.repo
yum install -y --setopt=obsoletes=0   docker-ce-18.06.1.ce-3.el7
systemctl start docker
systemctl enable docker

2.3更換docker倉庫

# 此處修改成中科大倉庫
vi /etc/docker/daemon.json

"registry-mirrors": ["https://docker.mirrors.ustc.edu.cn"]

2.4 關閉selinux和swap

sed -i '/^SELINUX/s/enforcing/disabled/' /etc/selinux/config
sed -i 's/.*swap.*/#&/' /etc/fstab

2.5關閉防火牆

systemctl stop firewalld.service
systemctl disable firewalld.service

2.6同步時區

timedatectl set-timezone Asia/Shanghai

3集羣安裝

3.1 下載rke

wget https://github.com/rancher/rke/releases/download/v1.1.4/rke_linux-amd64
chmod +x rke_linux_amd64

3.2 開始配置cluster.yaml

執行 ./rke_linux_amd64 config

[+] Cluster Level SSH Private Key Path [~/.ssh/id_rsa]: 
[+] Number of Hosts [1]:  主機數量
[+] SSH Address of host (1) [none]: ip地址
[+] SSH Port of host (1) [22]: 端口
[+] SSH Private Key Path of host (ip地址) [none]: 
[-] You have entered empty SSH key path, trying fetch from SSH key parameter
[+] SSH Private Key of host (ip地址) [none]: 
[-] You have entered empty SSH key, defaulting to cluster level SSH key: ~/.ssh/id_rsa
[+] SSH User of host (ip地址) [ubuntu]: 用戶名
[+] Is host (ip地址) a Control Plane host (y/n)? [y]: 控制平面
[+] Is host (ip地址) a Worker host (y/n)? [n]: 工做節點
[+] Is host (ip地址) an etcd host (y/n)? [n]: etcd服務
[+] Override Hostname of host (ip地址) [none]: 重命名節點
[+] Internal IP of host (ip地址) [none]: 
[+] Docker socket path on host (ip地址) [/var/run/docker.sock]: 
[+] Network Plugin Type (flannel, calico, weave, canal) [canal]: calico(網絡插件選擇)
[+] Authentication Strategy [x509]: 
[+] Authorization Mode (rbac, none) [rbac]: 
[+] Kubernetes Docker image [rancher/hyperkube:v1.18.6-rancher1]: 
[+] Cluster domain [cluster.local]: 
[+] Service Cluster IP Range [10.43.0.0/16]: 
[+] Enable PodSecurityPolicy [n]: 
[+] Cluster Network CIDR [10.42.0.0/16]: 
[+] Cluster DNS Service IP [10.43.0.10]: 
[+] Add addon manifest URLs or YAML files [no]:

3.3 初始化集羣至完成

./rke_linux_amd64 up
mv kube_config_cluster.yml .kube/config

3.4 安裝kubectl工具

cat > /etc/yum.repos.d/kubernetes.repo << END
[kubernetes]
name = kubernetes
baseurl = https://mirrors.aliyun.com/kubernetes/yum/repos/kubernetes-el7-x86_64
gpgchek = 1
gpgkey = https://mirrors.aliyun.com/kubernetes/yum/doc/rpm-package-key.gpg
          https://mirrors.aliyun.com/kubernetes/yum/doc/yum-key.gpg
enable = 1
END

yum install kubectl-1.18.6

3.5 安裝完成