kubeadm+kube-vip搭建高可用k8s集群

通用

安装基本软件包

yum install bash‐comp* vim net‐tools wget ‐y

设置主机名，管理节点设置主机名为node1（node2的设置为node2）

hostnamectl set-hostname node102

设置Host解析，编辑/etc/hosts文件，添加域名解析

[root@node1 ~]# vim /etc/hosts
10.168.1.101 node101
10.168.1.102 node102
10.168.1.103 node103

关闭防火墙、selinux和swap

[root@node1 ~]# systemctl stop firewalld
[root@node1 ~]# systemctl disable firewalld
[root@node1 ~]# setenforce 0
[root@node1 ~]# sed -i 's/SELINUX=enforcing/SELINUX=disabled/g' /etc/selinux/config
[root@node1 ~]# swapoff -a
[root@node1 ~]# 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

[root@node1 ~]# cat >> /etc/sysctl.d/k8s.conf <<EOF
> net.bridge.bridge-nf-call-ip6tables = 1
> net.bridge.bridge-nf-call-iptables = 1
> EOF
[root@node1 ~]# sysctl --system
* Applying /usr/lib/sysctl.d/00-system.conf ...
* Applying /usr/lib/sysctl.d/10-default-yama-scope.conf ...
kernel.yama.ptrace_scope = 0
* Applying /usr/lib/sysctl.d/50-default.conf ...
kernel.sysrq = 16
kernel.core_uses_pid = 1
net.ipv4.conf.default.rp_filter = 1
net.ipv4.conf.all.rp_filter = 1
net.ipv4.conf.default.accept_source_route = 0
net.ipv4.conf.all.accept_source_route = 0
net.ipv4.conf.default.promote_secondaries = 1
net.ipv4.conf.all.promote_secondaries = 1
fs.protected_hardlinks = 1
fs.protected_symlinks = 1
* Applying /etc/sysctl.d/99-sysctl.conf ...
* Applying /etc/sysctl.d/k8s.conf ...
* Applying /etc/sysctl.conf ...

配置阿里云的kubernetes的yum源

[root@master ~]# cat >>/etc/yum.repos.d/kubernetes.repo <<EOF
[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
[root@node1 ~]# wget https://mirrors.aliyun.com/docker-ce/linux/centos/docker-ce.repo -O /etc/yum.repos.d/docker-ce.repo
[root@node1 ~]# yum repolist

docker-ce安装

卸载掉当前默认docker环境

[root@node1 ~]# yum -y remove docker docker-common docker-selinux docker-engine

安装Docker-ce

[root@node1 ~]# yum install docker-ce -y
[root@node1 ~]# systemctl start docker
[root@node1 ~]# systemctl enable docker

kubelet、kubeadm、kubectl安装

[root@node1 ~]# yum install kubelet kubeadm kubectl -y