centos不关闭swap搭建k8s

业务要求必须在不关闭swap的情况下搭建k8s：

curl -o /etc/yum.repos.d/CentOS-Base.repo \ https://mirrors.aliyun.com/repo/Centos-7.repo

yum install ntpdate bash-completion vim wget
wget https://mirrors.aliyun.com/docker-ce/linux/centos/docker-ce.repo -O /etc/yum.repos.d/docker-ce.repo
# docker-ce 源

[k8s]
name=kubernetes
baseurl=https://mirrors.aliyun.com/kubernetes/yum/repos/kubernetes-el7-x86_64/
enabled=1
gpgcheck=0

							#k8s源

yum clean all
yum repolist

yum install kubeadm-1.18.3 kubectl-1.18.3 kubelet-1.18.3
yum install docker-ce ntpdate bash-completion vim wget
systemctl restart docker && systemctl enable docker kubelet

setenforce 0
systemctl stop firewalld
#防火墙千万千万不要忘记关

ntpdate ntp1.aliyun.com
#时间同步

echo “net.ipv4.ip_forward = 1” >> /etc/sysctl.conf
echo “net.bridge.bridge-nf-call-ip6tables = 1” >> /etc/sysctl.conf
echo “net.bridge.bridge-nf-call-iptables = 1” >> /etc/sysctl.conf

dd if=/dev/zero of=swapfile bs=1024 count=130000000
mkswap swapfile
swapon swapfile # 130G的swap空间

vim /etc/sysconfig/kubelet
KUBELET_EXTRA_ARGS="–fail-swap-on=false"
–ignore-preflight-errors=Swap
# 最关键的地方

kubeadm config images list #查看需要下载什么镜像

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#!/bin/bash
##使用如下脚本下载国内镜像，并修改tag为google的tag
set -e

KUBE_VERSION=v1.16.0
KUBE_PAUSE_VERSION=3.1
ETCD_VERSION=3.3.15-0
CORE_DNS_VERSION=1.6.2

GCR_URL=k8s.gcr.io
ALIYUN_URL=registry.cn-hangzhou.aliyuncs.com/google_containers

images=(kube-proxy:$KUB{E}_{V}ERSIONkube-scheduler:${KUBE_VERSION}
kube-controller-manager:$KUB{E}_{V}ERSIONkube-apiserver:${KUBE_VERSION}
pause:$KUB{E}_{P}AUS{E}_{V}ERSIONetcd:${ETCD_VERSION}
coredns:${CORE_DNS_VERSION})

for imageName in ${images[@]} ; do
docker pull $ALIYU{N}_{U}RL/$imageName
docker tag $ALIYU{N}_{U}RL/$imageName $GC{R}_{U}RL/$imageName
docker rmi $ALIYU{N}_{U}RL/$imageName
done

kubeadm init --kubernetes-version=v1.18.3 --pod-network-cidr=10.244.0.0/16 --service-cidr=10.96.0.0/12

完成！！！