kubeadm构建k8s集群脚本

环境：

内存:大于2G

内核核心数：大于4

磁盘空间：大于20G

 

centos7.7	4.4.206-1.el7.elrepo.x86_64
kubeadm	v1.16.3
kubelet	v1.16.3
kubectl	v1.16.3
docker	docker-ce-18.09.6

系统安装完成之后的kernel是3.10版本，升级centos内核参照：

https://blog.csdn.net/kikajack/article/details/79396793

简易脚本：

代码当中两个变量需要注意：

DOCKER_REGISTRY:下载镜像时自己镜像仓库名称，

PASSWORD：登录仓库的密码

如何使用阿里云镜像与github构建镜像参照：

https://blog.csdn.net/sinat_35543900/article/details/103290782

网盘有我已经打包好的镜像压缩包：

https://pan.baidu.com/s/1JSBSejoPfjxZE6tifnAYiQ 提取码：t8xd

 

#!/bin/bash
TAG_INFO=v1.16.3
sed -i "s/Slinux=enforing/Slinux=disabled/g" /etc/selinux/config
setenforce 0 
#set hostname
hostnamectl set-hostname master 
cat >/etc/hosts <<EFO
127.0.0.1   localhost localhost localhost4 localhost4.localdomain4
::1         localhost localhost localhost6 localhost6.localdomain6
192.168.10.151 master
192.168.10.152 node01
192.168.10.151 node02
EFO

firewall-cmd --zone=public --add-port=80/tcp --permanent
firewall-cmd --zone=public --add-port=6443/tcp --permanent
firewall-cmd --zone=public --add-port=2379-2380/tcp --permanent
firewall-cmd --zone=public --add-port=10250-10255/tcp --permanent
firewall-cmd --zone=public --add-port=30000-32767/tcp --permanent
firewall-cmd --reload
firewall-cmd --zone=public --list-ports

yum install -y conntrack ntpdate ntp ipvsadm ipset curl sysstat libseccomp wget vim net-tools  git 

systemctl stop firewalld && systemctl disable firewalld 
yum install iptables-services -y && systemctl start iptables && systemctl enable iptables && iptables -F && service iptables save
swapoff -a && sed -i "s/selinux=enforing/selinux=disable/g" /etc/selinux/config

touch /etc/sysctl.d/k8s.conf
cat </etc/sysctl.d/k8s.conf<<EFO
net.bridge.bridge-nf-call-ip6tables = 1
net.bridge.bridge-nf-call-iptables = 1
net.ipv4.ip_forward = 1
vm.swappiness=0
vm.panic_on_oom=0
net.ipv6.conf.all.disable_ipv6=1
EFO

sysctl -p /etc/sysctl.d/k8s.conf


modprobe br_netfilter
modprobe -- ip_vs
modprobe -- ip_vs_rr
modprobe -- ip_vs_wrr
modprobe -- ip_vs_sh
modprobe -- nf_conntrack_ipv4

#insatll docker and kebernetes repos
yum install -y yum-utils device-mapper-persistent-data lvm2
yum-config-manager --add-repo https://mirrors.aliyun.com/docker-ce/linux/centos/docker-ce.repo
cat <<EOF > /etc/yum.repos.d/kubernetes.repo
[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
yum makecache fast

#install k8s_cluster appliacations 
yum install docker-ce-18.09.6 -y
yum install kubeadm-1.16.3 kubectl-1.16.3 kubelet-1.16.3 -y


echo "1">/proc/sys/net/bridge/bridge-nf-call-iptables
echo "1">/proc/sys/net/bridge/bridge-nf-call-ip6tables

systemctl enable docker && systemctl start docker
systemctl enable kubelet && systemctl start kubelet
#speed up docker images
cat > /etc/docker/daemon.json <<EOF
{
  "exec-opts": ["native.cgroupdriver=systemd"],
  "log-driver": "json-file",
  "log-opts": {
    "max-size": "100m"
  },
  "storage-driver": "overlay2",
  "storage-opts": [
    "overlay2.override_kernel_check=true"
  ]
}
EOF
systemctl daemon-reload
systemctl restart docker

docker login --username=DOCKER_REGISTRY -p PASSWOD

docker pull registry.cn-chengdu.aliyuncs.com/shixiong/kube-apiserver:${TAG_INFO}
docker pull registry.cn-chengdu.aliyuncs.com/shixiong/kube-controller-manage:${TAG_INFO}
docker pull registry.cn-chengdu.aliyuncs.com/shixiong/kube-scheduler:${TAG_INFO}
docker pull registry.cn-chengdu.aliyuncs.com/shixiong/kube-proxy:${TAG_INFO}
docker pull registry.cn-chengdu.aliyuncs.com/shixiong/pause:3.1
docker pull registry.cn-chengdu.aliyuncs.com/shixiong/etcd:3.3.15-0
docker pull registry.cn-chengdu.aliyuncs.com/shixiong/coredns:1.6.2
 
docker tag registry.cn-chengdu.aliyuncs.com/shixiong/kube-apiserver:${TAG_INFO}  k8s.gcr.io/kube-apiserver:v1.16.3
docker tag registry.cn-chengdu.aliyuncs.com/shixiong/kube-controller-manage:${TAG_INFO}  k8s.gcr.io/kube-controller-manager:v1.16.3
docker tag registry.cn-chengdu.aliyuncs.com/shixiong/kube-scheduler:${TAG_INFO}  k8s.gcr.io/kube-scheduler:v1.16.3
docker tag registry.cn-chengdu.aliyuncs.com/shixiong/kube-proxy:${TAG_INFO}  k8s.gcr.io/kube-proxy:v1.16.3
docker tag registry.cn-chengdu.aliyuncs.com/shixiong/pause:3.1 k8s.gcr.io/pause:3.1
docker tag registry.cn-chengdu.aliyuncs.com/shixiong/etcd:3.3.15-0 k8s.gcr.io/etcd:3.3.15-0
docker tag registry.cn-chengdu.aliyuncs.com/shixiong/coredns:1.6.2 k8s.gcr.io/coredns:1.6.2
 
docker rmi registry.cn-chengdu.aliyuncs.com/shixiong/kube-apiserver:${TAG_INFO}
docker rmi registry.cn-chengdu.aliyuncs.com/shixiong/kube-controller-manage:${TAG_INFO}
docker rmi registry.cn-chengdu.aliyuncs.com/shixiong/kube-scheduler:${TAG_INFO}
docker rmi registry.cn-chengdu.aliyuncs.com/shixiong/kube-proxy:${TAG_INFO}
docker rmi registry.cn-chengdu.aliyuncs.com/shixiong/pause:3.1
docker rmi registry.cn-chengdu.aliyuncs.com/shixiong/etcd:3.3.15-0
docker rmi registry.cn-chengdu.aliyuncs.com/shixiong/coredns:1.6.2



kubeadm init --ignore-preflight-errors=Swap --service-cidr=10.96.0.0/12 --pod-network-cidr=10.244.0.0/16 --apiserver-advertise-address 192.168.10.151


mkdir -p $HOME/.kube
cp -i /etc/kubernetes/admin.conf $HOME/.kube/config
chown $(id -u):$(id -g) $HOME/.kube/config

#install fannel
wget  https://raw.githubusercontent.com/coreos/flannel/master/Documentation/kube-flannel.yml
kubectl apply -f kube-flannel.yml