修改主机名

hostnamectl set-hostname k8s-master01  master节点
hostnamectl set-hostname k8s-node01  node01节点
hostnamectl set-hostname k8s-node02  node02节点

安装依赖(所有节点)

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

关闭防火墙(所有节点)

systemctl stop firewalld 
systemctl disable firewalld

关闭 swapoff分区、SELINUX(所有节点)

swapoff -a && sed -i '/ swap / s/^\(.*\)$/#\1/g' /etc/fstab
setenforce 0 && sed -i 's/^SELINUX=.*/SELINUX=disabled/' /etc/selinux/config

调整内核参数(所有节点)

cat > kubernetes.conf <<EOF net.bridge.bridge-nf-call-iptables=1 net.bridge.bridge-nf-call-ip6tables=1 net.ipv4.ip_forward=1 net.ipv4.tcp_tw_recycle=0
vm.swappiness=0 # 禁止使用 swap 空间,只有当系统 OOM 时才允许使用它
vm.overcommit_memory=1 # 不检查物理内存是否够用
vm.panic_on_oom=0 # 开 启 OOM
fs.inotify.max_user_instances=8192 fs.inotify.max_user_watches=1048576 fs.file-max=52706963 fs.nr_open=52706963 net.ipv6.conf.all.disable_ipv6=1 net.netfilter.nf_conntrack_max=2310720 EOF
cp kubernetes.conf /etc/sysctl.d/kubernetes.conf sysctl -p /etc/sysctl.d/kubernetes.conf

调整系统时区*(所有节点)

timedatectl set-timezone Asia/Shanghai
timedatectl set-local-rtc 0

升级系统内核为 (也可不做

CentOS 7.x 系统自带的 3.10.x 内核存在一些 Bugs,导致运行的 Docker、Kubernetes 不稳定,例如: rpm -Uvh http://www.elrepo.org/elrepo-release-7.0-3.el7.elrepo.noarch.rpm
rpm -Uvh http://www.elrepo.org/elrepo-release-7.0-3.el7.elrepo.noarch.rpm

yum --enablerepo=elrepo-kernel install -y kernel-lt

grub2-set-default 'CentOS Linux (4.4.189-1.el7.elrepo.x86_64) 7 (Core)'

kube-proxy开启ipvs(所有节点)

modprobe br_netfilter
cat > /etc/sysconfig/modules/ipvs.modules <<EOF #!/bin/bash
modprobe -- ip_vs modprobe -- ip_vs_rr modprobe -- ip_vs_wrr modprobe -- ip_vs_sh
modprobe -- nf_conntrack_ipv4 EOF
chmod 755 /etc/sysconfig/modules/ipvs.modules && bash /etc/sysconfig/modules/ipvs.modules && lsmod | grep -e ip_vs -e nf_conntrack_ipv4

安装 Docker (所有节点)

yum install -y yum-utils device-mapper-persistent-data lvm2
 
yum-config-manager \
--add-repo \
http://mirrors.aliyun.com/docker-ce/linux/centos/docker-ce.repo yum update -y && yum install -y docker-ce
cat > /etc/docker/daemon.json <<EOF
{
"exec-opts": ["native.cgroupdriver=systemd"], "log-driver": "json-file",
"log-opts": {
"max-size": "100m"
}
} EOF
mkdir -p /etc/systemd/system/docker.service.d
systemctl daemon-reload && systemctl restart docker && systemctl enable docker

安装 Kubeadm (所有节点)

cat <<EOF > /etc/yum.repos.d/kubernetes.repo [kubernetes]
name=Kubernetes baseurl=http://mirrors.aliyun.com/kubernetes/yum/repos/kubernetes-el7-x86_64 enabled=1
gpgcheck=0 repo_gpgcheck=0
gpgkey=http://mirrors.aliyun.com/kubernetes/yum/doc/yum-key.gpg http://mirrors.aliyun.com/kubernetes/yum/doc/rpm-package-key.gpg EOF
 
yum -y install kubeadm-1.15.1 kubectl-1.15.1 kubelet-1.15.1 systemctl enable kubelet.service

初始化master节点

kubeadm config print init-defaults > kubeadm-config.yaml 
修改:
localAPIEndpoint:
   advertiseAddress: 192.168.10.10 
kubernetesVersion: v1.15.1 
networking:
   podSubnet: "10.244.0.0/16" 
   serviceSubnet: 10.96.0.0/12


添加:(网络模式改为ipvs模式)最下面即可
---
apiVersion: kubeproxy.config.k8s.io/v1alpha1 
kind: KubeProxyConfiguration
featureGates:
  SupportIPVSProxyMode: true 
mode: ipvs

 
kubeadm init --config=kubeadm-config.yaml --experimental-upload-certs | tee kubeadm-init.log

节点加入初始化

kubeadm-init.log 看日志信息执行安装日志中的加入命令即可 

安装flannel

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

验证集群

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