2、kubernetes的Kubeadm 部署安装

kube-proxy开启ipvs的前置条件

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 软件

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

## 创建 /etc/docker 目录
mkdir /etc/docker

# 配置 daemon.
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

# 重启docker服务
systemctl daemon-reload && systemctl restart docker && systemctl enable docker

安装 Kubeadm （主从配置）

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

初始化主节点

kubeadm config print init-defaults > kubeadm-config.yaml
    localAPIEndpoint:
        advertiseAddress: 192.168.66.10
    kubernetesVersion: v1.15.1
    networking:
        podSubnet: "10.244.0.0/16"
        serviceSubnet: 10.96.0.0/12
    ---
    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

加入主节点以及其余工作节点

执行安装日志中的加入命令即可

部署网络

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