kubenetes 1.15.0 安装脚本

梦里梦外; 2021-12-18 23:43 150阅读 0赞

# k8s 安装脚本 #

#!/bin/bash
    # command from office website （https://kubernetes.io/docs/setup/production-environment/tools/kubeadm/install-kubeadm/ && other place
    
    # config aliyun k8s repo
    setup_k8s_repo() {
    cat <<EOF > /etc/yum.repos.d/aliyun-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
    
    # Set SELinux in permissive mode (effectively disabling it)
    setenforce 0
    sed -i 's/^SELINUX=enforcing$/SELINUX=disabled/' /etc/selinux/config
    systemctl stop firewalld.service && systemctl disable firewalld.service
    yum install -y kubelet kubeadm kubectl --disableexcludes=kubernetes
    systemctl enable --now kubelet
    }
    
    # set sysctl
    sysctl_config(){
    cat <<EOF >  /etc/sysctl.d/k8s.conf
    net.bridge.bridge-nf-call-ip6tables = 1
    net.bridge.bridge-nf-call-iptables = 1
    EOF
    sysctl --system
    
    yum -y install chrony && systemctl start chronyd.service && systemctl enable chronyd.service
    }
    
    # swapoff
    swapoff(){
      /sbin/swapoff -a
      sed -i '/ swap / s/^$.*$$/#\1/g' /etc/fstab
      echo "vm.swappiness=0" >> /etc/sysctl.conf
      /sbin/sysctl -p
    }
    
    net_module() {
        lsmod | grep br_netfilter
    if [ $? -eq 0 ];then
      echo "br_netfilter module is loaded!"
      else
      modprobe br_netfilter
    fi 
    }
    
    main() {
        setup_k8s_repo
        sysctl_config
        swapoff
        net_module
    }
    
    main
    
    
    # kubeadm init
    
    kubeadm init --image-repository registry.aliyuncs.com/google_containers --kubernetes-version v1.15.0 --pod-network-cidr=192.168.0.0/16 --token-ttl 0