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                **1. 安裝要求** * 一臺或多臺運行兼容 deb/rpm 的 Linux 操作系統的計算機;例如:Ubuntu 或 CentOS。 * 每臺機器至少:內存 2GB+,2個 CPU+,硬盤 30GB+。 * Master 節點的處理器數量必須至少是 2 核。 ![](https://img.kancloud.cn/ff/c6/ffc655db6f9b0165c155c7575f601e4b_1393x472.jpg) * 集群中所有機器之間網絡互通。 * 可以訪問外網。因為需要拉取鏡像,如果服務器不能上網,需要提前下載鏡像并導入節點。 **2. 先準備 3 臺機器** ![](https://img.kancloud.cn/d2/53/d2533358b92262b5d692681ced3ff62f_1964x264.png) <br/> **3. 分別設置各個機器的主機名** ```shell (1)k8s-master1 節點上設置 # hostnamectl set-hostname k8s-master1 (2)k8s-node1 節點上設置 # hostnamectl set-hostname k8s-node1 (3)k8s-node2 節點上設置 # hostnamectl set-hostname k8s-node2 (4)重啟所有節點 # reboot ``` <br/> **4. 時間同步【所有節點】** ```shell # yum install ntpdate -y # ntpdate edu.ntp.org.cn ``` <br/> **5. 關閉防火墻【所有節點】** ```shell (1)關閉防火墻 # systemctl stop firewalld.service (2)禁止防火墻開機自啟 # systemctl disable firewalld.service (3)查看防火墻是否已被關閉 # firewall-cmd --state not running ``` <br/> **6. 關閉 selinux【所有節點】** ```shell # sed -i 's/enforcing/disabled/' /etc/selinux/config # cat /etc/selinux/config SELINUX=disabled 【disabled表示已經關閉】 ``` <br/> **7. 關閉 swap【所有節點】** ```shell (1)關閉swap # swapoff -a # sed -i 's/.*swap.*/#&/' /etc/fstab (2)查看是否已經關閉 # free -h total used free shared buff/cache available Mem: 1.8G 204M 505M 8.6M 1.1G 1.4G Swap: 0B 0B 0B 【這一行都為 0 則已關閉】 ``` <br/> **8. 配置hosts【所有節點】** ```shell # cat >> /etc/hosts << EOF 192.168.1.19 k8s-master1 192.168.1.20 k8s-node1 192.168.1.21 k8s-node2 EOF ``` <br/> **9. 配置 ssh 互信【所有節點(可選)】** ```shell (1)一路回車即可 # ssh-keygen (2) # ssh-copy-id -i ~/.ssh/id_rsa.pub root@k8s-master1 # ssh-copy-id -i ~/.ssh/id_rsa.pub root@k8s-node1 # ssh-copy-id -i ~/.ssh/id_rsa.pub root@k8s-node2 ``` <br/> **10. 允許 iptables 檢查橋接流量【所有節點】** ```shell # cat > /etc/sysctl.d/k8s.conf << EOF net.bridge.bridge-nf-call-ip6tables = 1 net.bridge.bridge-nf-call-iptables = 1 EOF # sysctl --system ```
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