110 lines
2.9 KiB
Bash
110 lines
2.9 KiB
Bash
#!/bin/bash
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set -e
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# Kubernetes 环境准备脚本
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# 功能: 在所有节点准备 Kubernetes 运行环境
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echo "==== Kubernetes 环境准备 ===="
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# 定义节点列表
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NODES=("172.17.0.15:master" "172.17.0.43:node1" "172.17.0.34:node2")
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# 本机 IP 与 SSH 选项
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LOCAL_IP=$(ip route get 1 | awk '{print $7; exit}')
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SSH_OPTS='-o StrictHostKeyChecking=no -o UserKnownHostsFile=/dev/null -o BatchMode=yes'
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# SSH 私钥（可用环境变量 SSH_KEY 覆盖），存在则自动携带
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SSH_KEY_PATH=${SSH_KEY:-$HOME/.ssh/id_rsa}
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[ -f "$SSH_KEY_PATH" ] && SSH_ID="-i $SSH_KEY_PATH" || SSH_ID=""
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# 函数：在所有节点执行命令
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execute_on_all_nodes() {
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local command="$1"
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local description="$2"
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echo "==== $description ===="
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for node in "${NODES[@]}"; do
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IFS=':' read -r ip hostname <<< "$node"
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echo "在 $hostname ($ip) 执行: $command"
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if [ "$ip" = "$LOCAL_IP" ] || [ "$hostname" = "master" ]; then
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bash -lc "$command"
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else
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ssh $SSH_OPTS $SSH_ID ubuntu@$ip "$command"
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fi
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done
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echo ""
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}
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# 函数：传输文件到所有节点
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copy_to_all_nodes() {
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local file="$1"
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echo "==== 传输文件 $file 到所有节点 ===="
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for node in "${NODES[@]}"; do
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IFS=':' read -r ip hostname <<< "$node"
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echo "传输到 $hostname ($ip)"
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if [ "$ip" = "$LOCAL_IP" ] || [ "$hostname" = "master" ]; then
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cp -f "$file" ~/
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else
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scp $SSH_OPTS $SSH_ID "$file" ubuntu@$ip:~/
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fi
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done
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echo ""
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}
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# 创建环境准备脚本
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cat > k8s-prepare-env.sh << 'EOF_OUTER'
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#!/bin/bash
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set -e
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echo "==== Kubernetes 环境准备 ===="
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# 1. 更新系统包
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echo "更新系统包..."
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sudo apt update && sudo apt upgrade -y
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# 2. 安装必要的工具
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echo "安装必要工具..."
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sudo apt install -y curl wget gnupg lsb-release ca-certificates apt-transport-https software-properties-common
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# 3. 禁用 swap
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echo "禁用 swap..."
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sudo swapoff -a
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sudo sed -i '/ swap / s/^\(.*\)$/#\1/g' /etc/fstab
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# 4. 配置内核参数
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echo "配置内核参数..."
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cat <<EOF_MODULES | sudo tee /etc/modules-load.d/k8s.conf
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overlay
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br_netfilter
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EOF_MODULES
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sudo modprobe overlay
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sudo modprobe br_netfilter
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# 5. 配置 sysctl 参数
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echo "配置 sysctl 参数..."
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cat <<EOF_SYSCTL | sudo tee /etc/sysctl.d/k8s.conf
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net.bridge.bridge-nf-call-iptables = 1
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net.bridge.bridge-nf-call-ip6tables = 1
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net.ipv4.ip_forward = 1
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EOF_SYSCTL
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sudo sysctl --system
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# 6. 配置防火墙
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echo "配置防火墙..."
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sudo ufw --force disable || true
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# 按你的要求，不在节点上修改 /etc/hosts
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echo "==== 环境准备完成 ===="
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echo "当前主机名: $(hostname)"
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echo "当前 IP: $(ip route get 1 | awk '{print $7; exit}')"
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echo "Swap 状态: $(swapon --show | wc -l) 个 swap 分区"
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EOF_OUTER
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chmod +x k8s-prepare-env.sh
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copy_to_all_nodes k8s-prepare-env.sh
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execute_on_all_nodes "./k8s-prepare-env.sh" "环境准备"
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echo "==== 环境准备完成 ===="
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