Add k3s cluster expansion documentation and scripts

- Complete expansion guide for 2/4/6 node scenarios
- Quick join scripts for worker and master nodes
- Health check and diagnostic scripts
- Quick reference card for common operations

scripts/generate-join-script.sh

@@ -0,0 +1,113 @@
+#!/bin/bash
+#
+# 快速配置脚本生成器
+# 为新节点生成定制化的加入脚本
+#
+
+# 颜色输出
+GREEN='\033[0;32m'
+YELLOW='\033[1;33m'
+NC='\033[0m'
+
+echo -e "${GREEN}================================${NC}"
+echo -e "${GREEN}K3s 节点加入脚本生成器${NC}"
+echo -e "${GREEN}================================${NC}"
+echo ""
+
+# 获取当前配置
+MASTER_IP="134.195.210.237"
+NODE_TOKEN="K109d35a131f48b4d40b162398a828b766d60735f29dd7b4a37b030c1d1c0e26b23::server:72e04c3a9e3e762cbdefffc96f348a2d"
+
+echo -e "${YELLOW}当前 Master 节点信息:${NC}"
+echo "IP: $MASTER_IP"
+echo "Token: ${NODE_TOKEN:0:20}..."
+echo ""
+
+# 选择节点类型
+echo "请选择要加入的节点类型:"
+echo "1) Worker 节点 (推荐用于 2 节点方案)"
+echo "2) Master 节点 (用于 HA 高可用方案)"
+echo ""
+read -p "请输入选项 (1 或 2): " NODE_TYPE
+
+if [ "$NODE_TYPE" == "1" ]; then
+    SCRIPT_NAME="join-worker-custom.sh"
+    echo ""
+    echo -e "${GREEN}生成 Worker 节点加入脚本...${NC}"
+
+    cat > $SCRIPT_NAME << 'EOFWORKER'
+#!/bin/bash
+set -e
+
+# 配置信息
+MASTER_IP="134.195.210.237"
+NODE_TOKEN="K109d35a131f48b4d40b162398a828b766d60735f29dd7b4a37b030c1d1c0e26b23::server:72e04c3a9e3e762cbdefffc96f348a2d"
+
+echo "开始加入 Worker 节点..."
+
+# 系统准备
+swapoff -a
+sed -i '/ swap / s/^/#/' /etc/fstab
+apt-get update -qq
+apt-get install -y curl open-iscsi nfs-common
+systemctl enable --now iscsid
+
+# 安装 k3s agent
+curl -sfL https://get.k3s.io | K3S_URL=https://${MASTER_IP}:6443 \
+    K3S_TOKEN=${NODE_TOKEN} sh -
+
+echo "Worker 节点加入完成！"
+echo "在 Master 节点执行: kubectl get nodes"
+EOFWORKER
+
+    chmod +x $SCRIPT_NAME
+
+elif [ "$NODE_TYPE" == "2" ]; then
+    SCRIPT_NAME="join-master-custom.sh"
+    echo ""
+    read -p "请输入负载均衡器 IP: " LB_IP
+
+    echo -e "${GREEN}生成 Master 节点加入脚本...${NC}"
+
+    cat > $SCRIPT_NAME << EOFMASTER
+#!/bin/bash
+set -e
+
+# 配置信息
+FIRST_MASTER_IP="134.195.210.237"
+LB_IP="$LB_IP"
+NODE_TOKEN="K109d35a131f48b4d40b162398a828b766d60735f29dd7b4a37b030c1d1c0e26b23::server:72e04c3a9e3e762cbdefffc96f348a2d"
+
+echo "开始加入 Master 节点 (HA 模式)..."
+
+# 系统准备
+swapoff -a
+sed -i '/ swap / s/^/#/' /etc/fstab
+apt-get update -qq
+apt-get install -y curl open-iscsi nfs-common
+systemctl enable --now iscsid
+
+# 安装 k3s server
+curl -sfL https://get.k3s.io | sh -s - server \\
+    --server https://\${FIRST_MASTER_IP}:6443 \\
+    --token \${NODE_TOKEN} \\
+    --tls-san=\${LB_IP} \\
+    --write-kubeconfig-mode 644
+
+echo "Master 节点加入完成！"
+echo "在任意 Master 节点执行: kubectl get nodes"
+EOFMASTER
+
+    chmod +x $SCRIPT_NAME
+else
+    echo "无效的选项"
+    exit 1
+fi
+
+echo ""
+echo -e "${GREEN}✓ 脚本已生成: $SCRIPT_NAME${NC}"
+echo ""
+echo "使用方法:"
+echo "1. 将脚本复制到新节点"
+echo "2. 在新节点上执行: sudo bash $SCRIPT_NAME"
+echo ""