修改和新增

部署文档/Kubernetes基础环境准备.md

@@ -17,6 +17,12 @@
    ntpdate -u ntp.aliyun.com && date
    ```
 
+3. 配置定时任务
+
+   ```bash
+   0 2 * * * /usr/bin/ntpdate -u ntp.aliyun.com && /bin/date
+   ```
+
 > 离线环境使用此篇文档同步
 >
 > [NTP时间同步](https://gitee.com/offends/Linux/blob/main/Docs/NTP%E6%97%B6%E9%97%B4%E5%90%8C%E6%AD%A5.md)
@@ -120,13 +126,15 @@
    cat <<EOF | sudo tee /etc/sysctl.d/k8s.conf
    net.bridge.bridge-nf-call-ip6tables = 1
    net.bridge.bridge-nf-call-iptables = 1
+   net.ipv6.conf.all.disable_ipv6 = 1
+   net.ipv6.conf.default.disable_ipv6 = 1
    net.ipv4.ip_forward = 1
    vm.swappiness = 0
    EOF
    ```
 
    加载
-
+   
    ```bash
    sysctl --system
    ```