ipmi问题导致很多系统卡在ipmiload或者无法安装

Today, when I restart a failed server, stuck inLoading module ipmi_si_drv …, about 30 minutes boot is completed.

First try setting IPMI toSharedin BIOS, if the option is available. When booting your installation media, pressShiftOto display the boot arguments and addnoipmiEnabledto the boot arguments. Remember to do the same once the
installation/upgrade is complete. Manually turn off or remove the module
by turning the optionVMkernel.Boot.ipmiEnabledoff in vSphere or using the commands below:

# Do a dry run first:
esxcli software vib remove –dry-run –vibname ipmi-ipmi-si-drv
# Remove the module:
esxcli software vib remove –vibname ipmi-ipmi-si-drv

or try the following command in an unsupported shell connection:

esxcfg-module -d ipmi_si_drv

This disables the module although it still gets loaded.

Use a-largument to see what modules are enabled/loaded
and check that your desired one is disabled. This appears to be
persistent across a reboot.

dhcp滥用问题

近期发现网络中有滥发dhcp,导致云服务器无法获取到争取的外网ip

查处发送dhcp网段为192.168.30

在交换机ACL规则关闭68端口无效

最终在母鸡中临时关闭

iptables -t mangle -I PREROUTING -s 192.168.30.1 -jDROP

尝试在母鸡中疯掉68,但是会导致母鸡本身发出的dhcp也被疯掉。

只有在观察了