centos7升级内核 ，wireguard优化

一、centos7升级内核

uname -r 查看内核版本

升级前

升级后

参考链接： https://www.cnblogs.com/rick-zhang/p/14944510.html

# 启用 ELRepo 仓库
rpm --import https://www.elrepo.org/RPM-GPG-KEY-elrepo.org
rpm -Uvh http://www.elrepo.org/elrepo-release-7.0-2.el7.elrepo.noarch.rpm
yum --disablerepo="*" --enablerepo="elrepo-kernel" list available
yum --enablerepo=elrepo-kernel install kernel-ml

vi /etc/default/grub
修改GRUB_DEFAULT=0

# 重新创建内核配置
grub2-mkconfig -o /boot/grub2/grub.cfg

reboot

　　

2、wireguard优化

内核升级后，wireguard无法启动，报错信息如下

# wg-quick up /etc/wireguard/wg0.conf
[#] ip link add wg0 type wireguard
RTNETLINK answers: Operation not supported
Unable to access interface: Protocol not supported
[#] ip link delete dev wg0
Cannot find device "wg0"

　

参考链接：https://www.wireguard.com/install/　

重新安装后恢复

yum install yum-utils epel-release
yum-config-manager --setopt=centosplus.includepkgs=kernel-plus --enablerepo=centosplus --save
sed -e 's/^DEFAULTKERNEL=kernel$/DEFAULTKERNEL=kernel-plus/' -i /etc/sysconfig/kernel
yum install kernel-plus wireguard-tools
reboot

　　

重新添加ip转发

vi /etc/sysctl.conf
net.ipv4.ip_forward=1

sysctl -p
echo 1 > /proc/sys/net/ipv4/ip_forward