ECS DNS

ZJADC (Aliyun Directed Cloud)

Append content in /etc/resolv.conf

options timeout:2 attempts:3 rotate
nameserver 10.255.9.2
nameserver 10.200.12.5

And then you probably need to modify yum.repo.d as well, check link

YQGCY (Aliyun Directed Cloud)

Append content in /etc/resolv.conf

nameserver 172.27.205.79

And then restart kube-system.coredns-xxxx

Google DNS

nameserver 8.8.8.8
nameserver 4.4.4.4
nameserver 223.5.5.5
nameserver 223.6.6.6

Restart DNS

OS:

vim /etc/NetworkManager/NetworkManager.conf

vim /etc/NetworkManager/NetworkManager.conf

sudo systemctl is-active systemd-resolved
sudo resolvectl flush-caches
# or sudo systemd-resolve --flush-caches

add "dns=none" under '[main]' part

systemctl restart NetworkManager

Modify `ifcfg-ethX` [Optional]

if you cannot get ipv4 address, you can try to modify ifcfg-ethX

vim /etc/sysconfig/network-scripts/ifcfg-ens33

set ONBOOT=yes