https://ops.docs.72602.space/csp/aliyun/ecs/index.html 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: Centos/Anolis Debian Ubuntu 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 Hugo en