Infrastructure: DNS on systems with systemd-resolved

[kendarorg]

For Ubuntu

https://medium.com/@niktrix/getting-rid-of-systemd-resolved-consuming-port-53-605f0234f32f

sudo lsof -i -P -n | grep LISTEN
sudo systemctl stop systemd-resolved
vi /etc/systemd/resolved.conf

[Resolve]
DNS=8.8.8.8
DNSStubListener=no

sudo ln -sf /run/systemd/resolve/resolv.conf /etc/resolv.conf

https://www.tecmint.com/set-permanent-dns-nameservers-in-ubuntu-debian/

• apt install resolvconf
• nano /etc/resolvconf/resolv.conf.d/head
• nameserver 8.8.8.8
• nameserver 8.8.4.4

https://stackoverflow.com/questions/40877643/apt-get-install-in-ubuntu-16-04-docker-image-etc-resolv-conf-device-or-reso

• RUN apt-get update
• RUN apt-get install -y apt-utils debconf-utils dialog
• RUN echo 'debconf debconf/frontend select Noninteractive' | debconf-set-selections
• RUN echo "resolvconf resolvconf/linkify-resolvconf boolean false" | debconf-set-selections
• RUN apt-get update
• RUN apt-get install -y resolvconf