kubespray/roles/kubernetes/preinstall/templates/resolved.conf.j2

[Resolve]
{% if not dns_early and dns_late %}
DNS={{ ([nodelocaldns_ip] if enable_nodelocaldns else coredns_server )| list | join(' ') }}
{% endif %}
FallbackDNS={{ ( upstream_dns_servers|d([]) + nameservers|d([]) + cloud_resolver|d([])) | unique | join(' ') }}
{% if remove_default_searchdomains and searchdomains|default([])|length != 0 %}
Domains={{ searchdomains|default([]) | join(' ') }}
{% else %}
Domains={{ ([ 'default.svc.' + dns_domain, 'svc.' + dns_domain ] + searchdomains|default([])) | join(' ') }}
{% endif %}
DNSSEC=no
Cache=no-negative
{% if systemd_resolved_disable_stub_listener | bool %}
DNSStubListener=no
{% endif %}