kubespray/roles/kubernetes-apps/ansible/templates/coredns-config.yml.j2

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---
apiVersion: v1
kind: ConfigMap
metadata:
name: coredns
namespace: kube-system
labels:
addonmanager.kubernetes.io/mode: EnsureExists
data:
Corefile: |
{% if coredns_external_zones is defined and coredns_external_zones|length > 0 %}
{% for block in coredns_external_zones %}
{{ block['zones'] | join(' ') }} {
log
errors
forward . {{ block['nameservers'] | join(' ') }}
loadbalance
cache {{ block['cache'] | default(5) }}
reload
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{% if dns_etchosts | default(None) %}
hosts /etc/coredns/hosts {
fallthrough
}
{% endif %}
}
{% endfor %}
{% endif %}
.:53 {
errors
health {
lameduck 5s
}
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ready
kubernetes {{ dns_domain }} {% if enable_coredns_reverse_dns_lookups %}in-addr.arpa ip6.arpa {% endif %}{
pods insecure
{% if enable_coredns_k8s_endpoint_pod_names %}
endpoint_pod_names
{% endif %}
{% if enable_coredns_reverse_dns_lookups %}
fallthrough in-addr.arpa ip6.arpa
{% endif %}
}
prometheus :9153
{% if upstream_dns_servers is defined and upstream_dns_servers|length > 0 %}
forward . {{ upstream_dns_servers|join(' ') }} {
prefer_udp
}
{% else %}
forward . /etc/resolv.conf {
prefer_udp
}
{% endif %}
{% if enable_coredns_k8s_external %}
k8s_external {{ coredns_k8s_external_zone }}
{% endif %}
{{ coredns_default_zone_cache_block | indent(width=8, first=False) }}
loop
reload
loadbalance
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{% if dns_etchosts | default(None) %}
hosts /etc/coredns/hosts {
fallthrough
}
{% endif %}
}
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{% if dns_etchosts | default(None) %}
hosts: |
{{ dns_etchosts | indent(width=4, first=False) }}
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{% endif %}