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Add config coredns_external_zones (#5280)
Allows to add custom zone resolving servers.
pull/5628/head
Mateus Caruccio
5 years ago
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2 changed files with
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docs/dns-stack.md
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roles/kubernetes-apps/ansible/templates/coredns-config.yml.j2
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@ -42,6 +42,36 @@ DNS servers in early cluster deployment when no cluster DNS is available yet. |
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## DNS modes supported by Kubespray |
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### coredns_external_zones |
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Array of optional external zones to coredns forward queries to. It's injected into |
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`coredns`' config file before default kubernetes zone. Use it as an optimization for well-known zones and/or internal-only |
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domains, i.e. VPN for internal networks (default is unset) |
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Example: |
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```yaml |
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coredns_external_zones: |
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- zones: |
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- example.com |
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- example.io:1053 |
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nameservers: |
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- 1.1.1.1 |
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- 2.2.2.2 |
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cache: 5 |
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- zones: |
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- https://mycompany.local:4453 |
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nameservers: |
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- 192.168.0.53 |
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cache: 0 |
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``` |
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or as INI |
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```ini |
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coredns_external_zones=[{"cache": 30,"zones":["example.com","example.io:453"],"nameservers":["1.1.1.1","2.2.2.2"]}]' |
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``` |
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You can modify how Kubespray sets up DNS for your cluster with the variables ``dns_mode`` and ``resolvconf_mode``. |
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### dns_mode |
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@ -8,6 +8,18 @@ metadata: |
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addonmanager.kubernetes.io/mode: EnsureExists |
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data: |
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Corefile: | |
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{% if coredns_external_zones is defined and coredns_external_zones|length > 0 %} |
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{% for block in coredns_external_zones %} |
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{{ block['zones'] | join(' ') }} { |
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log |
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errors |
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forward . {{ block['nameservers'] | join(' ') }} |
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loadbalance |
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cache {{ block['cache'] | default(5) }} |
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reload |
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} |
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{% endfor %} |
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{% endif %} |
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.:53 { |
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errors |
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health |
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