The module has 1 alert.
The module is enabled by default in the Default
bundle.
The module is disabled by default in the following bundles: Managed
, Minimal
.
The module is configured using the ModuleConfig custom resource named kube-dns
(learn more about setting up Deckhouse…).
Example of the ModuleConfig/kube-dns
resource for configuring the module:
apiVersion: deckhouse.io/v1alpha1
kind: ModuleConfig
metadata:
name: kube-dns
spec:
version: 1
enabled: true
settings: # <-- Module parameters from the "Parameters" section below.
Parameters
Schema version: 1
- clusterDomainAliases
A list of cluster domain aliases; these are resolved on par with
global.discovery.clusterDomain
.Please note: the domain alias must not match the domain used in the DNS name template in the publicDomainTemplate parameter.
- Element of the array
Pattern:
^[0-9a-zA-Z\.-]+$
- enableLogs
Enable CoreDNS logging.
Default:
false
- hosts
Not required value.
A static list of hosts similar to that of
/etc/hosts
.- hosts.domain
Pattern:
^[0-9a-zA-Z\.-]+$
- hosts.ip
Pattern:
^[0-9]{1,}\.[0-9]{1,}\.[0-9]{1,}\.[0-9]{1,}$
- stubZones
A list of additional zones CoreDNS should be authoritative for.
Default:
[]
Example:
stubZones: - zone: example.com upstreamNameservers: - 8.8.8.8 cacheTTLSeconds: 3600 transportProtocolMode: PreferUDP
- stubZones.cacheTTLSeconds
Max TTL in seconds for NOERROR responses.
Default:
30
Allowed values:
1 <= X <= 3600
- stubZones.transportProtocolMode
The mode of the transport protocol for communicating with the upstream DNS server:
PreferUDP
— UDP is used, even if the original request came over TCP. Note that if the DNS response from the upstream DNS server exceeds 512 bytes and has been truncated and marked with the TC bit (RFC 1035), then it will be resent over TCP (RFC 5966). The request will not be resent over TCP if there are other UDP issues.ForceTCP
— Always uses TCP, even if the original request is over UDP.KeepOriginal
— Uses the same protocol (TCP or UDP) as the original request.
Default:
"PreferUDP"
Allowed values:
PreferUDP
,ForceTCP
,KeepOriginal
- stubZones.upstreamNameservers
Required value
A list of IP addresses of recursive DNS servers that CoreDNS will use to resolve domains in this zone.
- Element of the array
Pattern:
^[0-9]{1,}\.[0-9]{1,}\.[0-9]{1,}\.[0-9]{1,}(:[0-9]{1,})?$
- stubZones.zone
Required value
The CoreDNS zone.
Pattern:
^[0-9a-zA-Z\.-]+$
Example:
zone: consul.local
- transportProtocolMode
The mode of the transport protocol for communicating with the upstream DNS server:
PreferUDP
— UDP is used, even if the original request came over TCP. Note that if the DNS response from the upstream DNS server exceeds 512 bytes and has been truncated and marked with the TC bit (RFC 1035), then it will be resent over TCP (RFC 5966). The request will not be resent over TCP if there are other UDP issues.ForceTCP
— Always uses TCP, even if the original request is over UDP.KeepOriginal
— Uses the same protocol (TCP or UDP) as the original request.
Default:
"PreferUDP"
Allowed values:
PreferUDP
,ForceTCP
,KeepOriginal
- upstreamNameservers
A list of IP addresses of recursive DNS servers that CoreDNS will use to resolve external domains.
By default, the
/etc/resolv.conf
list is used.- Element of the array
Pattern:
^[0-9]{1,}\.[0-9]{1,}\.[0-9]{1,}\.[0-9]{1,}(:[0-9]{1,})?$