add IPv6 to cluster-dns Usage Docs #11498
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brandond
approved these changes
Dec 24, 2024
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Codecov ReportAll modified and coverable lines are covered by tests ✅
Additional details and impacted files@@ Coverage Diff @@
## master #11498 +/- ##
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- Coverage 48.44% 43.80% -4.65%
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Files 181 181
Lines 18809 18809
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- Hits 9112 8239 -873
- Misses 8348 9359 +1011
+ Partials 1349 1211 -138
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Signed-off-by: rivolity <[email protected]>
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Proposed Changes
This update is based on the related PR/MR: rancher/rke2-docs#303.
While the RKE2/K3s clusterDNS variable (cluster-dns) supports both IPv4 and IPv6, the current documentation does not explicitly mention the option to use an IPv6 address for the cluster DNS. Users can configure the cluster DNS to use an IPv4, IPv6, or dual-stack address, as supported by the relevant script logic.
Types of Changes
Add explicit documentation for IPv6 support in the ClusterDNS usage section, highlighting its capability to handle IPv6 addresses.
Verification
The ClusterDNS can be configured to use IPv4/IPv6 addresses based on the CIDRs specified in config.yaml. By default, the IPv4 ClusterIP is 10.43.0.10. If an address from an IPv6 CIDR is specified, the ClusterDNS service will also receive an IPv6 address.
Testing
Ensure that IPv6 addresses are correctly assigned to the ClusterDNS service when an IPv6 CIDR is configured under
IPs:when usingkubectl describe svc rke2-coredns-rke2-corednsLinked Issues
This update is based on the related PR/MR: rancher/rke2-docs#303.
User-Facing Change
Further Comments