oracle / oracle/oci-cloud-controller-manager

Provide an annotation to disable appending private NLB IP address to service external IPs

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Dominant language
Go
Stars
158
Forks
108
PR merge metrics
No merged PRs in 30d

Description

Is this a BUG REPORT or FEATURE REQUEST?

Choose one: FEATURE REQUEST

When creating a Service of type LoadBalancer it's ExternalIPs value will be used by components such as external-dns to create A records for traffic routing, however, as the private internal IPv4 address of the NLB is appended to the Ingress IPs property of the LoadBalancerStatus returned to service and both the public IPv4 and private IPv4 are added to DNS.

It would be helpful to disable this functionality when external-dns, or other components which reference this property and expect only public IP addresses are deployed.

https://github.com/kubernetes-sigs/external-dns/issues/2810 - Issue discussing this in external-dns

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First steps

  1. Read the whole issue, then the project's contributing guide.
  2. Comment on the issue to say you are picking it up — it saves two people doing the same work.
  3. Fork the repository and make your change on a branch.
  4. Open a pull request that references the issue number.

Research direction

Start by tracing how the OCI cloud controller manager populates the Kubernetes Service LoadBalancerStatus Ingress IPs for a LoadBalancer backed by an NLB. Define how an annotation should be read and verify that it suppresses the private NLB address while retaining public addresses, including coverage for external-dns-style consumers.

Written by the indexing model from the issue text.

Assessment

Tech stack
go, kubernetes
Domain
cloud, networking
Issue type
Feature
Difficulty
4/5
Estimated time
3-5 days
Activity status
Stale
Clarity
Mostly clear
Newbie friendliness
38/100

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