Comments (13)
chrislovecnm
commented on August 27, 2024
I am assuming this is a tcp vs udp problem.
- changed the configmap to use a pod ip, which allows for udp.
- login to the dig pod in west
- dig us-east-1-cluster.local - succeeds
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cmluciano
commented on August 27, 2024
/sig aws
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k8s-ci-robot
commented on August 27, 2024
@cmluciano: These labels do not exist in this repository: sig/aws.
In response to this:
/sig aws
Instructions for interacting with me using PR comments are available here. If you have questions or suggestions related to my behavior, please file an issue against the kubernetes/test-infra repository. I understand the commands that are listed here.
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cmluciano
commented on August 27, 2024
Any ideas on this @justinsb
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bowei
commented on August 27, 2024
Do normal resolvers try TCP if UDP fails? I know the truncation code path tries TCP if the reply is too big, but not sure what happens when there is no reply at all...
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chrislovecnm
commented on August 27, 2024
@cmluciano I am one of the sig-aws maintainers btw :)
@bowei it is not working with the ELB that is TCP only. So I would say no
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chrislovecnm
commented on August 27, 2024
@bowei to add a bit more clarity.
- ELB in place with TCP only
- Outside client executing a dig command setting dig to work only with TCP.
- Dig command fails
From this workflow, I would say that the DNS pod is not working on the ELB. I am able to use the pod locally fine. Any ideas on debugging?
If the client communicated with the DNS internal cluster IP address it works fine, but the IP pod ip address is not guaranteed, so I need an external ELB service.
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fejta-bot
commented on August 27, 2024
Issues go stale after 90d of inactivity.
Mark the issue as fresh with /remove-lifecycle stale.
Stale issues rot after an additional 30d of inactivity and eventually close.
Prevent issues from auto-closing with an /lifecycle frozen comment.
If this issue is safe to close now please do so with /close.
Send feedback to sig-testing, kubernetes/test-infra and/or @fejta.
/lifecycle stale
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chrislovecnm
commented on August 27, 2024
/lifecycle frozen
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prameshj
commented on August 27, 2024
You can try using nodelocaldns, which connects to upstream servers via TCP by design. It now supports stubDomains configured in kube-dns configmap. Updated image - k8s.gcr.io/k8s-dns-node-cache:1.15.6
You can use a yaml similar to https://github.com/kubernetes/kubernetes/pull/82845/files, you don't need all those changes. Just the part that mounts the kube-dns configmap.
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prameshj
commented on August 27, 2024
/assign @chrislovecnm
anything more needed here?
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chrislovecnm
commented on August 27, 2024
I have not tested this @prameshj or touched this in a while. I would say close it unless someone wants to recreate it
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prameshj
commented on August 27, 2024
/close
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