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Debugging Kubernetes DNS | Stream of Consciousness
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ArgoCD was timing out against the Gitea instance in the same cluster on the same node! After checking if the node could access Gitea directly it was time to put on my network hat.Basic Kubernetes advice is start with DNS. Since this issue appeared to be host centric I modified the pod manifest with a nodeSelector with arkhal. Using dig google.com was speedy with a return from the Cluster DNS service IP. When using something like dig gitea.prod.workshop.meschbach.org I was receiving the message:;; reply from unexpected source: 172.31.0.112#53, expected 10.96.0.10#53 ;; reply from unexpected source: 172.31.0.112#53, expected 10.96.0.10#53 nslookup returned similar results. cat /etc/resolv.conf produced reasonable results. Range 172.31.0.0 is the pod subnet for arkhal meaning the response is going directly from pod to pod instead of through the service. StackOverflow to the rescue, as I do not appear to be the first to encounter such an issue! A quick verification with lsmod| grpe br_net...
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