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Is it possible to set what DNS server cloudflare tunnels uses when resolving local ips? (lemmy.zip)

submitted 3 months ago by SpiderUnderUrBed@lemmy.zip to c/selfhosted@lemmy.world

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Title. I am in a k8s cluster, and I constantly get DNS issues in it, for some reason, it is using my resolv.conf, and since I have tailscale it tends to overwrite my resolv.conf, i don't think there is a way to fix it, also, I have multiple clusters and I don't know how to exactly use the proper names, I set up stuff like PowerDNS, but I want it so that, some of cloudflare tunnels queries goes through this nameserver, while some of it goes through other nameservers, the way k8s handles dns internally leads to some weird stuff where, if a DNS server says NXDOMAIN, it wont try the next one, and just general buggy behavior.

(to better explain, I dont have direct ips in my tunnel configuration, as I would have to change them often, I use DNS names, and intend to continue using DNS)

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[–] just_another_person@lemmy.world 4 points 3 months ago (1 children)

https://kubernetes.io/docs/tasks/administer-cluster/dns-custom-nameservers/

[–] beerclue@lemmy.world 3 points 3 months ago

Yeah, I think coredns offers all the options you need.

[–] 2xsaiko@discuss.tchncs.de 4 points 3 months ago

It sounds like you need a split DNS setup. systemd-resolved can do this for example. As soon as you need any sort of slightly more complex DNS setup using just resolv.conf isn't going to cut it.