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This PR fixes incorrect packet TTL if `forwardKubeDNSToHost` is enabled.
Credits go to Julian Wiedmann.
Closes#8698.
Signed-off-by: Dmitriy Matrenichev <dmitry.matrenichev@siderolabs.com>
New package arrived in Go 1.22 which provides better rand primitives and functions.
Use it instead of the old one.
Signed-off-by: Dmitriy Matrenichev <dmitry.matrenichev@siderolabs.com>
Optimize `DNSResolveCacheController` type, including `dns.Server` optimization for easy start/stop. This PR ensures that we
delete server from runners on stop (even unexpected) and restart it properly. Also fixes incorrect assumption on unit-tests.
Fixes#8563
This PR also does those things:
- Removes `utils.Runner`
- Removes `ctxutil.MonitorFn`
- Removes `dns.Runner`
- Removes `network.dnsRunner`
Signed-off-by: Dmitriy Matrenichev <dmitry.matrenichev@siderolabs.com>
This PR adds the support for CoreDNS forwarding to host DNS. We try to bind on 9th address on the first element from
`serviceSubnets` and create a simple service so k8s will not attempt to rebind it.
Signed-off-by: Andrey Smirnov <andrey.smirnov@siderolabs.com>
Co-authored-by: Dmitriy Matrenichev <dmitry.matrenichev@siderolabs.com>
Signed-off-by: Dmitriy Matrenichev <dmitry.matrenichev@siderolabs.com>
Turns out there is actually no black magic in systemd, they simply listen on 127.0.0.53 and forward dns requests there in resolv.conf.
Reason is the same as ours — to preserve compatibility with other applications. So we do the same in our code.
This PR also does two things:
- Adds `::1` into resolv.conf for IPv6 only resolvers.
- Drops `SO_REUSEPORT` from control options (it works without them).
Closes#8328
Signed-off-by: Dmitriy Matrenichev <dmitry.matrenichev@siderolabs.com>
This PR adds a new controller - `DNSServerController` that starts tcp and udp dns servers locally. Just like `EtcFileController` it monitors `ResolverStatusType` and updates the list of destinations from there.
Most of the caching logic is in our "lobotomized" "`CoreDNS` fork. We need this fork because default `CoreDNS` carries
full Caddy server and various other modules that we don't need in Talos. On our side we implement
random selection of the actual dns and request forwarding.
Closes#7693
Signed-off-by: Dmitriy Matrenichev <dmitry.matrenichev@siderolabs.com>
