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dns: increase TimeToVisible before DNS unavailable warning (#13317)

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Updates tailscale/tailscale#13314

Some users are reporting 'DNS unavailable' spurious (?) warnings, especially on Android:

https://old.reddit.com/r/Tailscale/comments/1f2ow3w/health_warning_dns_unavailable_on_tailscale/
https://old.reddit.com/r/Tailscale/comments/1f3l2il/health_warnings_dns_unavailable_what_does_it_mean/

I suspect this is caused by having a too low TimeToVisible setting on the Warnable, which triggers the unhealthy state during slow network transitions.

Signed-off-by: Andrea Gottardo <andrea@gottardo.me>
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Andrea Gottardo 2024-08-29 11:43:38 -07:00 committed by GitHub
parent 0926954cf5
commit a584d04f8a
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1 changed files with 1 additions and 1 deletions
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net/dns/resolver/forwarder.go
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@ -181,7 +181,7 @@ func clampEDNSSize(packet []byte, maxSize uint16) {
DependsOn: []*health.Warnable{health.NetworkStatusWarnable},
Text: health.StaticMessage("Tailscale can't reach the configured DNS servers. Internet connectivity may be affected."),
ImpactsConnectivity: true,
TimeToVisible: 5 * time.Second,
TimeToVisible: 15 * time.Second,
})
type route struct {