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tailscale/net/dns/resolver
Jonathan Nobels 19b0c8a024
net/dns, health: raise health warning for failing forwarded DNS queries (#12888)
updates tailscale/corp#21823

Misconfigured, broken, or blocked DNS will often present as
"internet is broken'" to the end user.  This  plumbs the health tracker
into the dns manager and forwarder and adds a health warning
with a 5 second delay that is raised on failures in the forwarder and
lowered on successes.

Signed-off-by: Jonathan Nobels <jonathan@tailscale.com>
3 months ago
..
debug.go all: use Go 1.22 range-over-int 7 months ago
doh_test.go net/dns/resolver: remove maxDoHInFlight 2 years ago
forwarder.go net/dns, health: raise health warning for failing forwarded DNS queries (#12888) 3 months ago
forwarder_test.go net/dns, health: raise health warning for failing forwarded DNS queries (#12888) 3 months ago
macios_ext.go all: avoid repeated default interface lookups 2 years ago
tsdns.go net/dns, health: raise health warning for failing forwarded DNS queries (#12888) 3 months ago
tsdns_server_test.go all: update copyright and license headers 2 years ago
tsdns_test.go net/dns, health: raise health warning for failing forwarded DNS queries (#12888) 3 months ago