Kristoffer Dalby 4a8dc2d445 hscontrol/state,db: preserve node expiry on MapRequest updates ...

Fixes a regression introduced in v0.27.0 where node expiry times were
being reset to zero when tailscaled restarts and sends a MapRequest.

The issue was caused by using GORM's Save() method in persistNodeToDB(),
which overwrites ALL fields including zero values. When a MapRequest
updates a node (without including expiry information), Save() would
overwrite the database expiry field with a zero value.

Changed to use Updates() which only updates non-zero values, preserving
existing database values when struct pointer fields are nil.

In BackfillNodeIPs, we need to explicitly update IPv4/IPv6 fields even
when nil (to remove IPs), so we use Select() to specify those fields.

Added regression test that validates expiry is preserved after MapRequest.

Fixes #2862

2025-11-11 12:47:48 -06:00

8.8 KiB

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