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tstest/integration/testcontrol: de-flake TestUserMetricsRouteGauges

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SetSubnetRoutes was not sending update notifications to nodes when their
approved routes changed, causing nodes to not fetch updated netmaps with
PrimaryRoutes populated. This resulted in TestUserMetricsRouteGauges
flaking because it waited for PrimaryRoutes to be set, which only happened
if the node happened to poll for other reasons.

Now send updateSelfChanged notification to affected nodes so they fetch
an updated netmap immediately.

Fixes #17962

Signed-off-by: Andrew Dunham <andrew@tailscale.com>
This commit is contained in:
Andrew Dunham 2025-11-21 16:50:28 -05:00 committed by Andrew Dunham
parent 16587746ed
commit a20cdb5c93
1 changed files with 3 additions and 0 deletions
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3
tstest/integration/testcontrol/testcontrol.go
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@ -464,6 +464,9 @@ func (s *Server) SetSubnetRoutes(nodeKey key.NodePublic, routes []netip.Prefix)
defer s.mu.Unlock()
s.logf("Setting subnet routes for %s: %v", nodeKey.ShortString(), routes)
mak.Set(&s.nodeSubnetRoutes, nodeKey, routes)
if node, ok := s.nodes[nodeKey]; ok {
sendUpdate(s.updates[node.ID], updateSelfChanged)
}
}
// MasqueradePair is a pair of nodes and the IP address that the