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cmd/containerboot: track peers from IPN bus updates, stop using netmap.NetworkMap

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Some tests in another repo were broken by tailscale/tailscale#19607.
This fixes them, by finishing off the rest of the migration away from
netmap.NetworkMap on the IPN bus in containerboot.

Containerboot used to rebuild a full NetworkMap-shaped view while
reacting to IPN bus notifications. Now it insteads has its own
netmapState type (immutable) of exactly what it needs to track, and
sends those immutable values around, making cheap edits of new
immutable values when an IPN bus edit arrives.

This should make cmd/containerboot scale to much larger tailnets now too.

Fixes #19852
Fixes tailscale/corp#42347
Updates #12542

Change-Id: I88adaf061f85f677f954a764935e6654329d75a6
Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
This commit is contained in:
Brad Fitzpatrick
2026-05-27 14:12:48 -07:00
committed by Brad Fitzpatrick
parent 80dc7a8d07
commit 364b952d62
15 changed files with 508 additions and 176 deletions
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control/controlclient/map_test.go
+50
View File
@@ -1317,6 +1317,56 @@ func (nu *countingNetmapUpdater) UpdateFullNetmap(nm *netmap.NetworkMap) {
nu.full.Add(1)
}
type countingDeltaNetmapUpdater struct {
countingNetmapUpdater
delta atomic.Int64
}
func (nu *countingDeltaNetmapUpdater) UpdateNetmapDelta([]netmap.NodeMutation) bool {
nu.delta.Add(1)
return true
}
func TestExistingPeerReplacementHandledIncrementally(t *testing.T) {
nu := &countingDeltaNetmapUpdater{}
ms := newTestMapSession(t, nu)
ctx := t.Context()
peer := &tailcfg.Node{
ID: 1,
StableID: "peer",
Name: "peer.example.ts.net.",
Key: key.NewNode().Public(),
DiscoKey: key.NewDisco().Public(),
Addresses: []netip.Prefix{netip.MustParsePrefix("100.64.0.1/32")},
AllowedIPs: []netip.Prefix{netip.MustParsePrefix("100.64.0.1/32")},
Hostinfo: (&tailcfg.Hostinfo{}).View(),
}
if err := ms.handleNonKeepAliveMapResponse(ctx, &tailcfg.MapResponse{
Node: &tailcfg.Node{Name: "self.example.ts.net."},
Peers: []*tailcfg.Node{peer},
}, false); err != nil {
t.Fatal(err)
}
if got := nu.full.Load(); got != 1 {
t.Fatalf("full updates after initial response = %d; want 1", got)
}
replacement := peer.Clone()
replacement.AllowedIPs = append(replacement.AllowedIPs, netip.MustParsePrefix("100.64.0.2/32"))
if err := ms.handleNonKeepAliveMapResponse(ctx, &tailcfg.MapResponse{
PeersChanged: []*tailcfg.Node{replacement},
}, false); err != nil {
t.Fatal(err)
}
if got := nu.full.Load(); got != 1 {
t.Errorf("full updates after route-changing peer replacement = %d; want 1", got)
}
if got := nu.delta.Load(); got != 1 {
t.Errorf("delta updates after route-changing peer replacement = %d; want 1", got)
}
}
// tests (*mapSession).patchifyPeersChanged; smaller tests are in TestPeerChangeDiff
func TestPatchifyPeersChanged(t *testing.T) {
hi := (&tailcfg.Hostinfo{}).View()