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wgengine/wgcfg/nmcfg: coalesce, limit some debug logs

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Updates #14881

Change-Id: I708d29244fe901ab037203a5d7c2cae3c77e4c78
Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
This commit is contained in:
Brad Fitzpatrick 2025-02-03 09:59:07 -08:00 committed by Brad Fitzpatrick
parent 10fe10ea10
commit 95e2353294
1 changed files with 14 additions and 6 deletions
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20
wgengine/wgcfg/nmcfg/nmcfg.go
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@ -81,8 +81,8 @@ func WGCfg(nm *netmap.NetworkMap, logf logger.Logf, flags netmap.WGConfigFlags,
// Logging buffers
skippedUnselected := new(bytes.Buffer)
skippedIPs := new(bytes.Buffer)
skippedSubnets := new(bytes.Buffer)
skippedExpired := new(bytes.Buffer)
for _, peer := range nm.Peers {
if peer.DiscoKey().IsZero() && peer.HomeDERP() == 0 && !peer.IsWireGuardOnly() {
@ -95,7 +95,16 @@ func WGCfg(nm *netmap.NetworkMap, logf logger.Logf, flags netmap.WGConfigFlags,
// anyway, since control intentionally breaks node keys for
// expired peers so that we can't discover endpoints via DERP.
if peer.Expired() {
logf("[v1] wgcfg: skipped expired peer %s", peer.Key().ShortString())
if skippedExpired.Len() >= 1<<10 {
if !bytes.HasSuffix(skippedExpired.Bytes(), []byte("...")) {
skippedExpired.WriteString("...")
}
} else {
if skippedExpired.Len() > 0 {
skippedExpired.WriteString(", ")
}
fmt.Fprintf(skippedExpired, "%s/%v", peer.StableID(), peer.Key().ShortString())
}
continue
}
@ -137,12 +146,11 @@ func WGCfg(nm *netmap.NetworkMap, logf logger.Logf, flags netmap.WGConfigFlags,
if skippedUnselected.Len() > 0 {
logf("[v1] wgcfg: skipped unselected default routes from: %s", skippedUnselected.Bytes())
}
if skippedIPs.Len() > 0 {
logf("[v1] wgcfg: skipped node IPs: %s", skippedIPs)
}
if skippedSubnets.Len() > 0 {
logf("[v1] wgcfg: did not accept subnet routes: %s", skippedSubnets)
}
if skippedExpired.Len() > 0 {
logf("[v1] wgcfg: skipped expired peer: %s", skippedExpired)
}
return cfg, nil
}