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health: don't report a warning in DERP homeless mode

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Updates #3363
Updates tailscale/corp#396

Change-Id: Ibfb0496821cb58a78399feb88d4206d81e95ca0f
Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
This commit is contained in:
Brad Fitzpatrick 2023-11-16 13:43:36 -08:00 committed by Brad Fitzpatrick
parent cca27ef96a
commit 4d196c12d9
2 changed files with 20 additions and 12 deletions
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27
health/health.go
View File

@ -37,6 +37,7 @@
lastMapPollEndedAt time.Time
lastStreamedMapResponse time.Time
derpHomeRegion int
derpHomeless bool
derpRegionConnected = map[int]bool{}
derpRegionHealthProblem = map[int]string{}
derpRegionLastFrame = map[int]time.Time{}
@ -315,10 +316,14 @@ func GetInPollNetMap() bool {
}
// SetMagicSockDERPHome notes what magicsock's view of its home DERP is.
func SetMagicSockDERPHome(region int) {
//
// The homeless parameter is whether magicsock is running in DERP-disconnected
// mode, without discovering and maintaining a connection to its home DERP.
func SetMagicSockDERPHome(region int, homeless bool) {
mu.Lock()
defer mu.Unlock()
derpHomeRegion = region
derpHomeless = homeless
selfCheckLocked()
}
@ -447,15 +452,17 @@ func overallErrorLocked() error {
if d := now.Sub(lastStreamedMapResponse).Round(time.Second); d > tooIdle {
return fmt.Errorf("no map response in %v", d)
}
rid := derpHomeRegion
if rid == 0 {
return errors.New("no DERP home")
}
if !derpRegionConnected[rid] {
return fmt.Errorf("not connected to home DERP region %v", rid)
}
if d := now.Sub(derpRegionLastFrame[rid]).Round(time.Second); d > tooIdle {
return fmt.Errorf("haven't heard from home DERP region %v in %v", rid, d)
if !derpHomeless {
rid := derpHomeRegion
if rid == 0 {
return errors.New("no DERP home")
}
if !derpRegionConnected[rid] {
return fmt.Errorf("not connected to home DERP region %v", rid)
}
if d := now.Sub(derpRegionLastFrame[rid]).Round(time.Second); d > tooIdle {
return fmt.Errorf("haven't heard from home DERP region %v in %v", rid, d)
}
}
if udp4Unbound {
return errors.New("no udp4 bind")

5
wgengine/magicsock/derp.go
View File

@ -141,11 +141,12 @@ func (c *Conn) setNearestDERP(derpNum int) (wantDERP bool) {
defer c.mu.Unlock()
if !c.wantDerpLocked() {
c.myDerp = 0
health.SetMagicSockDERPHome(0)
health.SetMagicSockDERPHome(0, c.homeless)
return false
}
if c.homeless {
c.myDerp = 0
health.SetMagicSockDERPHome(0, c.homeless)
return false
}
if derpNum == c.myDerp {
@ -156,7 +157,7 @@ func (c *Conn) setNearestDERP(derpNum int) (wantDERP bool) {
metricDERPHomeChange.Add(1)
}
c.myDerp = derpNum
health.SetMagicSockDERPHome(derpNum)
health.SetMagicSockDERPHome(derpNum, c.homeless)
if c.privateKey.IsZero() {
// No private key yet, so DERP connections won't come up anyway.