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ipn/ipnlocal, tstest/integration: add panic to catch flaky test in the act

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Updates #11962

Change-Id: Ifa24b82f9c76639bfd83278a7c2fe9cf42897bbb
Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
This commit is contained in:
Brad Fitzpatrick 2024-05-05 17:41:13 -07:00 committed by Brad Fitzpatrick
parent 258b5042fe
commit 7e0dd61e61
2 changed files with 24 additions and 3 deletions
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9
ipn/ipnlocal/local.go
View File

@ -4278,6 +4278,15 @@ func (b *LocalBackend) enterStateLockedOnEntry(newState ipn.State, unlock unlock
oldState := b.state
b.state = newState
prefs := b.pm.CurrentPrefs()
// Some temporary (2024-05-05) debugging code to help us catch
// https://github.com/tailscale/tailscale/issues/11962 in the act.
if prefs.WantRunning() &&
prefs.ControlURLOrDefault() == ipn.DefaultControlURL &&
envknob.Bool("TS_PANIC_IF_HIT_MAIN_CONTROL") {
panic("[unexpected] use of main control server in integration test")
}
netMap := b.netMap
activeLogin := b.activeLogin
authURL := b.authURL

18
tstest/integration/integration_test.go
View File

@ -363,11 +363,17 @@ func TestTwoNodes(t *testing.T) {
t.Logf("node2 SOCKS5 addr: %v", n2Socks)
n1.AwaitListening()
t.Logf("n1 is listening")
n2.AwaitListening()
t.Logf("n2 is listening")
n1.MustUp()
t.Logf("n1 is up")
n2.MustUp()
t.Logf("n2 is up")
n1.AwaitRunning()
t.Logf("n1 is running")
n2.AwaitRunning()
t.Logf("n2 is running")
if err := tstest.WaitFor(2*time.Second, func() error {
st := n1.MustStatus()
@ -1072,11 +1078,16 @@ func newTestNode(t *testing.T, env *testEnv) *testNode {
// Look for a data race. Once we see the start marker, start logging the rest.
var sawRace bool
var sawPanic bool
n.addLogLineHook(func(line []byte) {
if mem.Contains(mem.B(line), mem.S("WARNING: DATA RACE")) {
lineB := mem.B(line)
if mem.Contains(lineB, mem.S("WARNING: DATA RACE")) {
sawRace = true
}
if sawRace {
if mem.HasPrefix(lineB, mem.S("panic: ")) {
sawPanic = true
}
if sawRace || sawPanic {
t.Logf("%s", line)
}
})
@ -1250,6 +1261,7 @@ func (n *testNode) StartDaemonAsIPNGOOS(ipnGOOS string) *Daemon {
"TS_LOGS_DIR="+t.TempDir(),
"TS_NETCHECK_GENERATE_204_URL="+n.env.ControlServer.URL+"/generate_204",
"TS_ASSUME_NETWORK_UP_FOR_TEST=1", // don't pause control client in airplane mode (no wifi, etc)
"TS_PANIC_IF_HIT_MAIN_CONTROL=1",
)
if version.IsRace() {
cmd.Env = append(cmd.Env, "GORACE=halt_on_error=1")
@ -1479,7 +1491,7 @@ func (tt *trafficTrap) Err() error {
func (tt *trafficTrap) ServeHTTP(w http.ResponseWriter, r *http.Request) {
var got bytes.Buffer
r.Write(&got)
err := fmt.Errorf("unexpected HTTP proxy via proxy: %s", got.Bytes())
err := fmt.Errorf("unexpected HTTP request via proxy: %s", got.Bytes())
mainError.Store(err)
if tt.Err() == nil {
// Best effort at remembering the first request.