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cmd/tailscale,ipn/ipnlocal: print debug component names

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Make the 'tailscale debug component-logs' command print the component names for
which extra logging can be turned on, for easier discoverability of debug
functions.

Updates #cleanup

Co-authored-by: Paul Scott <paul@tailscale.com>
Signed-off-by: Val <valerie@tailscale.com>
This commit is contained in:
Val 2023-10-03 12:31:56 +02:00 committed by valscale
parent 5efd5e093e
commit 73e53dcd1c
3 changed files with 14 additions and 11 deletions
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9
cmd/tailscale/cli/debug.go
View File

@ -63,9 +63,10 @@
ShortHelp: "print DERP map", ShortHelp: "print DERP map",
}, },
{ {
Name: "component-logs", Name: "component-logs",
Exec: runDebugComponentLogs, Exec: runDebugComponentLogs,
ShortHelp: "enable/disable debug logs for a component", ShortHelp: "enable/disable debug logs for a component",
ShortUsage: "tailscale debug component-logs [" + strings.Join(ipn.DebuggableComponents, "|") + "]",
FlagSet: (func() *flag.FlagSet { FlagSet: (func() *flag.FlagSet {
fs := newFlagSet("component-logs") fs := newFlagSet("component-logs")
fs.DurationVar(&debugComponentLogsArgs.forDur, "for", time.Hour, "how long to enable debug logs for; zero or negative means to disable") fs.DurationVar(&debugComponentLogsArgs.forDur, "for", time.Hour, "how long to enable debug logs for; zero or negative means to disable")
@ -724,7 +725,7 @@ func runTS2021(ctx context.Context, args []string) error {
func runDebugComponentLogs(ctx context.Context, args []string) error { func runDebugComponentLogs(ctx context.Context, args []string) error {
if len(args) != 1 { if len(args) != 1 {
return errors.New("usage: debug component-logs <component>") return errors.New("usage: debug component-logs [" + strings.Join(ipn.DebuggableComponents, "|") + "]")
} }
component := args[0] component := args[0]
dur := debugComponentLogsArgs.forDur dur := debugComponentLogsArgs.forDur

7
ipn/backend.go
View File

@ -192,6 +192,13 @@ type PartialFile struct {
// - "_debug_<component>_until" with value being a unix timestamp stringified // - "_debug_<component>_until" with value being a unix timestamp stringified
type StateKey string type StateKey string
// DebuggableComponents is a list of components whose debugging can be turned on
// and off individually using the tailscale debug command.
var DebuggableComponents = []string{
"magicsock",
"sockstats",
}
type Options struct { type Options struct {
// FrontendLogID is the public logtail id used by the frontend. // FrontendLogID is the public logtail id used by the frontend.
FrontendLogID string FrontendLogID string

9
ipn/ipnlocal/local.go
View File

@ -386,7 +386,7 @@ func NewLocalBackend(logf logger.Logf, logID logid.PublicID, sys *tsd.System, lo
b.logf("[unexpected] failed to wire up PeerAPI port for engine %T", e) b.logf("[unexpected] failed to wire up PeerAPI port for engine %T", e)
} }
for _, component := range debuggableComponents { for _, component := range ipn.DebuggableComponents {
key := componentStateKey(component) key := componentStateKey(component)
if ut, err := ipn.ReadStoreInt(pm.Store(), key); err == nil { if ut, err := ipn.ReadStoreInt(pm.Store(), key); err == nil {
if until := time.Unix(ut, 0); until.After(b.clock.Now()) { if until := time.Unix(ut, 0); until.After(b.clock.Now()) {
@ -404,11 +404,6 @@ type componentLogState struct {
timer tstime.TimerController // if non-nil, the AfterFunc to disable it timer tstime.TimerController // if non-nil, the AfterFunc to disable it
} }
var debuggableComponents = []string{
"magicsock",
"sockstats",
}
func componentStateKey(component string) ipn.StateKey { func componentStateKey(component string) ipn.StateKey {
return ipn.StateKey("_debug_" + component + "_until") return ipn.StateKey("_debug_" + component + "_until")
} }
@ -440,7 +435,7 @@ func (b *LocalBackend) SetComponentDebugLogging(component string, until time.Tim
} }
} }
} }
if setEnabled == nil || !slices.Contains(debuggableComponents, component) { if setEnabled == nil || !slices.Contains(ipn.DebuggableComponents, component) {
return fmt.Errorf("unknown component %q", component) return fmt.Errorf("unknown component %q", component)
} }
timeUnixOrZero := func(t time.Time) int64 { timeUnixOrZero := func(t time.Time) int64 {