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tsnet: split user facing and backend logging

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This adds a new `UserLogf` field to the `Server` struct.
When set this any logs generated by Server are logged using
`UserLogf` and all spammy backend logs are logged to `Logf`.

If it `UserLogf` is unset, we default to `log.Printf` and
if `Logf` is unset we discard all the spammy logs.

Fixes #12094

Signed-off-by: Maisem Ali <maisem@tailscale.com>
This commit is contained in:
Maisem Ali 2024-05-10 13:12:11 -07:00 committed by Maisem Ali
parent 7209c4f91e
commit 486a423716
7 changed files with 50 additions and 50 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

3
cmd/pgproxy/pgproxy.go
View File

@ -28,7 +28,6 @@
"tailscale.com/metrics"
"tailscale.com/tsnet"
"tailscale.com/tsweb"
"tailscale.com/types/logger"
)
var (
@ -58,8 +57,6 @@ func main() {
ts := &tsnet.Server{
Dir: *tailscaleDir,
Hostname: *hostname,
// Make the stdout logs a clean audit log of connections.
Logf: logger.Discard,
}
if os.Getenv("TS_AUTHKEY") == "" {

5
cmd/sniproxy/sniproxy_test.go
View File

@ -8,6 +8,7 @@
"encoding/json"
"flag"
"fmt"
"log"
"net"
"net/http/httptest"
"net/netip"
@ -99,8 +100,8 @@ func startNode(t *testing.T, ctx context.Context, controlURL, hostname string) (
Store: new(mem.Store),
Ephemeral: true,
}
if !*verboseNodes {
s.Logf = logger.Discard
if *verboseNodes {
s.Logf = log.Printf
}
t.Cleanup(func() { s.Close() })

5
cmd/tsidp/tsidp.go
View File

@ -40,7 +40,6 @@
"tailscale.com/tsnet"
"tailscale.com/types/key"
"tailscale.com/types/lazy"
"tailscale.com/types/logger"
"tailscale.com/types/views"
"tailscale.com/util/mak"
"tailscale.com/util/must"
@ -95,8 +94,8 @@ func main() {
ts := &tsnet.Server{
Hostname: "idp",
}
if !*flagVerbose {
ts.Logf = logger.Discard
if *flagVerbose {
ts.Logf = log.Printf
}
st, err = ts.Up(ctx)
if err != nil {

2
tsnet/example/tsnet-funnel/tsnet-funnel.go
View File

@ -16,14 +16,12 @@
"net/http"
"tailscale.com/tsnet"
"tailscale.com/types/logger"
)
func main() {
flag.Parse()
s := &tsnet.Server{
Dir: "./funnel-demo-config",
Logf: logger.Discard,
Hostname: "fun",
}
defer s.Close()

10
tsnet/example_tsnet_test.go
View File

@ -89,15 +89,6 @@ func ExampleServer_multipleInstances() {
}()
}
// ExampleServer_ignoreLogs shows you how to ignore all of the log messages written
// by a tsnet instance.
func ExampleServer_ignoreLogs() {
srv := &tsnet.Server{
Logf: func(string, ...any) {},
}
_ = srv
}
// ExampleServer_ignoreLogsSometimes shows you how to ignore all of the log messages
// written by a tsnet instance, but allows you to opt-into them if a command-line
// flag is set.
@ -107,7 +98,6 @@ func ExampleServer_ignoreLogsSometimes() {
srv := &tsnet.Server{
Hostname: *hostname,
Logf: func(string, ...any) {},
}
if *tsnetVerbose {

70
tsnet/tsnet.go
View File

@ -89,8 +89,14 @@ type Server struct {
// If empty, the binary name is used.
Hostname string
// Logf, if non-nil, specifies the logger to use. By default,
// log.Printf is used.
// UserLogf, if non-nil, specifies the logger to use for logs generated by
// the Server itself intended to be seen by the user such as the AuthURL for
// login and status updates. If unset, log.Printf is used.
UserLogf logger.Logf
// Logf, if set is used for logs generated by the backend such as the
// LocalBackend and MagicSock. It is verbose and intended for debugging.
// If unset, logs are discarded.
Logf logger.Logf
// Ephemeral, if true, specifies that the instance should register
@ -244,15 +250,15 @@ func (s *Server) Loopback() (addr string, proxyCred, localAPICred string, err er
s.logf("localapi tcp serve error: %v", err)
}
}()
s5l := logger.WithPrefix(s.logf, "socks5: ")
s5s := &socks5.Server{
Logf: logger.WithPrefix(s.logf, "socks5: "),
Logf: s5l,
Dialer: s.dialer.UserDial,
Username: "tsnet",
Password: s.proxyCred,
}
go func() {
s.logf("SOCKS5 server exited: %v", s5s.Serve(socksLn))
s5l("SOCKS5 server exited: %v", s5s.Serve(socksLn))
}()
}
@ -484,14 +490,12 @@ func (s *Server) start() (reterr error) {
}
}
logf := s.logf
if s.rootPath == "" {
confDir, err := os.UserConfigDir()
if err != nil {
return err
}
s.rootPath, err = getTSNetDir(logf, confDir, prog)
s.rootPath, err = getTSNetDir(s.logf, confDir, prog)
if err != nil {
return err
}
@ -505,19 +509,29 @@ func (s *Server) start() (reterr error) {
return fmt.Errorf("%v is not a directory", s.rootPath)
}
tsLogf := func(format string, a ...any) {
if s.logtail != nil {
s.logtail.Logf(format, a...)
}
if s.Logf == nil {
return
}
s.Logf(format, a...)
}
sys := new(tsd.System)
if err := s.startLogger(&closePool, sys.HealthTracker()); err != nil {
if err := s.startLogger(&closePool, sys.HealthTracker(), tsLogf); err != nil {
return err
}
s.netMon, err = netmon.New(logf)
s.netMon, err = netmon.New(tsLogf)
if err != nil {
return err
}
closePool.add(s.netMon)
s.dialer = &tsdial.Dialer{Logf: logf} // mutated below (before used)
eng, err := wgengine.NewUserspaceEngine(logf, wgengine.Config{
s.dialer = &tsdial.Dialer{Logf: tsLogf} // mutated below (before used)
eng, err := wgengine.NewUserspaceEngine(tsLogf, wgengine.Config{
ListenPort: s.Port,
NetMon: s.netMon,
Dialer: s.dialer,
@ -532,7 +546,7 @@ func (s *Server) start() (reterr error) {
sys.Set(eng)
// TODO(oxtoacart): do we need to support Taildrive on tsnet, and if so, how?
ns, err := netstack.Create(logf, sys.Tun.Get(), eng, sys.MagicSock.Get(), s.dialer, sys.DNSManager.Get(), sys.ProxyMapper(), nil)
ns, err := netstack.Create(tsLogf, sys.Tun.Get(), eng, sys.MagicSock.Get(), s.dialer, sys.DNSManager.Get(), sys.ProxyMapper(), nil)
if err != nil {
return fmt.Errorf("netstack.Create: %w", err)
}
@ -559,8 +573,8 @@ func (s *Server) start() (reterr error) {
if s.Store == nil {
stateFile := filepath.Join(s.rootPath, "tailscaled.state")
logf("tsnet running state path %s", stateFile)
s.Store, err = store.New(logf, stateFile)
s.logf("tsnet running state path %s", stateFile)
s.Store, err = store.New(tsLogf, stateFile)
if err != nil {
return err
}
@ -571,13 +585,13 @@ func (s *Server) start() (reterr error) {
if s.Ephemeral {
loginFlags = controlclient.LoginEphemeral
}
lb, err := ipnlocal.NewLocalBackend(logf, s.logid, sys, loginFlags|controlclient.LocalBackendStartKeyOSNeutral)
lb, err := ipnlocal.NewLocalBackend(tsLogf, s.logid, sys, loginFlags|controlclient.LocalBackendStartKeyOSNeutral)
if err != nil {
return fmt.Errorf("NewLocalBackend: %v", err)
}
lb.SetTCPHandlerForFunnelFlow(s.getTCPHandlerForFunnelFlow)
lb.SetVarRoot(s.rootPath)
logf("tsnet starting with hostname %q, varRoot %q", s.hostname, s.rootPath)
s.logf("tsnet starting with hostname %q, varRoot %q", s.hostname, s.rootPath)
s.lb = lb
if err := ns.Start(lb); err != nil {
return fmt.Errorf("failed to start netstack: %w", err)
@ -598,17 +612,17 @@ func (s *Server) start() (reterr error) {
}
st := lb.State()
if st == ipn.NeedsLogin || envknob.Bool("TSNET_FORCE_LOGIN") {
logf("LocalBackend state is %v; running StartLoginInteractive...", st)
s.logf("LocalBackend state is %v; running StartLoginInteractive...", st)
if err := s.lb.StartLoginInteractive(s.shutdownCtx); err != nil {
return fmt.Errorf("StartLoginInteractive: %w", err)
}
} else if authKey != "" {
logf("Authkey is set; but state is %v. Ignoring authkey. Re-run with TSNET_FORCE_LOGIN=1 to force use of authkey.", st)
s.logf("Authkey is set; but state is %v. Ignoring authkey. Re-run with TSNET_FORCE_LOGIN=1 to force use of authkey.", st)
}
go s.printAuthURLLoop()
// Run the localapi handler, to allow fetching LetsEncrypt certs.
lah := localapi.NewHandler(lb, logf, s.logid)
lah := localapi.NewHandler(lb, tsLogf, s.logid)
lah.PermitWrite = true
lah.PermitRead = true
@ -621,14 +635,14 @@ func (s *Server) start() (reterr error) {
s.lb.ConfigureWebClient(s.localClient)
go func() {
if err := s.localAPIServer.Serve(lal); err != nil {
logf("localapi serve error: %v", err)
s.logf("localapi serve error: %v", err)
}
}()
closePool.add(s.localAPIListener)
return nil
}
func (s *Server) startLogger(closePool *closeOnErrorPool, health *health.Tracker) error {
func (s *Server) startLogger(closePool *closeOnErrorPool, health *health.Tracker, tsLogf logger.Logf) error {
if testenv.InTest() {
return nil
}
@ -659,10 +673,10 @@ func (s *Server) startLogger(closePool *closeOnErrorPool, health *health.Tracker
Stderr: io.Discard, // log everything to Buffer
Buffer: s.logbuffer,
CompressLogs: true,
HTTPC: &http.Client{Transport: logpolicy.NewLogtailTransport(logtail.DefaultHost, s.netMon, health, s.logf)},
HTTPC: &http.Client{Transport: logpolicy.NewLogtailTransport(logtail.DefaultHost, s.netMon, health, tsLogf)},
MetricsDelta: clientmetric.EncodeLogTailMetricsDelta,
}
s.logtail = logtail.NewLogger(c, s.logf)
s.logtail = logtail.NewLogger(c, tsLogf)
closePool.addFunc(func() { s.logtail.Shutdown(context.Background()) })
return nil
}
@ -683,8 +697,8 @@ func (s *Server) logf(format string, a ...any) {
if s.logtail != nil {
s.logtail.Logf(format, a...)
}
if s.Logf != nil {
s.Logf(format, a...)
if s.UserLogf != nil {
s.UserLogf(format, a...)
return
}
log.Printf(format, a...)
@ -697,8 +711,8 @@ func (s *Server) printAuthURLLoop() {
if s.shutdownCtx.Err() != nil {
return
}
if st := s.lb.State(); st != ipn.NeedsLogin {
s.logf("printAuthURLLoop: state is %v; stopping", st)
if st := s.lb.State(); st != ipn.NeedsLogin && st != ipn.NoState {
s.logf("AuthLoop: state is %v; done", st)
return
}
st := s.lb.StatusWithoutPeers()

5
tsnet/tsnet_test.go
View File

@ -16,6 +16,7 @@
"flag"
"fmt"
"io"
"log"
"math/big"
"net"
"net/http"
@ -214,8 +215,8 @@ func startServer(t *testing.T, ctx context.Context, controlURL, hostname string)
Ephemeral: true,
getCertForTesting: testCertRoot.getCert,
}
if !*verboseNodes {
s.Logf = logger.Discard
if *verboseNodes {
s.Logf = log.Printf
}
t.Cleanup(func() { s.Close() })