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tsnet: add Server.AuthKey field

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... so callers can provide the AuthKey via mechanisms other than
environment variables which means multiple Servers can't be started
concurrently in the same process without coordination.

Change-Id: I7736ef4f59b7cc29637939e140e990613ce58e0d
Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
This commit is contained in:
Brad Fitzpatrick 2022-06-27 21:23:48 -07:00 committed by Brad Fitzpatrick
parent bef6e2831a
commit 3ac8ab1791
1 changed files with 16 additions and 2 deletions
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18
tsnet/tsnet.go
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@ -74,6 +74,13 @@ type Server struct {
// as an Ephemeral node (https://tailscale.com/kb/1111/ephemeral-nodes/).
Ephemeral bool
// AuthKey, if non-empty, is the auth key to create the node
// and will be preferred over the TS_AUTHKEY environment
// variable. If the node is already created (from state
// previously stored in in Store), then this field is not
// used.
AuthKey string
initOnce sync.Once
initErr error
lb *ipnlocal.LocalBackend
@ -151,6 +158,13 @@ func (s *Server) doInit() {
}
}
func (s *Server) getAuthKey() string {
if v := s.AuthKey; v != "" {
return v
}
return os.Getenv("TS_AUTHKEY")
}
func (s *Server) start() error {
exe, err := os.Executable()
if err != nil {
@ -292,7 +306,7 @@ func (s *Server) start() error {
prefs := ipn.NewPrefs()
prefs.Hostname = s.hostname
prefs.WantRunning = true
authKey := os.Getenv("TS_AUTHKEY")
authKey := s.getAuthKey()
err = lb.Start(ipn.Options{
StateKey: ipn.GlobalDaemonStateKey,
UpdatePrefs: prefs,
@ -306,7 +320,7 @@ func (s *Server) start() error {
logf("LocalBackend state is %v; running StartLoginInteractive...", st)
s.lb.StartLoginInteractive()
} else if authKey != "" {
logf("TS_AUTHKEY is set; but state is %v. Ignoring authkey. Re-run with TSNET_FORCE_LOGIN=1 to force use of authkey.", st)
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()