Method startTailnetAPI

agent/agent.go:2471–2495

startTailnetAPI starts a routine that uses the Tailnet API. c.f. startAgentAPI which is the same but for the Agent API.

(
	name string, behavior gracefulShutdownBehavior,
	f func(context.Context, tailnetproto.DRPCTailnetClient24) error,
)

// startTailnetAPI starts a routine that uses the Tailnet API. c.f. startAgentAPI which is the same
// but for the Agent API.
func (a *apiConnRoutineManager) startTailnetAPI(
	name string, behavior gracefulShutdownBehavior,
	f func(context.Context, tailnetproto.DRPCTailnetClient24) error,
) {
	logger := a.logger.With(slog.F("name", name))
	var ctx context.Context
	switch behavior {
	case gracefulShutdownBehaviorStop:
		ctx = a.stopCtx
	case gracefulShutdownBehaviorRemain:
		ctx = a.remainCtx
	default:
		panic("unknown behavior")
	}
	a.eg.Go(func() error {
		logger.Debug(ctx, "starting tailnet routine")
		err := f(ctx, a.tAPI)
		err = shouldPropagateError(ctx, logger, err)
		logger.Debug(ctx, "routine exited", slog.Error(err))
		if err != nil {
			return xerrors.Errorf("error in routine %s: %w", name, err)
		}
		return nil
	})
}

// shouldPropagateError decides whether an error from an API connection routine should be propagated to the
// apiConnRoutineManager. Its purpose is to prevent errors related to shutting down from propagating to the manager's