Function initPrewarm

controller/prewarm.go:36–44

initPrewarm 会为规则中的每个目标开启后台保温。

(rule *config.Rule)

// tracks the small, bounded number of concurrent dials.
type prewarmPool struct {
	manager *prewarmManager
	addr    string
	desired int

	ctx    context.Context
	cancel context.CancelFunc
	wake   chan struct{}
	dial   func(context.Context, string) (net.Conn, error)
	wg     sync.WaitGroup

	mu        sync.Mutex
	idle      []idlePrewarmConn