func DNSResolveCheck(host string, timeout time.Duration) Check {
	resolver := net.Resolver{}
	return func() error {
		ctx, cancel := context.WithTimeout(context.Background(), timeout)
		defer cancel()
		addrs, err := resolver.LookupHost(ctx, host)
		if err != nil {
			return err
		}
		if len(addrs) < 1 {
			return fmt.Errorf("could not resolve host")
		}
		return nil
	}
}
func DNSResolveCheck(host string, timeout time.Duration) Check {
	resolver := net.Resolver{}
	return func() error {
		ctx, cancel := context.WithTimeout(context.Background(), timeout)
		defer cancel()
		addrs, err := resolver.LookupHost(ctx, host)
		if err != nil {
			return err
		}
		if len(addrs) < 1 {
			return fmt.Errorf("could not resolve host")
		}
		return nil
	}
}
func DNSResolveCheck ( host string , timeout time . Duration ) Check { resolver := net . Resolver { } return func ( ) error { ctx , cancel := context . WithTimeout ( context . Background ( ) , timeout ) defer cancel ( ) addrs , err := resolver . LookupHost ( ctx , host ) if err != nil { return err } if len ( addrs ) < 1 { return fmt . Errorf ( " " ) } return nil } }
// DNSResolveCheck returns a Check that makes sure the provided host can resolve
// to at least one IP address within the specified timeout.
DNSResolveCheck returns a Check that makes sure the provided host can resolve to at least one IP address within the specified timeout .