- github.com/daviddengcn/go-colortext: [511bcaf → v1.0.0](https://github.com/daviddengcn/go-colortext/compare/511bcaf...v1.0.0)
- github.com/docker/docker: [v20.10.12+incompatible → v20.10.17+incompatible](https://github.com/docker/docker/compare/v20.10.12...v20.10.17)
- github.com/envoyproxy/go-control-plane: [63b5d3c → 49ff273](https://github.com/envoyproxy/go-control-plane/compare/63b5d3c...49ff273)

	wl := NewLRWMutex()
	var rl sync.Locker
	wlocked := make(chan bool, 1)
	rlocked := make(chan bool, 1)
	rl = wl.DRLocker()
	n := 10
	go func() {
		for range n {
			rl.Lock()
			rl.Lock()
			rlocked <- true
			wl.Lock()
			wlocked <- true
		}
	}()
	for range n {
		<-rlocked
		rl.Unlock()
		select {
		case <-wlocked:
			t.Fatal("RLocker() didn't read-lock it")
		default:
		}

Vous pouvez en lire davantage dans la [documentation Docker sur les formes shell et exec](https://docs.docker.com/reference/dockerfile/#shell-and-exec-form).

	}
	return lockCopy
}

func (l *localLocker) Close() error {
	return nil
}

// IsOnline - local locker is always online.
func (l *localLocker) IsOnline() bool {
	return true
}

// IsLocal - local locker returns true.
func (l *localLocker) IsLocal() bool {
	return true
}

	"github.com/minio/minio/internal/logger"
	"github.com/minio/minio/internal/lsync"
)

// local lock servers
var globalLockServer *localLocker

// RWLocker - locker interface to introduce GetRLock, RUnlock.
type RWLocker interface {
	GetLock(ctx context.Context, timeout *dynamicTimeout) (lkCtx LockContext, timedOutErr error)
	Unlock(lkCtx LockContext)

Подробнее об этом читайте в [документации Docker о shell- и exec-формах](https://docs.docker.com/reference/dockerfile/#shell-and-exec-form).

Это особенно заметно при использовании `docker compose`. См. раздел FAQ Docker Compose с техническими подробностями: [Почему мои сервисы пересоздаются или останавливаются 10 секунд?](https://docs.docker.com/compose/faq/#why-do-my-services-take-10-seconds-to-recreate-or-stop).

Puedes leer más sobre esto en la [documentación de Docker para formas de shell y exec](https://docs.docker.com/reference/dockerfile/#shell-and-exec-form).

Und es gibt viele andere Images für verschiedene Dinge wie Datenbanken, zum Beispiel für:

* [PostgreSQL](https://hub.docker.com/_/postgres)
* [MySQL](https://hub.docker.com/_/mysql)
* [MongoDB](https://hub.docker.com/_/mongo)
* [Redis](https://hub.docker.com/_/redis), usw.

You can read more about it in the [Docker docs for shell and exec form](https://docs.docker.com/reference/dockerfile/#shell-and-exec-form).

This can be quite noticeable when using `docker compose`. See this Docker Compose FAQ section for more technical details: [Why do my services take 10 seconds to recreate or stop?](https://docs.docker.com/compose/faq/#why-do-my-services-take-10-seconds-to-recreate-or-stop).

## 容器镜像 { #container-images }

Docker 一直是创建和管理**容器镜像**与**容器**的主要工具之一。

还有一个公共的 [Docker Hub](https://hub.docker.com/)，其中为许多工具、环境、数据库和应用提供了预制的**官方容器镜像**。

例如，有官方的 [Python 镜像](https://hub.docker.com/_/python)。

还有许多用于不同目的（如数据库）的镜像，例如：

* [PostgreSQL](https://hub.docker.com/_/postgres)
* [MySQL](https://hub.docker.com/_/mysql)
* [MongoDB](https://hub.docker.com/_/mongo)
* [Redis](https://hub.docker.com/_/redis) 等。