雲端運算 / Docker
Docker 是一個開源的容器化平台,旨在幫助開發者更有效率地打包、部署和執行應用程式。通過 Docker,開發者可以將應用程式及其相關的依賴項,如程式庫、框架和其他工具,打包成一個輕量級的可移植容器,並在任何支援 Docker 的環境中運行。
Docker 的核心概念是容器,容器是一個獨立且輕量的運行環境,它包含了應用程式的所有必要元件,如程式碼、執行環境、系統工具、系統庫等。相比傳統的虛擬機器,容器更加輕量,啟動速度更快,並且具有更高的性能。
Docker 提供了一個簡單而強大的命令行工具,開發者可以通過這些工具創建、管理和運行容器。使用 Dockerfile,開發者可以定義應用程式的打包配置,包括基礎映像、依賴項和運行指令,並通過 Docker CLI 構建和執行這些容器。
Docker 的另一個重要功能是 Docker Compose,它是一個用於定義和管理多個容器的工具,開發者可以通過一個簡單的 YAML 文件來定義多個容器的配置,並使用一個命令來啟動、停止和管理這些容器。
除了開發和部署應用程式之外,Docker 還可以幫助開發者快速構建測試環境、持續集成和持續部署流水線,並支援在不同環境之間輕鬆地移植和部署應用程式。
總的來說,Docker 是一個強大的容器化平台,能夠幫助開發者更加輕鬆地打包、部署和執行應用程式,並提高開發效率和部署靈活性。
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