Dockerfile构建与运行容器

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Dockerfile构建与运行容器

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Dockerfile是构建Docker镜像的文本文件，包含一系列指令用于设置应用环境。它指定基础镜像（如ubuntu或node）、安装软件、复制文件、设置环境变量等。此外，Dockerfile支持多种指令如ADD、ARG、CMD、COPY、ENTRYPOINT、ENV、EXPOSE、FROM、HEALTHCHECK、LABEL、MAINTAINER、ONBUILD、RUN、SHELL、STOPSIGNAL、USER、VOLUME、WORKDIR，用于详细定义镜像构建过程。示例中展示了使用nginx官方镜像构建的基本Dockerfile，包括复制配置文件、静态网站文件，并暴露80端口。

💻 Dockerfile是构建Docker镜像的文本文件，包含一系列指令用于设置应用环境，相当于一个详细的环境搭建菜谱。

📦 基础镜像（Base Image）是镜像构建的起点，通常选择现有镜像如ubuntu或node作为基础，为应用提供初始环境。

📋 Dockerfile支持多种指令，如COPY用于复制文件，RUN用于执行命令安装软件，ENV用于设置环境变量，EXPOSE用于暴露应用监听的端口等，实现镜像的完整配置。

🚀 示例中展示了使用nginx官方镜像构建的基本Dockerfile，通过FROM指定基础镜像，COPY复制配置文件和静态网站文件，EXPOSE暴露80端口，使nginx容器能够正常运行并提供服务。

A dockerfile can be used to build an image and then run as a container on docker terms or as a pod in Kubernetes.

A Dockerfile is a text file that contains a series of instructions on how to build a Docker image. It’s like a recipe that tells Docker how to set up an environment for your application. Here’s a breakdown of what it typically includes:

Base Image

ubuntu

node

Commands

Entry Point

# Arguments supported in a Dockerfile

The Dockerfile supports the following instructions:

Instruction	Description
`ADD`	Add local or remote files and directories.
`ARG`	Use build-time variables.
`CMD`	Specify default commands.
`COPY`	Copy files and directories.
`ENTRYPOINT`	Specify default executable.
`ENV`	Set environment variables.
`EXPOSE`	Describe which ports your application is listening on.
`FROM`	Create a new build stage from a base image.
`HEALTHCHECK`	Check a container’s health on startup.
`LABEL`	Add metadata to an image.
`MAINTAINER`	Specify the author of an image.
`ONBUILD`	Specify instructions for when the image is used in a build.
`RUN`	Execute build commands.
`SHELL`	Set the default shell of an image.
`STOPSIGNAL`	Specify the system call signal for exiting a container.
`USER`	Set user and group ID.
`VOLUME`	Create volume mounts.
`WORKDIR`	Change working directory.

More on the Docker Docs on Dockerfile reference.

# Simple Example with nginx

Example with nginx.

 1 2 3 4 5 6 7 8 91011# Use the official NGINX image from Docker HubFROM nginx:latest# Copy your custom NGINX configuration file (if you have one)# COPY nginx.conf /etc/nginx/nginx.conf# Copy static website files to the appropriate directory# COPY . /usr/share/nginx/html# Expose the port NGINX listens onEXPOSE 80

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Created 2024-08-08

# Arguments supported in a Dockerfile

# Simple Example with nginx

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