To build a container image using the Dockerfile example from theprevious section, you use thedocker buildcommand: $docker build -t test:latest . The-t test:latestoption specifies the name and tag of the image. The single dot (.) at the end of the command sets thebuild contextto the cu...
Example Here's what a typical workflow for building applications with Docker looks like. The following example code shows a small "Hello World" application written in Python, using the Flask framework. from flask import Flask app = Flask(__name__) @app.route("/") def hello(): return "He...
Some of the essential directives are: FROM - it defines the base image to start building from; RUN - which executes commands that are a part of the image build process, for example, software installation; COPY - to copy files or directories from your local machine to the image; EXPOSE -...
LABEL"com.example.vendor"="ACME Incorporated' LABEL com .example.labe1-with-value="foo" LABEL version="1.0" LABEL description="This text illustrates that Tabe7-values can span multiple lines." 一个镜像还可以有多个label,还可以写在一行中,即多标签写法,可以减少镜像的大小 范例:多标签写法 #一行格...
# Usage example with CMD: # Arguments set with CMD can be overridden during *run* CMD "Hello docker!" ENTRYPOINT echo 1. 2. 3. 4. 5. 6. 7. 8. ENV ENV命令用于设置环境变量。这些变量以”key=value”的形式存在,并可以在容器内被脚本或者程序调用。这个机制给在容器中运行应用带来了极大的便利...
For example: RUN [ "echo", "$HOME" ]will not do variable substitution on $HOME. If you want shell processing then either use the shellform or execute a shell directly, for example: RUN [ "sh", "-c", "echo $HOME" ]. In the JSON form, it is necessary to escape backslashes. ...
#将 archive.tar.gz 解压缩到镜像的 /app 目录 ADD archive.tar.gz /app/ # 从 URL 下载文件并放在镜像的 /app 目录 ADD https://example.com/file.txt /app/ 1. 2. 3. 4. 2.7.1. 选项说明 下面是可选的OPTIONS --keep-git-dir --checksum --chown --chmod --link --exclude 1. 2. 3....
ENV PG_MAJOR9.3ENV PG_VERSION9.3.4RUNcurl -SL http://example.com/postgres-$PG_VERSION.tar.xz | tar -xJC /usr/src/postgress && ...ENV PATH /usr/local/postgres-$PG_MAJOR/bin:$PATH ADD 格式为ADD <src> <dest>。 该命令将复制指定的到容器中的。其中可以是Dockerfile所在目录的一个相对路...
LABEL com.example.label-with-value="foo" LABEL version="1.0" LABEL description="This text illustrates \ that label-values can span multiple lines." USER 设置用户名(或UID)和可选设置用户组(或GID),用于运行镜像及RUN、CMD、ENTRYPOINT命令。
This is similar to using the --name option with the docker run command. Before launch Specify a list of tasks to perform before starting the run configuration. For example, run another configuration, build the necessary artifacts, run some external tool or a web browser, and so on. Click ...