1. Dockerfile those basics

Each instruction must be reserved words in capital letters and followed by at least one parameter to follow
Instruction is executed in top-down order
#It indicates a comment
Each command will create a new image layer, and mirror commit

2. Docker perform substantially the flow of Dockerfile

docker run from a container base image
Execute an instruction and container make changes
Docker commit operation is performed similar to submit a new image layer
docker again based mirroring run just submitted a new container
Dockerfile execution of the next instruction until all instructions execute complete

3. DockerFile Architecture (reserved word instruction)

FROM: base image, a new image is based on which the current mirror
MAINTAINER: Mirror defenders name and e-mail address
RUN: Run command is required when building container
EXPOSE: Foreign exposed current container port
WORKDIR: After you create a designated container terminal default landing came in the working directory, a foothold
ENV: used to construct the mirrors during set environment variables (ENV MY_PATH / usr / mytest)
ADD: the host file in the directory image and copied into the ADD command processing URL and automatically extract the tar archive
COPY: Similar ADD, copy files and directories to the mirror. Building context file directory from <source path> / directory to <destination path> location (COPY src dest) within the new mirror layer (COPY [ "src", "dest"])
VOLUME: container volume data, for data storage and persistence work
CMD: Specifies the command to start a container to run. There can be multiple CMD command, but only the last one will work, CMD parameter will be replaced after the docker run
ENTRYPOINT: Specifies the command to start a container to run, ENTRYPOINT purpose and CMD, are in the specified container and start the program parameters
ONBUILD: Run command when building an inherited Dockerfile, the father of the mirror is triggered after the quilt in his father's image of onbuild

Example 4. Content

FROM         centos
MAINTAINER    zzyy<zzyybs@126.com>
#把宿主机当前上下文的c.txt拷贝到容器/usr/local/路径下
COPY c.txt /usr/local/cincontainer.txt #把java与tomcat添加到容器中 ADD jdk-8u171-linux-x64.tar.gz /usr/local/ ADD apache-tomcat-9.0.8.tar.gz /usr/local/ #安装vim编辑器 RUN yum -y install vim #设置工作访问时候的WORKDIR路径，登录落脚点 ENV MYPATH /usr/local WORKDIR $MYPATH #配置java与tomcat环境变量 ENV JAVA_HOME /usr/local/jdk1.8.0_171 ENV CLASSPATH $JAVA_HOME/lib/dt.jar:$JAVA_HOME/lib/tools.jar ENV CATALINA_HOME /usr/local/apache-tomcat-9.0.8 ENV CATALINA_BASE /usr/local/apache-tomcat-9.0.8 ENV PATH $PATH:$JAVA_HOME/bin:$CATALINA_HOME/lib:$CATALINA_HOME/bin #容器运行时监听的端口 EXPOSE 8080 #启动时运行tomcat # ENTRYPOINT ["/usr/local/apache-tomcat-9.0.8/bin/startup.sh" ] # CMD ["/usr/local/apache-tomcat-9.0.8/bin/catalina.sh","run"] CMD /usr/local/apache-tomcat-9.0.8/bin/startup.sh && tail -F /usr/local/apache-tomcat-9.0.8/bin/logs/catalina.out

1. Dockerfile those basics

Each instruction must be reserved words in capital letters and followed by at least one parameter to follow
Instruction is executed in top-down order
#It indicates a comment
Each command will create a new image layer, and mirror commit

2. Docker perform substantially the flow of Dockerfile

docker run from a container base image
Execute an instruction and container make changes
Docker commit operation is performed similar to submit a new image layer
docker again based mirroring run just submitted a new container
Dockerfile execution of the next instruction until all instructions execute complete

3. DockerFile Architecture (reserved word instruction)

FROM: base image, a new image is based on which the current mirror
MAINTAINER: Mirror defenders name and e-mail address
RUN: Run command is required when building container
EXPOSE: Foreign exposed current container port
WORKDIR: After you create a designated container terminal default landing came in the working directory, a foothold
ENV: used to construct the mirrors during set environment variables (ENV MY_PATH / usr / mytest)
ADD: the host file in the directory image and copied into the ADD command processing URL and automatically extract the tar archive
COPY: Similar ADD, copy files and directories to the mirror. Building context file directory from <source path> / directory to <destination path> location (COPY src dest) within the new mirror layer (COPY [ "src", "dest"])
VOLUME: container volume data, for data storage and persistence work
CMD: Specifies the command to start a container to run. There can be multiple CMD command, but only the last one will work, CMD parameter will be replaced after the docker run
ENTRYPOINT: Specifies the command to start a container to run, ENTRYPOINT purpose and CMD, are in the specified container and start the program parameters
ONBUILD: Run command when building an inherited Dockerfile, the father of the mirror is triggered after the quilt in his father's image of onbuild

Example 4. Content

FROM         centos
MAINTAINER    zzyy<zzyybs@126.com>
#把宿主机当前上下文的c.txt拷贝到容器/usr/local/路径下
COPY c.txt /usr/local/cincontainer.txt #把java与tomcat添加到容器中 ADD jdk-8u171-linux-x64.tar.gz /usr/local/ ADD apache-tomcat-9.0.8.tar.gz /usr/local/ #安装vim编辑器 RUN yum -y install vim #设置工作访问时候的WORKDIR路径，登录落脚点 ENV MYPATH /usr/local WORKDIR $MYPATH #配置java与tomcat环境变量 ENV JAVA_HOME /usr/local/jdk1.8.0_171 ENV CLASSPATH $JAVA_HOME/lib/dt.jar:$JAVA_HOME/lib/tools.jar ENV CATALINA_HOME /usr/local/apache-tomcat-9.0.8 ENV CATALINA_BASE /usr/local/apache-tomcat-9.0.8 ENV PATH $PATH:$JAVA_HOME/bin:$CATALINA_HOME/lib:$CATALINA_HOME/bin #容器运行时监听的端口 EXPOSE 8080 #启动时运行tomcat # ENTRYPOINT ["/usr/local/apache-tomcat-9.0.8/bin/startup.sh" ] # CMD ["/usr/local/apache-tomcat-9.0.8/bin/catalina.sh","run"] CMD /usr/local/apache-tomcat-9.0.8/bin/startup.sh && tail -F /usr/local/apache-tomcat-9.0.8/bin/logs/catalina.out

Dockfile file parsing

1. Dockerfile those basics

2. Docker perform substantially the flow of Dockerfile

3. DockerFile Architecture (reserved word instruction)

Example 4. Content

1. Dockerfile those basics

2. Docker perform substantially the flow of Dockerfile

3. DockerFile Architecture (reserved word instruction)

Example 4. Content

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