DockerFile案例

时间 2021-02-27

标签 html java linux docker shell vim centos bash oracle curl 栏目 Docker 繁體版

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DockerFile案例

案例1：自定义镜像mycentos

一、在Centos7宿主机上启用ip转发功能html

# Avoid WARNING: IPv4 forwarding is disabled. Networking will not work.
echo "net.ipv4.ip_forward=1" >> /etc/sysctl.conf
systemctl restart network

二、编写DockerFile文件：vim Dockerfilejava

# 查询centos镜像版本：https://hub.docker.com/
FROM centos:7
# author<email>
MAINTAINER auth<auth@163.com>

ENV MYPATH /usr/local
WORKDIR $MYPATH

RUN yum -y install vim
RUN yum -y install net-tools

# 暴露端口
EXPOSE 80

CMD echo $MYPATH
CMD /bin/bash

三、构建mycentos镜像（不要忘记最后的.）linux

docker build -f Dockerfile -t mycentos:1.0 .

四、经过mycentos镜像生成容器，而且更改容器的yum源docker

# 建立并运行容器
docker run -it --name mycentos01 mycentos:1.0

# yum repo (163)
mv /etc/yum.repos.d/CentOS-Base.repo /etc/yum.repos.d/CentOS-Base.repo.backup
curl -o /etc/yum.repos.d/CentOS-Base.repo http://mirrors.163.com/.help/CentOS7-Base-163.repo
yum clean all && yum makecache

# ping test
ping www.baidu.com

案例2：带有JDK的Centos7镜像

一、下载JDK到宿主机工做目录（如jdk-8u281-linux-x64.tar.gz）shell

在linux中安装jdk的教程（若不须要在宿主机上安装jdk，能够跳过）vim
Java官方文档：https://docs.oracle.com/javase/8/docs/technotes/guides/install/install_overview.htmlcentos
1. Change directory to the location where you would like the JDK to be installed, then move the .tar.gz archive file to the current directory.bash
2. Unpack the archive file and install the JDK. ( tar zxvf jdk-8uversion-linux-x64.tar.gz )oracle
  
  tar zxvf jdk-8u281-linux-x64.tar.gzcurl
3. The JDK files are installed in a directory called jdk1.8.0_version in the current directory.
  
  jdk1.8.0_281
4. Delete the .tar.gz file if you want to save disk space.

二、编写DockerFile文件：vim Dockerfile1

FROM centos:7
MAINTAINER auth<auth@163.com>

ENV MYPATH /usr/local
WORKDIR $MYPATH

RUN yum -y install vim
RUN yum -y install net-tools

# COPY:将宿主机中指定的文件复制到docker容器中指定的路径  ADD:复制（如果压缩文件会先解压）
ADD jdk-8u281-linux-x64.tar.gz /usr/local
ENV JAVA_HOME /usr/local/jdk1.8.0_281
ENV CLASSPATH $JAVA_HOME/lib/dt.jar:$JAVA_HOME/lib/tools.jar
ENV PATH $PATH:$JAVA_HOME/bin

EXPOSE 80

CMD echo $MYPATH
CMD /bin/bash

三、构建 jdk+centos7 镜像（不要忘记最后的.）

docker build -f Dockerfile1 -t mycentos:2.0 .