[系统运维]Docker Dockerfile基本指令，构建Centos，tomcat，发布镜像到dockerhub/aliyun

dockerfile脚本

FROM centos
VOLLUM ["volume01"]
CMD echo "---end---"
CMD /bin/bash

docker build -f dockerfile -t khm/centos .

DockerFile指令

FROM         #基础镜像
MAINTAINER   #镜像谁写的
RUN          #镜像构建的运行命令
ADD          #步骤，tomcat
WORKDIR      #镜像工作目录
VLUME        #挂载目录
EXPOSE       #暴露端口
CMD          #指定这个容器运行命令
ENTRYPOINT   #指定这个容器运行命令，可以追加命令
ONBUILD      #当构建被继承DockerFile就会运行ONBUILD
COPY         #类似add，将文件拷贝到镜像中
ENV          #构建环境的时候设置环境变量

构建自己的centos

mkdir dockerfile

vim mydocker

FROM centos
MAINTAINER khm<khmerl@163.com>
ENV MYPATH /usr/local
WORKDIR $MYPATH
RUN yum -y install vim
RUN yum -y install net-tools
EXPOSE 80
CMD echo $MYPATH
CMD /bin/bash

docker build -f mydocker -t mycentos:1.0 .

docker images

docker run -it mycentos:1.0

构建tomcat镜像

vim Dockerfile

FROM centos
MAINTAINER khm<khmerl@163.com>
COPY readme.txt /usr/local/readme.txt
ADD jdk-8u... /usr/local/
ADD tomcat... /usr/local/
RUN yum -y install vim
EVN MYPATH /usr/local
WORKDIR $MYPATH
EVN JAVA_HOME /usr/local/jdk1.8.0_11
EVN CLASSPATH $JAVA_HOME/lib/dt.jar;$JAVA_HOME/lib/tools.jar
EVN CATALINA_HOME /usr/local/apache-tomcat-9.0.22
EVN CATALINA_BASH /usr/local/apache-tomcat-9.0.22
EVN PATH $PATH;$JAVA_HOME/bin;$CATALINA_HOME/lib;$CATALINA_HOME/bin
EXPOSE 8080
CMD /usr/local/apache-tomcat-9.0.22/bin/startup.sh && tail -F /url/local/apache-tomcat-9.0.22/bin/logs/catalina.out

docker build -t diytomcat .

docker images

docker run -d -p 9090:8080 --name diytomcat  -v /home/khm/build/tomcat/test:/usr/local/apache-tomcat-9.0.22/webapps/test -v /home/khm/build/tomcat/tomcatlogs/:/usr/local/apache-tomcat-9.0.22/logs

docker exec -it 容器id

curl localhost:9090

发布自己镜像

dockerhub

docker login -u khm 

docker tag 容器id khm/khm/名字:版本号 #tag标签

docker push khm/名字:版本号

aliyun

1.登录阿里云
2.找到容器镜像服务
3.创建命名空间
4.创建容器镜像
5.浏览阿里云