提交保存镜像命令java
docker commit <container> [repo:tag]
当咱们在制做本身的镜像的时候，会在container中安装一些工具、修改配置，若是不作commit保存 起来，那么container中止之后再启动，这些更改就消失了python
一.经过命令来建立镜像
这种作法的优势： 最方便 最快速web
缺点： 不规范 没法自动化docker
手动构建一个 myjava3的镜像 过程以下：ubuntu
[root@docker ~]# docker create --name myjava3 -it java /bin/bash 0814ffc5a92b66d017a620648205b1031b810ec1cb9da2ca411571dd75f4daac [root@docker ~]# docker start myjava3 myjava3 [root@docker ~]# docker ps CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES 0814ffc5a92b java "/bin/bash" 20 seconds ago Up 6 seconds myjava3
[root@docker ~]# docker exec -it 0814ffc5a92b /bin/bash
root@0814ffc5a92b:/# vim
root@0814ffc5a92b:/# ls
bin dev home lib64 mnt proc run srv tmp var
boot etc lib media opt root sbin sys usrtomcat
root@0814ffc5a92b:/# mkdir createimagebash
#退出容器 提交保存镜像服务器
root@0814ffc5a92b:/# exit
exitoracle
[root@docker ~]# docker commit 0814ffc5a92b myjava3:v1.0
sha256:c7644e42d29b5938518e624ce8c1033ff8973d1b73501de7cc288c0f4dabbb76
[root@docker ~]# docker images
REPOSITORY TAG IMAGE ID CREATED SIZE
myjava3 v1.0 c7644e42d29b 16 seconds ago 643MB
[root@docker ~]# docker run -it myjava3:v1.0 ls
bin createimage etc lib media opt root sbin sys usr
boot dev home lib64 mnt proc run srv tmp var
二.Buildfile自动化建立镜像
1.一个ubuntu下的Java镜像的buildfile
FROM nimmis/ubuntu:14.04 MAINTAINER nimmis <kjell.havneskold@gmail.com> # disable interactive functions ENV DEBIAN_FRONTEND noninteractive # set default java environment variable ENV JAVA_HOME /usr/lib/jvm/java-8-openjdk-amd64 RUN apt-get install -y software-properties-common && \ add-apt-repository ppa:openjdk-r/ppa -y && \ apt-get update && \ apt-get install -y --no-install-recommends openjdk-8-jre && \ rm -rf /var/lib/apt/lists/*
执行Dockerfile
[root@docker ~]# docker build -t benjamin/java .
2.Dockfile 复杂案例实战：制做ubuntu+java+tomcat+ssh server镜像
mkdir test cd test vi Dockfile FROM ubuntu MAINTAINER yongboy "yongboy@gmail.com" # 更新源，安装ssh server RUN echo "deb http://archive.ubuntu.com/ubuntu precise main universe"> /etc/apt/sources.list RUN apt-get update RUN apt-get install -y openssh-server RUN mkdir -p /var/run/sshd # 设置root ssh远程登陆密码为123456 RUN echo "root:123456" | chpasswd # 添加orache java7源，一次性安装vim，wget，curl，java7，tomcat7等必备软件 RUN apt-get install python-software-properties RUN add-apt-repository ppa:webupd8team/java RUN apt-get update RUN apt-get install -y vim wget curl oracle-java7-installer tomcat7 # 设置JAVA_HOME环境变量 RUN update-alternatives --display java RUN echo "JAVA_HOME=/usr/lib/jvm/java-7-oracle">> /etc/environment RUN echo "JAVA_HOME=/usr/lib/jvm/java-7-oracle">> /etc/default/tomcat7 # 容器须要开放SSH 22端口 EXPOSE 22 # 容器须要开放Tomcat 8080端口 EXPOSE 8080 # 设置Tomcat7初始化运行，SSH终端服务器做为后台运行 ENTRYPOINT service tomcat7 start && /usr/sbin/sshd -D