docker笔记之dockerfile

from --构建的新镜像是基于哪个镜像的

Build镜像命令

[root@ct7-mb ~]# docker build --help

 Usage: docker build [OPTIONS] PATH | URL | -

 Build an image from a Dockerfile

 [OPTIONS] 
 -t  --tag list  #镜像名称
 -f  --file string  # 指定Dockerfile文件位置

示例：

docker build .  #默认找当前目录以Dockerfile命名的文件

dockerfile构建PHP网站环境镜像

[root@ct7-mb ~]# cat Dockerfile 
 FROM centos:6
 MAINTAINER jinc
 RUN yum install -y httpd php php-gd php-mysql mysql mysql-server
 ENV MYSQL_ROOT_PASSWORD 123456
 RUN echo "<?php phpinfo()?>" > /var/www/html/index.php

 ADD start.sh /start.sh
 RUN chmod +x /start.sh

 ADD http://cn.wordpress.org/wordpress-4.7.4-zh_CN.tar.gz /var/www/html
 #COPY wp-config.php /var/www/html/wordpress

 VOLUME ["/var/lib/mysql"]

 CMD /start.sh

 EXPOSE 80 3306

创建镜像

[root@ct7-mb ~]# docker build -t wordpress:v1 .
 Sending build context to Docker daemon  4.437MB
 Step 1/11 : FROM centos:6
 。。。
 Step 11/11 : EXPOSE 80 3306
  ---> Running in a5eb6330210b
 Removing intermediate container a5eb6330210b
  ---> 67605dda8a82
 Successfully built 67605dda8a82
 Successfully tagged wordpress:v1

查看

[root@ct7-mb ~]# docker images
 REPOSITORY                TAG                 IMAGE ID            CREATED             SIZE
 wordpress                 v1                  67605dda8a82        2 minutes ago       386MB

使用

[root@ct7-mb ~]# docker run -itd --name wordpress -p 88:80 wordpress:v1
 e25d20fcd627e1193003b7bcce6cfbf3cdae631b02b34024d09cab18054c3b9b

 [root@ct7-mb ~]# docker ps
 CONTAINER ID        IMAGE               COMMAND                  CREATED             STATUS              PORTS                          NAMES
 f922463ea5db        wordpress:v1        "/bin/sh -c /start.sh"   4 seconds ago       Up 3 seconds        3306/tcp, 0.0.0.0:88->80/tcp   wordpress

 通过浏览器访问
 http://10.0.0.205:88/  出现phpinfo 界面

 后面就又是WordPress安装过程了。。就不再说了