Docker 安装创建
Docker安装要求需要64位操作系统
至少要RHEL6.5以上版本
关闭Firewall
创建Docker的yum源
docker-engine-1.12.1-1.el7.centos.x86_64.rpm
docker-engine-selinux-1.12.1-1.el7.centos.noarch.rpm
createrepo .
vi gzqstca.repo
name=docker
baseurl=ftp://...***
enabled=1
gpgcheck=0
yum search docker
yum -y install docker-engine
systemctl enable docker
systemctl start docker
采用后端存储 cow copy of write
ifconfig 查看
docker images 查看当前机器有的镜像
Docker hub 镜像仓库
http://hub.docker.com
Docker官方提供公共镜像的仓库（Registry）
docker search rhel7
docker search centos
docker search nginx
docker search mysql
docker pull 下载
docker push 上传
docker search busybox
docker pull busybox
例：
docdocker help push
导入镜像
docker load < ***.tar
docker imagers
导出镜像
docker images
docker save image_name > ***.tar
docker save busybox（名称）:***(唯一的tag name) > busybox.tar
scp busybox.tar docker2:./
docker2 ~]# docker load < busybox.tar
lftp 192.168.1.254
ls
cd public/
get docker_images.zip
bye
unzip docker_images.zip
cd docker_images
for i in *
do
docker load < $i
done
启动镜像
启动centos镜像生成一个容器
docker images
docker run -it centos bash
开启另一个终端（查看容器信息）
docker ps
创建启动窗口的命令
docker run -it 镜像的名称：镜像的标签 [启动命令]
latest是默认标签
docker run -it centos:latest cmd
等同docker run -it centos cmd
查看详细信息
docker inspect 镜像的名称：镜像的标签
cat >/etc/yum.repos.d/centos.repo/etc/yum.repos.d/centos.repo /var/www/html/index.html
cat /etc/sysconfig/httpd
/usr/sbin/httpd $OPTIONS -DFOREGROUND
/usr/sbin/httpd -DFOREGROUND
history
exit
vim Dockerfile
FROM mycentos:latest
RUN yum -y install httpd
ENV EnvironmentFile=/etc/sysconfig/httpd
WORKDIR /var/www/html
RUN echo "Hello world">index.html
EXPOSE 80
CMD ["/usr/sbin/httpd", "-DFOREGROUND"]
docker build -t mycentos:httpd .
docker run -d -p 8888:22 mycentos:httpd
例：在sshd的镜像上填加httpd
vim Dockerfiles
FROM mycentos:sshd
RUN yum -y install httpd
ENV EnvironmentFile=/etc/sysconfig/httpd
WORKDIR /var/www/html
RUN echo "Hello world!">index.html
EXPOSE 22
EXPOSE 80
ADD run.sh /etc/init.d/run.sh
CMD ["/etc/init.d/run.sh"]
vim run.sh
#!/bin/bash
/usr/sbin/sshd -D &
/usr/sbin/httpd -DFOREGROUND
chmod +x run.sh
docker build -t mycentos:sshdhttpd .
docker run -d -p 8888:80 -p 1022:22 mycentos:sshdhttpd
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