最近一直在做docker的安装打包工作，学到不少东西，在博客里记一下。
环境centos6 ，docker 基础镜象centos6
1、创建本地基础镜象，安装基础命令包
（1）Dockerfile，Dockerfile用来创建一个自定义的image，包含用户指定的软件依赖。使用build命令来创建新的images。
Dockerfile内容：
FROM centos:centos6 ADD CentOS-Base.repo /etc/yum.repos.d/CentOS-Base.repo
RUN yum clean all && \
yum -y install vim \
tar \
gcc-c++ \
openssh-server \
openssh-clients \
tcpdump \
passwd \
screen \
telnet \
sudo \
vixie-cron \
pcre-devel \
gd-devel \
curl-devel \
ncurses-devel \
bison \
gcc \
mysql \
openssl-devel \
openssl \
python-dateutil \
svn
FROM centos:centos6，是指定基础镜象
ADD 是把当前文件夹下面的CentOS-Base.repo映射 到容器里面的/etc/yum.repos.d/CentOS-Base.repo
RUN 指定容器启动后要执行的命令。
（2）执行build.sh脚本
docker build -t=video-base:cloud-v4 .
创建仓库为video-base，tag为cloud-v4的本地镜象。
2、执行install，把工程拷到docker里面
（1）Dockerfile内容
FROM video-base:cloud-v4 ADD
system_install /opt/system_install
ENTRYPOINT cd /opt/system_install && sh ./install_all.sh && sh ./install_setup.s
a.从第一步生成的video-base:cloud-v4生成新镜象
b.把当前文件夹下的system_install映射成容器里面的 /opt/system_install
c.执行install_all.sh
PWD_DIR=$(cd "$(dirname "$0")"; pwd)
echo "current dir path:"$PWD_DIR
cd $PWD_DIR chmod -R 755 . mkdir -p /opt/srv echo "step 1: java"
sh ./java_install.sh echo "step 2: nginx"
sh ./nginx_install.sh echo "step 3: resin "
sh resin_install.sh echo "step 4: server"
sh server_install.sh echo "step 5: av_convert"
sh av_convert_install.sh echo "step 6: monitor"
sh ./monitor_install.sh
cp monitor.conf /opt/service_check/monitor.conf echo "all installed."
d.java install.sh内容
echo "java install"
rpm -ivh /opt/src/jdk-7u65-linux-x64.rpm echo 'export JAVA_HOME=/usr/java/jdk1.7.0_65' >> /etc/profile
echo 'export PATH=$PATH:$JAVA_HOME/bin' >> /etc/profile
echo 'export CLASSPATH=.:$JAVA_HOME/jre/lib:$JAVA_HOME/lib:$JAVA_HOME/lib/tools.jar' >> /etc/profile source /etc/profile mv /usr/bin/java{,.bak}
ln -s -f $JAVA_HOME/jre/bin/java /usr/bin/java
e.av_convert install.sh
#!/bin/sh
PWD_DIR=$(cd "$(dirname "$0")"; pwd) #NAME="resin-4.0.37"
#FROM=$NAME".tar.gz" if [ $# == 0 ]; then
SRC_PATH=/opt/src (此处是映射自docker外的/opt/src_3.4)
elif [ $# == 1 ]; then
SRC_PATH=$1
else
echo "error parameter"
exit
fi
echo "source path:"$SRC_PATH mkdir -p /opt/srv
cd /opt/srv cp -rpf $SRC_PATH/av_convert ./
e.执行build.sh，生成video-install-s1:$TAG .的镜象
PWD_DIR=$(cd "$(dirname "$0")"; pwd)
cd $PWD_DIR
. ../../config/env.conf
TAG=$image_tag
docker build -t=video-install-s1:$TAG .
f.执行run.sh启动s1的容器，如果有变动，就生成s2的镜象
PWD_DIR=$(cd "$(dirname "$0")"; pwd)
cd $PWD_DIR
. ../../config/env.conf
TAG=$image_tag
docker run -ti \
-v /opt/src_3.4:/opt/src \
video-install-s1:$TAG CID=$(docker ps -a | grep video-install-s1:$TAG | awk '{print $1}'|head -n 1)
docker commit ${CID} video-install-s2:$TAG if [ "$1" = "Y" ]; then
echo "export"
IMAGE_PATH=~/image_3.4_tmp
mkdir -p $IMAGE_PATH
docker export ${CID} | gzip -c > $IMAGE_PATH/video-install-s2.tar.gz
fi
其中
docker run -ti \
-v /opt/src_3.4:/opt/src \
video-install-s1:$TAG这句话是把docker外面的/opt/src_3.4映射为内部的/opt/src
CID=$(docker ps -a | grep video-install-s1:$TAG | awk '{print $1}'|head -n 1)是获取s1版本容器的id
docker commit ${CID} video-install-s2:$TAG是把上一步获取的id提交成创库为video-all tag为s2的镜象
3、保存镜象
(1)Dockerfile
FROM video-install-s2:pangu-20150612094957
MAINTAINER Cao Song <caosong1@lenovo.com> ADD file /opt/file
ENV SHELL /bin/bash
ENTRYPOINT ["/opt/file/startup.sh"]
CMD []
（2）build.sh
PWD_DIR=$(cd "$(dirname "$0")"; pwd)
cd $PWD_DIR
ROOT=$(cd $PWD_DIR; cd ../..; pwd)
. ../../config/env.conf
. $ROOT/lib/constant.sh
TAG=$image_tag
sed -i "s/FROM.*video-install.*$/FROM video-install-s2:$TAG/g" Dockerfile
chmod +x $PWD_DIR/file/startup.sh
docker build -t=${REGISTRY_PREFIX}video-all:$TAG . if [ "$1" = "Y" ]; then
echo "save docker images"
IMAGE_PATH=~/image_3.4_tmp
mkdir -p $IMAGE_PATH
time docker save ${REGISTRY_PREFIX}video-all:$TAG | gzip -9 -c > $IMAGE_PATH/video-all.tar.gz
fi
docker save > video-all.tar.gz
生成docker镜象完成。要注意av_convert工程是如何安装的。