基于Ubuntu 14.04构建tomcat7镜像

1、创建Dockerfile文件（如果在Windows下编辑文件，一定要将格式转化为Linux格式文件，否则将导致Linux下查看文件每行多一个^M）

# Pull base image  
FROM ubuntu:14.04  
  
MAINTAINER shencq "shencq@g-soft.com.cn"  
  
# update source  
RUN echo "deb http://archive.ubuntu.com/ubuntu trusty main universe"> /etc/apt/sources.list  
RUN apt-get update  
  
# Install curl  
RUN apt-get -y install curl  
  
# Install JDK 7  
RUN cd /tmp &&  curl -L 'http://download.oracle.com/otn-pub/java/jdk/7u65-b17/jdk-7u65-linux-x64.tar.gz' -H 'Cookie: oraclelicense=accept-securebackup-cookie; gpw_e24=Dockerfile' | tar -xz  
RUN mkdir -p /usr/lib/jvm  
RUN mv /tmp/jdk1.7.0_65/ /usr/lib/jvm/java-7-oracle/  
  
# Set Oracle JDK 7 as default Java  
RUN update-alternatives --install /usr/bin/java java /usr/lib/jvm/java-7-oracle/bin/java 300     
RUN update-alternatives --install /usr/bin/javac javac /usr/lib/jvm/java-7-oracle/bin/javac 300     
  
ENV JAVA_HOME /usr/lib/jvm/java-7-oracle/  
  
# Install tomcat7  
RUN cd /tmp && curl -L 'http://archive.apache.org/dist/tomcat/tomcat-7/v7.0.8/bin/apache-tomcat-7.0.8.tar.gz' | tar -xz  
RUN mv /tmp/apache-tomcat-7.0.8/ /opt/tomcat7/  
  
ENV CATALINA_HOME /opt/tomcat7  
ENV PATH $PATH:$CATALINA_HOME/bin  
  
ADD tomcat7.sh /etc/init.d/tomcat7  
RUN chmod 755 /etc/init.d/tomcat7  
  
# Expose ports.  
EXPOSE 8080  
  
# Define default command.  
ENTRYPOINT service tomcat7 start && tail -f /opt/tomcat7/logs/catalina.out 

2、创建tomcat7.sh文件

export JAVA_HOME=/usr/lib/jvm/java-7-oracle/
export JAVA_OPTS="-Dfile.encoding=UTF-8 
-Dcatalina.logbase=/var/log/tomcatProd 
-Dnet.sf.ehcache.skipUpdateCheck=true 
-XX:+UseConcMarkSweepGC 
-XX:+CMSClassUnloadingEnabled 
-XX:+UseParNewGC 
-XX:MaxPermSize=128m 
-Xms512m -Xmx512m"
export PATH=$JAVA_HOME/bin:$PATH
TOMCAT_HOME=/opt/tomcat7
SHUTDOWN_WAIT=20
export CATALINA_OPTS="-Xmx512m"

export CATALINA_BASE=/opt/tomcat7

tomcat_pid() {
  echo `ps aux | grep org.apache.catalina.startup.Bootstrap | grep $CATALINA_BASE | grep -v grep | awk '{ print $2 }'`
}
start() {
  pid=$(tomcat_pid)
  if [ -n "$pid" ]
  then
echo "Tomcat is already running (pid: $pid)"
  else
    # Start tomcat
    echo "Starting tomcat"
    #ulimit -n 100000
    umask 007
    $TOMCAT_HOME/bin/startup.sh
  fi
return 0
}

stop() {
  pid=$(tomcat_pid)
  if [ -n "$pid" ]
  then
echo "Stoping Tomcat"
    if [ "$USER" == "$TOMCAT_USER" ]
    then
         $TOMCAT_HOME/bin/shutdown.sh
    else
        /bin/su -p -s /bin/sh $TOMCAT_USER $TOMCAT_HOME/bin/shutdown.sh
    fi

    let kwait=$SHUTDOWN_WAIT
    count=0;
    until [ `ps -p $pid | grep -c $pid` = '0' ] || [ $count -gt $kwait ]
    do
echo -n -e "
waiting for processes to exit";
      sleep 1
      let count=$count+1;
    done

if [ $count -gt $kwait ]; then
echo -n -e "
killing processes which didn't stop after $SHUTDOWN_WAIT seconds"
      kill -9 $pid
    fi
else
echo "Tomcat is not running"
  fi
return 0
}

case $1 in
start)
  start
;;
stop)
  stop
;;
restart)
  stop
  start
;;
status)
  pid=$(tomcat_pid)
  if [ -n "$pid" ]
  then
echo "Tomcat is running with pid: $pid"
  else
echo "Tomcat is not running"
  fi
;;
esac
exit 0

3、构建镜像

docker build -t shencq/tomcat7 . 

4、运行镜像

docker run -d -p 8090:8080 shencq/tomcat7

5、访问tomcat

　　默认情况下，tomcat会占用8080端口，刚才在启动container的时候，指定了 -p 8090:8080，映射到宿主机端口就是8090。

http://<host>:8090 #host为主机IP