阿里云安装docker

netstat -lnt   网络端口
free -m 查看内存使用情况

cat /etc/redhat-release   查看centos版本，只支持7以后的版本
yum install docker   安装docker

useradd docker -d /home/docker -s /bin/bash   -d指定目录
echo "docker:docker" | chpasswd   设置密码为docker
cat /etc/passwd 查看用户

cat >/data/dockerfiles/scripts/devops.sh<<EOF
#!/bin/bash
# this script function is :                
# deploy new docker container             
#                                          
# USER        YYYY-MM-DD - ACTION          
# junsansi    2016-01-25 - CREATED        
parasnum=5
# function
help_msg()
{
cat << help
+ Error Cause:
+ you enter $# parameters
+ the total paramenter number must be $parasnum
+ 1st :DOCKER_NAME
+ 2nd :PROJECT_NAME
+ 3rd :PROJECT_VERSION
+ 4th :SOURCE_PORT
+ 5th :DESTINATION_PORT
help
}
# Check parameter number
if [ $# -ne ${parasnum} ]
then
        help_msg 
        exit
fi
# Initialize the parameter.
DOCKER_NAME=$1
PROJECT_NAME=$2
PROJ_VERSION=$3
SPORT=$4
DPORT=$5
PROJ_VERSION=${PROJ_VERSION/"origin/"/""}
DOCKER_FILE="/data/dockerfiles/${DOCKER_NAME}/Dockerfile"
DOCKER_FILE_DIR=/data/dockerfiles/${DOCKER_NAME}
if [ ! -d ${DOCKER_FILE_DIR} ]; then
        mkdir -p ${DOCKER_FILE_DIR}
fi
# check docker images
DOCKER_IMAGE=`/usr/bin/docker images | grep ${DOCKER_NAME} | awk -F ‘ ‘ ‘{print $3}‘`
if [ -n "${DOCKER_IMAGE}" ]; then
        # check docker container
        for dc in `/usr/bin/docker ps -a | grep ${DOCKER_NAME} | awk -F " " ‘{print $1}‘`
        do
                echo "Stop container: ${dc}"
                /usr/bin/docker stop ${dc}
                # delete while docker container was exists
                echo "##Delete exists Container_Id: "${dc}
                /usr/bin/docker rm ${dc}
        done

        # delete while docker image was exists
        echo "#Delete exists Image: "${DOCKER_IMAGE}
        /usr/bin/docker rmi ${DOCKER_IMAGE} 
fi
# Init dockerfile
echo "**Init dockerfile start: "${DOCKER_FILE}
echo "FROM tomcat" > ${DOCKER_FILE}
echo ‘MAINTAINER junsansi "junsansi@sina.com"‘ >> ${DOCKER_FILE}
echo "ADD *.war /usr/local/tomcat/webapps/${PROJECT_NAME}.war" >> ${DOCKER_FILE}
echo "EXPOSE 8080" >> ${DOCKER_FILE}
echo "CMD /usr/local/tomcat/bin/startup.sh && tail -f /usr/local/tomcat/logs/catalina.out" >> ${DOCKER_FILE}
cat ${DOCKER_FILE}
echo "**Init dockerfile end."
# Build dockerfile
cd ${DOCKER_FILE_DIR}
rm *.war -rf
mv /data/dockerfiles/war/${DOCKER_NAME}/*.war ./
echo ""
echo "##Build dockerfile for "${DOCKER_NAME}
/usr/bin/docker build -t ${DOCKER_NAME}:${PROJ_VERSION} . 
# Run docker container
echo ""
echo "##Running docker container: "${DOCKER_NAME}
/usr/bin/docker run --name ${DOCKER_NAME}_d1 -d -p ${SPORT}:${DPORT} ${DOCKER_NAME}:${PROJ_VERSION}
EOF
chmod +x  /data/dockerfiles/scripts/devops.sh
chown docker.docker /data/dockerfiles -R

 chmod +x /data/dockerfiles/scripts/deploy.sh    执行权限
chown docker:docker /data/dockerfiles/ -R   将属主变为用户docker

 service docker start 
  
 docker images   查看docker已经创建的镜像

 docker ps -a 打印所有的容器

docker search tomcat    查找镜像
docker pull tomcat  安装tomcat