Linux Shell脚本之远程自动化部署java maven项目-阿里云开发者社区

脚本功能：

检查运行环境（包括运行权限、网络、DNS解析等），自动从git上获取java maven项目工程源码，在机器A上build，build完成后，备份机器B上原有的配置文件（如果存在），将Class、Lib文件和备份的配置文件等上传到机器B，重新启动机器B上的服务以便变更生效。

脚本特点：

1.（与之前的自动部署脚本相比）全新优化了脚本代码，更friendly，结构更紧凑、逻辑更加严谨

2.Public header删除了无用或者不好用的有色彩显示函数，并修正了WORKDIR不是绝对路径可能导致的bug

3.修正了域名解析判断是否正常的一个bug，该bug可能导致遇到无法解析后不断尝试解析

4.全新的通用main函数，自带文件锁和自动接受处理INT、TERM、EXIT进程信号，整个脚本更加的模块化和标准化

5.针对项目方面，增加了对java项目配置文件的备份和还原功能，增加了对docker容器的支持

使用办法：

将脚本上传到Linux任意目录，至少修改三个变量（分别是项目源码的git地址、部署对象的IP、部署对象的目标目录）：

project_clone="ssh://git@xxx/xxx.git"

deploy_target_host_ip="xxx.xxx.xxx.xxx"

project_top_directory_to_target_host="/path/to/deploy/project"

如果此项目依赖于其他项目，则修改“project_clone_depends_1”变量，如果要想使部署后自动生效，则，可以将启动脚本放在项目git源码下的bin目录下，默认名称为“startup.sh”

如果此项目部署在目标主机的docker容器内，则修改“docker_container_name”变量，以便重启容器生效。

多个容器启动的依赖关系的处理已经在TODO计划中。

首次执行需要将配置文件准确的写入项目文件中，一次写入后期无须修改，如需修改，直接修改部署对象主机上的配置文件即可。

在任意位置使用下方命令运行即可，脚本一旦运行一次，自动添加可执行权限，无须手动添加。

bash /path/to/this.sh

可以从GitHub上获取最新脚本内容：https://github.com/DingGuodong/AutomaticDeployJavaMavenProject

脚本内容：

#!/bin/bash
 
# Name: doDeploy.sh
#Execute this shell script to deploy Java projects built by Maven automatically on remote hosts.
 
# debug option
#_XTRACE_FUNCTIONS=$(set +o | grep xtrace)
#set -o xtrace
 
# define user friendly messages
header="
Function: Execute this shell script to deploy Java projects built by Maven automatically on remote hosts.

License: Open source software
"
 
# define variables
# Where to get source code

project_clone_depends_1=""

project_clone="ssh://git@xxx/xxx.git"

deploy_target_host_ip="xxx.xxx.xxx.xxx"

project_top_directory_to_target_host="/path/to/deploy/project"

docker_container_name=""
# Setting how many days do you want save old releases, default is 10 days
save_old_releases_for_days=10
# end define variables
 
# pretreatment

test -z ${project_clone_depends_1} || project_clone_target_depends_1="`echo ${project_clone_depends_1} | awk -F '[/.]+' '{ print $(NF-1)}'`"

project_clone_target="`echo ${project_clone} | awk -F '[/.]+' '{ print $(NF-1)}'`"
project_clone_repository_name=${project_clone_target}
 
# end pretreatment
 
# Public header
# =============================================================================================================================
# resolve links - $0 may be a symbolic link
# learn from apache-tomcat-6.x.xx/bin/catalina.sh

PRG="$0"
 
while [ -h "$PRG" ]; do

  ls=`ls -ld "$PRG"`

  link=`expr "$ls" : '.*-> \(.*\)$'`

  if expr "$link" : '/.*' > /dev/null; then

    PRG="$link"

  else

    PRG=`dirname "$PRG"`/"$link"

  fi
done
 
# Get standard environment variables

PRGDIR=`dirname "$PRG"`
 
# echo color function, smarter, learn from lnmp.org lnmp install.sh

function echo_r (){

    # Color red: Error, Failed

    [ $# -ne 1 ] && return 1

    echo -e "\033[31m$1\033[0m"
}

function echo_g (){

    # Color green: Success

    [ $# -ne 1 ] && return 1

    echo -e "\033[32m$1\033[0m"
}

function echo_y (){

    # Color yellow: Warning

    [ $# -ne 1 ] && return 1

    echo -e "\033[33m$1\033[0m"
}

function echo_b (){

    # Color blue: Debug, friendly prompt

    [ $# -ne 1 ] && return 1

    echo -e "\033[34m$1\033[0m"
}
# end echo color function, smarter
 
#WORKDIR="`realpath ${WORKDIR}`"

WORKDIR="`readlink -f ${PRGDIR}`"
 
# end public header
# =============================================================================================================================
 
USER="`id -un`"

LOGNAME="$USER"

if [ $UID -ne 0 ]; then

    echo "WARNING: Running as a non-root user, \"$LOGNAME\". Functionality may be unavailable. Only root can use some commands or options"
fi
 
command_exists() {

    # which "$@" >/dev/null 2>&1

    command -v "$@" >/dev/null 2>&1
}
 
check_command_can_be_execute(){

    [ $# -ne 1 ] && return 1

    command_exists $1
}
 
check_network_connectivity(){

    echo_b "checking network connectivity ... "

    network_address_to_check=8.8.4.4

    stable_network_address_to_check=114.114.114.114

    ping_count=2

    ping -c ${ping_count} ${network_address_to_check} >/dev/null

    retval=$?

    if [ ${retval} -ne 0 ] ; then

        if ping -c ${ping_count} ${stable_network_address_to_check} >/dev/null;then

            echo_g "Network to $stable_network_address_to_check succeed! "

            echo_y "Note: network to $network_address_to_check failed once! maybe just some packages loss."

        elif ! ip route | grep default >/dev/null; then

            echo_r "Network is unreachable, gateway is not set."

            exit 1

        elif ! ping -c2 $(ip route | awk '/default/ {print $3}') >/dev/null; then

            echo_r "Network is unreachable, gateway is unreachable."

            exit 1

        else

            echo_r "Network is blocked! "

            exit 1

        fi

    elif [ ${retval} -eq 0 ]; then

        echo_g "Check network connectivity passed! "

    fi
}
 
check_name_resolve(){

    echo_b "checking DNS name resolve ... "

    target_name_to_resolve="github.com"

    stable_target_name_to_resolve="www.aliyun.com"

    ping_count=1

    if ! ping  -c${ping_count} ${target_name_to_resolve} >/dev/null; then

        echo_y "Name lookup failed for $target_name_to_resolve with $ping_count times "

        if ping  -c${ping_count} ${stable_target_name_to_resolve} >/dev/null; then

            echo_g "Name lookup success for $stable_target_name_to_resolve with $ping_count times "

        fi

        eval_md5sum_of_nameserver_config="`md5sum /etc/resolv.conf | awk '{ print $1 }'`"

        if test ${eval_md5sum_of_nameserver_config} = "674ea91675cdfac353bffbf49dc593c3"; then

            echo_y "Nameserver config file is validated, but name lookup failed for $target_name_to_resolve with $ping_count times"

            return 0

        fi

        [ -f /etc/resolv.conf ] && cp /etc/resolv.conf /etc/resolv.conf_$(date +%Y%m%d%H%M%S)~

        cat >/etc/resolv.conf<<eof
nameserver 114.114.114.114
nameserver 8.8.4.4
eof

    check_name_resolve

    else

        echo_g "Check DNS name resolve passed! "

        return 0

    fi
}
 
function checkOtherDependencies() {

    echo_b "Checking other dependencies for deploy procedure... "
 
    echo_b "\tChecking user customized variables..."

    # Refer:

    # if [ -z ${var+x} ]; then

    #     echo "var is unset"; else echo "var is set to '$var'"

    # fi

    # if [ "$var x" = " x" ]; then

    #     echo "var is empty"; else echo "var is set to '$var'"

    # fi

    # if [ -z $var ]; then

    #     echo "var is empty"; else echo "var is set to '$var'"

    # fi

    if [[ -z ${project_clone} ]]; then

        echo_r "Error: project_clone is undefined! "

        exit 1

    elif [[ -z ${deploy_target_host_ip} ]]; then

        echo_r "Error: deploy_target_host_ip is undefined! "

        exit 1

    elif [[ -z ${project_top_directory_to_target_host} ]]; then

        echo_r "Error: project_top_directory_to_target_host is undefined! "

        exit 1

    fi

    echo_g "\tChecking user customized variables passed! "
 
    echo_b "\tChecking disk space available..."

    disk_space_available=`df ${WORKDIR} | tail -n1 | awk '{print $(NF-2)}'`

    if [[ ${disk_space_available} -lt 2097152 ]]; then

        echo_y "Warning: Disk space of $WORKDIR is smaller than 2GB"

        #exit 1

    else

        echo_g "\tChecking disk space available passed! "

    fi
 
    echo_g "All required dependencies check passed! "
 
}
 
function setDirectoryStructureOnLocalHost() {

    if [ -f ${WORKDIR}/.capistrano_ds_lock ];then

        echo_g "Set directory structure has been done, skipping. "

        return

    fi

    echo_b "Setting directory structure... "

    # learn from capistrano

    # Refer: http://capistranorb.com/documentation/getting-started/structure/

    # Refer: http://capistranorb.com/documentation/getting-started/structure/#
 
    # ├── current -> /var/www/my_app_name/releases/20150120114500/

    # ├── releases

    # │   ├── 20150080072500

    # │   ├── 20150090083000

    # │   ├── 20150100093500

    # │   ├── 20150110104000

    # │   └── 20150120114500

    # ├── repo

    # │   └── <VCS related data>

    # ├── revisions.log

    # └── shared

    #     └── <linked_files and linked_dirs>
 
    # current is a symlink pointing to the latest release. This symlink is updated at the end of a successful deployment. If the deployment fails in any step the current symlink still points to the old release.

    # releases holds all deployments in a timestamped folder. These folders are the target of the current symlink.

    # repo holds the version control system configured. In case of a git repository the content will be a raw git repository (e.g. objects, refs, etc.).

    # revisions.log is used to log every deploy or rollback. Each entry is timestamped and the executing user (username from local machine) is listed. Depending on your VCS data like branch names or revision numbers are listed as well.

    # shared contains the linked_files and linked_dirs which are symlinked into each release. This data persists across deployments and releases. It should be used for things like database configuration files and static and persistent user storage handed over from one release to the next.

    # The application is completely contained within the path of :deploy_to. If you plan on deploying multiple applications to the same server, simply choose a different :deploy_to path.
 
    # Check directories for deploy

    [ ! -d ${WORKDIR}/release ] && mkdir ${WORKDIR}/release

    [ ! -d ${WORKDIR}/repository ] && mkdir ${WORKDIR}/repository

    [ ! -d ${WORKDIR}/share ] && mkdir ${WORKDIR}/share

    # end directories structure
 
    # Additional directories structure for full deploy operation

    # for backup remote host config file

    [ ! -d ${WORKDIR}/backup ] && mkdir ${WORKDIR}/backup
 
    # set a directories structure lock

    touch ${WORKDIR}/.capistrano_ds_lock

    echo_g "Set directory structure successfully! "
}
 
function cleanOldReleases(){

    save_days=${save_old_releases_for_days:-10}

    if [ ! -d ${WORKDIR}/release ]; then

        echo_b "Can NOT find release directory, skipping . "

        return

    fi

    need_clean=$(find ${WORKDIR}/release -mtime +${save_days} -exec ls '{}' \;)

    if [ ! -z ${need_clean} ]; then

        echo_g "Expired releases found and will be removed from project! "

        find ${WORKDIR}/release -mtime +${save_days} -exec rm -rf '{}' \;

        if [ $? -eq 0 ]; then

            echo_g "Expired releases have removed from project! "

        else

            echo_r "Can NOT remove expired releases, please alter to Admin users. "

        fi

    else

        echo_g "All releases are not expired, skipping. "

    fi
 
}
 
# git_project_clone repository branch

function git_project_clone(){

    set -o errexit

    [ $# -ge 1 ] && project_clone_repository="$1"

    project_clone_repository_name="`echo ${project_clone_repository} | awk -F '[/.]+' '{ print $(NF-1)}'`"

    project_clone_directory=${WORKDIR}/repository/${project_clone_repository_name}

    if test -n $2; then

        branch="$2"

    else

        branch="develop"

    fi

    if test ! -d ${project_clone_directory}; then

        echo_b "git clone from $project_clone_repository"

        git clone ${project_clone_repository} ${project_clone_directory} >>${WORKDIR}/git_$(date +%Y%m%d)_$$.log 2>&1

            # TODO(Guodong Ding) get branch names or revision numbers from VCS data
 
        cd ${project_clone_directory}

        git checkout ${branch} >>${WORKDIR}/git_$(date +%Y%m%d)_$$.log 2>&1

        cd ..

        echo_g "git clone from $project_clone_repository successfully! "

    else

        echo_b "git pull from $project_clone_repository"

        cd ${project_clone_directory}

        git pull >>${WORKDIR}/git_$(date +%Y%m%d)_$$.log 2>&1

        git checkout ${branch} >>${WORKDIR}/git_$(date +%Y%m%d)_$$.log 2>&1

        # TODO(Guodong Ding) get branch names or revision numbers from VCS data

        cd ..

        echo_g "git pull from $project_clone_repository successfully! "

    fi

    set +o errexit
}
 
function maven_build_project_deprecated(){

    set -o errexit

    echo_b "Do mvn build java project... "

    check_command_can_be_execute mvn

    [ $# -ge 1 ] && project_clone_repository="$1"

    project_clone_repository_name="`echo ${project_clone_repository} | awk -F '[/.]+' '{ print $(NF-1)}'`"

    project_clone_directory=${WORKDIR}/repository/${project_clone_repository_name}

    cd ${project_clone_directory}

    mvn install >>${WORKDIR}/mvn_build_$(date +%Y%m%d)_$$.log 2>&1

    mvn clean package >>${WORKDIR}/mvn_build_$(date +%Y%m%d)_$$.log 2>&1

    cd ..

    echo_g "Do mvn build java project finished with exit code 0! "

    set +o errexit
}
 
function maven_build_project(){

    echo_b "Do mvn build java project for `echo $1 | awk -F '[/.]+' '{ print $(NF-1)}'`... "

    check_command_can_be_execute mvn

    [ $# -ge 1 ] && project_clone_repository="$1"

    project_clone_repository_name="`echo ${project_clone_repository} | awk -F '[/.]+' '{ print $(NF-1)}'`"

    project_clone_directory=${WORKDIR}/repository/${project_clone_repository_name}
 
    cd ${project_clone_directory}

    mvn install >>${WORKDIR}/mvn_build_$(date +%Y%m%d)_$$.log 2>&1

    retval=$?

    if [ ${retval} -ne 0 ] ; then

        echo_r "mvn install failed! More details refer to ${WORKDIR}/mvn_build_$(date +%Y%m%d)_$$.log"

        exit 1

    else

        echo_g "mvn install for ${project_clone_repository_name} successfully! "

    fi
 
    mvn clean package >>${WORKDIR}/mvn_build_$(date +%Y%m%d)_$$.log 2>&1

    retval=$?

    if [ ${retval} -ne 0 ] ; then

        echo_r "mvn clean package for ${project_clone_repository_name} failed! More details refer to ${WORKDIR}/mvn_build_$(date +%Y%m%d)_$$.log"

        exit 1

    else

        echo_g "mvn clean package for ${project_clone_repository_name} successfully! "

    fi

    cd ..

    echo_g "Do mvn build java project finished for ${project_clone_repository_name} with exit code 0! "
}
 
function check_ssh_can_be_connect(){

    [ $# -ne 1 ] && return 1

    echo_b "Check if can ssh to remote host $1 ... "

    check_command_can_be_execute ssh || return 1

    ssh -i /etc/ssh/ssh_host_rsa_key -p 22 -oStrictHostKeyChecking=no root@$1 "uname -a >/dev/null 2>&1"

    retval=$?

    if [ ${retval} -ne 0 ] ; then

        echo_r "Check ssh to remote host $1 failed! "

        exit 1

    else

        echo_g "Check ssh to remote host $1 successfully! "

    fi
}
 
# ssh_execute_command_on_remote_host hostname command

function ssh_execute_command_on_remote_host(){

    [ $# -ne 2 ] && return 1

    ssh -i /etc/ssh/ssh_host_rsa_key -p 22 -oStrictHostKeyChecking=no root@$1 "$2" >>${WORKDIR}/ssh_command_$(date +%Y%m%d)_$$.log

    retval=$?

    if [ ${retval} -ne 0 ] ; then

        echo_r "ssh execute command on remote host $2 failed! More details refer to ${WORKDIR}/ssh_command_$(date +%Y%m%d)_$$.log"

        return 1

    else

        echo_g "ssh execute command on remote host $2 successfully! "

        return 0

    fi
}
 
function restart_docker_container(){

    echo_b "Restarting docker container..."

    [ $# -ne 1 ] && return 1

    # TODO(Guodong Ding) if we need restart more related docker container

    local docker_container_name=""

    test -n $1 && docker_container_name="$1"

    ssh_execute_command_on_remote_host "docker restart $docker_container_name"

    retval=$?

    if [ ${retval} -ne 0 ] ; then

        echo_r "restart docker container for  $docker_container_name failed! "

        exit 1

    else

        echo_g "restart docker container for $docker_container_name successfully! "

        return 0

    fi
}
 
# scp_local_files_to_remote_host local_path remote_hostname remote_path

function scp_local_files_to_remote_host(){

    [ $# -ne 3 ] && return 1

    [ ! -d $1 -a ! -f $1 ] && return 1

    check_ssh_can_be_connect $2

    scp -i /etc/ssh/ssh_host_rsa_key -P 22 -oStrictHostKeyChecking=no -rp $1 root@$2:$3 >/dev/null 2>&1

    retval=$?

    if [ ${retval} -ne 0 ] ; then

        echo_r "scp local files to remote host failed! "

        exit 1

    else

        echo_g "scp local files to remote host successfully! "

    fi
 
}
 
# scp_remote_files_to_local_host remote_hostname remote_path local_path

function scp_remote_files_to_local_host(){

    [ $# -ne 3 ] && return 1

    check_ssh_can_be_connect $1

    scp -i /etc/ssh/ssh_host_rsa_key -P 22 -oStrictHostKeyChecking=no -rp root@$1:$2 $3 >/dev/null 2>&1

    retval=$?

    if [ ${retval} -ne 0 ] ; then

        echo_r "scp remote files to local host failed! "

        exit 1

    else

        echo_g "scp remote files to local host successfully! "

    fi
}
 
function backup_remote_host_config_files(){

    echo_b "backup remote host config files..."

    scp_remote_files_to_local_host ${deploy_target_host_ip} ${project_top_directory_to_target_host}/* ${WORKDIR}/backup

    # get config files

    [ "$(ls -A ${WORKDIR}/backup)" ] && find ${WORKDIR}/backup/. -type f ! -name . -a ! -name '*.xml*' -a ! -name '*.properties*' -exec rm -f -- '{}' \;

    # remove empty directory

    find ${WORKDIR}/backup/. -empty -type d -delete

    # TODO(Guodong Ding) improvements here

    echo_g "backup remote host config files finished."
}
 
function rollback_remote_host_config_files(){

    echo_b "rollback remote host config files..."

    #scp_local_files_to_remote_host ${WORKDIR}/backup ${deploy_target_host_ip} ${project_top_directory_to_target_host}

    saved_IFS=$IFS

    IFS=' '

    cd ${WORKDIR}/current

    for file in ${WORKDIR}/backup/*;do

        scp_local_files_to_remote_host ${file} ${deploy_target_host_ip} ${project_top_directory_to_target_host}

    done

    cd ${WORKDIR}

    IFS=${saved_IFS}

    # TODO(Guodong Ding) if save remote host config files

    # some ops
 
    # TODO(Guodong Ding) improvements here

    echo_g "rollback remote host config files finished."
}
 
function deploy() {

    [ -n "$header" ] && echo "$header"

    # check a directories lock, Note: this is redundant

    if [[ ! -f ${WORKDIR}/.lock ]]; then

        setDirectoryStructureOnLocalHost

    fi

    cleanOldReleases

    # do dependencies checking

    check_network_connectivity

    check_name_resolve

    checkOtherDependencies
 
    check_ssh_can_be_connect ${deploy_target_host_ip}
 
    # do core job

    # TODO(Guodong Ding) if we need a git_project_clone "$project_clone_depends_1" here using auto judgment statement

    test -z ${project_clone_depends_1} || git_project_clone "$project_clone_depends_1"

    git_project_clone "$project_clone"

    test -z ${project_clone_depends_1} || maven_build_project "$project_clone_depends_1"

    maven_build_project "$project_clone"

    cd ${WORKDIR}
 
    # links_target_directory_to_current

    # Make directory to release directory

    if test ! -d ${WORKDIR}/release -o ! -d ${WORKDIR}/share; then

        echo_r "capistrano directory structure is broken, make sure the file .capistrano_ds_lock is deleted before a new deploy! "

        exit 1
#        test -f ${WORKDIR}/.capistrano_ds_lock && \rm -rf  ${WORKDIR}/.capistrano_ds_lock

    fi

    new_release_just_created="$WORKDIR/release/$(date +%Y%m%d%H%M%S)"

    [ ! -d ${new_release_just_created} ] && mkdir ${new_release_just_created}

    [ -d ${WORKDIR}/repository/${project_clone_repository_name}/target/${project_clone_repository_name}/ ] && \

        \cp -rf ${WORKDIR}/repository/${project_clone_repository_name}/target/${project_clone_repository_name}/* ${new_release_just_created}

     # Make source code symbolic link to current

    ( [ -f ${WORKDIR}/current ] || [ -d ${WORKDIR}/current ] ) && rm -rf ${WORKDIR}/current

    ln -s ${new_release_just_created} ${WORKDIR}/current
 
    # backup remote host config files

    backup_remote_host_config_files
 
#    scp_local_files_to_remote_host ${WORKDIR}/current/ ${deploy_target_host_ip} ${project_top_directory_to_target_host}

    saved_IFS=$IFS

    IFS=' '

    cd ${WORKDIR}/current

    for file in ${WORKDIR}/current/*;do

        scp_local_files_to_remote_host ${file} ${deploy_target_host_ip} ${project_top_directory_to_target_host}

    done

    cd ${WORKDIR}

    IFS=${saved_IFS}
 
    # rollback remote host config files

    rollback_remote_host_config_files
 
    # Move conf and logs directives from release to share

    [ -d ${WORKDIR}/release/conf ] && mv ${WORKDIR}/release/conf ${WORKDIR}/share/conf

    [ -d ${WORKDIR}/release/logs ] && mv ${WORKDIR}/release/logs ${WORKDIR}/share/logs
 
    # Make conf and logs symbolic link to current

    [ -d ${WORKDIR}/share/conf ] && ln -s ${WORKDIR}/share/conf ${WORKDIR}/current/conf

    [ -d ${WORKDIR}/share/logs ] && ln -s ${WORKDIR}/share/logs ${WORKDIR}/current/logs
 
    # Start service or validate status

    if [[ -e ${WORKDIR}/current/bin/startup.sh ]]; then

        ${WORKDIR}/current/bin/startup.sh start

        RETVAL=$?

    else

        # TODO(Guodong Ding) external health check

        test -z ${docker_container_name} || restart_docker_container ${docker_container_name}

        RETVAL=$?

    fi
 
    # if started ok, then create a workable program to a file

    if [[ ${RETVAL} -eq 0 ]]; then

    # Note cat with eof must start at row 0, and with eof end only, such as no blank spaces, etc

    cat >${WORKDIR}/share/workable_program.log <<eof
${new_release_just_created}
eof

    echo_g "Deploy successfully! "

    echo_g "current workable version is $(cat ${WORKDIR}/share/workable_program.log)"
#    ls --color=auto -l ${WORKDIR}/current
#    ls --color=auto -l ${WORKDIR}/current/

    else

        echo_r "Error: Deploy failed! "

        ${WORKDIR}/`basename $0` rollback

    fi
}
 
# Rollback to last right configuration

function rollback() {

    [ -n "$header" ] && echo "$header"

    echo_b "Rollback to last right configuration... "

    # The key is find last files which can work

    WORKABLE_PROGRAM=`cat ${WORKDIR}/share/workable_program.log`

    if [[ -z ${WORKABLE_PROGRAM} ]]; then

        echo_r "Error: Can NOT find workable release version! Please check if it is first deployment! "

        exit 1

    fi

    # Stop service if we have

    if [[ -e ${WORKDIR}/current/bin/startup.sh ]]; then

        ${WORKDIR}/current/bin/startup.sh stop

    fi
 
    # Remove failed deploy

    rm -rf ${WORKDIR}/current
 
    # Remake source code symbolic link to current

    ln -s ${WORKABLE_PROGRAM} ${WORKDIR}/current
 
    # Remake conf and logs symbolic link to current

    [ -d ${WORKDIR}/share/conf ] && ln -s ${WORKDIR}/share/conf ${WORKDIR}/current

    [ -d ${WORKDIR}/share/logs ] && ln -s ${WORKDIR}/share/logs ${WORKDIR}/current
 
    # Start service or validate status

    if [[ -e ${WORKDIR}/current/bin/startup.sh ]]; then

        ${WORKDIR}/current/bin/startup.sh start

        RETVAL=$?

    else

        # TODO(Guodong Ding) external health check

        test -z ${docker_container_name} || restart_docker_container ${docker_container_name}

        RETVAL=$?

    fi
 
    # if started ok, then create a workable program to a file

    if [[ ${RETVAL} -eq 0 ]]; then

        echo_g "Rollback successfully! "

        echo_g "current workable version is $WORKABLE_PROGRAM"
#        ls --color=auto -l ${WORKDIR}/current

    fi
}
 
function destroy() {

    [ -n "$header" ] && echo "$header"

    # echo a Warning message

    echo_y "Warning: This action will destroy all this project, and this is unrecoverable! "

    answer="n"

    echo_y "Do you want to destroy this project? "

    read -p "(Default no,if you want please input: y ,if not please press the enter button):" answer

    case "$answer" in

        y|Y|Yes|YES|yes|yES|yEs|YeS|yeS )

        # delete all file expect for this script self

        # find: warning: Unix filenames usually don't contain slashes (though pathnames do).  That means that '-name `./deploy.sh'' will probably evaluate to false all the time on this system.  You might find the '-wholename' test more useful, or perhaps '-samefile'.  Alternatively, if you are using GNU grep, you could use 'find ... -print0 | grep -FzZ `./deploy.sh''.

            # echo $WORKDIR/

            #find -L $WORKDIR -type f ! -name "$(basename $0)" -exec ls --color=auto -al {} \;

            # find -L . -type f ! -name "deploy.sh" -exec ls --color=auto -al {} \;

            # find -L . -type d -exec ls --color=auto -al {} \;

            # find -L ./ -maxdepth 1 ! -name "deploy.sh" ! -wholename "./"

        # ls | grep -v "filename" | xargs rm -rf

        find -L ${WORKDIR} -maxdepth 1 ! -name "$(basename $0)" ! -wholename "$WORKDIR"  -exec rm -rf '{}' \;

        if [ $? -eq 0 ];then

            test -f ${WORKDIR}/.capistrano_ds_lock && \rm -rf  ${WORKDIR}/.capistrano_ds_lock

            echo_g "Destroy this project successfully! Now will exit with status 0. "

            exit 0

        else

            echo_r "Error: something go wrong! Please check or alter to Admin user! "

            exit 1

        fi

        ;;

        n|N|No|NO|no|nO)

        echo_g "destroy action is cancel"

        exit 0

        ;;

        *)

        echo_r "Are you kidding me? You are a bad kid! "

        exit 1

        ;;

    esac
 
}
 
function main(){

    lock_filename="lock_$$_$RANDOM"
#    lock_filename_full_path="/var/lock/subsys/$lock_filename"

    lock_filename_full_path="/var/lock/$lock_filename"

    if ( set -o noclobber; echo "$$" > "$lock_filename_full_path") 2> /dev/null;then

        trap 'rm -f "$lock_filename_full_path"; exit $?' INT TERM EXIT

        # Just a test for call itself, comment it

         if [[ $# -ne 1 ]]; then
#            $0 deploy

            [ ! -x ${WORKDIR}/`basename $0` ] && chmod +x ${WORKDIR}/`basename $0`

            ${WORKDIR}/`basename $0` deploy

            exit 0

         fi

        case $1 in

            deploy)

                deploy

                ;;

            rollback)

                rollback

                ;;

            destroy)

                destroy

                ;;

            help|*)

                echo "Usage: $0 {deploy|rollback|destroy} with $0 itself"

                exit 1

                ;;

        esac
 
        rm -f "$lock_filename_full_path"

        trap - INT TERM EXIT

    else

        echo "Failed to acquire lock: $lock_filename_full_path"

        echo "held by $(cat ${lock_filename_full_path})"
fi
 
}
 
main $@
 
# debug option
#${_XTRACE_FUNCTIONS}

运行效果：

可以尝试使用Chrome浏览器打开该页面，右键单击，选择“在新标签页中打开图片”查看清晰大图。

推荐Windows用户使用PyCharm（5.0.x）结合Bash Support插件编辑bash shell script文件。

注：由于该脚本的大幅度更新，因此最新的运行效果图可以自行运行观察。

--end--

本文转自 urey_pp 51CTO博客，原文链接：http://blog.51cto.com/dgd2010/1771555，如需转载请自行联系原作者