自动化部署java maven项目到多个目标主机的Shell脚本-阿里云开发者社区

本篇是《Linux Shell脚本之远程自动化部署java maven项目》的姊妹篇，但包含了bug、issue修正和添加了更多的支持特性，可以从GitHub上获取最新脚本内容：https://github.com/DingGuodong/AutomaticDeployJavaMavenProject 。

自动化部署java maven项目到多个主机的环境条件假设：

1.java maven项目至多有一个依赖项目

2.多个目标主机上的部署目录是相同的

支持特性：

1.在部署主机上将java maven项目以及依赖项目（当前脚本的编写只假设依赖项目只有一个）编译，将编译后的Class以及配置文件通过ssh上传到单个或多个目标主机的指定目录

2.单个目标主机部署模式支持手动版本回滚和自动回滚，多个目标主机部署模式支持手动回滚（手动回滚的意思就是需要人工选择需要回滚的版本）

3.支持在线更新配置文件，配置文件更新后运行脚本中的backup_manual函数，重新执行deploy[s]操作即可

4,允许用户定义是否跳过网络自检，这个特性在网络管理员禁用ICMP协议以及属于内网部署时有用

使用办法：
将脚本上传到Linux任意目录，修改以下变量：

 
        user_defined_project_clone_depends=
        "ssh://git@git.huntor.cn:18082/core/business-service-base.git" 
        # java maven项目的相关依赖源码文件所在的git地址，如果没有依赖则可省略 
       
        user_defined_project_clone=
        "ssh://git@git.huntor.cn:18082/core/business-service-core.git" 
        # java maven项目的源码文件所在的git地址 
       
        user_defined_deploy_target_host_ip=
        "10.6.28.135" 
        # 如果部署单个目标主机则在此处填写一个IP，无论是否部署多个目标主机，此项不能为空，多个目标主机的部署模式会用到这个主机上的配置文件 
       
        user_defined_deploy_targets_host_ip_list=
        "10.6.28.135 10.6.28.28" 
        # 如果一次性部署多个目标主机，则填写多个IP，用空格隔开，第一个IP必须与上面的user_defined_deploy_target_host_ip相同 
       
        user_defined_project_top_directory_to_target_host=
        "/tmp/deploy_test_target" 
        # 部署到目标主机上的哪一个目录 
       
        user_defined_docker_container_name=
        "testcontainer" 
        # 需要重启的容器名称 
       
        user_defined_project_conf_directory=
        "backup" 
        # 配置文件目录的绝对路径或者与此脚本相同目录位置的相对路径 
       
        user_defined_skip_check_network_and_resolver=
        "true" 
        # 如果想跳过网络自检，则设置为true，否则设置为false。

运行脚本和使用方法：
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 deploy 
        # 部署单个目标主机 
       
        bash 
        /path/to/this
        .sh deploys 
        # 部署多个目标主机 
       
        bash 
        /path/to/this
        .sh rollback_manual 
        # 手动回滚单个目标主机 
       
        bash 
        /path/to/this
        .sh rollbacks 
        # 手动回滚多个目标主机 
       
        bash 
        /path/to/this
        .sh backup_manual 
        # 当日志文件发生变更时，需要执行此命令，将配置文件同步到本地配置库

首次执行需要将配置文件的绝对路径准确的放入项目目录中，一次写入后期无须修改，如需修改配置文件，则直接修改部署目标主机上的配置文件（目标主机的第一个IP），每次修改完配置文件后需要执行bash /path/to/this.sh backup_manual命令，将配置文件同步到本地配置库（默认的位置是脚本所在目录下的backup目录）。

脚本内容：

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

 
        #!/bin/bash
       
        # Name: doDeploy.sh
       
        #Execute this shell script to deploy Java projects built by Maven automatically on remote hosts.
       
        # debug option
       
        DEBUG=
        false 
       
        #DEBUG=true
       
        if 
        $DEBUG ; 
        then 
       
        old_PS4=$PS4 
       
        #    export PS4='+${BASH_SOURCE}:${LINENO}:${FUNCNAME[0]}: '
       
        export 
        PS4=
        '+${LINENO}: ${FUNCNAME[0]}: ' 
        # if there is only one bash script, do not display ${BASH_SOURCE} 
       
        _XTRACE_FUNCTIONS=$(
        set 
        +o | 
        grep 
        xtrace) 
       
        set 
        -o xtrace 
       
        fi
       
        # 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 
       
        "
       
        # user defined variables
       
        # Where to get source code
       
        user_defined_project_clone_depends=
        "ssh://git@git.huntor.cn:18082/core/business-service-base.git" 
       
        user_defined_project_clone=
        "ssh://git@git.huntor.cn:18082/core/business-service-core.git" 
       
        # TODO(Guodong Ding) do deploy once time with multi-hosts support, try using 'for + deploy'
       
        user_defined_deploy_target_host_ip=
        "10.6.28.135" 
        # this is a mandatory field, and must be same as the first ip in $user_defined_deploy_targets_host_ip_list 
       
        user_defined_deploy_targets_host_ip_list=
        "10.6.28.135 10.6.28.28" 
       
        #user_defined_project_top_directory_to_target_host="/data/docker/business-service/bs-core-01"
       
        #user_defined_docker_container_name="bs-core-01"
       
        user_defined_project_top_directory_to_target_host=
        "/tmp/deploy_test_target" 
       
        user_defined_docker_container_name=
        "testcontainer" 
        # if you using a docker container other than a startup script located in sourcecode/bin/startup.sh, then set this to docker container name 
       
        user_defined_project_conf_directory=
        "backup" 
        # if you do NOT want to use configurations from deploy target, you should set this variable to where pointed to config files 
       
        user_defined_skip_check_network_and_resolver=
        "true" 
        # if system administrator disable ICMP protocol, set this any content but not null 
       
        # 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 ${user_defined_project_clone_depends} || project_clone_target_depends_1=
        "`echo ${user_defined_project_clone_depends} | awk -F '[/.]+' '{ print $(NF-1)}'`" 
       
        project_clone_target=
        "`echo ${user_defined_project_clone} | awk -F '[/.]+' '{ print $(NF-1)}'`" 
       
        project_clone_repository_name=${project_clone_target}
       
        deployment_mode=
        "" 
       
        # 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 Level 1 
       
        [ $
        # -ne 1 ] && return 1 
       
        echo 
        -e 
        "\033[34m$1\033[0m" 
       
        }
       
        function 
        echo_p (){ 
       
        # Color purple,magenta: Debug Level 2 
       
        [ $
        # -ne 1 ] && return 1 
       
        echo 
        -e 
        "\033[35m$1\033[0m" 
       
        }
       
        function 
        echo_c (){ 
       
        # Color cyan: friendly prompt, Level 1 
       
        [ $
        # -ne 1 ] && return 1 
       
        echo 
        -e 
        "\033[36m$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
       
        function 
        command_exists() { 
       
        # which "$@" >/dev/null 2>&1 
       
        command 
        -
        v 
        "$@" 
        >
        /dev/null 
        2>&1 
       
        }
       
        function 
        check_command_can_be_execute(){ 
       
        [ $
        # -ne 1 ] && return 1 
       
        command_exists $1 
       
        }
       
        function 
        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! " 
       
        echo 
       
        fi 
       
        }
       
        function 
        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! " 
       
        echo 
       
        return 
        0 
       
        fi 
       
        }
       
        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 
       
        # TODO(Guodong Ding) ssh can connect to remote host by using /etc/ssh/ssh_host_rsa_key or ~/.ssh/id_rsa 
       
        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 
       
        }
       
        function 
        check_other_dependencies() { 
       
        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 ${user_defined_project_clone} ]]; 
        then 
       
        echo_r 
        "Error: user_defined_project_clone is undefined! " 
       
        exit 
        1 
       
        fi 
       
        # Note: test command is strongly typed, can recognize string type and integer type 
       
        if 
        test 
        ! -z 
        "$user_defined_deploy_target_host_ip" 
        -a ! -z 
        "$user_defined_deploy_targets_host_ip_list" 
        ; 
        then 
       
        user_defined_deploy_targets_host_first_ip_in_list=
        "`echo "
        $user_defined_deploy_targets_host_ip_list
        " | awk -F ' ' '{ print $1 }'`" 
       
        if 
        test 
        "$user_defined_deploy_target_host_ip" 
        = 
        "$user_defined_deploy_targets_host_first_ip_in_list" 
        -a 
        "$deployment_mode" 
        = 
        "0" 
        ; 
        then 
       
        echo_g 
        "Run this shell script in multi-deployment mode, deploy to a group of hosts." 
       
        saved_IFS=$IFS 
       
        IFS=
        ' ' 
       
        for 
        ipaddress 
        in 
        ${user_defined_deploy_targets_host_ip_list}; 
        do 
       
        check_ssh_can_be_connect $ipaddress 
       
        done 
       
        IFS=$saved_IFS 
       
        else 
       
        echo_r 
        "$user_defined_deploy_targets_host_ip_list is not equal to $user_defined_deploy_target_host_ip, this is a must! " 
       
        exit 
        1 
       
        fi 
       
        elif 
        test 
        ! -z 
        "$user_defined_deploy_target_host_ip" 
        -a -z 
        "$user_defined_deploy_targets_host_ip_list" 
        -a 
        "$deployment_mode" 
        = 
        "1" 
        ;
        then 
       
        echo_g 
        "Run this shell script in standalone-deployment mode, deploy to single host." 
       
        elif 
        test 
        -z 
        "$user_defined_deploy_target_host_ip" 
        -a -z 
        "$user_defined_deploy_targets_host_ip_list" 
        ;
        then 
       
        echo_r 
        "Error: both user_defined_deploy_target_host_ip and user_defined_deploy_targets_host_ip_list is undefined! " 
       
        exit 
        1 
       
        else 
       
        echo_r 
        "Error: bad user defined parameters, please fix it and try again! " 
       
        exit 
        1 
       
        fi 
       
        if 
        [[ -z ${user_defined_project_top_directory_to_target_host} ]]; 
        then 
       
        echo_r 
        "Error: user_defined_project_top_directory_to_target_host is undefined! " 
       
        exit 
        1 
       
        fi 
       
        if 
        test 
        -z $user_defined_project_conf_directory; 
        then 
       
        echo_y 
        "Warning: user defined project conf directory is not defined! " 
       
        fi 
       
        echo_g 
        "\tChecking user customized and defined 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! " 
       
        echo 
       
        }
       
        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! " 
       
        echo 
       
        }
       
        function 
        clean_old_releases(){ 
       
        echo_b 
        "Clean old releases... " 
       
        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_c 
        "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 feel free to alter to administrators. " 
       
        fi 
       
        else 
       
        echo_g 
        "All releases are not expired, skipping. " 
       
        fi 
       
        }
       
        function 
        clean_old_logs(){ 
       
        echo_b 
        "Clean old logs... " 
       
        save_days=${save_old_releases_for_days:-10} 
       
        need_clean=$(
        find 
        ${WORKDIR}/ -name 
        "*.log" 
        -mtime +${save_days} -
        exec 
        ls 
        '{}' 
        \;) 
       
        if 
        [ ! -z ${need_clean} ]; 
        then 
       
        echo_c 
        "Expired releases found and will be removed from project! " 
       
        find 
        -L ${WORKDIR}/ -maxdepth 1 -name 
        "*.log" 
        -a ! -name 
        "^." 
        -mtime +${save_days} -
        exec 
        rm 
        -rf 
        '{}' 
        \; 
       
        if 
        [ $? -
        eq 
        0 ]; 
        then 
       
        echo_g 
        "Expired logs have removed from project! " 
       
        else 
       
        echo_r 
        "Can NOT remove expired logs, please feel free to alter to administrators. " 
       
        fi 
       
        else 
       
        echo_g 
        "All logs 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 git@github.com:name/app.git -b master 
       
        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 
        ${WORKDIR} 
       
        echo_g 
        "Do mvn build java project finished for ${project_clone_repository_name} with exit code 0! " 
       
        echo 
       
        }
       
        # 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 2>&1 
       
        retval=$? 
       
        if 
        [ ${retval} -
        ne 
        0 ] ; 
        then 
       
        echo_r 
        "ssh execute command on remote host $2 failed! " 
       
        test 
        -s ${WORKDIR}
        /ssh_command_
        $(
        date 
        +%Y%m%d)_$$.log && echo_r 
        "\tMore details refer to ${WORKDIR}/ssh_command_$(date +%Y%m%d)_$$.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 2 ] && return 1 
       
        # TODO(Guodong Ding) if we need restart more related docker container 
       
        local 
        user_defined_docker_container_name=
        "" 
       
        local 
        remote_host_ip=
        "" 
       
        test 
        -n $1 && remote_host_ip=
        "$1" 
       
        test 
        -n $1 && user_defined_docker_container_name=
        "$2" 
       
        ssh_execute_command_on_remote_host 
        "$remote_host_ip" 
        "docker restart $user_defined_docker_container_name" 
       
        retval=$? 
       
        if 
        [ ${retval} -
        ne 
        0 ] ; 
        then 
       
        echo_r 
        "restart docker container for  $user_defined_docker_container_name on $remote_host_ip failed! " 
       
        exit 
        1 
       
        else 
       
        echo_g 
        "restart docker container for $user_defined_docker_container_name on $remote_host_ip 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_single_file(){ 
       
        set 
        -o errexit 
       
        if 
        [ 
        "$#" 
        -
        ne 
        1 ]; 
        then 
       
        return 
        1 
       
        fi 
       
        backup_filename_origin=
        "$1" 
       
        operation_date_time=
        "`date +"
        %Y%m%d%H%M%S
        "`" 
       
        backup_filename_prefix=
        ".backup_" 
       
        backup_filename_suffix=
        "_origin_$operation_date_time~" 
       
        backup_filename_target=
        "$backup_filename_prefix$backup_filename_origin$backup_filename_suffix" 
       
        test 
        -f $backup_filename_origin && 
        cp 
        $backup_filename_origin $backup_filename_target 
       
        set 
        +o errexit 
       
        }
       
        # Function description: backup files
       
        # Note: accept $@ parameters
       
        function 
        backup_files(){ 
       
        # TODO(Guodong Ding) improvements here 
       
        set 
        -o errexit 
       
        if 
        [ $
        # -eq 0 ]; then 
       
        return 
        1 
       
        fi 
       
        file_list=$@ 
       
        operation_date_time=
        "_`date +"
        %Y%m%d%H%M%S
        "`" 
       
        log_filename=
        ".log_$$_${RANDOM}" 
       
        log_filename_full_path=
        /tmp/
        $log_filename 
       
        touch 
        $log_filename_full_path 
       
        old_IFS=$IFS 
       
        IFS=
        " " 
       
        for 
        file 
        in 
        $file_list;
        do 
       
        real_file=$(realpath $
        file
        ) 
       
        [ -f $real_file ] && 
        cp 
        $real_file $
        file
        $operation_date_time~ 
       
        [ -f $log_filename_full_path ] && 
        echo 
        "\mv -f $file$operation_date_time~ $file" 
        >>$log_filename_full_path 
       
        done 
       
        IFS=
        "$old_IFS" 
       
        set 
        +o errexit 
       
        return 
        0 
       
        }
       
        # Function description:
       
        function 
        rollback_files(){ 
       
        # TODO(Guodong Ding) improvements here 
       
        [ -f $log_filename_full_path ] && . $log_filename_full_path 
       
        \
        rm 
        -f $log_filename_full_path 
       
        exit 
        2 
       
        }
       
        function 
        backup_directories(){ 
       
        # TODO(Guodong Ding) continue here 
       
        if 
        [ $
        # -ne 1 ]; then 
       
        return 
        1 
       
        fi 
       
        backup_filename_origin=
        "$1" 
       
        operation_date_time=
        "`date +"
        %Y%m%d%H%M%S
        "`" 
       
        backup_filename_prefix=
        ".backup_" 
       
        backup_filename_suffix=
        "_origin_$operation_date_time~" 
       
        backup_filename_target=
        "$backup_filename_prefix$backup_filename_origin$backup_filename_suffix" 
       
        test 
        -f $backup_filename_origin && 
        cp 
        -r $backup_filename_origin $backup_filename_target 
       
        }
       
        function 
        rollback_directories(){ 
       
        # TODO(Guodong Ding) continue here 
       
        return 
       
        }
       
        #
       
        function 
        backup_remote_host_config_files(){ 
       
        # TODO(Guodong Ding) did not throw a exception when first deploy and test -z "$user_defined_project_conf_directory" 
       
        echo_b 
        "backup remote host config files..." 
       
        # backup operation only executed once time, using '$0 backup_manual' backup new configuration files. 
       
        # if ${WORKDIR}/backup is not empty then return 0 to exit 
       
        if 
        [ 
        "$(ls -A ${WORKDIR}/backup)" 
        ]; 
        then 
       
        [ -f ${WORKDIR}
        /backup/
        .backup_operation_once.log ] && backup_operation=
        "`cat ${WORKDIR}/backup/.backup_operation_once.log`" 
       
        echo_g 
        "Backup remote host config files operation had been done, $backup_operation, now skipping ... " 
       
        return 
        0 
       
        fi 
       
        # TODO(Guodong Ding) if $user_defined_project_conf_directory is empty and remote host target directory is empty(first deploy), will cause exit with 1 
       
        ssh_execute_command_on_remote_host $user_defined_deploy_target_host_ip 
        "test \"\$(ls -A $user_defined_project_top_directory_to_target_host 2>/dev/null)\"" 
       
        if 
        test 
        $? -
        eq 
        0; 
        then 
       
        scp_remote_files_to_local_host ${user_defined_deploy_target_host_ip} ${user_defined_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*' 
        -a ! -name 
        '*.version*' 
        -
        exec 
        rm 
        -f -- 
        '{}' 
        \; 
       
        # remove empty directory, 'for + rmdir' 
       
        find 
        ${WORKDIR}
        /backup/
        . -empty -
        type 
        d -delete 
       
        # TODO(Guodong Ding) improvements here 
       
        echo_g 
        "backup remote host config files finished." 
       
        echo 
        "`date +%Y%m%d`" 
        > ${WORKDIR}
        /backup/
        .backup_operation_once.log 
       
        else 
       
        echo_y 
        "This maybe first time to deploy or variable 'user_defined_project_conf_directory' is not defined! " 
       
        fi 
       
        }
       
        function 
        rollback_remote_host_config_files(){ 
       
        echo_b 
        "rollback remote host config files..." 
       
        #scp_local_files_to_remote_host ${WORKDIR}/backup ${user_defined_deploy_target_host_ip} ${user_defined_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
        } ${user_defined_deploy_target_host_ip} ${user_defined_project_top_directory_to_target_host} 
       
        # override all configuration files to current 
       
        \
        cp 
        -r ${
        file
        } ${WORKDIR}
        /current 
       
        done 
       
        cd 
        ${WORKDIR} 
       
        IFS=${saved_IFS} 
       
        # TODO(Guodong Ding) if save remote host config files, if there are no changes on config files 
       
        # some ops 
       
        # TODO(Guodong Ding) improvements here 
       
        echo_g 
        "rollback remote host config files finished." 
       
        }
       
        function 
        make_current_workable_source(){ 
       
        # check a directories lock, Note: this is redundant 
       
        if 
        [[ ! -f ${WORKDIR}/.capistrano_ds_lock ]]; 
        then 
       
        setDirectoryStructureOnLocalHost 
       
        fi 
       
        clean_old_releases 
       
        clean_old_logs 
       
        # do dependencies checking 
       
        if 
        test 
        ! -z $user_defined_skip_check_network_and_resolver; 
        then 
       
        echo_g 
        "skipping checking network connectivity and name resolve." 
       
        else 
       
        check_network_connectivity 
       
        check_name_resolve 
       
        fi 
       
        check_other_dependencies 
       
        # do core job 
       
        # TODO(Guodong Ding) if we need a git_project_clone "$user_defined_project_clone_depends" here using auto judgment statement 
       
        test 
        -z ${user_defined_project_clone_depends} || git_project_clone 
        "$user_defined_project_clone_depends" 
       
        git_project_clone 
        "$user_defined_project_clone" 
       
        test 
        -z ${user_defined_project_clone_depends} || maven_build_project 
        "$user_defined_project_clone_depends" 
       
        maven_build_project 
        "$user_defined_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! " 
       
        #        test -f ${WORKDIR}/.capistrano_ds_lock && \rm -rf  ${WORKDIR}/.capistrano_ds_lock
       
        exit 
        1 
       
        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 
       
        # Move conf and logs directives from release to share if found 
       
        [ -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 
       
        }
       
        # distribute current workable files to remote host
       
        function 
        deploy() { 
       
        # do make_current_workable_source before deploy every time 
       
        make_current_workable_source 
       
        echo_b 
        "Do deploy on $user_defined_deploy_target_host_ip ..." 
       
        # backup remote host config files 
       
        [ -z ${user_defined_project_conf_directory} ] && backup_remote_host_config_files 
       
        saved_IFS=$IFS 
       
        IFS=
        ' ' 
       
        cd 
        ${WORKDIR}
        /current 
       
        for 
        file 
        in 
        ${WORKDIR}
        /current/
        *;
        do 
       
        scp_local_files_to_remote_host ${
        file
        } ${user_defined_deploy_target_host_ip} ${user_defined_project_top_directory_to_target_host} 
       
        done 
       
        cd 
        ${WORKDIR} 
       
        IFS=${saved_IFS} 
       
        # rollback remote host config files 
       
        [ -z ${user_defined_project_conf_directory} ] && rollback_remote_host_config_files 
       
        if 
        test 
        ! -z 
        "${user_defined_project_conf_directory}" 
        -a -d ${user_defined_project_conf_directory} ; 
        then 
       
        saved_IFS=$IFS 
       
        IFS=
        ' ' 
       
        cd 
        ${WORKDIR}
        /current 
       
        for 
        file 
        in 
        ${user_defined_project_conf_directory}/*;
        do 
       
        scp_local_files_to_remote_host ${
        file
        } ${user_defined_deploy_target_host_ip} ${user_defined_project_top_directory_to_target_host} 
       
        # override all configuration files to current 
       
        \
        cp 
        -rf $
        file 
        ${WORKDIR}
        /current 
       
        done 
       
        cd 
        ${WORKDIR} 
       
        IFS=${saved_IFS} 
       
        fi 
       
        # backup remote host config files to local again for next using 
       
        [ ! -z ${user_defined_project_conf_directory} ] && backup_remote_host_config_files 
       
        # Start service or validate status on remote host 
       
        if 
        [[ -e ${WORKDIR}
        /current/bin/startup
        .sh ]]; 
        then 
       
        ssh_execute_command_on_remote_host $user_defined_deploy_target_host_ip 
        "$user_defined_project_top_directory_to_target_host/bin/startup.sh start" 
       
        RETVAL=$? 
       
        else 
       
        test 
        -z ${user_defined_docker_container_name} || restart_docker_container $user_defined_deploy_target_host_ip ${user_defined_docker_container_name} 
       
        # TODO(Guodong Ding) external health check 
       
        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 for $user_defined_deploy_target_host_ip! " 
       
        echo_g 
        "Current workable version is $(cat ${WORKDIR}/share/workable_program.log)" 
       
        else 
       
        echo_r 
        "Error: Deploy failed! " 
       
        ${WORKDIR}/`
        basename 
        $0` rollback 
       
        fi 
       
        }
       
        # Rollback to last right configuration
       
        function 
        rollback() { 
       
        echo_b 
        "Rollback to last right configuration... " 
       
        # The key point 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 
       
        ssh_execute_command_on_remote_host ${user_defined_deploy_target_host_ip} 
        "$user_defined_project_top_directory_to_target_host/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 
       
        # backup remote host config files 
       
        [ -z ${user_defined_project_conf_directory} ] && backup_remote_host_config_files 
       
        #    scp_local_files_to_remote_host ${WORKDIR}/current/ ${user_defined_deploy_target_host_ip} ${user_defined_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
        } ${user_defined_deploy_target_host_ip} ${user_defined_project_top_directory_to_target_host} 
       
        done 
       
        cd 
        ${WORKDIR} 
       
        IFS=${saved_IFS} 
       
        # rollback remote host config files 
       
        [ -z ${user_defined_project_conf_directory} ] && rollback_remote_host_config_files 
       
        if 
        test 
        ! -z 
        "${user_defined_project_conf_directory}" 
        -a -d ${user_defined_project_conf_directory}; 
        then 
       
        saved_IFS=$IFS 
       
        IFS=
        ' ' 
       
        cd 
        ${WORKDIR}
        /current 
       
        for 
        file 
        in 
        ${user_defined_project_conf_directory}/*;
        do 
       
        scp_local_files_to_remote_host ${
        file
        } ${user_defined_deploy_target_host_ip} ${user_defined_project_top_directory_to_target_host} 
       
        done 
       
        cd 
        ${WORKDIR} 
       
        IFS=${saved_IFS} 
       
        fi 
       
        # Start service or validate status 
       
        if 
        [[ -e ${WORKDIR}
        /current/bin/startup
        .sh ]]; 
        then 
       
        ssh_execute_command_on_remote_host $user_defined_deploy_target_host_ip 
        "$user_defined_project_top_directory_to_target_host/bin/startup.sh restart" 
       
        RETVAL=$? 
       
        else 
       
        test 
        -z ${user_defined_docker_container_name} || restart_docker_container $user_defined_deploy_target_host_ip ${user_defined_docker_container_name} 
       
        # TODO(Guodong Ding) external health check 
       
        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" 
       
        fi 
       
        }
       
        # rollback to any workable version which user wished by manually
       
        function 
        rollback_manual(){ 
       
        echo_b 
        "This function will rollback to any workable version which user wished by manually." 
       
        # TODO(Guodong Ding) linux shell trap command several ctrl+c 
       
        echo_p 
        "Enter 'reset' command to reset terminal when something go wrong." 
       
        read 
        -e -s -n 1 -p 
        "Press any key to continue or Press 'Ctrl+C' exit." 
       
        if 
        test 
        -d $WORKDIR
        /release 
        -a 
        "$(ls -A $WORKDIR/release 2>/dev/null)" 
        ;
        then 
        # judge a directory if is empty 
       
        echo_b 
        "Current workable releases( Latest 5 ) are here: " 
       
        # Alternative implementation: ls -u -1 -d $WORKDIR/release/* | tail -n6 | sed -n '1,4p' 
       
        ls 
        -u -1 -d $WORKDIR
        /release/
        * | 
        tail 
        -n6 | 
        head 
        -n4 
       
        read 
        -p 
        "Which release do you want rollback? Press Enter after input. " 
        user_input_release_to_rollback 
       
        if 
        test 
        -d $user_input_release_to_rollback; 
        then 
       
        rm 
        -rf ${WORKDIR}
        /current 
       
        ln 
        -s ${user_input_release_to_rollback} ${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 
       
        # backup remote host config files 
       
        [ -z ${user_defined_project_conf_directory} ] && backup_remote_host_config_files 
       
        #            # rollback remote host config files
       
        #            [ -z ${user_defined_project_conf_directory} ] && rollback_remote_host_config_files
       
        if 
        test 
        ! -z 
        "${user_defined_project_conf_directory}" 
        -a -d ${user_defined_project_conf_directory}; 
        then 
       
        saved_IFS=$IFS 
       
        IFS=
        ' ' 
       
        cd 
        ${WORKDIR}
        /current 
       
        for 
        file 
        in 
        ${user_defined_project_conf_directory}/*;
        do 
       
        \
        cp 
        -rf $
        file 
        ${WORKDIR}
        /current 
       
        done 
       
        cd 
        ${WORKDIR} 
       
        IFS=${saved_IFS} 
       
        fi 
       
        saved_IFS=$IFS 
       
        IFS=
        ' ' 
       
        cd 
        ${WORKDIR}
        /current 
       
        for 
        file 
        in 
        ${WORKDIR}
        /current/
        *;
        do 
       
        # TODO(Guodong Ding) scp timeout 
       
        scp_local_files_to_remote_host ${
        file
        } ${user_defined_deploy_target_host_ip} ${user_defined_project_top_directory_to_target_host} 
       
        done 
       
        cd 
        ${WORKDIR} 
       
        IFS=${saved_IFS} 
       
        # Start service or validate status 
       
        if 
        [[ -e ${WORKDIR}
        /current/bin/startup
        .sh ]]; 
        then 
       
        #                ${WORKDIR}/current/bin/startup.sh restart
       
        ssh_execute_command_on_remote_host $user_defined_deploy_target_host_ip 
        "$user_defined_project_top_directory_to_target_host/bin/startup.sh restart" 
       
        RETVAL=$? 
       
        else 
       
        test 
        -z ${user_defined_docker_container_name} || restart_docker_container $user_defined_deploy_target_host_ip ${user_defined_docker_container_name} 
       
        # TODO(Guodong Ding) external health check 
       
        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 $user_input_release_to_rollback" 
       
        cat 
        >${WORKDIR}
        /share/workable_program
        .log <<eof 
       
        ${user_input_release_to_rollback}
       
        eof
       
        fi 
       
        else 
       
        echo_r 
        "The release you want to rollback is not present, Please  try again! " 
       
        fi 
       
        else 
       
        echo_r 
        "Error: Can NOT find workable release version! Please check if it is first deployment! " 
       
        exit 
        1 
       
        fi 
       
        }
       
        # backup remote hosts config files only,
       
        # use this function when you modify some config files on remote host
       
        function 
        backup_manual(){ 
       
        set 
        -o errexit 
       
        echo_b 
        "backup remote host config files..." 
       
        scp_remote_files_to_local_host ${user_defined_deploy_target_host_ip} 
        "${user_defined_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*' 
        -a ! -name 
        '*.version*' 
        -
        exec 
        rm 
        -f -- 
        '{}' 
        \; 
       
        # remove empty directory, 'for + rmdir' 
       
        find 
        ${WORKDIR}
        /backup/
        . -empty -
        type 
        d -delete 
       
        # TODO(Guodong Ding) improvements here 
       
        echo_g 
        "backup remote host config files finished." 
       
        echo 
        "`date +%Y%m%d`" 
        > ${WORKDIR}
        /backup/
        .backup_operation_once.log 
       
        set 
        +o errexit 
       
        }
       
        # distribute current workable files to remote hosts
       
        function 
        deploys() { 
       
        # do make_current_workable_source before deploy every time 
       
        make_current_workable_source 
       
        echo_b 
        "Do deploy on $user_defined_deploy_targets_host_ip_list ..." 
       
        for 
        remote_host_ip 
        in 
        $user_defined_deploy_targets_host_ip_list;
        do 
       
        echo_b 
        "Do deploy on $remote_host_ip ..." 
       
        saved_IFS=$IFS 
       
        IFS=
        ' ' 
       
        cd 
        ${WORKDIR}
        /current 
       
        for 
        file 
        in 
        ${WORKDIR}
        /current/
        *;
        do 
       
        scp_local_files_to_remote_host ${
        file
        } ${remote_host_ip} ${user_defined_project_top_directory_to_target_host} 
       
        done 
       
        cd 
        ${WORKDIR} 
       
        IFS=${saved_IFS} 
       
        # rollback remote host config files 
       
        [ -z ${user_defined_project_conf_directory} ] && rollback_remote_host_config_files 
       
        if 
        test 
        ! -z 
        "${user_defined_project_conf_directory}" 
        -a -d ${user_defined_project_conf_directory}; 
        then 
       
        saved_IFS=$IFS 
       
        IFS=
        ' ' 
       
        cd 
        ${WORKDIR}
        /current 
       
        for 
        file 
        in 
        ${user_defined_project_conf_directory}/*;
        do 
       
        scp_local_files_to_remote_host ${
        file
        } ${remote_host_ip} ${user_defined_project_top_directory_to_target_host} 
       
        done 
       
        cd 
        ${WORKDIR} 
       
        IFS=${saved_IFS} 
       
        fi 
       
        # Start service or validate status on remote host 
       
        if 
        [[ -e ${WORKDIR}
        /current/bin/startup
        .sh ]]; 
        then 
       
        #        ${WORKDIR}/current/bin/startup.sh start 
       
        ssh_execute_command_on_remote_host $remote_host_ip 
        "$user_defined_project_top_directory_to_target_host/bin/startup.sh start" 
       
        RETVAL=$? 
       
        else 
       
        test 
        -z ${user_defined_docker_container_name} || restart_docker_container $remote_host_ip ${user_defined_docker_container_name} 
       
        # TODO(Guodong Ding) external health check 
       
        RETVAL=$? 
       
        fi 
       
        if 
        [[ ${RETVAL} -
        eq 
        0 ]]; 
        then 
       
        echo_g 
        "Deploy successfully on $remote_host_ip! " 
       
        else 
       
        echo_r 
        "Error: Deploy failed! on $remote_host_ip! " 
       
        echo_p 
        "Try modify $user_defined_deploy_target_host_ip and using standalone deployment mode" 
       
        exit 
        1 
       
        fi 
       
        done 
       
        # 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 finished! on $user_defined_deploy_targets_host_ip_list " 
       
        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` rollbacks 
       
        fi 
       
        }
       
        function 
        rollbacks(){ 
       
        echo_b 
        "This function will rollback to any workable version which user wished by manually." 
       
        # TODO(Guodong Ding) linux shell trap command several ctrl+c 
       
        echo_p 
        "Enter 'reset' command to reset terminal when something go wrong." 
       
        read 
        -e -s -n 1 -p 
        "Press any key to continue or Press 'Ctrl+C' exit. Enter 'reset' command to reset terminal when something go wrong." 
       
        if 
        test 
        -d $WORKDIR
        /release 
        -a 
        "$(ls -A $WORKDIR/release 2>/dev/null)" 
        ;
        then 
        # judge a directory if is empty 
       
        echo_b 
        "Current workable releases( Latest 5 ) are here: " 
       
        #        ls -d -1 $WORKDIR/release/*
       
        ls 
        -u -1 -d $WORKDIR
        /release/
        * | 
        tail 
        -n5 
       
        read 
        -p 
        "Which release do you want rollback? Press Enter after input. " 
        user_input_release_to_rollback 
       
        if 
        test 
        -d $user_input_release_to_rollback; 
        then 
       
        rm 
        -rf ${WORKDIR}
        /current 
       
        ln 
        -s ${user_input_release_to_rollback} ${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 
       
        # backup remote host config files 
       
        [ -z ${user_defined_project_conf_directory} ] && backup_remote_host_config_files 
       
        #    scp_local_files_to_remote_host ${WORKDIR}/current/ ${user_defined_deploy_target_host_ip} ${user_defined_project_top_directory_to_target_host} 
       
        saved_IFS=$IFS 
       
        IFS=
        ' ' 
       
        cd 
        ${WORKDIR}
        /current 
       
        for 
        host_ip 
        in 
        $user_defined_deploy_targets_host_ip_list;
        do 
       
        for 
        file 
        in 
        ${WORKDIR}
        /current/
        *;
        do 
       
        scp_local_files_to_remote_host ${
        file
        } ${user_defined_deploy_target_host_ip} ${user_defined_project_top_directory_to_target_host} 
       
        done 
       
        done 
       
        cd 
        ${WORKDIR} 
       
        IFS=${saved_IFS} 
       
        # Start service or validate status 
       
        if 
        [[ -e ${WORKDIR}
        /current/bin/startup
        .sh ]]; 
        then 
       
        #                ${WORKDIR}/current/bin/startup.sh restart
       
        ssh_execute_command_on_remote_host $user_defined_deploy_target_host_ip 
        "$user_defined_project_top_directory_to_target_host/bin/startup.sh restart" 
       
        RETVAL=$? 
       
        else 
       
        test 
        -z ${user_defined_docker_container_name} || restart_docker_container ${user_defined_docker_container_name} 
       
        # TODO(Guodong Ding) external health check 
       
        RETVAL=$? 
       
        fi 
       
        # if started ok, then create a workable program to a file 
       
        if 
        [[ ${RETVAL} -
        eq 
        0 ]]; 
        then 
       
        echo_g 
        "Rollback successfully on $user_defined_deploy_targets_host_ip_list! " 
       
        echo_g 
        "Current workable version is $user_input_release_to_rollback" 
       
        cat 
        >${WORKDIR}
        /share/workable_program
        .log <<eof 
       
        ${user_input_release_to_rollback}
       
        eof
       
        fi 
       
        else 
       
        echo_r 
        "The release you want to rollback is not present, Please  try again! " 
       
        fi 
       
        else 
       
        echo_r 
        "Error: Can NOT find workable release version! Please check if it is first deployment! " 
       
        exit 
        1 
       
        fi 
       
        }
       
        function 
        destroy() { 
       
        # echo a Warning message 
       
        echo_y 
        "Warning: This action will destroy all this project, and this is unrecoverable! " 
       
        user_input_answer_want_do_destroy=
        "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):" 
        user_input_answer_want_do_destroy 
       
        case 
        "$user_input_answer_want_do_destroy" 
        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 
        usage(){ 
       
        cat 
        - << eof 
       
        "$WORKDIR/`
        basename 
        $0` deploy              new deploy/ update one remote target host 
       
        "$WORKDIR/`
        basename 
        $0` rollback_manual     rollback to any workable version to one remote target host by manual 
       
        "$WORKDIR/`
        basename 
        $0` deploys             new deploy/ update 
        more 
        then 
        one remote target host 
       
        "$WORKDIR/`
        basename 
        $0` rollbacks           rollback to any workable version to 
        more 
        than one remote target host by manual 
       
        "$WORKDIR/`
        basename 
        $0` backup_manual       backup conf files to 
        local 
        by manual when you add
        /delete/update 
        conf files on remote target host 
       
        eof
       
        }
       
        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 
       
        [ ! -x ${WORKDIR}/`
        basename 
        $0` ] && 
        chmod 
        +x ${WORKDIR}/`
        basename 
        $0` 
       
        [ -n 
        "$header" 
        ] && 
        echo 
        "$header" 
       
        # if exist file '.capistrano_ds_lock', then this is not first deployment, and unset 
       
        if 
        test 
        -f $WORKDIR/.capistrano_ds_lock; 
        then 
       
        unset 
        user_defined_project_conf_directory 
       
        user_defined_project_conf_directory=
        "" 
       
        fi 
       
        if 
        [[ $
        # -ne 1 ]]; then 
       
        ${WORKDIR}/`
        basename 
        $0` help 
       
        exit 
        0 
       
        fi 
       
        case 
        $1 
        in 
       
        deploy) 
       
        deployment_mode=
        "1" 
       
        deploy 
       
        ;; 
       
        rollback) 
       
        rollback 
       
        ;; 
       
        rollback_manual|rollbackup_manual) 
       
        rollback_manual 
       
        ;; 
       
        backup_manual) 
       
        backup_manual 
       
        ;; 
       
        deploys) 
       
        deployment_mode=
        "0" 
       
        deploys; 
       
        ;; 
       
        rollbacks|rollbackups) 
       
        rollbacks 
       
        ;; 
       
        destroy) 
       
        destroy 
       
        ;; 
       
        help|*) 
       
        echo 
        "Usage: $0 {deploy|rollback_manual|deploys|backup_manual} with $0 itself" 
       
        usage 
       
        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
       
        if 
        $DEBUG ; 
        then 
       
        export 
        PS4=$old_PS4 
       
        ${_XTRACE_FUNCTIONS} 
       
        fi

--end--

本文转自 urey_pp 51CTO博客，原文链接：http://blog.51cto.com/dgd2010/1784390，如需转载请自行联系原作者

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