Linux Shell腳本之遠端自動化部署java maven項目

腳本功能：

檢查運作環境（包括運作權限、網絡、DNS解析等），自動從git上擷取java maven項目工程源碼，在機器A上build，build完成後，備份機器B上原有的配置檔案（如果存在），将Class、Lib檔案和備份的配置檔案等上傳到機器B，重新啟動機器B上的服務以便變更生效。

腳本特點：

1.（與之前的自動部署腳本相比）全新優化了腳本代碼，更friendly，結構更緊湊、邏輯更加嚴謹

2.Public header删除了無用或者不好用的有色彩顯示函數，并修正了WORKDIR不是絕對路徑可能導緻的bug

3.修正了域名解析判斷是否正常的一個bug，該bug可能導緻遇到無法解析後不斷嘗試解析

4.全新的通用main函數，自帶檔案鎖和自動接受處理INT、TERM、EXIT程序信号，整個腳本更加的子產品化和标準化

5.針對項目方面，增加了對java項目配置檔案的備份和還原功能，增加了對docker容器的支援

使用辦法：

将腳本上傳到Linux任意目錄，至少修改三個變量（分别是項目源碼的git位址、部署對象的IP、部署對象的目标目錄）：

<code>project_clone=</code><code>"ssh://git@xxx/xxx.git"</code>

<code>deploy_target_host_ip=</code><code>"xxx.xxx.xxx.xxx"</code>

<code>project_top_directory_to_target_host=</code><code>"/path/to/deploy/project"</code>

如果此項目依賴于其他項目，則修改“project_clone_depends_1”變量，如果要想使部署後自動生效，則，可以将啟動腳本放在項目git源碼下的bin目錄下，預設名稱為“startup.sh”

如果此項目部署在目标主機的docker容器内，則修改“docker_container_name”變量，以便重新開機容器生效。

多個容器啟動的依賴關系的處理已經在TODO計劃中。

首次執行需要将配置檔案準确的寫入項目檔案中，一次寫入後期無須修改，如需修改，直接修改部署對象主機上的配置檔案即可。

在任意位置使用下方指令運作即可，腳本一旦運作一次，自動添加可執行權限，無須手動添加。

腳本内容：

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<code># Name: doDeploy.sh</code>

<code>#Execute this shell script to deploy Java projects built by Maven automatically on remote hosts.</code>

<code># debug option</code>

<code>#_XTRACE_FUNCTIONS=$(set +o | grep xtrace)</code>

<code>#set -o xtrace</code>

<code># define user friendly messages</code>

<code>header="</code>

<code>Function: Execute this shell script to deploy Java projects built by Maven automatically on remote hosts.</code>

<code>License: Open </code><code>source</code> <code>software</code>

<code># define variables</code>

<code># Where to get source code</code>

<code>project_clone_depends_1=</code><code>""</code>

<code>docker_container_name=</code><code>""</code>

<code># Setting how many days do you want save old releases, default is 10 days</code>

<code>save_old_releases_for_days=10</code>

<code># end define variables</code>

<code># pretreatment</code>

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

<code>project_clone_target=</code><code>"`echo ${project_clone} | awk -F '[/.]+' '{ print $(NF-1)}'`"</code>

<code>project_clone_repository_name=${project_clone_target}</code>

<code># end pretreatment</code>

<code># Public header</code>

<code># resolve links - $0 may be a symbolic link</code>

<code># learn from apache-tomcat-6.x.xx/bin/catalina.sh</code>

<code>while</code> <code>[ -h </code><code>"$PRG"</code> <code>]; </code><code>do</code>

<code> </code><code>PRG=`</code><code>dirname</code> <code>"$PRG"</code><code>`/</code><code>"$link"</code>

<code># Get standard environment variables</code>

<code>PRGDIR=`</code><code>dirname</code> <code>"$PRG"</code><code>`</code>

<code># echo color function, smarter, learn from lnmp.org lnmp install.sh</code>

<code>function</code> <code>echo_r (){</code>

<code> </code><code># Color red: Error, Failed</code>

<code> </code><code>[ $</code><code># -ne 1 ] && return 1</code>

<code>function</code> <code>echo_g (){</code>

<code> </code><code># Color green: Success</code>

<code>function</code> <code>echo_y (){</code>

<code> </code><code># Color yellow: Warning</code>

<code>function</code> <code>echo_b (){</code>

<code> </code><code># Color blue: Debug, friendly prompt</code>

<code># end echo color function, smarter</code>

<code>#WORKDIR="`realpath ${WORKDIR}`"</code>

<code>WORKDIR=</code><code>"`readlink -f ${PRGDIR}`"</code>

<code># end public header</code>

<code>LOGNAME=</code><code>"$USER"</code>

<code> </code><code>echo</code> <code>"WARNING: Running as a non-root user, \"$LOGNAME\". Functionality may be unavailable. Only root can use some commands or options"</code>

<code>command_exists() {</code>

<code> </code><code># which "$@" >/dev/null 2>&1</code>

<code> </code><code>command</code> <code>-</code><code>v</code> <code>"$@"</code> <code>></code><code>/dev/null</code> <code>2>&1</code>

<code>check_command_can_be_execute(){</code>

<code> </code><code>command_exists $1</code>

<code>check_network_connectivity(){</code>

<code> </code><code>echo_b </code><code>"checking network connectivity ... "</code>

<code> </code><code>network_address_to_check=8.8.4.4</code>

<code> </code><code>stable_network_address_to_check=114.114.114.114</code>

<code> </code><code>ping_count=2</code>

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

<code> </code><code>retval=$?</code>

<code> </code><code>if</code> <code>[ ${retval} -</code><code>ne</code> <code>0 ] ; </code><code>then</code>

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

<code> </code><code>echo_g </code><code>"Network to $stable_network_address_to_check succeed! "</code>

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

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

<code> </code><code>echo_r </code><code>"Network is unreachable, gateway is not set."</code>

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

<code> </code><code>echo_r </code><code>"Network is unreachable, gateway is unreachable."</code>

<code> </code><code>echo_r </code><code>"Network is blocked! "</code>

<code> </code><code>elif</code> <code>[ ${retval} -</code><code>eq</code> <code>0 ]; </code><code>then</code>

<code> </code><code>echo_g </code><code>"Check network connectivity passed! "</code>

<code>check_name_resolve(){</code>

<code> </code><code>echo_b </code><code>"checking DNS name resolve ... "</code>

<code> </code><code>target_name_to_resolve=</code><code>"github.com"</code>

<code> </code><code>stable_target_name_to_resolve=</code><code>"www.aliyun.com"</code>

<code> </code><code>ping_count=1</code>

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

<code> </code><code>echo_y </code><code>"Name lookup failed for $target_name_to_resolve with $ping_count times "</code>

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

<code> </code><code>echo_g </code><code>"Name lookup success for $stable_target_name_to_resolve with $ping_count times "</code>

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

<code> </code><code>if</code> <code>test</code> <code>${eval_md5sum_of_nameserver_config} = </code><code>"674ea91675cdfac353bffbf49dc593c3"</code><code>; </code><code>then</code>

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

<code> </code><code>return</code> <code>0</code>

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

<code> </code><code>cat</code> <code>></code><code>/etc/resolv</code><code>.conf<<eof</code>

<code>nameserver 114.114.114.114</code>

<code>nameserver 8.8.4.4</code>

<code> </code><code>check_name_resolve</code>

<code> </code><code>echo_g </code><code>"Check DNS name resolve passed! "</code>

<code> </code><code>return</code> <code>0</code>

<code>function</code> <code>checkOtherDependencies() {</code>

<code> </code><code>echo_b </code><code>"Checking other dependencies for deploy procedure... "</code>

<code> </code><code>echo_b </code><code>"\tChecking user customized variables..."</code>

<code> </code><code># Refer:</code>

<code> </code><code># echo "var is unset"; else echo "var is set to '$var'"</code>

<code> </code><code># echo "var is empty"; else echo "var is set to '$var'"</code>

<code> </code><code>if</code> <code>[[ -z ${project_clone} ]]; </code><code>then</code>

<code> </code><code>echo_r </code><code>"Error: project_clone is undefined! "</code>

<code> </code><code>elif</code> <code>[[ -z ${deploy_target_host_ip} ]]; </code><code>then</code>

<code> </code><code>echo_r </code><code>"Error: deploy_target_host_ip is undefined! "</code>

<code> </code><code>elif</code> <code>[[ -z ${project_top_directory_to_target_host} ]]; </code><code>then</code>

<code> </code><code>echo_r </code><code>"Error: project_top_directory_to_target_host is undefined! "</code>

<code> </code><code>echo_g </code><code>"\tChecking user customized variables passed! "</code>

<code> </code><code>echo_b </code><code>"\tChecking disk space available..."</code>

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

<code> </code><code>if</code> <code>[[ ${disk_space_available} -lt 2097152 ]]; </code><code>then</code>

<code> </code><code>echo_y </code><code>"Warning: Disk space of $WORKDIR is smaller than 2GB"</code>

<code> </code><code>echo_g </code><code>"\tChecking disk space available passed! "</code>

<code> </code><code>echo_g </code><code>"All required dependencies check passed! "</code>

<code>function</code> <code>setDirectoryStructureOnLocalHost() {</code>

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

<code> </code><code>echo_g </code><code>"Set directory structure has been done, skipping. "</code>

<code> </code><code>return</code>

<code> </code><code>echo_b </code><code>"Setting directory structure... "</code>

<code> </code><code># learn from capistrano</code>

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

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

<code> </code><code># ├── current -> /var/www/my_app_name/releases/20150120114500/</code>

<code> </code><code># ├── releases</code>

<code> </code><code># ├── revisions.log</code>

<code> </code><code># └── shared</code>

<code> </code><code># 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.</code>

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

<code> </code><code># 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.).</code>

<code> </code><code># 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.</code>

<code> </code><code># 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.</code>

<code> </code><code># 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.</code>

<code> </code><code># Check directories for deploy</code>

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

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

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

<code> </code><code># end directories structure</code>

<code> </code><code># Additional directories structure for full deploy operation</code>

<code> </code><code># for backup remote host config file</code>

<code> </code><code>[ ! -d ${WORKDIR}</code><code>/backup</code> <code>] && </code><code>mkdir</code> <code>${WORKDIR}</code><code>/backup</code>

<code> </code><code># set a directories structure lock</code>

<code> </code><code>touch</code> <code>${WORKDIR}/.capistrano_ds_lock</code>

<code> </code><code>echo_g </code><code>"Set directory structure successfully! "</code>

<code>function</code> <code>cleanOldReleases(){</code>

<code> </code><code>save_days=${save_old_releases_for_days:-10}</code>

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

<code> </code><code>echo_b </code><code>"Can NOT find release directory, skipping . "</code>

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

<code> </code><code>if</code> <code>[ ! -z ${need_clean} ]; </code><code>then</code>

<code> </code><code>echo_g </code><code>"Expired releases found and will be removed from project! "</code>

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

<code> </code><code>echo_g </code><code>"Expired releases have removed from project! "</code>

<code> </code><code>echo_r </code><code>"Can NOT remove expired releases, please alter to Admin users. "</code>

<code> </code><code>echo_g </code><code>"All releases are not expired, skipping. "</code>

<code># git_project_clone repository branch</code>

<code>function</code> <code>git_project_clone(){</code>

<code> </code><code>set</code> <code>-o errexit</code>

<code> </code><code>[ $</code><code># -ge 1 ] && project_clone_repository="$1"</code>

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

<code> </code><code>project_clone_directory=${WORKDIR}</code><code>/repository/</code><code>${project_clone_repository_name}</code>

<code> </code><code>branch=</code><code>"$2"</code>

<code> </code><code>branch=</code><code>"develop"</code>

<code> </code><code>if</code> <code>test</code> <code>! -d ${project_clone_directory}; </code><code>then</code>

<code> </code><code>echo_b </code><code>"git clone from $project_clone_repository"</code>

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

<code> </code><code># TODO(Guodong Ding) get branch names or revision numbers from VCS data</code>

<code> </code><code>cd</code> <code>${project_clone_directory}</code>

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

<code> </code><code>echo_g </code><code>"git clone from $project_clone_repository successfully! "</code>

<code> </code><code>echo_b </code><code>"git pull from $project_clone_repository"</code>

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

<code> </code><code># TODO(Guodong Ding) get branch names or revision numbers from VCS data</code>

<code> </code><code>echo_g </code><code>"git pull from $project_clone_repository successfully! "</code>

<code> </code><code>set</code> <code>+o errexit</code>

<code>function</code> <code>maven_build_project_deprecated(){</code>

<code> </code><code>echo_b </code><code>"Do mvn build java project... "</code>

<code> </code><code>check_command_can_be_execute mvn</code>

<code> </code><code>cd</code> <code>${project_clone_directory}</code>

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

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

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

<code>function</code> <code>maven_build_project(){</code>

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

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

<code> </code><code>echo_g </code><code>"mvn install for ${project_clone_repository_name} successfully! "</code>

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

<code> </code><code>echo_g </code><code>"mvn clean package for ${project_clone_repository_name} successfully! "</code>

<code> </code><code>echo_g </code><code>"Do mvn build java project finished for ${project_clone_repository_name} with exit code 0! "</code>

<code>function</code> <code>check_ssh_can_be_connect(){</code>

<code> </code><code>echo_b </code><code>"Check if can ssh to remote host $1 ... "</code>

<code> </code><code>check_command_can_be_execute </code><code>ssh</code> <code>|| </code><code>return</code> <code>1</code>

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

<code> </code><code>echo_r </code><code>"Check ssh to remote host $1 failed! "</code>

<code> </code><code>echo_g </code><code>"Check ssh to remote host $1 successfully! "</code>

<code># ssh_execute_command_on_remote_host hostname command</code>

<code>function</code> <code>ssh_execute_command_on_remote_host(){</code>

<code> </code><code>[ $</code><code># -ne 2 ] && return 1</code>

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

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

<code> </code><code>return</code> <code>1</code>

<code> </code><code>echo_g </code><code>"ssh execute command on remote host $2 successfully! "</code>

<code>function</code> <code>restart_docker_container(){</code>

<code> </code><code>echo_b </code><code>"Restarting docker container..."</code>

<code> </code><code># TODO(Guodong Ding) if we need restart more related docker container</code>

<code> </code><code>local</code> <code>docker_container_name=</code><code>""</code>

<code> </code><code>test</code> <code>-n $1 && docker_container_name=</code><code>"$1"</code>

<code> </code><code>ssh_execute_command_on_remote_host </code><code>"docker restart $docker_container_name"</code>

<code> </code><code>echo_r </code><code>"restart docker container for $docker_container_name failed! "</code>

<code> </code><code>echo_g </code><code>"restart docker container for $docker_container_name successfully! "</code>

<code># scp_local_files_to_remote_host local_path remote_hostname remote_path</code>

<code>function</code> <code>scp_local_files_to_remote_host(){</code>

<code> </code><code>[ $</code><code># -ne 3 ] && return 1</code>

<code> </code><code>[ ! -d $1 -a ! -f $1 ] && </code><code>return</code> <code>1</code>

<code> </code><code>check_ssh_can_be_connect $2</code>

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

<code> </code><code>echo_r </code><code>"scp local files to remote host failed! "</code>

<code> </code><code>echo_g </code><code>"scp local files to remote host successfully! "</code>

<code># scp_remote_files_to_local_host remote_hostname remote_path local_path</code>

<code>function</code> <code>scp_remote_files_to_local_host(){</code>

<code> </code><code>check_ssh_can_be_connect $1</code>

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

<code> </code><code>echo_r </code><code>"scp remote files to local host failed! "</code>

<code> </code><code>echo_g </code><code>"scp remote files to local host successfully! "</code>

<code>function</code> <code>backup_remote_host_config_files(){</code>

<code> </code><code>echo_b </code><code>"backup remote host config files..."</code>

<code> </code><code>scp_remote_files_to_local_host ${deploy_target_host_ip} ${project_top_directory_to_target_host}/* ${WORKDIR}</code><code>/backup</code>

<code> </code><code># get config files</code>

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

<code> </code><code># remove empty directory</code>

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

<code> </code><code># TODO(Guodong Ding) improvements here</code>

<code> </code><code>echo_g </code><code>"backup remote host config files finished."</code>

<code>function</code> <code>rollback_remote_host_config_files(){</code>

<code> </code><code>echo_b </code><code>"rollback remote host config files..."</code>

<code> </code><code>#scp_local_files_to_remote_host ${WORKDIR}/backup ${deploy_target_host_ip} ${project_top_directory_to_target_host}</code>

<code> </code><code>saved_IFS=$IFS</code>

<code> </code><code>cd</code> <code>${WORKDIR}</code><code>/current</code>

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

<code> </code><code>scp_local_files_to_remote_host ${</code><code>file</code><code>} ${deploy_target_host_ip} ${project_top_directory_to_target_host}</code>

<code> </code><code>cd</code> <code>${WORKDIR}</code>

<code> </code><code>IFS=${saved_IFS}</code>

<code> </code><code># TODO(Guodong Ding) if save remote host config files</code>

<code> </code><code>echo_g </code><code>"rollback remote host config files finished."</code>

<code>function</code> <code>deploy() {</code>

<code> </code><code>[ -n </code><code>"$header"</code> <code>] && </code><code>echo</code> <code>"$header"</code>

<code> </code><code># check a directories lock, Note: this is redundant</code>

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

<code> </code><code>setDirectoryStructureOnLocalHost</code>

<code> </code><code>cleanOldReleases</code>

<code> </code><code># do dependencies checking</code>

<code> </code><code>check_network_connectivity</code>

<code> </code><code>checkOtherDependencies</code>

<code> </code><code>check_ssh_can_be_connect ${deploy_target_host_ip}</code>

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

<code> </code><code>test</code> <code>-z ${project_clone_depends_1} || git_project_clone </code><code>"$project_clone_depends_1"</code>

<code> </code><code>git_project_clone </code><code>"$project_clone"</code>

<code> </code><code>test</code> <code>-z ${project_clone_depends_1} || maven_build_project </code><code>"$project_clone_depends_1"</code>

<code> </code><code>maven_build_project </code><code>"$project_clone"</code>

<code> </code><code># links_target_directory_to_current</code>

<code> </code><code># Make directory to release directory</code>

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

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

<code># test -f ${WORKDIR}/.capistrano_ds_lock && \rm -rf ${WORKDIR}/.capistrano_ds_lock</code>

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

<code> </code><code>[ ! -d ${new_release_just_created} ] && </code><code>mkdir</code> <code>${new_release_just_created}</code>

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

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

<code> </code><code># Make source code symbolic link to current</code>

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

<code> </code><code>ln</code> <code>-s ${new_release_just_created} ${WORKDIR}</code><code>/current</code>

<code> </code><code># backup remote host config files</code>

<code> </code><code>backup_remote_host_config_files</code>

<code># scp_local_files_to_remote_host ${WORKDIR}/current/ ${deploy_target_host_ip} ${project_top_directory_to_target_host}</code>

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

<code> </code><code># rollback remote host config files</code>

<code> </code><code>rollback_remote_host_config_files</code>

<code> </code><code># Move conf and logs directives from release to share</code>

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

<code> </code><code>[ -d ${WORKDIR}</code><code>/release/logs</code> <code>] && </code><code>mv</code> <code>${WORKDIR}</code><code>/release/logs</code> <code>${WORKDIR}</code><code>/share/logs</code>

<code> </code><code># Make conf and logs symbolic link to current</code>

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

<code> </code><code>[ -d ${WORKDIR}</code><code>/share/logs</code> <code>] && </code><code>ln</code> <code>-s ${WORKDIR}</code><code>/share/logs</code> <code>${WORKDIR}</code><code>/current/logs</code>

<code> </code><code># Start service or validate status</code>

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

<code> </code><code>${WORKDIR}</code><code>/current/bin/startup</code><code>.sh start</code>

<code> </code><code>RETVAL=$?</code>

<code> </code><code># TODO(Guodong Ding) external health check</code>

<code> </code><code>test</code> <code>-z ${docker_container_name} || restart_docker_container ${docker_container_name}</code>

<code> </code><code># if started ok, then create a workable program to a file</code>

<code> </code><code>if</code> <code>[[ ${RETVAL} -</code><code>eq</code> <code>0 ]]; </code><code>then</code>

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

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

<code>${new_release_just_created}</code>

<code> </code><code>echo_g </code><code>"Deploy successfully! "</code>

<code> </code><code>echo_g </code><code>"current workable version is $(cat ${WORKDIR}/share/workable_program.log)"</code>

<code># ls --color=auto -l ${WORKDIR}/current</code>

<code># ls --color=auto -l ${WORKDIR}/current/</code>

<code> </code><code>echo_r </code><code>"Error: Deploy failed! "</code>

<code> </code><code>${WORKDIR}/`</code><code>basename</code> <code>$0` rollback</code>

<code># Rollback to last right configuration</code>

<code>function</code> <code>rollback() {</code>

<code> </code><code>echo_b </code><code>"Rollback to last right configuration... "</code>

<code> </code><code># The key is find last files which can work</code>

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

<code> </code><code>if</code> <code>[[ -z ${WORKABLE_PROGRAM} ]]; </code><code>then</code>

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

<code> </code><code># Stop service if we have</code>

<code> </code><code>${WORKDIR}</code><code>/current/bin/startup</code><code>.sh stop</code>

<code> </code><code># Remove failed deploy</code>

<code> </code><code>rm</code> <code>-rf ${WORKDIR}</code><code>/current</code>

<code> </code><code># Remake source code symbolic link to current</code>

<code> </code><code>ln</code> <code>-s ${WORKABLE_PROGRAM} ${WORKDIR}</code><code>/current</code>

<code> </code><code># Remake conf and logs symbolic link to current</code>

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

<code> </code><code>[ -d ${WORKDIR}</code><code>/share/logs</code> <code>] && </code><code>ln</code> <code>-s ${WORKDIR}</code><code>/share/logs</code> <code>${WORKDIR}</code><code>/current</code>

<code> </code><code>echo_g </code><code>"Rollback successfully! "</code>

<code> </code><code>echo_g </code><code>"current workable version is $WORKABLE_PROGRAM"</code>

<code># ls --color=auto -l ${WORKDIR}/current</code>

<code>function</code> <code>destroy() {</code>

<code> </code><code># echo a Warning message</code>

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

<code> </code><code>answer=</code><code>"n"</code>

<code> </code><code>echo_y </code><code>"Do you want to destroy this project? "</code>

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

<code> </code><code>case</code> <code>"$answer"</code> <code>in</code>

<code> </code><code># delete all file expect for this script self</code>

<code> </code><code># 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''.</code>

<code> </code><code># echo $WORKDIR/</code>

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

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

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

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

<code> </code><code># ls | grep -v "filename" | xargs rm -rf</code>

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

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

<code> </code><code>echo_g </code><code>"Destroy this project successfully! Now will exit with status 0. "</code>

<code> </code><code>echo_r </code><code>"Error: something go wrong! Please check or alter to Admin user! "</code>

<code> </code><code>echo_g </code><code>"destroy action is cancel"</code>

<code> </code><code>echo_r </code><code>"Are you kidding me? You are a bad kid! "</code>

<code>function</code> <code>main(){</code>

<code> </code><code>lock_filename=</code><code>"lock_$$_$RANDOM"</code>

<code># lock_filename_full_path="/var/lock/subsys/$lock_filename"</code>

<code> </code><code>lock_filename_full_path=</code><code>"/var/lock/$lock_filename"</code>

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

<code> </code><code>trap</code> <code>'rm -f "$lock_filename_full_path"; exit $?'</code> <code>INT TERM EXIT</code>

<code> </code><code># Just a test for call itself, comment it</code>

<code># $0 deploy</code>

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

<code> </code><code>${WORKDIR}/`</code><code>basename</code> <code>$0` deploy</code>

<code> </code><code>deploy)</code>

<code> </code><code>deploy</code>

<code> </code><code>rollback)</code>

<code> </code><code>rollback</code>

<code> </code><code>destroy)</code>

<code> </code><code>destroy</code>

<code> </code><code>echo</code> <code>"Usage: $0 {deploy|rollback|destroy} with $0 itself"</code>

<code> </code><code>rm</code> <code>-f </code><code>"$lock_filename_full_path"</code>

<code> </code><code>echo</code> <code>"Failed to acquire lock: $lock_filename_full_path"</code>

<code> </code><code>echo</code> <code>"held by $(cat ${lock_filename_full_path})"</code>

<code>#${_XTRACE_FUNCTIONS}</code>

運作效果：

可以嘗試使用Chrome浏覽器打開該頁面，右鍵單擊，選擇“在新标簽頁中打開圖檔”檢視清晰大圖。

推薦Windows使用者使用PyCharm（5.0.x）結合Bash Support插件編輯bash shell script檔案。

注：由于該腳本的大幅度更新，是以最新的運作效果圖可以自行運作觀察。

--end--

本文轉自 urey_pp 51CTO部落格，原文連結：http://blog.51cto.com/dgd2010/1771555，如需轉載請自行聯系原作者

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