In the daily operation of AnQiCMS, the stable operation of the system is the key to ensuring user experience and content distribution efficiency.To ensure that AnQiCMS service can provide content continuously and uninterruptedly, even if it encounters unexpected interruptions, a meticulously designed startup script plays a crucial role in the scheduled tasks.start.shThis script is born for this, it constitutes the core of AnQiCMS service self-defense mechanism.
start.shThe core function of the script
start.shThe main function of the script is to monitor the running status of the AnQiCMS application and ensure that it runs continuously in the specified path.In short, it is a lightweight daemon script that regularly checks if the AnQiCMS main program is alive.Once the service stops running, it will immediately attempt to restart the program to minimize service interruption time and ensure the continuous accessibility of the website.This mechanism is crucial for enhancing the robustness and automated operation capabilities of AnQiCMS, especially suitable for small and medium-sized enterprises with limited resources and self-media operators. It can maintain the online status of services without complex manual intervention.
Analysis of the working principle of the script
This documentstart.shThe script implements its functionality through a series of standard Bash commands. The script first defines two key variables:BINNAME(The name of the AnQiCMS executable program, default isanqicms) andBINPATH
The core logic of the script lies in a conditional judgment: it usesps -ef | grep '\<anqicms\>' | grep -v grep | wc -la command chain to check if a process namedanqicmsexists in the system.ps -efList all processes,grep '\<anqicms\>'Filter out processes related to AnQiCMS\<\>Used for precise matching to prevent matching other unrelated processes that contain the word 'anqicms').grep -v grepExclude it.grepThe process itself, lastwc -lCount the number of lines that meet the conditions, that is, the number of running AnQiCMS processes.
If the detection results indicate that the number of AnQiCMS processes is zero (i.e.exists -eq 0），The script will judge that AnQiCMS 'is not running'. At this time, it will executecd $BINPATH && nohup $BINPATH/$BINNAME >> $BINPATH/running.log 2>&1 &command to start AnQiCMS.nohupCommand ensures that the AnQiCMS program continues to run in the background even if the terminal session is closed.>> $BINPATH/running.log 2>&1Then, redirect the standard output and standard error of the program torunning.logIn the file, for subsequent log analysis and fault diagnosis. The entire startup process is performed asynchronously in the background to avoid blocking the script execution.
For easy tracking, the script will also record the results of each check and the startup attempts.$BINPATH/check.logIn the file, detailed records of the time and process status are provided, which offers valuable audit clues to operations personnel.
Integration with AnQiCMS scheduled tasks
start.shThe script is usually configured for the Linux system.crontabSchedule tasks to run automatically at fixed time intervals (e.g., once a minute).Through this method, the AnQiCMS service can achieve nearly real-time fault recovery capabilities.Once the program crashes for any reason (such as memory overflow, code error, external attack, or system resource exhaustion, etc.), the scheduled task will detect it within a short time and restart it, greatly improving the availability of the service.This automated management approach is a manifestation of AnQiCMS's 'lightweight and efficient' operation philosophy, allowing users to focus more on content creation and business development rather than being exhausted by technical issues.
Common Questions and Answers (FAQ)
1. Ifstart.shThe script is not working as expected, how should I troubleshoot the problem?First, checkBINPATHandBINNAMEWhether the variable is correctly configured in the script, ensure that they point to the actual path and name of the AnQiCMS executable program. Next, checkcheck.logThe file can be used to understand the execution history and process detection results of the script, which can help judge whether the script has been scheduled correctly and whether there are any problems with its detection logic. Ifrunning.logThere is content, checking the error information may reveal the cause of the startup failure of the AnQiCMS program. Finally, you can try to execute manually./start.shObserve the output, or use it directly on the serverps -ef | grep anqicmsCheck the process status manually with the command.
2. Whystart.shDoes the script need to run every minute? Will this frequency consume too many system resources?tostart.shSet to run every minute to achieve fast fault recovery. If the AnQiCMS service unfortunately crashes, it can be detected and automatically restarted no later than one minute.start.shIt is a very lightweight script, mainly performing process checks and simple file I/O operations, with negligible resource consumption.Only when AnQiCMS is not running, will it attempt to start the program truly, thus this frequency will not impose a significant burden on system resources, and it is an effective strategy to ensure high availability of the service.
3. When deploying multiple AnQiCMS instances on the same server,start.shwhat are the points that need special attention in the script?When running multiple AnQiCMS instances on the same server, each instance needs to have its independentstart.shscript (or parameterized call to the main script), and each script inBINNAMEandBINPATHThe variable must point to each independent AnQiCMS executable program and its installation path. In addition, each AnQiCMS instance also needs to be inconfig.jsonConfigure a unique running port and correctly map it in reverse proxy such as Nginx.Ensure that each instance's script, binary file, configuration file, and log file are independent of each other to avoid conflicts and confusion.