After upgrading AnQiCMS, will the PID of the old process be automatically updated, or do I need to handle it manually?
As an experienced operator of AnQi CMS, I am well aware of the importance of system upgrades for maintaining website security and advanced functionality.When performing the AnQiCMS upgrade operation, many users have a core question: Will the old program process identifier (PID) be automatically updated after the upgrade?Or should we intervene manually?
AnQiCMS is an enterprise-level content management system developed based on the Go language, one of its core features is to run as an independent executable binary file.This means that when you start AnQiCMS, it will create one or more independent processes on the server.Each running program instance is assigned a unique process ID, known as PID.This PID is the key used by the operating system to identify and manage the process.
When performing AnQiCMS system upgrade, it is usually necessary to download and replace the old executable files, or update the program files through the background online upgrade feature.However, the running instance of the program (i.e., the old process) will not automatically perceive that the underlying executable file has been updated.The operating system only knows that there is a process running a specific file.In order for the new program logic to take effect, the old process must be terminated, and then the new, updated executable file can be started, thereby generating a new process and a new PID.Therefore, the answer is clear: After the upgrade of AnQiCMS, the PID of the old process will not be automatically updated, but needs to be terminated manually or semi-automatically, and then a new process needs to be started, which naturally leads to the release of the old PID and the allocation of a new PID.
This process management method requires operators to make explicit interventions during the upgrade process.Whether through the command line, Baota panel, Docker management tool, or other methods, the core steps are to "stop" the existing service and then "start" the new service.This ensures that the website is running the latest version of AnQiCMS code.
In a Linux server environment, AnQiCMS usually recommends usingstart.shandstop.shscripts to manage processes. Among them,start.shThe design logic of the script is to check if AnQiCMS is running, and if not, to start it. It does not have the ability to restart a running process. Andstop.shThe script is explicitly passedkill -9The command terminates the existing process, thus releasing its PID. Therefore, the standard practice in the upgrade scenario is to first executestop.shTerminate the currently running AnQiCMS process, and then execute after the program files are updated.start.shStart a new AnQiCMS process.
For users who deploy using Baota panel (such as its Go project features) or Docker, the process of process management seems more automated, but the underlying principle is still to stop old processes and start new processes.For example, in the Docker environment, updating the AnQiCMS image and restarting the container essentially involves destroying the old container (and its old processes and PID), and then creating a new container (with its new processes and PID).The Baota panel's Go project management feature also provides convenient 'stop' and 'start' options, and these operations are executed in the background with similar logic.In the document, it also clearly guides users to 'first stop the project using the scheduled task, then delete the scheduled task', and then 'start adding as a Go project according to...method', all of which prove the necessity of manually intervening in the process to update the PID.For operations in the Windows environment, the document also clearly states that it is necessary to manually "end tasks" through the Task Manager to terminate old processes.
In summary, after the upgrade, the PID of the old process in AnQiCMS will not be automatically updated.Each upgrade is accompanied by the termination of the old process and the launch of a new one, thus generating a new PID.This is a necessary operation to ensure system integrity and the normal loading of new features.As a website operator, understanding and correctly executing this process is the key to ensuring the stable operation of AnQiCMS.
Frequently Asked Questions (FAQ)
Q: Why doesn't AnQiCMS have 'hot update' or automatic restart like some other services?A: AnQiCMS runs as a standalone binary file compiled in Go language, its design pattern determines that the program cannot replace its core code at runtime.To load new program logic, it is necessary to terminate the current running instance and start a new instance containing updated code. This is a common deployment mode for Go applications, aimed at simplifying deployment and avoiding complex runtime code replacement mechanisms.
Q: What will happen if I do not manually restart AnQiCMS after the upgrade?A: If you do not manually restart the AnQiCMS service after the upgrade, your website will continue to run the old version of the program code.This means that all feature improvements, security patches, or bug fixes in the new version will not take effect.The website may not be able to access new features, and unknown errors may occur due to incompatibility with the new file structure.
Q: Is manually handling PID updates by stopping and then starting the Go project feature in the Baota panel considered manual processing?A: Yes. Although the Baota panel provides a one-click operation interface, the essence of its 'stop' and 'start' Go project functions is to execute the termination of the old process (i.e., its PID) and the start of a new process in the background.This belongs to a convenient manual intervention, rather than the program's own PID automatic update.