As a website administrator who deeply understands the operation of AnQiCMS, I fully understand that every detail in the system maintenance and upgrade process may affect the stable operation of the website and the user experience.The upgrade of the content management system, especially the replacement of the core service process, is a critical link that requires careful operation.start.shThe behavior pattern of the script under the condition that the old process has not completely stopped is a focus for many operation personnel.
AnQiCMS as an efficient content management system built on the Go language, its deployment method usually includes a set of simple start and stop scripts, aiming to simplify daily operations.These scripts are the core of system service management, responsible for checking the status of the AnQiCMS process and performing the corresponding start or stop.start.shWhen the script runs, it does not blindly start new service instances, but follows a set of predefined logic to judge the current running status of the system.
In-depth analysisstart.shThe internal mechanism of the script, where we can see a key check step. The script will utilizeps -efcommands combinedgrepto scan all running processes in the current system, looking for any that matchanqicmsExecutable file name matching process. Subsequently,wc -lThe command will count the number of matched processes. This number determines the next action of the script.
The core judgment logic of this script is:if [ $exists -eq 0 ]; then ... fiThis means that only whenexiststhe variable (i.e., the count of the AnQiCMS process) is strictly equal to zero, the script will enter the body of the conditional statement and executenohup $BINPATH/$BINNAME >> $BINPATH/running.log 2>&1 &This command is used to start a new AnQiCMS instance. In other words,start.shThe design purpose of the script is to ensure that only one AnQiCMS instance is running in the system, and the service is only started when no instance is running.
Therefore, when AnQiCMS is upgraded and the operations personnel replace theanqicmsexecutable file but fail to stop the old AnQiCMS process in a timely or correct manner, thestart.shThe script will present a specific behavior pattern. At this time,ps -efthe command will detect the still active old AnQiCMS process, makingexiststhe value of the variable greater than zero (usually 1). BecauseexistsNot equal to zero.if [ $exists -eq 0 ]This condition judgment will be false.
In this case,start.shThe script will not execute the command to start a new AnQiCMS instance.It will simply perform process checks and log relevant information (if the script logging feature is enabled), and then exit without taking any action to start a new process.start.shThe website will continue to be served by the old version AnQiCMS process that has not been stopped.All new features, performance optimizations, or security patches brought by the upgrade will not take effect because they exist in new files, and the process corresponding to the new files has not been started.This state may cause operators to be confused about the behavior of the website after the upgrade, such as finding that the expected new features have not been launched, or that reported vulnerabilities have not been fixed.
To ensure that AnQiCMS can run the new version correctly after the upgrade, the key is to performstart.shBefore that, be sure to usestop.shScript or manually terminate all old AnQiCMS processes. Only when there are no old AnQiCMS processes left in the system environment,start.shcan the detection be performed.existsThis is the state of being zero, and the AnQiCMS service is successfully started with the latest version. This is a necessary step to ensure the success of the upgrade and an important practice to maintain the healthy operation of the system.
Common Questions (FAQ)
Q1: Why did I upgrade AnQiCMS, but the website functionality did not update to the latest version?start.shThis is likely because you ran the script after upgrading AnQiCMS.
A1:This is very likely because you ran the script in the context of AnQiCMS.start.shBefore the script, the old version of AnQiCMS service process was not completely stopped.start.shThe design mechanism of the script will first check if there is an AnQiCMS process running in the system.If any existing processes are detected, it will not start a new AnQiCMS instance.This means that your website is still being served by the old version of AnQiCMS process, so the new features or fixes brought by the upgrade have not taken effect.
Q2: How to ensure that the new version can be correctly started during the upgrade of AnQiCMS, and avoid interference from the old process?
A2:The key to ensure the correct startup of the new version lies in strictly following the service stop steps in the upgrade process. After replacing the AnQiCMS executable file, you should first usestop.shThe script to stop all running AnQiCMS processes. After confirming that the old processes have been completely terminated, execute the script.start.sh.start.shIt will detect that there are no active AnQiCMS processes and will smoothly start the new version service that you just upgraded.
Q3:start.shThe script will automatically stop the old AnQiCMS process to start a new version?
A3:No, according tostart.shThe internal logic of the script, which will not automatically stop any running old AnQiCMS processes.Its only task is to check if there is an AnQiCMS process running, and if not, start a new process.If a process is detected, it will exit directly without performing any operation.stop.shStopping the old process is your responsibility to ensure that the new version can be smoothly started.