Hello! As a senior security CMS website operation personnel, I fully understand how important it is to have a clear grasp of the underlying operation mechanism when managing the system.start.shin the scriptBINNAMEVariables seem simple, but they play a core role in the process recognition and stable operation of Anqi CMS. Below, I will elaborate on the impact of this variable on process recognition.
BINNAMEVariable is instart.shThe impact of script on process recognition
The operation of AnQi CMS depends on a daemon scriptstart.shIts main purpose is to ensure that the security CMS service can run stably and continuously.This script's core function is to accurately identify whether there is an AnQi CMS process running at the moment so as to decide whether to start a new process or maintain the existing one.BINNAMEThe variable is the key to realizing this process recognition.
Instart.shIn the script,BINNAMEThe variable is assigned the name of the executable file of Anqí CMS, usually defaulting toanqicmsThe script will then useps -ef | grep '\<${BINNAME}\>'Such a command combination is used to query all running processes in the system and filter out those that matchBINNAMEthe defined name. Here is thegrep '\<${BINNAME}\>'expression in.\<and\>Punctuation is crucial, it indicates word boundaries and ensuresgrepThe command will only match the complete executable file name and not any other string containing the name, thereby improving the accuracy of identification. Following that,grep -v grepis to excludegrepProcess generated by the command itself, avoid misjudgment.
Therefore,BINNAMEThe accuracy of the variable directly determinesstart.shWhether the script can correctly identify the operation status of Anqi CMS.
IfBINNAMEThe value of the variable is exactly the same as the executable file name of the actual AnQi CMS running,start.shThe script can accurately determine whether the service is online. When the script detects no matching process, it will executenohup $BINPATH/$BINNAME >> $BINPATH/running.log 2>&1 &Command, successfully started Anqi CMS service.On the other hand, if the service is already running, the script will identify the existing process and skip the steps of repeated startup to avoid unnecessary resource consumption and potential port conflicts.
However, onceBINNAMEThe variable setting does not match the actual executable file name, which will have a serious impact on the process management of Anqi CMS. For example, if we rename the executable file of Anqi CMS tomycmsHoweverstart.shin the scriptBINNAMEThe variable still retains asanqicmsThen when the script runs, it will not be able to find the process namedanqicmsThis will lead to two main problems:
On the one hand, if the Anqi CMS service has actually already been runningmycmsin the background, by the name ofstart.shThe script incorrectly assumes that the service has not started and tries to execute the start command again.This will cause the system to attempt to start a second safe CMS instance on the same port, which is very likely to cause a port conflict, leading to the failure of the newly started instance, and may even affect the normally running services, causing system instability.
On the other hand, if the Anqicms CMS service has stopped running for some reason and its executable file name ismycmsbut the script still searches foranqicmsthenstart.shUnable to identify the non-running status of the service.It incorrectly assumes that the service is running, therefore it will not trigger a restart operation, leading to the website being inaccessible for a long time, directly affecting the availability of the website.
When managing multiple sites or custom deploying an AnQi CMS,BINNAMEThe correct configuration of variables is particularly crucial. The document explicitly states that when installing multiple secure CMS instances on the same server, each instance's executable file should be renamed to a different name, such astaobaokeAt the same time, the name corresponding to each instance must be updated in sync with thestart.shin the scriptBINNAMEvariables as well asgrepthe name in the command to ensure that each instance can be uniquely identified.start.shThe script correctly identifies and manages, avoiding interference. This refined process identification mechanism is the cornerstone for the stable and efficient operation of Anqi CMS in complex deployment environments.
Frequently Asked Questions (FAQ)
Ask: If I change the executable filename of Anqi CMS but forget to updatestart.shin the scriptBINNAMEthe variable, what will happen?
Answer: This will lead tostart.shScript cannot correctly identify your Anqi CMS process.If the AnQi CMS has already been run with a new filename, the script will mistakenly believe that the service has not started and will try to start a new process again, which usually leads to port conflicts and resource waste.If the Anqi CMS service is not running, the script also cannot detect its stopped state, thus unable to automatically restart the service, which may cause the website to remain offline for a long time.
Ask: When deploying multiple AnQi CMS instances on the same server,BINNAMEwhat special requirements do variables configuration have?
Answer: When you deploy multiple AnQi CMS instances on the same server, each instance must have a unique executable file name, and each instance should have its own independentstart.shScript. In eachstart.shScript, itsBINNAMEThe value of the variable and the internal scriptgrepThe executable file name referenced by the command must match the executable file name of the corresponding AnQi CMS instance.This ensures that each instance's process can be accurately identified by its corresponding management script, achieving independent and stable operation.
Ask: Whystart.shExcept for the identification process of the script,grep '\<${BINNAME}\>'will still usegrep -v grep?
Answer:grep '\<${BINNAME}\>'The command is used to filter out processes named withBINNAMEvariable matching. However, executinggrepThe command itself will also generate agrepprocess, and this process will also includeBINNAMEThe represented string (because it is searching for this string). To preventgrepThe process of issuing the command itself is misidentified as the main process of Anqicms, the script will usegrep -v grepRemove all process lines containing the string 'grep' to ensure that only the actual Anqi CMS application processes are counted, improving the accuracy of process identification.