Bool function in PHP to check if you run the script inside docker

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I had to do a CLI script that does something, I also had to add a validation that checks if it runs inside the Docker. After a research I found a solution that people check some processes via cat /proc/self/cgroup and then grep to search for a docker phrase within.



So I ended with thin method. It works pretty well. Inside docker it returns true, on my local mac it returns false.



It's not a rocket science however I would like people to take a look and tell me if this is a sufficient method or a completely different approach is better.



private function isDocker(): bool

 $processStack = explode(PHP_EOL, shell_exec('cat /proc/self/cgroup'));
 $processStack = array_filter($processStack); // remove empty item made by EOL

 foreach ($processStack as $process) 
 if (strpos($process, 'docker') === false) 
 return false;
 
 

 return true;



Later call to this script looks like:



if ($this->isDocker() === false) 
 throw new Exception('This helper script can be called only inside Docker container.' . "n");




php




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    up vote
    1
    down vote

    favorite












    I had to do a CLI script that does something, I also had to add a validation that checks if it runs inside the Docker. After a research I found a solution that people check some processes via cat /proc/self/cgroup and then grep to search for a docker phrase within.



    So I ended with thin method. It works pretty well. Inside docker it returns true, on my local mac it returns false.



    It's not a rocket science however I would like people to take a look and tell me if this is a sufficient method or a completely different approach is better.



    private function isDocker(): bool

     $processStack = explode(PHP_EOL, shell_exec('cat /proc/self/cgroup'));
     $processStack = array_filter($processStack); // remove empty item made by EOL

     foreach ($processStack as $process) 
     if (strpos($process, 'docker') === false) 
     return false;
     
     

     return true;



    Later call to this script looks like:



    if ($this->isDocker() === false) 
     throw new Exception('This helper script can be called only inside Docker container.' . "n");




    php




    share|improve this question





















      up vote
      1
      down vote

      favorite









      up vote
      1
      down vote

      favorite











      I had to do a CLI script that does something, I also had to add a validation that checks if it runs inside the Docker. After a research I found a solution that people check some processes via cat /proc/self/cgroup and then grep to search for a docker phrase within.



      So I ended with thin method. It works pretty well. Inside docker it returns true, on my local mac it returns false.



      It's not a rocket science however I would like people to take a look and tell me if this is a sufficient method or a completely different approach is better.



      private function isDocker(): bool

       $processStack = explode(PHP_EOL, shell_exec('cat /proc/self/cgroup'));
       $processStack = array_filter($processStack); // remove empty item made by EOL

       foreach ($processStack as $process) 
       if (strpos($process, 'docker') === false) 
       return false;
       
       

       return true;



      Later call to this script looks like:



      if ($this->isDocker() === false) 
       throw new Exception('This helper script can be called only inside Docker container.' . "n");




      php




      share|improve this question











      I had to do a CLI script that does something, I also had to add a validation that checks if it runs inside the Docker. After a research I found a solution that people check some processes via cat /proc/self/cgroup and then grep to search for a docker phrase within.



      So I ended with thin method. It works pretty well. Inside docker it returns true, on my local mac it returns false.



      It's not a rocket science however I would like people to take a look and tell me if this is a sufficient method or a completely different approach is better.



      private function isDocker(): bool

       $processStack = explode(PHP_EOL, shell_exec('cat /proc/self/cgroup'));
       $processStack = array_filter($processStack); // remove empty item made by EOL

       foreach ($processStack as $process) 
       if (strpos($process, 'docker') === false) 
       return false;
       
       

       return true;



      Later call to this script looks like:



      if ($this->isDocker() === false) 
       throw new Exception('This helper script can be called only inside Docker container.' . "n");





      php





      share|improve this question










      share|improve this question




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      asked Aug 1 at 22:31









      slick

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