PowerFlex How to change the umask values on PFMP hosts for default permission

Summary: The issue occurs during PowerFlex Manager Platform (PFMP) cluster deployments where the customer security standards do not allow to use of the default UMASK value to 0022 and it is changed to some other value. CMO needs UMASK 022 for the helm charts to be set up. ...

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Instructions

The issue system has UMASK value 027:

  •     New files were created with 640 permission.
  •     Newly created directories with 750 permissions 

 

To understand with which permissions files and directories are made when umask is set to 027, simply subtract that value from the default permissions Linux sets for files and directories before umask, which is 666 for files and 777 for directories.

  • New files: 666 - 027 = 640
  • New directories: 777 - 027 = 750

Because of this setting, all helm image has 640 permissions inside PVC.

To change UMASK to 0022:

1. Update the UMASK value.

vi /etc/login.defs
   Update the line UMASK 027 ---> UMASK 022
   save it.

2. Load the configuration:

   source /etc/profile

3. Exit from the shell and re-login 
The latest configuration is updated.
#Testing: if you create any new file, it is created with 644 permissions
 

Affected Products

PowerFlex rack, PowerFlex Appliance, PowerFlex Software
Article Properties
Article Number: 000217888
Article Type: How To
Last Modified: 09 Jun 2025
Version:  2
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