How do GlusterFS permissions work on Linux

glusterfspermissions

I'm putting together a horizontally scaled Apache/GluserFS setup. I'm trying to figure out how Gluster deals with permissions. I'm going to have several hosts reading and writing to the Gluster File System. I understand the basics of Linux file system permissions (ugo/rwe). I want to give one user (actually one user per host) certain file system permissions.

Basically, I want to give the www-data user (and only the www-data) on each host read/write permissions on the GlusterFS backed web directory tree. Is this possible? Are Gluster file permission based on the name, or the user ID?

Best Answer

From their FAQ GlusterFS is fully POSIX complaint

So you should be able to setup the permissions as you normally would. On linux permissions are based on user id (UID) and group id (GID), which you could check with something like ls -ln the '-n' will return the numerical vaules instead of the 'username'.

Related Solutions

Linux – How to Set Up Permissions for the WWW Folder

After more research it seems like another (possibly better way) to answer this would be to setup the www folder like so.

sudo usermod -a -G developer user1 (add each user to developer group)
sudo chgrp -R developer /var/www/site.com/ so that developers can work in there
sudo chmod -R 2774 /var/www/site.com/ so that only developers can create/edit files (other/world can read)
sudo chgrp -R www-data /var/www/site.com/uploads so that www-data (apache/nginx) can create uploads.

Since git runs as whatever user is calling it, then as long as the user is in the "developer" group they should be able to create folders, edit PHP files, and manage the git repository.

Note: In step (3): '2' in 2774 means to 'set Group ID' for the directory. This causes new files and sub directories created within it to inherit the group ID of the parent directory (instead of the primary group of the user) Reference: http://en.wikipedia.org/wiki/Setuid#setuid_and_setgid_on_directories

Ubuntu Apache2 PHP execute permissions

Every time you want to execute a script you should add excecute permission:

chmod +x /path/name/of/your/script

Best Answer

Related Solutions

Linux – How to Set Up Permissions for the WWW Folder

Ubuntu Apache2 PHP execute permissions

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