DRBD configuration

Solution 1:

No, it's not possible. A non-cluster file system can only be used by one machine at a time and if you use it in dual-primary mode on more than one machine, filesystem corruption is guaranteed!

The reason is that the two machines using this filesystem will not know which modification the other makes and there will be conflicts pretty soon.

Solution 2:

Short answer: It is possible but ill advised.

Longer answer: ext2, ext3, and ext4 filesystems do not provide the locking or coordination needed to handle cases where the file system is being written to by more than one host. These file systems were designed to be written to by only one host. If multiple hosts attempt to write to the same file system, none will have an accurate map of the filesystem and will end up overwriting data from the other host.

It is possible to mount the volume read-only on additional hosts but remember there is no way for host1 to tell host2 that the data has been changed.

The reason for distributed lock managers and other communication channels used by cluster file systems is to allow the hosts to inform each other of writes in progress and prevent the behavior mentioned above.

Good Luck, Rik