If this message should go elsewhere, my apologies.
It would be great if QEMU have the capability of detachable overlay or
union mount.
So administrators can keep each software as separate individual qcow2/qed
disks and can put those disks on different layers so that the end user
would see combination of the softwares available to them.
The desired scenario is like the following:-
-- --------------------
----------------------- ----------------------
User1 Disk (RW) User2 Disk (RW) \
User3 Disk (RW)
----------------------- \
---------------------- \
-----------------------
| \ |
\ |
| \ |
\ |
| \ |
\ |
------------------------- \
---------------------- \
----------------------
Software 1 Disk \ Software 2 Disk
\ Software 3 Disk
(Read Only) \ (Read Only)
\ (Read Only)
--------------------------
-----------------------
----------------------
---------------------------
--------------------------
------------------------
(Hostname (VM1) (Hostname (VM2)
(Hostname (VM3)
IP Address IP Address
IP Address
Unique Data) Disk Unique Data) Disk
Unique Data) Disk
(Read Only) (Read Only)
/ (Read Only)
---------------------------
--------------------------- /
--------------------------
\ |
/
\ |
/
\ |
/
\ |
/
\ ---------------------------------------
/
\ | OS Updates Disk 2(RO) | /
\ -
--------------------------------------- /
\ | OS Updates Disk 1 (RO)
| /
\
-----------------------------------------
/
\ | Base VM Image (RO) |/
---------------------------
To User1:-
To User2:- To
User3:-
Hostname: - VM1 H
ostname:-VM2
Hostname:-VM3
Software Installed: - Software1+Software2 Software
Installed: - Software2+Software3 Software Installed:-
Software3
Writable Disk:- User1 Disk Writable
Disk:- User2 Disk Writable Disk:-
User3 Disk
Please let me know if the above scenario is possible utilizing QEMU.
