Update acls.md

acls.md

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 # ACLs
 
+ACLs are the permissions for your users or groups. The ACLs view can be accessed in the "Settings".
+
+1. Select the user or group you want to apply permissions on it
+2. Select the object on which the permission will apply
+3. Choose the role for this ACL
+4. Click on "Create"
+
+![](createacl.png)
+
+> Pro tip: you can click to add multiple objects at the same time!
+
+Your ACL is now available in the right list:
+
+![](acllist.png)
+
+You can edit/remove existing ACLs here.
+
+## Roles
+
+There is 3 different roles for your users:
+
+* Admin
+* Operator
+* Viewer
+
+### Admin
+
+An object admin can do everything on it, even destroy it. E.g with its admin VM:
+
+* create a new VM
+* remove it
+* migrate it (to a host with admin permission on it)
+* modify the VM resources, name and description
+* clone it
+* copy it
+* convert it into a template
+* snapshot it (even revert from a snapshot)
+* export it
+* attach/add visible disks
+* same for network cards
+
+### Operator
+
+An operator can make everyday operations on assigned objects. E.g on a VM:
+
+* eject a CD
+* insert a CD (if he can view the ISO storage repository)
+* start, restart, shutdown, suspend/resume it
+
+All other operations are forbidden.
+
+### Viewer
+
+A viewer can only access the object console (if any) and see the object metrics. That's all!
+
+## Inheritance
+
+Objects have a hierarchy: a Pool contains all its hosts, containing itself all its VMs.
+
+If you give a *view* permission to a user (or a group) on a pool, he will automatically see all the objects inside this pool (SRs, hosts, VMs).
+
+## Examples
+
+### Allow a user to install an OS
+
+If the OS install needs a ISO, you need to give this user 2 permissions:
+
+* *Operate* on the VM (e.g to start it)
+* *View* on the ISO Storage containing the needed ISO.
+
+### Console only
+
+If you want to give your user access to the VM console only, the *View* permission is enough.