[virt-tools-list] under virt-manager, can't create a new VM instance from ISO image

[Qiubo Su (David Su)]

dear community,

i can't use virt-manager to create a new VM instance. below is the steps i
went through and the problems i got:

1) run virt-manager to create a new VM with name test
2) select "local install media (iso image ......)"
3) browse to import ubuntu iso from local harddisk
......
4)
a) if under "Advanced options", select "Virtual network 'default' :
NAT(inactive)", then click Finish, got "Virtual Network is not active.
Virtual Network 'default' is not active. Would you like to start the
network now?", clidk Yes, got "Could not start virtual network 'default':
internal error Network is already in use by interface br0"
b) if under "Advanced options", select "specify shared device name" and set
"bridge name:" br0, then click Finish, got "Unable to complete install:
'internal error Process exited while reading console log output: char
device redirected to /dev/pts/3
kvm: -drive
file=/home/var/libvirt/images/test.img,if=none,id=drive-ide0-0-0,format=raw:
could not open disk image /home/var/libvirt/images/test.img: Permission
denied"

5) cancel the current new VM creation, then go to the /var/lib/images/, run
"chmod 644 test.img", and then run "chown oneadmin test.img", then start to
create a new VM again through "import existing disk image" option

6)
a) if under "Advanced options", select "Virtual network 'default' :
NAT(inactive)", then click Finish, got "Virtual Network is not active.
Virtual Network 'default' is not active. Would you like to start the
network now?", clidk Yes, got "Could not start virtual network 'default':
internal error Network is already in use by interface br0"
b) if under "Advanced options", select "specify shared device name" and set
"bridge name:" br0, then click Finish, can start to boot into the VM
instance, but got "No bootable device" error.

in virt-manager, all the other steps when creating a new VM instance are
default.

as the errors shown in above, why it can't create a new VM instance from
ISO image? why it can't create a new VM instance from the RAW image in
local harddisk either? have anyone happened to these problem when creating
new VM instance with virt-manager?

it is much appreciated if anyone can help with this?

thanks,
david su
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