- KVM es un modulo del kernel de linux que permite desde el espacio usuario del SO acceso a las características hardware de virtualizacion del procesador. Las VM corren como procesos corrientes del user-space.
- KVM usa QUEMU para emular hardware I/O.
- El host es administrador atraves del API libvirt (virsh, virt-install virt-clone virt.manager)
- En sistemas ers de disco paravirtualizados virtIO disminuyendo latencia de I/O y aumentando el rendimiento acercándose a niveles bare-metal.
[root@haya1 ~]# virsh pool-list --all
Name State Autostart
-----------------------------------------
abedul_iscsi active yes
abedul_pruebas active yes
default active yes
Encontrar las lun disponibles:
[root@haya1 ~]# virsh vol-list abedul_iscsi
Name Path
-----------------------------------------
unit:0:0:1 /dev/disk/by-path/ip-192.168.202.249:3260-iscsi-iqn.2012-03.es.unican:abedul.kvm-lun-1
unit:0:0:10 /dev/disk/by-path/ip-192.168.202.249:3260-iscsi-iqn.2012-03.es.unican:abedul.kvm-lun-10
unit:0:0:11 /dev/disk/by-path/ip-192.168.202.249:3260-iscsi-iqn.2012-03.es.unican:abedul.kvm-lun-11
unit:0:0:12 /dev/disk/by-path/ip-192.168.202.249:3260-iscsi-iqn.2012-03.es.unican:abedul.kvm-lun-12
unit:0:0:13 /dev/disk/by-path/ip-192.168.202.249:3260-iscsi-iqn.2012-03.es.unican:abedul.kvm-lun-13
unit:0:0:14 /dev/disk/by-path/ip-192.168.202.249:3260-iscsi-iqn.2012-03.es.unican:abedul.kvm-lun-14
unit:0:0:15 /dev/disk/by-path/ip-192.168.202.249:3260-iscsi-iqn.2012-03.es.unican:abedul.kvm-lun-15
unit:0:0:2 /ip-192.168.202.249:3260-iscsi-iqn.2012-03.es.unican:abedul.kvm-lun-2
unit:0:0:20 /dev/disk/by-path/ip-192.168.202.249:3260-iscsi-iqn.2012-03.es.unican:abedul.kvm-lun-20
unit:0:0:21 /dev/disk/by-path/ip-192.168.202.249:3260-iscsi-iqn.2012-03.es.unican:abedul.kvm-lun-21
unit:0:0:3 /dev/disk/by-path/ip-192.168.202.249:3260-iscsi-iqn.2012-03.es.unican:abedul.kvm-lun-3
unit:0:0:4 /dev/disk/by-path/ip-192.168.202.249:3260-iscsi-iqn.2012-03.es.unican:abedul.kvm-lun-4
unit:0:0:5 /dev/disk/by-path/ip-192.168.202.249:3260-iscsi-iqn.2012-03.es.unican:abedul.kvm-lun-5
unit:0:0:6 /dev/disk/by-path/ip-192.168.202.249:3260-iscsi-iqn.2012-03.es.unican:abedul.kvm-lun-6
unit:0:0:9 /dev/disk/by-path/ip-192.168.202.249:3260-iscsi-iqn.2012-03.es.unican:abedul.kvm-lun-9
[root@haya1 ~]# virsh vol-info /dev/disk/by-path/ip-192.168.202.249:3260-iscsi-iqn.2012-03.es.unican:abedul.kvm-lun-6
Name: unit:0:0:6
Type: block
Capacity: 50.00 GiB
Allocation: 50.00 GiB
[root@haya1 ~]# virsh vol-dumpxml /dev/disk/by-path/ip-192.168.202.249:3260-iscsi-iqn.2012-03.es.unican:abedul.kvm-lun-6
<volume>
<name>unit:0:0:6</name>
<key>1IET_00010006</key>
<source>
</source>
<capacity unit='bytes'>53687091200</capacity>
<allocation unit='bytes'>53687091200</allocation>
<target>
<path>/dev/disk/by-path/ip-192.168.202.249:3260-iscsi-iqn.2012-03.es.unican:abedul.kvm-lun-6</path>
<format type='unknown'/>
<permissions>
<mode>0660</mode>
<owner>0</owner>
<group>0</group>
</permissions>
<timestamps>
<atime>1495200423.370916984</atime>
<mtime>1495200422.018916984</mtime>
<ctime>1495200422.229916984</ctime>
</timestamps>
</target>
</volume>
