您好：
你说的cloudstack 用户虚拟机的img 镜像是放在主存储在没错，但是cloudstack 系统VM是放在KVM宿主机上的。
下面是我找到的过程：
但是 cloudstack + kvm（libvirt） 是使用kvm (libvirt)作为虚拟机支撑，是在宿主机上是有一个XML文件（虚拟机的描述文件）
我要找的就是这个文件，我想通过此XML来查看cloudstack 产生的两个系统VM 的一些信息（如网卡配置，USB配置等），现在我找到的，
其目录是在/var/run/libvirt/qemu 下。如
[root@agent-kvm qemu]# ls
s-93-VM.pid s-93-VM.xml v-94-VM.pid v-94-VM.xml
如
s-93-VM.xml 文件内容如下，如果你对 KVM 很熟悉的话，就可以看到这个cloudstack 系统VM 的各种配置。
当然，有时部署碰到 系统VM 无法创建成功，就是因为 /var/lib/libvirt/qemu/ 下有一些没清除的内容，造成的。
如下面的XML
文件，就很清楚的告诉你，cloudstack系统VM是没放在主存储上，而放在宿主机上的目录：'/mnt/b3628db3-e670-34e4-bcbf-d194b8075c9a/048dd252-5db4-4ed6-b9df-52b858ed0a3d'/
<!--
WARNING: THIS IS AN AUTO-GENERATED FILE. CHANGES TO IT ARE LIKELY TO BE
OVERWRITTEN AND LOST. Changes to this xml configuration should be made using:
virsh edit s-93-VM
or other application using the libvirt API.
-->
<domstatus state='running' reason='booted' pid='8381'>
<taint flag='high-privileges'/>
<monitor path='/var/lib/libvirt/qemu/s-93-VM.monitor' json='1' type='unix'/>
<vcpus>
<vcpu pid='8466'/>
</vcpus>
<qemuCaps>
<flag name='vnc-colon'/>
<flag name='no-reboot'/>
<flag name='drive'/>
<flag name='name'/>
<flag name='uuid'/>
<flag name='vnet-hdr'/>
<flag name='migrate-qemu-tcp'/>
<flag name='migrate-qemu-exec'/>
<flag name='drive-cache-v2'/>
<flag name='kvm'/>
<flag name='drive-format'/>
<flag name='vga'/>
<flag name='0.10'/>
<flag name='pci-device'/>
<flag name='mem-path'/>
<flag name='drive-serial'/>
<flag name='migrate-qemu-unix'/>
<flag name='chardev'/>
<flag name='enable-kvm'/>
<flag name='monitor-json'/>
<flag name='balloon'/>
<flag name='device'/>
<flag name='smp-topology'/>
<flag name='netdev'/>
<flag name='rtc'/>
<flag name='vhost-net'/>
<flag name='no-kvm-pit'/>
<flag name='tdf'/>
<flag name='pci-configfd'/>
<flag name='nodefconfig'/>
<flag name='boot-menu'/>
<flag name='name-process'/>
<flag name='drive-readonly'/>
<flag name='smbios-type'/>
<flag name='vga-qxl'/>
<flag name='spice'/>
<flag name='vga-none'/>
<flag name='migrate-qemu-fd'/>
<flag name='boot-index'/>
<flag name='hda-duplex'/>
<flag name='drive-aio'/>
<flag name='pci-multibus'/>
<flag name='pci-bootindex'/>
<flag name='ccid-passthru'/>
<flag name='chardev-spicevmc'/>
<flag name='virtio-tx-alg'/>
<flag name='device-qxl-vga'/>
<flag name='pci-multifunction'/>
<flag name='virtio-blk-pci.ioeventfd'/>
<flag name='sga'/>
<flag name='virtio-blk-pci.event_idx'/>
<flag name='virtio-net-pci.event_idx'/>
<flag name='piix3-usb-uhci'/>
<flag name='piix4-usb-uhci'/>
<flag name='usb-ehci'/>
<flag name='ich9-usb-ehci1'/>
<flag name='usb-redir'/>
<flag name='usb-hub'/>
<flag name='no-shutdown'/>
<flag name='cache-unsafe'/>
<flag name='rombar'/>
<flag name='no-acpi'/>
<flag name='virtio-blk-pci.scsi'/>
<flag name='blk-sg-io'/>
<flag name='drive-copy-on-read'/>
<flag name='cpu-host'/>
<flag name='system_wakeup'/>
<flag name='scsi-disk.channel'/>
<flag name='scsi-block'/>
<flag name='block-job-async'/>
<flag name='scsi-cd'/>
<flag name='hda-micro'/>
<flag name='dump-guest-memory'/>
<flag name='balloon-event'/>
<flag name='virtio-scsi-pci'/>
<flag name='blockio'/>
<flag name='disable-s3'/>
<flag name='disable-s4'/>
<flag name='usb-redir.filter'/>
<flag name='ide-drive.wwn'/>
<flag name='scsi-disk.wwn'/>
<flag name='reboot-timeout'/>
<flag name='dump-guest-core'/>
<flag name='seamless-migration'/>
<flag name='disable-ksm'/>
<flag name='virtio-net-pci.__com_redhat_macvtap_compat'/>
<flag name='qxl'/>
<flag name='VGA'/>
<flag name='cirrus-vga'/>
<flag name='ipv6-migration'/>
</qemuCaps>
<domain type='kvm' id='4'>
<name>s-93-VM</name>
<uuid>14bbc1df-9578-38b4-928f-237f353547cf</uuid>
<description>Debian GNU/Linux 5.0 (32-bit)</description>
<memory unit='KiB'>262144</memory>
<currentMemory unit='KiB'>262144</currentMemory>
<vcpu placement='static'>1</vcpu>
<cputune>
<shares>500</shares>
</cputune>
<os>
<type arch='x86_64' machine='rhel6.4.0'>hvm</type>
<boot dev='cdrom'/>
<boot dev='hd'/>
</os>
<features>
<acpi/>
<apic/>
<pae/>
</features>
<clock offset='utc'/>
<on_poweroff>destroy</on_poweroff>
<on_reboot>restart</on_reboot>
<on_crash>destroy</on_crash>
<devices>
<emulator>/usr/libexec/qemu-kvm</emulator>
<disk type='file' device='disk'>
<driver name='qemu' type='qcow2' cache='none'/>
<source
file='/mnt/b3628db3-e670-34e4-bcbf-d194b8075c9a/048dd252-5db4-4ed6-b9df-52b858ed0a3d'/>
<target dev='vda' bus='virtio'/>
<alias name='virtio-disk0'/>
<address type='pci' domain='0x0000' bus='0x00' slot='0x07'
function='0x0'/>
</disk>
<disk type='file' device='disk'>
<driver name='qemu' type='raw' cache='none'/>
<source
file='/mnt/b3628db3-e670-34e4-bcbf-d194b8075c9a/s-93-VM-patchdisk'/>
<target dev='vdb' bus='virtio'/>
<alias name='virtio-disk1'/>
<address type='pci' domain='0x0000' bus='0x00' slot='0x08'
function='0x0'/>
</disk>
<disk type='file' device='cdrom'>
<driver name='qemu' type='raw' cache='none'/>
<source file='/usr/share/cloudstack-common/vms/systemvm.iso'/>
<target dev='hdc' bus='ide'/>
<readonly/>
<alias name='ide0-1-0'/>
<address type='drive' controller='0' bus='1' target='0' unit='0'/>
</disk>
<controller type='usb' index='0'>
<alias name='usb0'/>
<address type='pci' domain='0x0000' bus='0x00' slot='0x01'
function='0x2'/>
</controller>
<controller type='ide' index='0'>
<alias name='ide0'/>
<address type='pci' domain='0x0000' bus='0x00' slot='0x01'
function='0x1'/>
</controller>
<interface type='bridge'>
<mac address='0e:00:a9:fe:01:84'/>
<source bridge='cloud0'/>
<target dev='vnet0'/>
<model type='virtio'/>
<alias name='net0'/>
<address type='pci' domain='0x0000' bus='0x00' slot='0x03'
function='0x0'/>
</interface>
<interface type='bridge'>
<mac address='06:d8:a6:00:01:18'/>
<source bridge='cloudbr0'/>
<target dev='vnet1'/>
<model type='virtio'/>
<alias name='net1'/>
<address type='pci' domain='0x0000' bus='0x00' slot='0x04'
function='0x0'/>
</interface>
<interface type='bridge'>
<mac address='06:67:44:00:00:9b'/>
<source bridge='cloudbr0'/>
<target dev='vnet2'/>
<model type='virtio'/>
<alias name='net2'/>
<address type='pci' domain='0x0000' bus='0x00' slot='0x05'
function='0x0'/>
</interface>
<interface type='bridge'>
<mac address='06:d1:e6:00:01:02'/>
<source bridge='cloudbr0'/>
<target dev='vnet3'/>
<model type='virtio'/>
<alias name='net3'/>
<address type='pci' domain='0x0000' bus='0x00' slot='0x06'
function='0x0'/>
</interface>
<serial type='pty'>
<source path='/dev/pts/7'/>
<target port='0'/>
<alias name='serial0'/>
</serial>
<console type='pty' tty='/dev/pts/7'>
<source path='/dev/pts/7'/>
<target type='serial' port='0'/>
<alias name='serial0'/>
</console>
<input type='tablet' bus='usb'>
<alias name='input0'/>
</input>
<input type='mouse' bus='ps2'/>
<graphics type='vnc' port='5901' autoport='yes' listen='0.0.0.0'>
<listen type='address' address='0.0.0.0'/>
</graphics>
<video>
<model type='cirrus' vram='9216' heads='1'/>
<alias name='video0'/>
<address type='pci' domain='0x0000' bus='0x00' slot='0x02'
function='0x0'/>
</video>
<memballoon model='virtio'>
<alias name='balloon0'/>
<address type='pci' domain='0x0000' bus='0x00' slot='0x09'
function='0x0'/>
</memballoon>
</devices>
<seclabel type='none'/>
</domain>
</domstatus>
cloudstackfqa2013
发件人： wanghaicheng2...@126.com
发送时间： 2013-12-05 17:05
收件人： users-cn; cloudstackfqa2013
主题： 回复: 回复: 请问cloudstack + KVM 部署好后，创建的系统VM与用户VM都放在哪个目录下
兄弟，如果CS没有启用本地存储，那么VM应该是存放到主存储中的，可以通过数据库查询相应的虚拟机的保存位置。只有当你玩单机的KVM时，你的VM默认才在你说的那个目录下
wanghaicheng2...@126.com
发件人： cloudstackfqa2013
发送时间： 2013-12-05 16:59
收件人： users-cn
主题： 回复: 请问cloudstack + KVM 部署好后，创建的系统VM与用户VM都放在哪个目录下
您好：
我找到了，给自己顶一下。
cloudstackfqa2013
发件人： cloudstackfqa2013
发送时间： 2013-12-05 16:51
收件人： users-cn
主题： 请问cloudstack + KVM 部署好后，创建的系统VM与用户VM都放在哪个目录下
您好：
请问cloudstack + KVM 部署好后，创建的系统VM与用户VM都放在哪个目录下 ，
玩过KVM 的人都知道，KVM 产生的虚拟机是在 /var/lib/libvirt/qemu 或
/etc/libvirt/qemu 下有XML文件的对应的虚拟机。
请问cloudstack + KVM 创建的VM 在哪个目录呢？
cloudstackfqa2013
