Kvm
通過 Eucalyptus 啟動映像時使用 virsh 連接到 KVM 實例？
我在 Ubuntu 10.04 上使用Eucalyptus來設置私有云。有時我無法通過 ssh 連接到 VM 實例，我希望能夠直接連接到 VM 實例的控制台。但是，預設情況下，這似乎不適用於 virsh：
$ sudo virsh -c qemu:///system console i-486B085E No console available for domain有沒有辦法實現這一點，例如，通過改變 Eucalyptus 生成傳遞給 libvirt 的 XML 文件的方式？
這是 Eucalyptus 生成的 libvirt.xml 文件：
$ cat /var/lib/eucalyptus/instances/admin/i-486B085E/libvirt.xml <domain type='kvm'> <name>i-486B085E</name> <os> <type>hvm</type> <kernel>/var/lib/eucalyptus/instances//admin/i-486B085E/kernel</kernel> <initrd>/var/lib/eucalyptus/instances//admin/i-486B085E/ramdisk</initrd> <cmdline>root=/dev/sda1 console=ttyS0</cmdline> </os> <features> <acpi/> </features> <memory>262144</memory> <vcpu>1</vcpu> <devices> <disk type='file'> <source file='/var/lib/eucalyptus/instances//admin/i-486B085E/disk'/> <target dev='sda'/> </disk> <interface type='bridge'> <source bridge='eucabr10'/> <mac address='d0:0d:48:6B:08:5E'/> <model type='e1000'/> </interface> <serial type="file"> <source path='/var/lib/eucalyptus/instances//admin/i-486B085E/console.log'/> <target port='1'/> </serial> </devices> </domain>這是 virsh dumpxml 的輸出：
$ sudo virsh dumpxml i-486B085E <domain type='kvm' id='3'> <name>i-486B085E</name> <uuid>3b762376-4de1-f6ac-7327-9df520fa4862</uuid> <memory>262144</memory> <currentMemory>262144</currentMemory> <vcpu>1</vcpu> <os> <type arch='x86_64' machine='pc-0.12'>hvm</type> <kernel>/var/lib/eucalyptus/instances//admin/i-486B085E/kernel</kernel> <initrd>/var/lib/eucalyptus/instances//admin/i-486B085E/ramdisk</initrd> <cmdline>root=/dev/sda1 console=ttyS0</cmdline> <boot dev='hd'/> </os> <features> <acpi/> </features> <clock offset='utc'/> <on_poweroff>destroy</on_poweroff> <on_reboot>restart</on_reboot> <on_crash>destroy</on_crash> <devices> <emulator>/usr/bin/kvm</emulator> <disk type='file' device='disk'> <source file='/var/lib/eucalyptus/instances//admin/i-486B085E/disk'/> <target dev='sda' bus='scsi'/> </disk> <interface type='bridge'> <mac address='d0:0d:48:6b:08:5e'/> <source bridge='eucabr10'/> <target dev='vnet0'/> <model type='e1000'/> </interface> <serial type='file'> <source path='/var/lib/eucalyptus/instances//admin/i-486B085E/console.log'/> <target port='0'/> </serial> <console type='file'> <source path='/var/lib/eucalyptus/instances//admin/i-486B085E/console.log'/> <target port='0'/> </console> </devices> <seclabel type='dynamic' model='apparmor'> <label>libvirt-3b762376-4de1-f6ac-7327-9df520fa4862</label> <imagelabel>libvirt-3b762376-4de1-f6ac-7327-9df520fa4862</imagelabel> </seclabel> </domain>這是最終被呼叫的完整 KVM 命令行：
/usr/bin/kvm -S -M pc-0.12 -enable-kvm -m 256 -smp 1 -name i-486B085E -uuid 3b762376-4de1-f6ac-7327-9df520fa4862 -nographic -chardev socket,id=monitor,path=/var/lib/libvirt/qemu/i-486B085E.monitor,server,nowait -monitor chardev:monitor -boot c -kernel /var/lib/eucalyptus/instances//admin/i-486B085E/kernel -initrd /var/lib/eucalyptus/instances//admin/i-486B085E/ramdisk -append root=/dev/sda1 console=ttyS0 -drive file=/var/lib/eucalyptus/instances//admin/i-486B085E/disk,if=scsi,index=0,boot=on -net nic,macaddr=d0:0d:48:6b:08:5e,vlan=0,model=e1000,name=e1000.0 -net tap,fd=55,vlan=0,name=tap.0 -chardev file,id=serial0,path=/var/lib/eucalyptus/instances//admin/i-486B085E/console.log -serial chardev:serial0 -parallel none -usb注意：由於尚不支持問題遷移，因此從serverfault交叉發布。
我想通了…您需要編輯 /usr/share/eucalyptus/gen_kvm_libvirt_xml 文件。這是差異：
--- /usr/share/eucalyptus/gen_kvm_libvirt_xml.bak 2010-09-28 14:54:20.259266161 -0400 +++ /usr/share/eucalyptus/gen_kvm_libvirt_xml 2010-09-28 15:01:25.269265897 -0400 @@ -109,9 +109,9 @@ <mac address='PRIVMACADDR'/> <model type='e1000'/> </interface> - <serial type="file"> - <source path='BASEPATH/console.log'/> - <target port='1'/> + <serial type='pty'> + <source path='/dev/pts/2'/> + <target port='0'/> </serial> </devices> </domain>（也在伺服器故障上回答）。