我在用着桉树在 Ubuntu 10.04 上设置私有云。有时我无法通过 ssh 访问虚拟机实例,但我希望能够直接连接到虚拟机实例的控制台。然而,默认情况下,这似乎不能通过 virsh 工作:
$ sudo virsh -c qemu:///system console i-486B085E
No console available for domain
有没有某种方法可以实现这一点,例如,通过更改 Eucalyptus 生成传递给 libvirt 的 XML 文件的方式?
这是 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>
这是 virsh dumpxml 的输出:
$ 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>
以下是最终调用的完整 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:交叉发布自服务器故障因为尚不支持问题迁移。
答案1
我想通了...您需要编辑 /usr/share/eucalyptus/gen_kvm_libvirt_xml 文件。这是差异:
--- /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>
(也在服务器故障上回答)。