問題與解決

1. 問題一：virt-install 安裝虛擬機時出現以下錯誤訊息：
   

   ERROR    internal error Process exited while reading console log output:\
    char device redirected to /dev/pts/8 open /dev/kvm: Permission denied
   

2. 解決方式：
   1. 重新載入 kvm_intel 及 kvm 模組，重點是將 /dev/kvm 的群組改為 kvm。
      

      [root@dywH ~]# rmmod kvm_intel
      [root@dywH ~]# rmmod kvm
      [root@dywH ~]# modprobe kvm
      [root@dywH ~]# modprobe kvm_intel
      [root@dywH ~]# chown root:kvm /dev/kvm
      

   2. 如果重開機後還是出現同樣的問題，查看 /dev/kvm 開機後群組還是 root。

      [root@dywH ~]# ll /dev/kvm
      crw-rw----+ 1 root root 10, 232 Aug 27 06:23 /dev/kvm
      

   3. 原因為 /etc/udev/rules.d/80-kvm.rules 不存在，編輯此檔。

      [root@dywH ~]# vim /etc/udev/rules.d/80-kvm.rules
      [root@dywH ~]# cat /etc/udev/rules.d/80-kvm.rules
      KERNEL=="kvm", GROUP="kvm", MODE="0666"
      

   4. 不必重開機，重新驅動 udev。

      [root@dywH ~]# udevadm trigger
      

   5. 再查看 /dev/kvm，群組已改為 kvm。

      [root@dywH ~]# ll /dev/kvm
      crw-rw-rw-+ 1 root kvm 10, 232 Aug 27 06:33 /dev/kvm
      

   6. /etc/udev/rules.d/80-kvm.rules 屬於 qemu-kvm-rhev。

      [root@dywH ~]# rpm -qf /etc/udev/rules.d/80-kvm.rules 
      qemu-kvm-rhev-0.12.1.2-2.355.el6_4.9.x86_64
      

   7. 重新安裝 qemu-kvm-rhev 套件。

      [root@dywH ~]# yum reinstall qemu-kvm-rhev
      

3. 問題二：virt-install 安裝虛擬機時出現以下錯誤訊息：
   

   ** (anaconda:778): WARNING **: Could not open X display
   An unknown error has occured, look at the /tmp/anaconda-tb* file(s) for more details
   
   ===============================================================================
   An unknown error has occurred
   ===============================================================================
   anaconda 19.31.14-1 exception report
   Traceback (most recent call first):
     File "/usr/lib64/python2.7/site-packages/pyanaconda/ui/tui/hubs/summary.py", line 60, in prompt
       raise RuntimeError(errtxt)
     File "/usr/lib64/python2.7/site-packages/pyanaconda/ui/tui/simpleline/base.py", line 345, in _mainloop
       prompt = last_screen.prompt(self._screens[-1][1])
   RuntimeError: Can't have a question in command line mode!
   
   What do you want to do now?
   1) Report Bug
   2) Debug
   3) Quit
   
   Please make your choice from above: Something went wrong (tm)
   Cannot continue. Aborting.
   

4. 原因為 undefine 虛擬機 domain 時沒有一併刪除 image 檔，解決方式：
   

   [root@dywH ~]# rm /var/lib/libvirt/images/kvm5usb.qcow2
   

5. 問題三：虛擬機新增網卡後 DHCP 自動取得 IP，造成 SSH 連續操作鍵盤輸入停頓。
   

   [root@dywH ~]# virsh domiflist kvm7usb
   Interface  Type       Source     Model       MAC
   -------------------------------------------------------
   vnet3      network    default    virtio      52:54:00:22:bd:ce
   vnet4      network    default    virtio      52:54:00:00:00:71
   vnet5      network    default    virtio      52:54:00:00:00:72
   

6. 解決方式：刪除不用的 connections。
   

   [root@dywH ~]# ssh kvm7.deyu.wang
   root@kvm7.deyu.wang's password: 
   Last login: Sun Aug 30 21:05:41 2015 from deyu.wang
   [root@kvm7 ~]# nmcli connection 
   NAME                UUID                                  TYPE            DEVICE 
   Wired connection 1  c1434cae-fd3c-48d8-b070-535c6356e7ba  802-3-ethernet  eth1   
   eth0                4742279b-e673-4072-89ac-7d11ea2a86c6  802-3-ethernet  eth0   
   Wired connection 2  4b79d058-6f0f-44b8-942f-491134c69eb1  802-3-ethernet  eth2   
   [root@kvm7 ~]# nmcli connection delete Wired\ connection\ 1
   [root@kvm7 ~]# nmcli connection delete Wired\ connection\ 2
   [root@kvm7 ~]# nmcli connection show 
   NAME  UUID                                  TYPE            DEVICE 
   eth0  a197ddb1-25a7-4c87-9a4a-03b3e51eb86e  802-3-ethernet  eth0