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YAMAGUCHI::weblog

土足で窓から失礼いたします。今日からあなたの息子になります。 当年とって92歳、下町の発明王、エジソンです。

Xenで仮想化環境を構築した(はじめて編)

Xen CentOS

動機

仮想化についてベアメタル型の環境は逃げ逃げだったのでとりあえず始めてみた。まずは会社の製品も絡んでいるのでXen系統から。ある程度使いかたわかったら次はLinuxでは流れがきているKVMに。

環境

CPU AMD Athlon Phenom II X4 905e (2.5GHz Quad)
RAM 5.0GB
OS CentOS 5.4
kernel 2.6.18-164.el5xen

Xenのインストール

自分はOSをインストールするときに「仮想化」のパッケージグループを選択して、XenKVM関係のパッケージをごりっとインストールしたので、OSのインストール完了時にはすでにDomain-0(dom0)が出来ていて、使用メモリも最大限が割当たってる状態でした。

# xm list
Name                                        ID   Mem VCPUs      State   Time(s)
Domain-0                                     0  4916     4     r-----     37.4

Xenのバージョンを上げる

CentOS 5.4のデフォルトではXen3.0.3なので、これは残念ということでXenのバージョンを上げます。

ここからXen3.4.2のパッケージを引っ張ってくる。自分は極力yumにrpm管理させたいのでrepoファイルを取ってきて/etc/yum.repos.dに追加しました。

# cd /etc/yum.repost.d
# wget http://www.gitco.de/repo/CentOS5-GITCO_x86_64.repo

するとgitcoのレポジトリを見に行って、新しいパッケージを取ってきてくれます。

$ yum search xen
Installed Packages <-- JAISTの方
Name       : xen
Arch       : x86_64
Version    : 3.0.3
Release    : 94.el5_4.3
...
Available Packages <-- gitcoの方
Name       : xen
Arch       : x86_64
Version    : 3.4.1
Release    : 7.el5
...
$ sudo yum update xen virt-manager

これでXen Hypervisorが3.4.2になりました。(kernel-xenは変更してません)

Domain-U(domU)を作成する

CentOSではvirt-installを使ってdomUを簡単に作成することができます。今回は下記のようなオプションを作成しました。準仮想化で、CPU数は1、10GBの仮想ディスクを作成します。またインストーラはsshしているコンソール上で行うのでGUIはオフ。

$ virt-install \
--paravirt \
--name=masaru \
--vcpus=1 \
--ram=2048 \
--file=/var/xen/masaru/disk.img \
--file-size=10 \
--nonsparse \
--location=http://ftp.riken.jp/Linux/centos/5/os/x86_64/ \
--nographics

インストールを開始しています...
ファイル vmlinuz を読出中...                     | 1.9 MB     00:00     TA 
ファイル initrd.img を読出中...                  | 7.1 MB     00:01     ETA 
ストレージファイルを作成中...               |  10 GB     01:18      ETA 
ドメインを作成中...                              |    0 B     00:14     
Connected to domain masaru
Escape character is ^]
Bootdata ok (command line is method=http://ftp.riken.jp/Linux/centos/5/os/x86_64/)
Linux version 2.6.18-164.el5xen (mockbuild@builder10.centos.org) (gcc version 4.1.2 20080704 (Red Hat 4.1.2-46)) #1 SMP Thu Sep 3 04:03:03 EDT 2009
BIOS-provided physical RAM map:
 Xen: 0000000000000000 - 0000000080800000 (usable)
No mptable found.
Built 1 zonelists.  Total pages: 526336
Kernel command line: method=http://ftp.riken.jp/Linux/centos/5/os/x86_64/
Initializing CPU#0
PID hash table entries: 4096 (order: 12, 32768 bytes)
Xen reported: 2500.000 MHz processor.
Console: colour dummy device 80x25
Dentry cache hash table entries: 524288 (order: 10, 4194304 bytes)
Inode-cache hash table entries: 262144 (order: 9, 2097152 bytes)
Software IO TLB disabled
Memory: 2038528k/2105344k available (2490k kernel code, 57932k reserved, 1388k data, 184k init)
Calibrating delay using timer specific routine.. 6253.36 BogoMIPS (lpj=12506731)
Security Framework v1.0.0 initialized
SELinux:  Initializing.
selinux_register_security:  Registering secondary module capability
Capability LSM initialized as secondary
Mount-cache hash table entries: 256
...
XENBUS: Device with no driver: device/vbd/51712
XENBUS: Device with no driver: device/vif/0
XENBUS: Device with no driver: device/console/0
Initalizing network drop monitor service
Write protecting the kernel read-only data: 478k

Greetings.
anaconda installer init version 11.1.2.195 starting
mounting /proc filesystem... done
creating /dev filesystem... done
mounting /dev/pts (unix98 pty) filesystem... done
mounting /sys filesystem... done
anaconda installer init version 11.1.2.195 using /dev/xvc0 as console
trying to remount root filesystem read write... done
mounting /tmp as ramfs... done
running install...
running /sbin/loader

とこんな具合に仮想マシンが起動し、インストーラが走ります。うまく表示されてないですが、選択したいところでスペースおしたり、タブで項目移動するのは一緒です。

Welcome to CentOS                                                               
                                                                                
                   +---------+ Choose a Language +---------+                    
                   |                                       |                    
                   | What language would you like to use   |                    
                   | during the installation process?      |                    
                   |                                       |                    
                   |       Croatian               ^        |                    
                   |       Czech                  :        |                    
                   |       Danish                 #        |                    
                   |       Dutch                  :        |                    
                   |       English                :        |                    
                   |       Estonian               :        |                    
                   |       Finnish                :        |                    
                   |       French                 v        |                    
                   |                                       |                    
                   |                +----+                 |                    
                   |                | OK |                 |                    
                   |                +----+                 |                    
                   |                                       |                    
                   |                                       |                    
                   +---------------------------------------+                    
                                                                                
  <Tab>/<Alt-Tab> between elements  | <Space> selects | <F12> next screen      

インストール用のネットワークの設定なのでIPv4のDHCPのみ選択して次へ。

Welcome to CentOS                                                               
                                                                                
                                                                                
             +----------------+ Configure TCP/IP +----------------+             
             |                                                    |             
             | [*] Enable IPv4 support                            |             
             |        (*) Dynamic IP configuration (DHCP)         |             
             |        ( ) Manual configuration                    |             
             |                                                    |             
             | [ ] Enable IPv6 support                            |             
             |        (*) Automatic neighbor discovery (RFC 2461) |             
             |        ( ) Dynamic IP configuration (DHCP)         |             
             |        ( ) Manual configuration                    |             
             |                                                    |             
             |          +----+                  +------+          |             
             |          | OK |                  | Back |          |             
             |          +----+                  +------+          |             
             |                                                    |             
             |                                                    |             
             +----------------------------------------------------+             
                                                                                
                                                                                
                                                                                
  <Tab>/<Alt-Tab> between elements  | <Space> selects | <F12> next screen      

インストーラのディスクイメージを引っ張ってきています。

Welcome to CentOS                                                               
                                                                                
                                                                                
    +----------------------------+ Retrieving +----------------------------+    
    |                                                                      |    
    | Retrieving images/stage2.img...                                      |    
    |                                                                      |    
    +----------------------------------------------------------------------+    
                                                                                
                                                                                
                                                                                
  <Tab>/<Alt-Tab> between elements  | <Space> selects | <F12> next screen      

GUIは使わないので"Use text mode"を選択。

                                                                                
                 +------+ Would you like to use VNC? +-------+                  
                 |                                           |                  
                 | The VNC mode installation offers more     |                  
                 | functionality than the text mode, would   |                  
                 | you like to use it instead?               |                  
                 |                                           |                  
                 |   +---------------+      +-----------+    |                  
                 |   | Use text mode |      | Start VNC |    |                  
                 |   +---------------+      +-----------+    |                  
                 |                                           |                  
                 |                                           |                  
                 +-------------------------------------------+                  
                                                                                
  <Tab>/<Alt-Tab> between elements   |  <Space> selects   |  <F12> next screen 

こんにちは!

Welcome to CentOS                                                               
                                                                                
                                                                                
               +------------------+ CentOS +-------------------+                
               |                                               |                
               | Welcome to CentOS!                            |                
               |                                               |                
               |                                               |                
               |                    +----+                     |                
               |                    | OK |                     |                
               |                    +----+                     |                
               |                                               |                
               |                                               |                
               +-----------------------------------------------+                
                                                                                
                                                                                
  <Tab>/<Alt-Tab> between elements   |  <Space> selects   |  <F12> next screen 

仮想ディスク初期化してないので出る表示。ぜひ初期化してください。

Welcome to CentOS                                                               
                  +---------------+ Warning +---------------+                   
                  |                                         |                   
                  | The partition table on device xvda    ^ |                   
                  | (Xen Virtual Block Device 10237 MB)   # |                   
                  | was unreadable.                       : |                   
                  | To create new partitions it must be   : |                   
                  | initialized, causing the loss of      : |                   
                  | ALL DATA on this drive.               : |                   
                  |                                       : |                   
                  | This operation will override any      : |                   
                  | previous installation choices about   : |                   
                  | which drives to ignore.               : |                   
                  |                                       : |                   
                  | Would you like to initialize this     v |                   
                  |                                         |                   
                  |       +-----+             +----+        |                   
                  |       | Yes |             | No |        |                   
                  |       +-----+             +----+        |                   
                  |                                         |                   
                  |                                         |                   
                  +-----------------------------------------+                   
                                                                                
  <Tab>/<Alt-Tab> between elements   |  <Space> selects   |  <F12> next screen 

xvdaというXen用のディスクデバイスを選択。(当然ながら実態は仮想ディスク)

Welcome to CentOS                                                               
   +-------------------------+ Partitioning Type +-------------------------+    
   |                                                                       |    
   |    Installation requires partitioning of your hard drive.  The        |    
   |    default layout is reasonable for most users.  You can either       |    
   |    choose to use this or create your own.                             |    
   |                                                                       |    
   | Remove all partitions on selected drives and create default layout.   |    
   | Remove linux partitions on selected drives and create default layout. |    
   | Use free space on selected drives and create default layout.          |    
   | Create custom layout.                                                 |    
   |                                                                       |    
   |       Which drive(s) do you want to use for this installation?        |    
   |          [*]   xvda    10237 MB (Xen Virtual Block Device) ^          |    
   |                                                            #          |    
   |                                                                       |    
   |                          +----+   +------+                            |    
   |                          | OK |   | Back |                            |    
   |                          +----+   +------+                            |    
   |                                                                       |    
   |                                                                       |    
   +-----------------------------------------------------------------------+    
                                                                                
<Space>,<+>,<-> selection   |   <F2> Add drive   |   <F12> next screen         

はい、お願いします。

Welcome to CentOS                                                               
                                                                                
                                                                                
                                                                                
              +-------------------+ Warning +--------------------+              
              |                                                  |              
              | You have chosen to remove all Linux partitions   |              
              | (and ALL DATA on them) on the following drives:  |              
              |                                                  |              
              | xvda (Xen Virtual Block Device 10237 MB)         |              
              |                                                  |              
              | Are you sure you want to do this?                |              
              |                                                  |              
              |         +----+                  +-----+          |              
              |         | No |                  | Yes |          |              
              |         +----+                  +-----+          |              
              |                                                  |              
              |                                                  |              
              +--------------------------------------------------+              
                                                                                
                                                                                
                                                                                
                                                                                
  <Tab>/<Alt-Tab> between elements   |  <Space> selects   |  <F12> next screen 

一応パーティションの情報を確認します。

Welcome to CentOS                                                               
                                                                                
                                                                                
                  +-------+ Review Partition Layout +-------+                   
                  |                                         |                   
                  | Review and modify partitioning layout?  |                   
                  |                                         |                   
                  |       +-----+             +----+        |                   
                  |       | Yes |             | No |        |                   
                  |       +-----+             +----+        |                   
                  |                                         |                   
                  |                                         |                   
                  +-----------------------------------------+                   
                                                                                
  <Tab>/<Alt-Tab> between elements   |  <Space> selects   |  <F12> next screen 

次はファイルシステムの設定画面。swapに4096MBとか割当たってたので2048MBに変更。

Welcome to CentOS                                                               
                                                                                
 +------------------------------+ Partitioning +------------------------------+ 
 |                                                                            | 
 |        Device          Start    End     Size       Type     Mount Point    | 
 | VG VolGroup00                           10112M  VolGroup                 ^ | 
 | LV LogVol00                              8064M  ext3        /            : | 
 | LV LogVol01                              2048M  swap                     : | 
 | /dev/xvda                                                                # | 
 |   xvda1                     1      13     101M  ext3        /boot        : | 
 |   xvda2                    14    1305   10134M  physical v               : | 
 |                                                                          : | 
 |                                                                          : | 
 |                                                                          : | 
 |                                                                          v | 
 |                                                                            | 
 |      +-----+   +------+   +--------+   +------+   +----+   +------+        | 
 |      | New |   | Edit |   | Delete |   | RAID |   | OK |   | Back |        | 
 |      +-----+   +------+   +--------+   +------+   +----+   +------+        | 
 |                                                                            | 
 |                                                                            | 
 +----------------------------------------------------------------------------+ 
                                                                                
    F1-Help     F2-New      F3-Edit   F4-Delete    F5-Reset    F12-OK          

ブートローダにはGRUBを使います。

Welcome to CentOS                                                               
                                                                                
                                                                                
              +----------+ Boot Loader Configuration +-----------+              
              |                                                  |              
              | Which boot loader would you like to use?         |              
              |                                                  |              
              |             (*) Use GRUB Boot Loader             |              
              |                ( ) No Boot Loader                |              
              |                                                  |              
              |         +----+                 +------+          |              
              |         | OK |                 | Back |          |              
              |         +----+                 +------+          |              
              |                                                  |              
              |                                                  |              
              +--------------------------------------------------+              
                                                                                
                                                                                
  <Tab>/<Alt-Tab> between elements   |  <Space> selects   |  <F12> next screen 

特に設定することはないのでデフォルト値を使用。

Welcome to CentOS                                                               
                                                                                
      +------------------+ Boot Loader Configuration +------------------+       
      |                                                                 |       
      | A few systems will need to pass special options to the kernel   |       
      | at boot time for the system to function properly. If you need   |       
      | to pass boot options to the kernel, enter them now. If you      |       
      | don't need any or aren't sure, leave this blank.                |       
      |                                                                 |       
      |        console=xvc0____________________________________         |       
      |                                                                 |       
      |         [ ] Force use of LBA32 (not normally required)          |       
      |                                                                 |       
      |             +----+                        +------+              |       
      |             | OK |                        | Back |              |       
      |             +----+                        +------+              |       
      |                                                                 |       
      |                                                                 |       
      +-----------------------------------------------------------------+       
                                                                                
  <Tab>/<Alt-Tab> between elements   |  <Space> selects   |  <F12> next screen 

GRUBのパスワードを設定する場合はここで設定。自分はいらないので空のまま進める。

Welcome to CentOS                                                               
                                                                                
                                                                                
           +-------------+ Boot Loader Configuration +-------------+            
           |                                                       |            
           | A boot loader password prevents users from passing    |            
           | arbitrary options to the kernel.  For highest         |            
           | security, we recommend setting a password, but this   |            
           | is not necessary for more casual users.               |            
           |                                                       |            
           |                [ ] Use a GRUB Password                |            
           |                                                       |            
           |    Boot Loader Password: ________________________     |            
           |    Confirm:              ________________________     |            
           |                                                       |            
           |          +----+                    +------+           |            
           |          | OK |                    | Back |           |            
           |          +----+                    +------+           |            
           |                                                       |            
           |                                                       |            
           +-------------------------------------------------------+            
                                                                                
                                                                                
  <Tab>/<Alt-Tab> between elements   |  <Space> selects   |  <F12> next screen 

起動デバイスにLVMを選択します。

Welcome to CentOS                                                               
                                                                                
     +-------------------+ Boot Loader Configuration +-------------------+      
     |                                                                   |      
     | The boot manager CentOS uses can boot other operating systems     |      
     | as well. You need to tell me what partitions you would like to    |      
     | be able to boot and what label you want to use for each of them.  |      
     |                                                                   |      
     | Default  Boot label                Device                         |      
     |    *     CentOS                    /dev/VolGroup00/LogVol00   ^   |      
     |                                                               :   |      
     |                                                               :   |      
     |                                                               #   |      
     |                                                               v   |      
     |                                                                   |      
     |        +----+              +------+              +------+         |      
     |        | OK |              | Edit |              | Back |         |      
     |        +----+              +------+              +------+         |      
     |                                                                   |      
     |                                                                   |      
     +-------------------------------------------------------------------+      
                                                                                
                                                                                
 <Space> select | <F2> select default | <F4> delete | <F12> next screen>       

ブートローダのインストール先を選択。MBRに入れてください。

Welcome to CentOS                                                               
                                                                                
              +----------+ Boot Loader Configuration +----------+               
              |                                                 |               
              | Where do you want to install the boot loader?   |               
              |                                                 |               
              | /dev/xvda        Master Boot Record (MBR)       |               
              | /dev/xvda1       First sector of boot partition |               
              |                                                 |               
              |         +----+                +------+          |               
              |         | OK |                | Back |          |               
              |         +----+                +------+          |               
              |                                                 |               
              |                                                 |               
              +-------------------------------------------------+               
                                                                                
  <Tab>/<Alt-Tab> between elements   |  <Space> selects   |  <F12> next screen 

ネットワークの設定は当然します。Yesを選択。

Welcome to CentOS                                                               
                                                                                
                   +----+ Configure Network Interface +-----+                   
                   |                                        |                   
                   | Would you like to configure the eth0   |                   
                   | network interface in your system?      |                   
                   |                                        |                   
                   |       +-----+            +----+        |                   
                   |       | Yes |            | No |        |                   
                   |       +-----+            +----+        |                   
                   |                                        |                   
                   |                                        |                   
                   +----------------------------------------+                   
                                                                                
  <Tab>/<Alt-Tab> between elements   |  <Space> selects   |  <F12> next screen 

IPv6は特にいらないのでデフォルトのままでOKを押す。

Welcome to CentOS                                                               
                                                                                
                      ++ Network Configuration for eth0 ++                      
                      |                                  |                      
                      |     Xen Virtual Ethernet         |                      
                      |     00:16:36:78:65:75            |                      
                      |                                  |                      
                      |     [*] Activate on boot         |                      
                      |     [*] Enable IPv4 support      |                      
                      |     [ ] Enable IPv6 support      |                      
                      |                                  |                      
                      |       +----+    +------+         |                      
                      |       | OK |    | Back |         |                      
                      |       +----+    +------+         |                      
                      |                                  |                      
                      |                                  |                      
                      +----------------------------------+                      
                                                                                
  <Tab>/<Alt-Tab> between elements   |  <Space> selects   |  <F12> next screen 

DHCPにするのでこのままOKを押す。

Welcome to CentOS                                                               

                  +-----+ IPv4 Configuration for eth0 +-----+                   
                  |                                         |                   
                  | Xen Virtual Ethernet                    |                   
                  | 00:16:36:78:65:75                       |                   
                  |                                         |                   
                  | (*) Dynamic IP configuration (DHCP)     |                   
                  | ( ) Manual address configuration        |                   
                  |                                         |                   
                  |     IP Address         Prefix (Netmask) |                   
                  |     ________________ / ________________ |                   
                  |                                         |                   
                  |       +----+            +------+        |                   
                  |       | OK |            | Back |        |                   
                  |       +----+            +------+        |                   
                  |                                         |                   
                  |                                         |                   
                  +-----------------------------------------+                   
                                                                                
  <Tab>/<Alt-Tab> between elements   |  <Space> selects   |  <F12> next screen 

ホスト名もとりあえずDHCPによる割り振りにします。

Welcome to CentOS                                                               
                                                                                
      +--------------------+ Hostname Configuration +--------------------+      
      |                                                                  |      
      | If your system is part of a larger network where hostnames are   |      
      | assigned by DHCP, select automatically via DHCP. Otherwise,      |      
      | select manually and enter a hostname for your system. If you     |      
      | do not, your system will be known as 'localhost.'                |      
      |                                                                  |      
      |       (*) automatically via DHCP                                 |      
      |       ( ) manually               ________________________        |      
      |                                                                  |      
      |             +----+                         +------+              |      
      |             | OK |                         | Back |              |      
      |             +----+                         +------+              |      
      |                                                                  |      
      |                                                                  |      
      +------------------------------------------------------------------+      
                                                                                
  <Tab>/<Alt-Tab> between elements   |  <Space> selects   |  <F12> next screen 

タイムゾーンはAsia/Tokyoを選択。

Welcome to CentOS                                                               
                                                                                
                    +-------+ Time Zone Selection +-------+                     
                    |                                     |                     
                    | What time zone are you located in?  |                     
                    |                                     |                     
                    | [*] System clock uses UTC           |                     
                    |                                     |                     
                    |  Asia/Tbilisi                    ^  |                     
                    |  Asia/Tehran                     :  |                     
                    |  Asia/Thimphu                    #  |                     
                    |  Asia/Tokyo                      :  |                     
                    |  Asia/Ulaanbaatar                v  |                     
                    |                                     |                     
                    |      +----+          +------+       |                     
                    |      | OK |          | Back |       |                     
                    |      +----+          +------+       |                     
                    |                                     |                     
                    |                                     |                     
                    +-------------------------------------+                     

  <Tab>/<Alt-Tab> between elements   |  <Space> selects   |  <F12> next screen 

rootのパスワードの設定。

Welcome to CentOS                                                               
                                                                                
                +--------------+ Root Password +---------------+                
                |                                              |                
                | Pick a root password. You must type it       |                
                | twice to ensure you know what it is and      |                
                | didn't make a mistake in typing. Remember    |                
                | that the root password is a critical part    |                
                | of system security!                          |                
                |                                              |                
                | Password:           ********________________ |                
                | Password (confirm): ********________________ |                
                |                                              |                
                |        +----+               +------+         |                
                |        | OK |               | Back |         |                
                |        +----+               +------+         |                
                |                                              |                
                |                                              |                
                +----------------------------------------------+                
                                                                                
  <Tab>/<Alt-Tab> between elements   |  <Space> selects   |  <F12> next screen 

インストールするパッケージグループの選択をします。

Welcome to CentOS                                                               
                                                                                
      +----------------------+ Package selection +----------------------+       
      |                                                                 |       
      | The default installation of CentOS includes a set of software   |       
      | applicable for general internet usage. What additional tasks    |       
      | would you like your system to include support for?              |       
      |                                                                 |       
      |                    [*] Server - GUI       ^                     |       
      |                    [ ] Virtualization     :                     |       
      |                    [ ] Clustering         #                     |       
      |                    [ ] Storage Clustering v                     |       
      |                                                                 |       
      |                [*] Customize software selection                 |       
      |                                                                 |       
      |             +----+                        +------+              |       
      |             | OK |                        | Back |              |       
      |             +----+                        +------+              |       
      |                                                                 |       
      |                                                                 |       
      +-----------------------------------------------------------------+       
                                                                                
                                                                                
  <Tab>/<Alt-Tab> between elements   |  <Space> selects   |  <F12> next screen 

自分が選んだパッケージは下記の通り。

  • Administration Tools
  • Base
  • Development Tools
  • Editors
  • GNOME Desktop Environment
  • Graphical Internet
  • Web Server
  • X Window System

そしていよいよインストールを始めます!

Welcome to CentOS                                                               
                                                                                
                 +---------+ Installation to begin +----------+                 
                 |                                            |                 
                 | A complete log of your installation will   |                 
                 | be in /root/install.log after rebooting    |                 
                 | your system. You may want to keep this     |                 
                 | file for later reference.                  |                 
                 |                                            |                 
                 |       +----+              +------+         |                 
                 |       | OK |              | Back |         |                 
                 |       +----+              +------+         |                 
                 |                                            |                 
                 |                                            |                 
                 +--------------------------------------------+                 
                                                                                
<Space>,<+>,<-> selection   |   <F2> Group Details   |   <F12> next screen     

進捗がずーっと表示されます。

Welcome to CentOS                                                               
                                                                                
         +------------------+ Package Installation +------------------+         
         |                                                            |         
         |  Name   :                                                  |         
         |  Size   :                                                  |         
         |  Summary:                                                  |         
         |                                                            |         
         |                                                            |         
         |  Status:+---------+ Install Starting +----------+          |         
         |         |                                       |          |         
         |         | Starting install process.  This may   |          |         
         |         | take several minutes...               |          |         
         |         |                                       |   Time   |         
         |   Total +---------------------------------------+          |         
         |   Complet                                                  |         
         |   Remaining:                  944      2311M               |         
         |                                                            |         
         |                             0%                             |         
         |                                                            |         
         +------------------------------------------------------------+         
                                                                                
                                                                                
<Space>,<+>,<-> selection   |   <F2> Group Details   |   <F12> next screen     

いよいよインストールが終わって再起動します!

Welcome to CentOS                                                               
                                                                                
          +----------------------+ Complete +-----------------------+           
          |                                                         |           
          | Congratulations, your CentOS installation is complete.  |           
          |                                                         |           
          | Remove any media used during the installation process   |           
          | and press <Enter> to reboot your system.                |           
          |                                                         |           
          |                                                         |           
          |                       +--------+                        |           
          |                       | Reboot |                        |           
          |                       +--------+                        |           
          |                                                         |           
          |                                                         |           
          +---------------------------------------------------------+           
                                                                                
                               <Enter> to reboot                               

domUが再起動される様子がターミナルに表示されます。

sending termination signals...done                                             
sending kill signals...done
disabling swap...
	/dev/mapper/VolGroup00-LogVol01
unmounting filesystems...
	/mnt/runtime done
	disabling /dev/loop0
	/proc done
	/dev/pts done
	/sys done
	/tmp/ramfs done
	/selinux done
	/mnt/sysimage/boot done
	/mnt/sysimage/sys done
	/mnt/sysimage/proc done
	/mnt/sysimage/selinux done
	/mnt/sysimage/dev done
	/mnt/sysimage done
rebooting system
Restarting system.

ゲストのインストールが完了しました... ゲストを再起動しています

Ctrl-]を押してdom0に戻ってみます。下記のコマンドで無事にdomUが作成されたことを確認します。

# xm list
Name                                        ID   Mem VCPUs      State   Time(s)
Domain-0                                     0  2464     4     r-----   1583.4
masaru                                       3  2048     1     -b----   1219.4