[[PageOutline]]
= XEN VM placement engine - OpenNEbula = 
== 1. Requirement ==
 1.1 '''''__Xen installation__'''''
   * [wiki:Xen_Installation Install from deb]
   * [wiki:Servers/virt_machines/kernel Install from source]
 1.2 '''''__Required Package Installatiom__'''''
{{{
$ sudo aptitude install ruby sqlite3 libsqlite3-0 libsqlite3-dev libsqlite3-ruby \ 
libxmlrpc-c3 libxmlrpc-c3-dev scons g++ flex bison
}}}
     * Package information:
        * ruby: An interpreter of object-oriented scripting language Ruby 
        * sqlite3: A command line interface for SQLite 3
        * libxmlrpc-c3: A lightweight RPC library based on XML and HTTP for C and C++
        * scons: A replacement for Make
        * flex: A fast lexical analyzer generator
        * bison: A parser generator that is compatible with YACC

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== 2. OpenNEbula Installation ==
  2.1 '''''__[http://www.opennebula.org/doku.php?id=software OpenNEbula download]__'''''
{{{
$ tar zxvf one-1.2.0.tar.gz
$ cd one-1.2.0
$ scons
$ sudo mkdir /home/one 
$ sudo ./install.sh -d /home/one
}}}
 2.2 '''''__Verification__'''''
{{{
$ ls /home/one
bin  etc  include  lib  share  var
}}}

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== 3. OpenNEbula Usage ==
 * Environment Setup
{{{
$ sudo vim /etc/profile
export ONE_LOCATION=/home/one
export ONE_XMLRPC=http://localhost:2633/RPC2
export PATH=$ONE_LOCATION/bin:$PATH
}}}
 * Statup OpenNEbula
{{{
$ sudo one start
}}}
 * Add Cluster
{{{
$ onehost create one im_xen vmm_xen tm_ssh
$ onehost list
 HID NAME                      RVM   TCPU   FCPU   ACPU    TMEM    FMEM STAT
   0 one                         0    400    400    400 6216704  130048   on
}}}

== 4. Massively Deployment of Cluster ==
 * Refer to https://trac.nchc.org.tw/grid/wiki/jazz/DRBL_Xen

== 5. Using OpenNEbula to submit VM ==
 * Create Image (We using xen-tools)
{{{
$ sudo vim /etc/xen-tools
$ sudo xen-create-image --hostname test1 --ip 140.110.X.X --acounts
}}}
 * Configuration
{{{
$ vim /home/images/domains/test1/test1.cfg
MEMORY=128
CPU=4
OS=[
     kernel="/boot/vmlinuz-2.6.18.8",
     initrd="/boot/initrd.img-2.6.18.8",
     root="sda1",
     boot="hd"]
DISK=[
     source="/home/images/domains/vm01/disk.img",
     target="sda1",
     readonly=no]
DISK=[
     source="/home/images/domains/vm01/swap.img",
     target="sda2",
     readonly=no]
NIC=[mac="00:16:3e:01:01:03"]

}}}

 * Submit vm in OpenNEbula
{{{
$ sudo onevm submit test1.cfg
$ sudo onevm list
  ID     NAME STAT CPU     MEM        HOSTNAME        TIME
   0    one-0 runn   0  131072             one 00 00:05:24

$ sudo xm list
Name                                        ID   Mem VCPUs      State   Time(s)
Domain-0                                     0  5840     4     r-----    307.8
one-0                                        2   128     1     -b----      1.6

$ sudo xm console one-0
}}}

== Problem ==
 * Ubuntu 8.10 的kernel 2.6.27-9-server 目前只support DomU (no Dom0) 2008/12/10

== 想法 ==
 * OpenNEbula的控制介面非常簡單明瞭，DRBL是否也可加入類似的介面來監控和管理node。
 * 降的架構可以完善的提供IaaS的服務嗎？是否還有缺失呢？
 * 是否撰寫Web版的OpenNEbula介面，讓外界的使用者可以透過簡單的點選來創建自己的VM？

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== Reference ==
 * [http://www.opennebula.org/doku.php?id=start OpenNEbula]