= 叢集 =
== 1.佈署成Cluster ==
 1. 可使用 DRBL 或 !CloneZilla 來佈署 Cluster
 2. 此次為了方便，可直接使用隔壁桌的電腦 
----
== 2.第二台機器的設定 ==
 * 更改第二台主機名稱 node02
{{{
$ sudo vim /etc/hostname
$ sudo hostname -f /etc/hostname
CTRL + D

$ sudo /etc/init.d/gdm restart
}}}
 * 重複單機的 0 ~ 4 步驟
 * 確認 /etc/hosts 有彼此的資訊
{{{
// node01 和 node02 的 /etc/hosts
$ sudo vim /etc/hosts
192.168.X.X node01
192.168.X.X node02
}}}
 * 設定兩台的 auto login
{{{
$ su root
$ ssh-keygen -P ""
$ cat ~/.ssh/id_rsa.pub > ~/.ssh/authorized_keys
$ scp -r ~/.ssh node02:~/

$ ssh node02
$ ssh node01
CTRL + D
CTRL + D
}}}
 * 設定共享的 Storage
{{{
// node01 的設定
$ vim /etc/export
/home/domains  192.X.X.X(rw,sync,async,no_root_squash,no_subtree_check)
/home/one      192.X.X.X(rw,sync,async,no_root_squash,no_subtree_check)
$ /etc/init.d/nfs-kernel-server start
$ showmount -a

// node02 的設定
$ sudo mount.nfs node01@/home/domains /home/domains
$ sudo mount.nfs node01@/home/one /home/one
$ mount
}}}

----
== 3.安裝 ONE ==
 * '''''__3.1 安裝需要的套件__'''''
{{{
$ sudo aptitude install ruby sqlite3 libsqlite3-0 libsqlite3-dev libsqlite3-ruby \
libxmlrpc-c3 libxmlrpc-c3-dev scons g++ flex bison
}}}
 * '''''__[http://www.opennebula.org/doku.php?id=software 3.2 下載 ONE 和安裝]__'''''
{{{
$ tar zxvf one-1.2.0.tar.gz
$ cd one-1.2.0
$ scons
$ sudo mkdir /home/one 

// 配置 ONE 環境變數
$ vim ~/.bashrc
export ONE_LOCATION=/home/one
export ONE_XMLRPC=http://localhost:2633/RPC2
export PATH=$PATH:$ONE_LOCATION/bin
$ source ~/.bashrc

$ sudo ./install.sh -d /home/one
}}}

 * '''''__3.3 啟動 ONE__'''''
{{{
$ $ONE_LOCATION/bin/one start
}}}
----
== 4.使用 ONE 於 Xen Cluster ==
 * '''''__4.0 編輯 ONE 設定檔__'''''
{{{
$ cd /home/one
$ vim etc/oned.conf
VM_POLLING_INTERVAL      = 1
}}}
 * '''''__4.1 新增 Host/dom0 到 ONE pool__'''''
{{{
$ onehost add node01 im_xen vmm_xen tm_nfs
$ onehost add node02 im_xen vmm_xen tm_nfs

$ sudo onehost list
}}}
 *  '''''__4.1 使用 ONE 來開啟 VM__'''''
{{{
$ vim /home/domains/xen01.one
NAME   = xen01
CPU    = 1
MEMORY = 156
OS = [ kernel     = /boot/vmlinuz-2.6.22.9-rock,
       initrd     = /boot/initrd.img-2.6.22.9-rock,
       root       = sda2,
       kernel_cmd = "ro xencons=tty console=tty1"]
DISK = [ source   = /home/domains/xen01/disk.img,
         clone    = no,
         target   = sda2,
         readonly = no]
DISK = [  type     = swap,
          size     = 512,
          target   = "sda1",
          readonly = "no" ]
NIC = [mac=""]

$ sudo onevm create xen01.one 
$ sudo onevm deploy xen01 node02

$ sudo onevm list
}}}
 * 練習：請在開啟一個虛擬機器名為 xen02
   * 法一：複製 xen01 的 image，再修改參數
   * 法二：使用 xen-create-image 指令
----
== 5.使用 ONE 開啟 Hadoop Cluster  ==
{{{
$ cd /home/hadoop
$ ./prepare.sh

$ cd /home/domains
$ ./one_creatre_hadoop_cluster.sh

$ onevm list
}}}
 * [https://trac.nchc.org.tw/cloud/wiki/NCHCCloudCourse090331 馬上報名雲端運算基礎課程 ]
----
== 6.測試 Migration ==
 * '''''__6.1 Migrate__'''''
{{{
$ sudo onevm migrate xen01 node02 
$ sudo onevm list
}}}
 * '''''__6.2 Live Migrate__'''''
{{{
$ sudo onevm livemigrate xen01 node02 
$ sudo onevm list
}}}