{{category PCクラスタ}}
*NFSROOTによるディスクレスブート環境の構築
　Debian squeeze上にネットワーク経由のディスクレスブート用環境を構築する。
*master node側ファイル
**/etc/hosts
 127.0.0.1       localhost
 127.0.1.1       hostname.hogehoge.com       hostname
 192.168.99.1    hostname.mycluster.home     hostname
 192.168.99.5    ssi5.mycluster.home         ssi5
 192.168.99.6    ssi6.mycluster.home         ssi6
 192.168.99.7    ssi7.mycluster.home         ssi7
 192.168.99.8    ssi8.mycluster.home         ssi8
 192.168.99.9    ssi5.mycluster.home         ssi9
 192.168.99.10   ssi6.mycluster.home         ssi10
 192.168.99.11   ssi7.mycluster.home         ssi11
 192.168.99.12   ssi8.mycluster.home         ssi12
**/etc/fstab
 proc          /proc               proc  defaults          0 0
 UUID=hogehoge /                   ext4  errors=remount-ro 0 1
 /boot         /srv/tftp/boot      none  bind              0 0
 LABEL=OCFS2   /work               ocfs2 _netdev           0 0
 /bin          /NFSROOT/slave/bin  none  bind              0 0
 /usr          /NFSROOT/slave/usr  none  bind              0 0
 /sbin         /NFSROOT/slave/sbin none  bind              0 0
 /home         /NFSROOT/slave/home none  bind              0 0
 /lib          /NFSROOT/slave/lib  none  bind              0 0
 /opt          /NFSROOT/slave/opt  none  bind              0 0
 /root         /NFSROOT/slave/root none  bind              0 0
**/srv/tftp/pxelinux.cfg/default
 DEFAULT wheezy
 LABEL wheezy
     kernel boot/vmlinuz-3.1.0-1-amd64
     append initrd=boot/initrd.img-3.1.0-1-slave ip=dhcp root=/dev/nfs nfsroot=192.168.99.1:/NFSROOT/slave rw
*コマンド
 sudo apt-get install \
 dhcp3-server atftpd nfs-kernel-server \
 syslinux debootstrap ntp ntpdate
 sudo mkdir -p /NFSROOT
 sudo sudo debootstrap wheezy \
 /NFSROOT/slave \
 http://ftp.jp.debian.org/debian/
 sudo rm -rf etc/hosts bin/* usr/* sbin/* home/* lib/* opt/* root/*
 sudo ne /etc/fstab
 sudo cp /usr/lib/syslinux/pxelinux.0 /srv/tftp/
 cd /srv/tftp
 sudo mkdir boot
 sudo mount --bind /boot /srv/tftp/boot
 sudo mkdir pxelinux.cfg
 sudo ne pxelinux.cfg/default
 #内容は以下
 #DEFAULT kerrighed
 #LABEL kerrighed
 #    kernel boot/vmlinuz-2.6.30-krg
 #    append ip=dhcp root=/dev/nfs session_id=1
 sudo nano -w /etc/default/atftpd
 #変更点は以下
 #USE_INETD=false
 #OPTIONS="--daemon --tftpd-timeout 300 \
 #--retry-timeout 5 --mcast-port 1758 \
 #--mcast-addr 239.239.239.0-255 --mcast-ttl 1 \
 #--maxthread 100 --verbose=5 /srv/tftp"
 sudo /etc/init.d/atftpd start
 sudo nano -w /etc/default/ntpdate
 #変更点は以下
 #NTPSERVERS="ntp1.jst.mfeed.ad.jp ntp2.jst.mfeed.ad.jp ntp3.jst.mfeed.ad.jp"
 sudo ne /etc/default/isc-dhcp-server
 #変更点は以下
 #INTERFACES="bond0"
 sudo ne /etc/dhcp/dhcpd.conf
 #変更点は以下
 #option domain-name-servers 192.168.99.1;
 #option ntp-servers ntp1.jst.mfeed.ad.jp, ntp2.jst.mfeed.ad.jp, ntp3.jst.mfeed.ad.jp;
 #subnet 192.168.99.0 netmask 255.255.255.0 {
 #    option routers 192.168.99.1;
 #    option subnet-mask 255.255.255.0;
 #    option broadcast-address 192.168.99.255;
 #    range 192.168.99.5 192.168.99.254;
 #    send host-name = concat("krgnode", binary-to-ascii(10, 8, ".", substring(leased-address, 3, 1)));
 #}
 #group {
 #    filename "/srv/tftp/pxelinux.0";
 #    server-name "192.168.99.1";
 #    option root-path "/NFSROOT/kerrighed";
 #}
 sudo nano -w /etc/exports
 #内容は以下
 #/NFSROOT/kerrighed *(rw,sync,no_root_squash,no_subtree_check)