posted : 27/11/2012 @ 19:38
category : *NIX, Aktifitas, Cerita, Code, Iseng-Iseng, Kerjaan, Review, Slackware, Sok Tau.
just share & sekedar dokumentasi:
mungkin judulnya Gado-gado dari PXE (Preboot eXecution Environment) installer cross distro 
jika sekedar install system cluster linux pada 1, 2, 3 atau 5 mungkin gak ada masalah 
...
tapi…. jika install cluster di 100?... 200?... 500 mesin linux? atau lebih?? demi High-Availability 
cabut colok monitor keyboard? apeee dehh 
mungkin lebih tepatnya: “create RedHat/CentOS automatic installer dgn TFTp / Kickstart & NFS di slackware” cmmiw 
1. TFTP
untuk slackware ada 2 cara mengaktifkan service tftp:
– via service rc.inetd (/etc/inet.d.conf)
tftp dgram udp wait root /usr/sbin/in.tftpd in.tftpd -s /tftpboot -r blksize
– atau create init script (/etc/rc.d/rc.tftpd)
#!/bin/sh # Start/stop/restart the IPv4 Trivial File Transfer Protocol server (in.tftpd) # Written for Slackware Linux by Erik Jan Tromp tftpd_start() { if [ -x /usr/sbin/in.tftpd ]; then echo "Starting in.tftpd: /usr/sbin/in.tftpd -l -s /tftpboot/" /usr/sbin/in.tftpd -l -s /tftpboot/ fi } tftpd_stop() { killall in.tftpd } tftpd_restart() { tftpd_stop sleep 1 tftpd_start } case "$1" in 'start') tftpd_start ;; 'stop') tftpd_stop ;; 'restart') tftpd_restart ;; *) echo "usage: $0 start|stop|restart" esac
buat direktory /tftpboot & copy pxelinux.0 dari CD/DVD RedHat/CentOS & create pxelinux.cfg
# mkdir /tftpboot # mkdir /tftpboot/pxelinux.cfg # # cp /mnt/cdrom/images/pxelinux.0 /tftpboot/pxelinux.0 # cd /tftpboot/pxelinux.cfg # vi default
isi dari file konfigurasi default tftpboot:
default RHEL-Kickstart label RHEL-Kickstart kernel isolinux/vmlinuz append initrd=isolinux/initrd.img text ks=nfs:10.0.5.250:/tftpboot/kickstart/default.ks ksdevice=eth0
2. DHCP
– init script dhcp (/etc/rc.d/rc.dhcpd)
#!/bin/sh # Start/stop/restart the DHCP Server (dhcpd) # Written for Slackware Linux by Erik Jan Tromp dhcpd_start() { if [ -x /usr/sbin/dhcpd -a -f /etc/dhcpd.conf ]; then echo "Starting dhcpd: /usr/sbin/dhcpd -q eth0" /usr/sbin/dhcpd -q eth0 fi } dhcpd_stop() { if [ -r /var/run/dhcpd.pid ] ; then kill `cat /var/run/dhcpd.pid` else killall dhcpd fi } dhcpd_restart() { dhcpd_stop sleep 1 dhcpd_start } case "$1" in 'start') dhcpd_start ;; 'stop') dhcpd_stop ;; 'restart') dhcpd_restart ;; *) echo "usage: $0 start|stop|restart" esac
– konfigurasi DHCP (/etc/dhcpd.conf)
# dhcpd.conf
#
# Configuration file for ISC dhcpd
#
allow bootp;
subnet 10.0.5.0 netmask 255.255.255.0 {
option domain-name "kebonbinatang.org";
option broadcast-address 10.0.5.255;
option subnet-mask 255.255.255.0;
option routers 10.0.5.254;
}
group {
next-server 10.0.5.250;
filename "/pxelinux.0";
host node1 {
hardware ethernet xx:xx:xx:xx:xx:xx;
fixed-address 10.0.5.1;
}
host node2 {
hardware ethernet xx:xx:xx:xx:xx:xx;
fixed-address 10.0.5.2;
}
host node3 {
hardware ethernet xx:xx:xx:xx:xx:xx;
fixed-address 10.0.5.3;
}
host node4 {
hardware ethernet xx:xx:xx:xx:xx:xx;
fixed-address 10.0.5.4;
}
... Dan SeTerusnya....
}
3. NFS
– aktifkan service nfs & rpc
# chmod +x /etc/rc.nfsd # chmod +x /etc/rc.rpc
– edit file /etc/exports
/tftpboot 10.0.5.0/24(ro,sync,insecure,all_squash)
4. Source Installer
– copy semua isi CD/DVD & buat file konfigurasi kickstart
# cp -rvf /mnt/cdrom /tftpboot # mkdir /tftpboot/kickstart
– edit file /tftpboot/kickstart/default.ks
text #text base installation install #fresh install network --device=eth0 --bootproto=dhcp --noipv6 #configure network based on alokasi dhcp nfs --server=10.0.5.250 --dir=/tftpboot #media pd saat install lang en_US.UTF-8 keyboard us #keyboard map rootpw passwordnya-siroot #firewall --service=ssh #enable ssh firewall --disabled #disable firewall.. cuma lokal no public selinux --enforcing authconfig --enableshadow --enablemd5 timezone Asia/Jakarta bootloader --location=mbr --append="noexec=off" skipx reboot #udh beres auto reboot zerombr yes clearpart --all --initlabel #bantai partisi part /boot --fstype ext3 --size=150 --ondisk=sda #bikin partisi boot part pv.01 --size=1 --grow --ondisk=sda # LVM part pv.02 --size=1 --grow --ondisk=sda volgroup rootvg pv.01 volgroup satvg pv.02 logvol / --vgname=rootvg --size=xxxxxx --name=rootvol logvol swap --vgname=rootvg --size=xxxxxx --name=swapvol auth --useshadow --enablemd5 %packages @core @high-availability mc drbd %post ( /bin/echo "Welcome to $HOSTNAME " > /etc/motd /bin/echo "Built from kickstart version $VER " >> /etc/motd /bin/echo " " >> /etc/motd ## sedikit tweak cat >> /etc/sysctl.conf << EOF fs.aio-max-size = 1048576 fs.file-max = 327680 net.core.rmem_max = 262144 net.core.wmem_max = 262144 net.core.rmem_default = 262144 net.core.wmem_default = 262144 net.ipv4.ip_local_port_range = 1024 65000 net.ipv4.ip_forward = 0 kernel.shmmax = 2147483648 kernel.shmmni = 4096 kernel.sem = 250 32000 100 128 EOF # Add user sesuka hati useradd -c "user cacad" -d /home/cacad cacad echo cacad | passwd --stdin cacad #edit host cat > /etc/hosts << EOF 127.0.0.1 localhost.localdomain localhost 10.0.5.1 node1.kebonbinatang.org node1 10.0.5.2 node2.kebonbinatang.org node2 10.0.5.3 node3.kebonbinatang.org node3 10.0.5.4 node4.kebonbinatang.org node4 10.0.5.5 node5.kebonbinatang.org node5 10.0.5.6 node6.kebonbinatang.org node6 10.0.5.7 node7.kebonbinatang.org node7 10.0.5.8 node8.kebonbinatang.org node8 dst EOF /sbin/chkconfig iptables off /sbin/chkconfig ip6tables off /sbin/chkconfig isdn off /sbin/chkconfig postfix off /sbin/chkconfig cman on /sbin/chkconfig iscsi off /sbin/chkconfig iscsid off /sbin/chkconfig ntpd off /sbin/chkconfig sandbox off # Turn some services on and off ) > /tmp/kickstart-install.log 2>&1
mungkin segini dulu sambil beresin dokumentasi..
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