Step 1:
Install necessary packages on CentOS.
yum -y install wget syslinux syslinux-tftpboot xinetd \ tftp-server tftp dhcp httpd openssh-clients
Step 2:
Create the anaconda directory structure.
mkdir -p /export/anaconda/iso/CentOS mkdir -p /export/anaconda/media mkdir -p /export/anaconda/media/CentOS-6.4-x86_64 mkdir -p /export/anaconda/media/CentOS-6.4-i386 mkdir -p /export/anaconda/tftpboot mkdir -p /export/anaconda/tftpboot/pxelinux.cfg mkdir -p /export/anaconda/tftpboot/CentOS-6.4-x86_64 mkdir -p /export/anaconda/tftpboot/CentOS-6.4-i386 mkdir -p /export/anaconda/postinstall/ mkdir -p /export/anaconda/cfg/ ln -s /export/anaconda /anaconda
Step 3:
Modify tftp server configuration.
cd /etc/xinetd.d diff tftp tftp.bak 13,14c13,14 < server_args = -s /export/anaconda/tftpboot < disable = no --- > server_args = -s /var/lib/tftpboot > disable = yes
Step 4:
Modify dhcp server configuration.
cd /etc/dhcp
cat dhcpd.conf
subnet 192.168.1.0 netmask 255.255.255.0 {
option routers 192.168.1.1;
option domain-name-servers 8.8.8.8;
option subnet-mask 255.255.255.0;
range 192.168.1.240 192.168.1.250;
next-server 192.168.1.10;
filename "pxelinux.0";
}
Step 5:
Copy CentOS iso and extract the files.
scp CentOS-6.4-i386-minimal.iso root@192.168.1.10:/export/anaconda/iso/CentOS cd /export/anaconda/tftpboot/CentOS-6.4-i386 mount -o loop /export/anaconda/iso/CentOS/CentOS-6.4-i386-minimal.iso /mnt cp -Rp /mnt/* ./ umount /mnt
Step 6:
Configure the boot menu.
cat /export/anaconda/tftpboot/pxelinux.cfg/default
timeout 3600
default menu.c32
menu title Boot Menu
label 1
menu label ^ 1) CentOS-6.3-x86_64 (64-bit)
kernel CentOS-6.4-x86_64/vmlinuz
append initrd=CentOS-6.4-x86_64/initrd.img ramdisk_size=15491 ip=dhcp ksdevice=bootif \
ks=http://192.168.1.10/anaconda/cfg/CentOS-6.4-x86_64-ks.cfg
IPAPPEND 2
label 2
menu label ^ 2) CentOS-6.4-i386 (32-bit)
kernel CentOS-6.4-i386/vmlinuz
append initrd=CentOS-6.4-i386/initrd.img ramdisk_size=15491 ip=dhcp ksdevice=bootif \
ks=http://192.168.1.10/anaconda/cfg/CentOS-6.4-i386-ks.cfg
IPAPPEND 2
label 3
menu label ^ 3) Rescue CentOS-6.4-x86_64 (64-bit)
kernel CentOS-6.4-x86_64/vmlinuz
append initrd=CentOS-6.4-x86_64/initrd.img ramdisk_size=15491 ip=dhcp \
repo=http://192.168.1.10/anaconda/CentOS-6.4-x86_64 lang=en_US.UTF-8 keymap=us rescue
label 4
menu label ^ 4) Rescue CentOS-6.4-i386 (32-bit)
menu default
kernel CentOS-6.4-i386/vmlinuz
append initrd=CentOS-6.4-i386/initrd.img ramdisk_size=15491 ip=dhcp \
repo=http://192.168.1.10/anaconda/CentOS-6.4-i386 lang=en_US.UTF-8 keymap=us rescue
Step 7:
Configure apache.
cat /etc/httpd/conf.d/anaconda.conf Alias /anaconda/cfg /export/anaconda/cfgOptions Indexes FollowSymLinks Allow from All Alias /anaconda/postinstall /export/anaconda/postinstallOptions Indexes FollowSymLinks Allow from All Alias /anaconda /export/anaconda/mediaOptions Indexes FollowSymLinks Allow from All
Step 8:
Modify the kickstart files.
cat CentOS-6.4-i386-ks.cfg install # Specifies the language lang en_US.UTF-8 # Specifies the keyboard layout keyboard us # Skip Red Hat subscriber key input key --skip # Forces the text installer to be used (saves time) text # Forces the cmdline installer to be used (debugging) #cmdline # Skips the display of any GUI during install (saves time) skipx # Used with an HTTP install to specify where the install files are located url --url http://192.168.1.10/anaconda/CentOS-6.4-i386 # Assign a static IP address upon first boot & set the hostname network --device eth0 --onboot yes --bootproto static --ip=192.168.1.13 \ --netmask=255.255.255.0 --gateway=192.168.1.1 --nameserver=8.8.8.8 # Give the second interface a DHCP address (if you are not using a second interface comment this line out) network --device eth1 --onboot yes --bootproto static --ip=172.16.0.13 \ --netmask=255.255.0.0 # Set the root password rootpw password # Need a repo as only the minimal iso was used repo --name=es --baseurl=http://linux.mirrors.es.net/centos/6/os/i386/ # Enable the firewall and open port 22 for SSH remote administration firewall --enabled --port=22:tcp # Setup security and SELinux levels authconfig --enableshadow --passalgo=sha512 selinux --disabled # Set the timezone timezone --utc Etc/UTC # Create the bootloader in the MBR with drive sda being the drive to install it on bootloader --location=mbr --driveorder=sda,sdb --append=audit=1 # Wipe all partitions and build them with the info below clearpart --all --initlabel #Disk partitioning information zerombr # Create primary partitions part /boot --fstype ext4 --size=512 --asprimary --ondisk=sda part swap --size=256 --asprimary --ondisk=sda part pv.01 --size=4096 --grow --asprimary --ondisk=sda # Create LVM logical volumes volgroup system --pesize=4096 pv.01 logvol / --vgname=system --size=3000 --grow --name=root_vol # reboot when installation completes reboot # Install the Core software packages, aka "minimal", plus a couple extras %packages %end %pre # redirect debugging output to tty3 #exec < /dev/tty3 > /dev/tty3 #chvt 3 %post --log=/var/tmp/install.log # redirect debugging output to tty3 #exec < /dev/tty3 > /dev/tty3 #chvt 3 echo "Creating CentOS-6.4-i386 post installation directory ..." mkdir -p /opt/postinstall echo "Downloading CentOS-6.4-i386 post installation files ..." cd /opt/postinstall wget http://192.168.1.10/kickstart/postinstall/CentOS-6.4-i386-postinstall.tgz tar zxf CentOS-6.4-i386-postinstall.tgz rm CentOS-6.4-i386-postinstall.tgz > /dev/null 2>&1 echo "Executing CentOS-6.4-i386 post installation script ..." ./CentOS-6.4-i386-postinstall >> CentOS-6.4-i386-postinstall.out 2>&1 echo "Done."
Step 9:
Finish configuring pxe.
cp /usr/share/syslinux/pxelinux.0 /export/anaconda/tftpboot/ cp /usr/share/syslinux/menu.c32 /export/anaconda/tftpboot/
Step 10:
Enable services.
chkconfig dhcpd on chkconfig httpd on chkconfig xinetd on service dhcpd restart service httpd restart service xinetd restart
Step 11:
Start the server. The only option that will need to be specified is on the initial pxe boot menu.
Once selected, the system should perform an unattended install, requiring no user interaction.
After it completes, the system will reboot and present a login screen for the newly installed system.
And the new system is up with the packages and ip addresses specified in the kickstart file.
#ifconfig
eth0 Link encap:Ethernet HWaddr 00:0C:29:75:23:1D
inet addr:192.168.1.13 Bcast:192.168.1.255 Mask:255.255.255.0
inet6 addr: fe80::20c:29ff:fe75:231d/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:70 errors:0 dropped:0 overruns:0 frame:0
TX packets:62 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:8224 (8.0 KiB) TX bytes:13776 (13.4 KiB)
eth1 Link encap:Ethernet HWaddr 00:0C:29:75:23:27
inet addr:172.16.0.13 Bcast:172.16.255.255 Mask:255.255.0.0
inet6 addr: fe80::20c:29ff:fe75:2327/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:2 errors:0 dropped:0 overruns:0 frame:0
TX packets:12 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:120 (120.0 b) TX bytes:720 (720.0 b)
The system can easily be modified to specify different kickstart files for different types of servers. For example, there could be an option for "Directory Server", "LAMP Server", or "Database Server", all pointing to different kickstart files, and each file specifying the required packages, as well as any necessary post installation configurations. For example:
No comments:
Post a Comment