Build a PXE Server to automatically install an unattended system

Experiment: Build a PXE Server to automatically install an unattended system

Install HTTP on the PXE Server and the newly installed server to achieve load balancing.

Create a master-slave DNS Server

Step 1: Configure DHCP to assign IP addresses to hosts that require system installation.

Set the Server IP address to 192.168.100.11.

[[Email protected] ~] # Ifconfig eth0 | grep "Inet ADDR"

Inet ADDR: 192.168.100.11 bcast: 192.168.100.255 mask: 255.255.255.0

[[Email protected] ~] #

Install DHCP

[[Email protected] ~] # Yum-y install DHCP

[[Email protected] ~] # Rpm-Q DHCP

Dhcp-3.0.5-31.el5_8.1

[[Email protected] ~] #

Modify the DHCP configuration file as follows:

[[Email protected] ~] # Cat/etc/DHCPD. conf

Ddns-Update-style interim;

Next-server 192.168.100.11;

Filename "pxelinux.0 ";

Subnet 192.168.100.0 netmask 255.255.255.0 {

Option subnet-mask limit 255.0;

Option domain-name "candy.com ";

Option domain-name-servers 192.168.100.11;

Range dynamic-BOOTP 192.168.100.128 192.168.100.254;

}

[[Email protected] ~] #

Start DHCP

[[Email protected] ~] # Service DHCPD restart

Disable DHCPD: [OK]

Start DHCPD: [OK]

[[Email protected] ~] # Chkconfig DHCPD on

[[Email protected] ~] #

Step 2: configure the TFTP service

TFTP is installed by default.

[[Email protected] ~] # Rpm-Q TFTP

Tftp-0.49-2

[[Email protected] ~] # Rpm-q tftp-Server

Tftp-server-0.49-2

[[Email protected] ~] #

Start the xinetd service

[[Email protected] ~] # Vi/etc/xinetd. d/TFTP

Disable = No

[[Email protected] ~] #/Etc/init. d/xinetd restart

Stop xinetd: [OK]

Start xinetd: [OK]

[[Email protected] ~] # Chkconfig xinetd on

[[Email protected] ~] #

Copy the Kernel File and initialization file to the TFTP directory.

[[Email protected] pxeboot] # cp initrd. IMG vmlinuz/tftpboot/

[[Email protected] pxeboot] # pwd

/Media/images/pxeboot

[[Email protected] pxeboot] # cp/usr/share/syslinux/pxelinux.0/tftpboot/

[[Email protected] pxeboot] #

[[Email protected] pxeboot] # cd/tftpboot/

[[Email protected] tftpboot] # ls

Initrd. IMG Linux-install pxelinux.0 vmlinuz

[[Email protected] tftpboot] # mkdir/tftpboot/pxelinux. cfg

[[Email protected] tftpboot] #

[[Email protected] tftpboot] # cp/Media/isolinux. cfg/tftpboot/pxelinux. cfg/Default

[[Email protected] tftpboot] #

Step 3: Configure NFS sharing so that the installation source can be found during system installation.

[[Email protected]/] # mkdir-P/data/ISO/rhel5.9

[[Email protected]/] # cp-RF/MISC/CD/*/data/ISO/rhel5.9/

[[Email protected]/] # Cat/etc/exports

/Data/ISO/rhel5.9 * (RO)

[[Email protected]/] # service Portmap restart

Stop Portmap: [OK]

Start Portmap: [OK]

[[Email protected]/] # chkconfig Portmap on

[[Email protected]/] # service NFS restart

Disable NFS mountd: [failed]

Disable the NFS daemon: [failed]

Disable NFS quotas: [failed]

Start the NFS service: [OK]

Disable NFS quota: [OK]

Start the NFS daemon: [OK]

Start NFS mountd: [OK]

Stopping RPC idmapd: [OK]

Starting RPC idmapd: [OK]

[[Email protected]/] # chkconfig NFS on

[[Email protected]/] #

Step 4: Configure DNS (optional)

[[Email protected]/] # rpm-Q bind-chroot caching-nameserver

Bind-9.3.6-20.P1.el5_8.5

Bind-chroot-9.3.6-20.P1.el5_8.5

Package caching-nameserver Is Not Installed

[[Email protected]/] #

[[Email protected]/] #

[[Email protected]/] # Yum-y install caching-nameserver

[[Email protected]/] # rpm-Q bind-chroot caching-nameserver

Bind-9.3.6-20.P1.el5_8.5

Bind-chroot-9.3.6-20.P1.el5_8.5

Caching-nameserver-9.3.6-20.P1.el5_8.5

[[Email protected]/] #

[[Email protected]/] # cd/var/named/chroot/etc/

[[Email protected] etc] # cp-P named. caching-nameserver.conf named. conf

[[Email protected] etc] #

[[Email protected] etc] # diff named. caching-nameserver.conf named. conf

15c15

<Listen-on port 53 {127.0.0.1 ;};

---

> Listen-on port 53 {192.168.100.11 ;};

27, 28c27, 28

<Allow-query {localhost ;};

<Allow-query-Cache {localhost ;};

---

> Allow-query {Any ;};

> Allow-query-Cache {Any ;};

37, 38c37, 38

<Match-clients {localhost ;};

<Match-destinations {localhost ;};

---

> Match-clients {Any ;};

> Match-destinations {Any ;};

[[Email protected] etc] #

[[Email protected] named] # Cat candy.com. Zone

$ TTL 86400

@ In SOA candy.com. root.candy.com .(

2014092201; Serial (D. Adams)

3 h; refresh

15 m; retry

1 W; expiry

1D); Minimum

In NS dns1.candy.com.

Dns1 in a 192.168.100.11

$ Generate 20-30 station $ in a 192.168.100. $

[[Email protected] named] #

[[Email protected] named] # Cat candy.com. ARPA

$ TTL 86400

@ In SOA candy.com. root.candy.com .(

2014092201; Serial (D. Adams)

3 h; refresh

15 m; retry

1 W; expiry

1D); Minimum

In NS dns1.candy.com.

11 In PTR dns1.candy.com.

$ Generate 20-30 $ in PTR station $ .candy.com.

[[Email protected] named] #

[[Email protected] named] #/etc/init. d/named restart

Stop named: [OK]

Start named: [OK]

[[Email protected] named] # chkconfig named on

[[Email protected] named] #

[[Email protected] named] # host station21.candy.com 192.168.100.11

Using Domain Server:

Name: 192.168.100.11

Address: 192.168.100.11 #53

Aliases:

Station21.candy.com has address 192.168.100.21

[[Email protected] named] #

[[Email protected] named] #

[[Email protected] named] # host 192.168.100.30 192.168.100.11

Using Domain Server:

Name: 192.168.100.11

Address: 192.168.100.11 #53

Aliases:

30.100.168.192.in-ADDR. Arpa Domain Name Pointer station30.candy.com.

[[Email protected] named] #

Step 5: Configure kickstart for unattended installation

When configuring the yum library, the title in the configuration file must start with RHEL; otherwise, the software package cannot be read.

[[Email protected]/] # Yum-y install system-config-kickstart

[[Email protected] ~] # System-config-kickstart

Configure production ks. cfg file

Use http to access files

[[Email protected] ~] # Ls/var/www/html/KS. cfg

/Var/www/html/KS. cfg

[[Email protected] ~] #

To add a statement, skip the step of entering the cdkey during Automatic Installation

[[Email protected] ~] # Vi/var/www/html/KS. cfg

Key -- skip

[[Email protected] ~] #/Etc/init. d/httpd restart

Stop httpd: [OK]

Start httpd: [OK]

[[Email protected] ~] #

Modify the following file to read the KS. cfg file during installation.

[[Email protected] ~] # Vi/tftpboot/pxelinux. cfg/Default

Append Ks = http: // 192.168.100.11/KS. cfg initrd = initrd. img

[[Email protected] ~] #

Step 6: install and configure HTTP on the newly installed Machine

Create an HTML file on the PXE Server and copy it to the newly installed server.

[[Email protected] ~] # Cat/var/www/html/index.html

<HTML> <title> 2014-09-23 </title>

<Head>

<Body> </body>

</Html>

[[Email protected] ~] #

[[Email protected] ~] # SCP/var/www/html/index.html 192.168.100.21:/var/www/html/index.html

[[Email protected] ~] #

Both servers have the same name.

[[Email protected] ~] # Grep servername/etc/httpd/CONF/httpd. conf

Servername www.candy.com: 80

[[Email protected] ~] #

[[Email protected]/] # grep servername/etc/httpd/CONF/httpd. conf

Servername www.candy.com: 80

[[Email protected]/] #

Step 7: Set the slave DNS Server

Modify the primary configuration file of the primary DNS, add authorization information, and only allow updates from the DNS server

[[Email protected] ~] # Vi/var/named/chroot/etc/named. conf

Allow-transfer {192.168.100.21 ;};

[[Email protected] ~] #

Modify the zone file, add domain name resolution from the DNS server, and HTTP server domain name resolution

[[Email protected] ~] # Cat/var/named/chroot/var/named/candy.com. Zone

$ TTL 86400

@ In SOA candy.com. root.candy.com .(

2014092302; Serial (D. Adams)

3 h; refresh

15 m; retry

1 W; expiry

1D); Minimum

In NS dns1.candy.com.

In NS dns2.candy.com.

Dns1 in a 192.168.100.11

Dns2 in a 192.168.100.21

WWW in a 192.168.100.11

In a 192.168.100.21

[[Email protected] ~] #

[[Email protected] ~] # Cat/var/named/chroot/var/named/candy.com. ARPA

$ TTL 86400

@ In SOA candy.com. root.candy.com .(

2014092301; Serial (D. Adams)

3 h; refresh

15 m; retry

1 W; expiry

1D); Minimum

In NS dns1.candy.com.

In NS dns2.candy.com.

11 In PTR dns1.candy.com.

12 In PTR dns2.candy.com.

[[Email protected] ~] #

Configure the slave DNS server and add the following configuration

[[Email protected]/] # tail-10/var/named/chroot/etc/named. rfc1912.zones

Zone "candy.com" in {

Type slave;

File "Slaves/candy.com. Zero ";

Masters {192.168.100.11 ;};

};

Zone "100.168.192.in-ADDR. Arpa" in {

Type slave;

File "Slaves/candy.com. Arpa ";

Masters {192.168.100.11 ;};

};

[[Email protected]/] #

After the service is restarted, the zone file is automatically generated.

[[Email protected] 30/] #/etc/init. d/named restart

Stop named: [OK]

Start named: [OK]

[[Email protected]/] # ls/var/named/chroot/var/named/slaves/

Candy.com. Arpa candy.com. Zero

[[Email protected]/] #

Build a PXE Server to automatically install an unattended system