linux 无盘安装

#!/bin/bash
#This shell script is used to install disklesImage automaticly.
#This script uses ramdisk as a root partition and uses CPIO based initramfs.
#we want to set DHCP TFTP PXE server


TFTPDIR=/tftpboot   #TFTP root directory
DHCPDFILE=/etc/dhcpd.conf   #dhcp server configuration file
TFTPFILE=/etc/xinetd.d/tftp     #TFTP server configuraton file
CONFDIR=`dirname $0`      #the directory where the script is

USAGE()
{
cat <<\EOF
        The usage of this script : diskless-install.sh [install|start|stop|restart]
        diskless-install.sh install   ------to install the disklessImage
        diskless-install.sh start     ------to start the service
        diskless-install.sh stop      ------to stop the service
        diskless-install.sh restart ------to stop then start the service
EOF
}      
   

case "$1" in

install)

    #set DHCP server
    #check out if DHCP rpm has been installed
    if [ ! -e $DHCPDFILE ]
    then
        echo "NOW,install dhcpd server with yum......"
        yum -y install dhcp
        chkconfig --level 345 dhcpd on
        service dhcpd start
    else
        echo "check dhcpd OK ."
    fi

    #configure DHCP service
    echo "configuring dhcpd service......"
    cat > /etc/dhcpd.conf << END
    ddns-update-style interim;
    ignore client-updates;

    allow booting;
    allow bootp;
    next-server 192.168.56.101;

    subnet 192.168.56.0 netmask 255.255.255.0 {
    option routers     192.168.56.101;
    range 192.168.56.1 192.168.56.254;
    default-lease-time 1200;
    max-lease-time 1800;
    option subnet-mask 255.255.255.0;
    }
    host c1 {
            server-name "server";
            hardware ethernet 00:30:23:32:45:56:56;
            fixed-address 172.18.199.102;
            filename "/tftpboot/pxelinux.0";
        }


END

    service dhcpd restart
    # check the dhcp service is started or not
    ps -e | grep dhcpd >/dev/null
    if [ $? == 0 ]
    then
        echo "The DHCPD service is OK ."
        echo "dhcpd configure done."

    else
        echo "The DHCPD service is not started,please check the system log and fix it."
        exit 113
    fi


    #set the TFTP service
    #check the TFTP server has been installed or not
    if [ -e $TFTPFILE ]
    then
        echo " The tftp server has been installed."
    else
        echo "NOW,install TFTP server with yum...."
        yum install tftp
        chkconfig --level 345 xinetd on
        srvice xinetd restart
    fi

    #setup the tftp service
    echo "configuring TFTP service......"
    cat > /etc/xinetd.d/tftp << END
    service tftp
        {      
            disable = no
            socket_type             = dgram
            protocol                = udp
            wait                    = yes
            user                    = root
            server                  = /usr/sbin/in.tftpd
            server_args             = -v -s /tftpboot
          per_source              = 11
            cps                     = 100 2
            flags                   = IPv4
    }
END

    service xinetd restart
    sleep 5
    # check the TFTP service is started or not
    netstat -antup | grep 69 >/dev/null
    if [ $? == 0 ]
    then
            echo "The TFTP service is OK ."
            echo "TFTP configure done."

    else
            echo "The TFTP service is not started,please check the system log and fix it."
            exit 114
    fi
   
    #setup local yum
    mount /dev/cdrom   /media >/dev/null
    mv /etc/yum.repos.d/* /tmp/yum.back
    cat > /etc/yum.repos.d/CentOS-Base.repo <        [ISO]
        name=ISO
        baseurl=file:///media
        gpgcheck=0
EOF
    yum clean all
    mkdir -p $TFTPDIR/installroot
    yum -y --installroot=/tftpboot/installroot install basesystem filesystem bash nfs-utils-lib nfs-utils-lib-devel yum MAKEDEV SysVinit audit-libs binutils bzip2-libs centos-release centos-release-notes chkconfig coreutils cpio cracklib cracklib-dicts crontabs db4 device-mapper device-mapper-event device-mapper-multipath dmraid dmraid-events e2fsprogs e2fsprogs-libs elfutils-libelf ethtool expat findutils gawk gdbm glib2 grep gzip hmaccalc info initscripts iproute iputils keyutils-libs kpartx krb5-libs less libacl libattr libcap libselinux libsepol libstdc++ libsysfs libxml2 logrotate lvm2 m2crypto mcstrans mingetty mkinitrd module-init-tools nash ncurses net-tools nspr nss openssl pam pcre popt procps psmisc python python-elementtree python-iniparse python-sqlite pyth-urlgrabber readline rpm rpm-libs rpm-python rsyslog sed sgpio shadow-utils sqlite tar udev util-linux yum-fastestmirror yum-metadata-parser zlib bind-libs openssl perl tar sgpio mkinitrd net-tools dhcp tftp     
    cp /etc/sysconfig/network $TFTPDIR/installroot/etc/sysconfig
    cat > $TFTPDIR/installroot/etc/sysconfig/networt-scripts/ifcfg-eth0 <    DEVICE=eth0
    BOOTPROTO=dhcp
    ONBOOT=yes
EOF

    cat > $TFTPDIR/installroot/etc/fstab <    /dev/root               /                       tmpfs   defaults        0 0
    devpts                  /dev/pts                devpts gid=5,mode=620 0 0
    sysfs                   /sys                    sysfs   defaults        0 0
    proc                    /proc                   proc    defaults        0 0
EOF
    cd $TFTPDIR/installroot
    ln -s ./sbin/init ./init
    find | cpio -ocv | gzip -9 > ../ramdisk.img

    #create the system file directory
#   echo " copy the system files to directory : $TFTPDIR"
#   cp -avf ./tftpboot/   $TFTPDIR
#   echo "file copy done."
    ;;

start)
    echo "start the dhcpd service."
    service dhcpd start
        ps -e | grep dhcpd >/dev/null
        if [ $? == 0 ]
        then
                echo "The DHCPD service is OK ."

        else
                echo "The DHCPD service is not started,please check the system log and fix it."
                exit 113
        fi

    echo "start the TFTP service."
    service xinetd start
    sleep 5
    netstat -antup | grep 69 >/dev/null
        if [ $? == 0 ]
        then
                echo "The TFTP service is OK ."

        else
                echo "The TFTP service is not started,please check the system log and fix it."
                exit 114
        fi
   
    echo "all services are started."
    ;;

stop)
    echo "stop dhcpd service."
    killall dhcpd
    echo "stop xinetd service"
    killall xinetd
    echo "all services have been killed."
    ;;

restart)   
    $0 stop
    $0 start
    ;;

*)
    USAGE
    ;;
esac