サーバ大量構築時のキモ ～シリアルナンバーからIPアドレスを自動設定するスクリプト(Ubuntu編)～

CentOSも記述したので、こちらも同様に修正。
修正内容もCentOSのスクリプトと同様で、hostlistのキーとなる値をUUIDからシリアルナンバーに切り替えただけだ。

そのため、ここではスクリプトだけを記載する。

●setip.sh

#!/bin/sh

function get_network()
{
    local NETWORK=""
    local BROADCAST=""
    local NETMASK=""

    local IPADDR="$1"
    local MASKBIT="$2"

    local ip_array=(`echo "$IPADDR" | sed -e "s/\./ /g"`)
    local ip_index=0

    while [ $ip_index -lt 4 ]
    do
        if [ "$MASKBIT" -lt 8 ]
        then
            MASK=$((256-2**$((8-MASKBIT))))
            MASK_REV=$((~MASK%256+256))
            MASKBIT=0
        else
            MASK=255
            MASK_REV=0
            MASKBIT=$((MASKBIT - 8))
        fi

        NETWORK="${NETWORK}.$((ip_array[ip_index] & MASK))"
        BROADCAST="${BROADCAST}.$((ip_array[ip_index] | MASK_REV))"
        NETMASK="${NETMASK}.$MASK"

        ip_index=$((ip_index + 1))
    done

    NETWORK=`echo $NETWORK | sed -e "s/^\.//"`
    BROADCAST=`echo $BROADCAST | sed -e "s/^\.//"`
    NETMASK=`echo $NETMASK | sed -e "s/^\.//"`

    echo "$NETWORK $BROADCAST $NETMASK"
}

LIST="./host.list"
NIC0="eth0"
NIC1="eth1"

SCRIPT_DIR=`dirname $0`
cd $SCRIPT_DIR

MYSERIAL_CD=`dmidecode -t system | grep Serial | awk 'BEGIN { FS=": ";} { print $2}'`

IFCFGNIC0="ifcfg-${NIC0}"
IFCFGNIC1="ifcfg-${NIC1}"

if [ -z `cat $LIST | grep "$MYSERIAL_CD"` ]; then
    echo "It did not exist in [$ LIST] within [$ MYSERIAL_CD]"
    echo ""
    exit 1
fi

#Host Name
HOSTNAME=`cat $LIST | grep "$MYSERIAL_CD" | awk 'BEGIN {FS=","} { print $1 }'`

#Default Gateway
GATEWAY=`cat $LIST | grep "$MYSERIAL_CD" | awk 'BEGIN {FS=","} { print $3 }' | awk 'BEGIN {FS="/"} {print $1}'`

#NIC0
NIC0_IPADDR=`cat $LIST | grep "$MYSERIAL_CD" | awk 'BEGIN {FS=","} { print $4 }' | awk 'BEGIN {FS="/"} {print $1}'`
NIC0_PREFIX=`cat $LIST | grep "$MYSERIAL_CD" | awk 'BEGIN {FS=","} { print $4 }' | awk 'BEGIN {FS="/"} {print $2}'`
NIC0_HWADDR=`ifconfig $NIC0 | grep -e HWaddr -e ハードウェアアドレス | awk '{print $5}'`

NIC0_NEINFO=(`get_network "$NIC0_IPADDR" "$NIC0_PREFIX"`)
NIC0_NEADDR=${NIC0_NEINFO[0]}
NIC0_BRADDR=${NIC0_NEINFO[1]}
NIC0_PRMASK=${NIC0_NEINFO[2]}

#NIC1
NIC1_IPADDR=`cat $LIST | grep "$MYSERIAL_CD" | awk 'BEGIN {FS=","} { print $5 }' | awk 'BEGIN {FS="/"} {print $1}'`
NIC1_PREFIX=`cat $LIST | grep "$MYSERIAL_CD" | awk 'BEGIN {FS=","} { print $5 }' | awk 'BEGIN {FS="/"} {print $2}'`
NIC1_HWADDR=`ifconfig $NIC1 | grep HWaddr -e ハードウェアアドレス | awk '{print $5}'`

NIC1_NEINFO=(`get_network "$NIC1_IPADDR" "$NIC1_PREFIX"`)
NIC1_NEADDR=${NIC1_NEINFO[0]}
NIC1_BRADDR=${NIC1_NEINFO[1]}
NIC1_PRMASK=${NIC1_NEINFO[2]}

#create ifcfg-*
cd /etc/network/

echo "# The loopback network interface" >  interfaces
echo "auto lo"                          >> interfaces
echo "iface lo inet loopback"           >> interfaces
echo ""                                 >> interfaces

#ifcfg-NIC0
echo "# The primary network interface"  >> interfaces
echo "auto $NIC0"                       >> interfaces
echo "iface $NIC0 inet static"          >> interfaces
echo "address $NIC0_IPADDR"             >> interfaces
echo "network $NIC0_NEADDR"             >> interfaces
echo "netmask $NIC0_PRMASK"             >> interfaces
echo "broadcast $NIC0_BRADDR"           >> interfaces
echo "gateway $GATEWAY"                 >> interfaces
echo ""                                 >> interfaces

#ifcfg-NIC1
echo "# The secondery network interface" >> interfaces
echo "auto $NIC1"                       >> interfaces
echo "iface $NIC1 inet static"          >> interfaces
echo "address $NIC1_IPADDR"             >> interfaces
echo "network $NIC1_NEADDR"             >> interfaces
echo "netmask $NIC1_PRMASK"             >> interfaces
echo "broadcast $NIC1_BRADDR"           >> interfaces
echo "gateway $GATEWAY"                 >> interfaces
echo ""                                 >> interfaces

#set hostname
echo "$HOSTNAME"                        >  /etc/hostname
sed -i -e "/^127.0.1.1/c\127.0.1.1       $HOSTNAME" /etc/hosts

#Network Restart
service network-manager stop
service network-manager start

#Reboot
reboot