create_lxc.sh

#!/bin/sh

if [ $# -ne 2 ]; then
        echo "Usage: `basename $0` name ip"
        exit 1
fi

TEMPLATE=${TEMPLATE:-"alpine"}
NAME=$1
IP=$2
LXC_PATH=/srv/virt/lxc/
DHCP_HOSTS=/srv/virt/dhcp-hosts

if [ -d $LXC_PATH/$NAME ]; then
        echo "$NAME already exists. Please choose another container name"
        exit 2
fi

if `grep -q $IP $DHCP_HOSTS`; then
        echo "$IP is already taken. Please choose another IP for $NAME"
        exit 2
fi

echo " → Creating LXC"
lxc-create -n $NAME -t $TEMPLATE

if [ $? -ne 0 ]; then
        echo "\`lxc-create -n $NAME -t $TEMPLATE\` failed."
        exit 3
fi

echo " → Configuring dnsmasq"
HW_ADDR=`grep lxc.network.hwaddr $LXC_PATH/$NAME/config | sed 's/lxc.network.hwaddr = //'`
echo "$HW_ADDR,$IP,$NAME" >> $DHCP_HOSTS
echo "$IP       $NAME" >> /etc/hosts
service dnsmasq reload

echo " → Creating service"
ln -s lxc /etc/init.d/lxc.$NAME
echo -e "\n     type \`service lxc.$NAME start\` to start the LXC\n"