Add a script to create automated btrfs guests

create-guest-qcow2-btrfs.bash

@@ -0,0 +1,168 @@
+#!/bin/bash
+
+#set -x
+
+# Copyright (C) 2014 Red Hat Inc.
+# Author <[email protected]>
+#
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 2 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program; if not, write to the Free Software
+# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+#
+
+# Script to create/install unattended Virtual Machines (with bridging)
+#
+# 1 Note: Bridging should be configured on the host to allow guests to be
+#   in the same subnet as hosts
+# 2 Creting a bridge, refer this: http://wiki.libvirt.org/page/Networking
+# 3 The kickstart file contains minimal fedora pkgs like core and text internet
+# 4 Also adds a serial console
+#
+
+
+IMAGE_HOME="/var/lib/libvirt/images"
+
+burl="http://dl.fedoraproject.org/pub"
+location1="$burl/fedora/linux/releases/19/Fedora/ARCH/os"
+location2="$burl/fedora/linux/releases/20/Fedora/ARCH/os"
+
+
+# External F20 mirror
+# http://dl.fedoraproject.org/pub/fedora/linux/releases/20/Fedora/x86_64/
+
+
+# Create a minimal kickstart file and return the temporary file name.
+# Do remember to delete this temporary file when it is no longer required.
+#
+create_ks_file()
+{
+    dist=$1
+    fkstart=$(mktemp -u --tmpdir=$(pwd) .XXXXXXXXXXXXXX)
+
+    cat << EOF > $fkstart
+install
+text
+reboot
+lang en_US.UTF-8
+keyboard us
+network --bootproto dhcp
+rootpw testpwd
+firewall --enabled --ssh
+selinux --enforcing
+timezone --utc America/New_York
+bootloader --location=mbr --append="console=tty0 console=ttyS0,115200 rd_NO_PLYMOUTH"
+zerombr
+clearpart --all --initlabel
+autopart --type=btrfs
+
+%packages
+@core
+%end
+EOF
+    echo "$fkstart"
+}
+
+create_guest()
+{
+    name=$1
+    arch=$2
+    dist=$3
+    locn=$4
+    dimg=$5
+    fkst=$(create_ks_file $dist)
+    bnam=$(basename $fkst)
+
+    echo "Creating domain $name..."
+    echo "Disk image will be created at: $dimg"
+
+    # Create the qcow2 disk image with preallocation and 'fallocate'
+    # (which pre-allocates all the blocks to a file) it for maximum
+    # performance.
+    #
+    #   fallocate -l `ls -al $diskimage | awk '{print $5}'` $diskimage
+    #
+    echo "Creating qcow2 disk image..."
+    qemu-img create -f qcow2 -o preallocation=metadata $dimg 10G
+    echo `ls -lash $dimg`
+
+    virt-install --connect=qemu:///system \
+    --network=bridge:virbr0 \
+    --initrd-inject=$bnam \
+    --extra-args="ks=file:/$bnam console=tty0 console=ttyS0,115200" \
+    --name=$name \
+    --disk path=$dimg,format=qcow2,cache=none \
+    --ram 2048 \
+    --vcpus=2 \
+    --check-cpu \
+    --accelerate \
+    --cpuset auto \
+    --os-type linux \
+    --os-variant $dist \
+    --hvm \
+    --location=$locn \
+    --nographics \
+    --console=pty
+
+    rm $fkst
+    return 0
+}
+
+# main
+{
+    # check if min no. of arguments are 3
+    #
+    if [ "$#" != 3 ]; then
+        echo -e "Usage: $0 vm-name distro arch\n"
+        echo -e "\tdistro: f19 f20"
+        echo -e "\t  arch: i386, x86_64
+        e.g. ./`basename $0` f20vm1 f20 x86_64         # create fedora 20 VM
+             ./`basename $0` f19vm1 f19 x86_64         # create fedora f19 VM"
+
+        exit 255
+    fi
+
+    # check if Linux bridging is configured
+    #
+    show_bridge=`brctl show | awk 'NR==2 {print $1}'`
+    if [ $? -ne 0 ] ; then
+        echo "Bridged Networking is not configured. " \
+             "please do so if your guest needs an IP similar to your host."
+        exit 255
+    fi
+
+    name=$1
+    dist=$2
+    arch=$3
+    dimg="$IMAGE_HOME/$name.qcow2"
+
+    locn=""
+    case "$dist" in
+        f19)
+            dist="fedora19"
+            locn=${location1/ARCH/$arch}
+            ;;
+
+        f20)
+            dist="fedora20"
+            locn=${location2/ARCH/$arch}
+            ;;
+
+
+            *)
+            echo "$0: invalid distribution name"
+            exit 255
+    esac
+    create_guest $name $arch $dist $locn $dimg
+
+    exit 0
+}