1 files changed, 133 insertions, 0 deletions
diff --git a/virtualenv/virt b/virtualenv/virt
new file mode 100755
index 0000000..46c56dc
--- /dev/null
+++ b/virtualenv/virt
@@ -0,0 +1,133 @@
+#!/bin/sh
+#
+# Define and install a libvirt domain
+#
+# Copyright 2013 Guilhem Moulin <guilhem@fripost.org>
+#
+# Licensed under the GNU GPL version 3 or higher.
+#
+
+set -ue
+root=$(dirname "$0")
+
+help() {
+    cat >&2 <<-EOF
+		Usage:
+		  $0 install <libvirt domain> [<QEMU image>]
+		      Install the given domain, using the given image (created if
+		      necessary) as a disk.
+		  $0 view <libvirt domain>
+		      Open a connection to a running domain using the Spice protocol
+	EOF
+    exit 1
+}
+
+get_XML_attribute() {
+    local domain="$1" object="$2" attribute="$3"
+
+    /usr/bin/virsh dumpxml "$domain" \
+    | /usr/bin/xmlstarlet sel -t -m /domain/"$object" -v @"$attribute"
+}
+
+doesExist() {
+    /usr/bin/virsh -r list --all --name | grep -qxF "$1"
+}
+isActive() {
+    /usr/bin/virsh -r list       --name | grep -qxF "$1"
+}
+
+install() {
+    [ $# -eq 1 -o $# -eq 2 ] || help
+    local name=$1
+    local disk=${2:-$root/images/${name}.qcow2}
+
+    local darch version=$(sed -n 's/^VERSION\s*=\s*//p' $root/../preseed/Makefile)
+    case "${ARCH:=$(/bin/uname -m)}" in
+        i386|i686) darch=i386;;
+        x86_64)    darch=amd64;;
+        *)         darch=$ARCH;;
+    esac
+    local cdrom="$root/../preseed/dist/$darch/debian-$version-$darch-netinst-preseeded.iso"
+
+    if doesExist "$name"; then
+        echo "Error: Domain $name already exists. If you want to replace the domain, run" >&2
+        echo >&2
+        isActive "$name" && echo "    virsh destroy  $name" >&2
+        echo "    virsh undefine $name" >&2
+        exit 1
+    fi
+    if ! [ -f "$cdrom" -a -r "$cdrom" ]; then
+        cat >&2 <<- EOF
+			Error: '$cdrom' does not exist or is not readable.
+			To create the preseeded image, run
+
+			    cd $root/../preseed
+			    ARCH=$darch make iso-preseed
+		EOF
+        exit 1
+    fi
+
+    grep -q '^kvm\s' /proc/modules || echo 'WARN: KVM not available!' >&2
+
+    if ! [ -r "$disk" -a -r "$disk" ]; then
+        local size=12G
+        echo "Creating (sparse) $size disk image '$disk'" >&2
+        /usr/bin/qemu-img create -f "${disk##*.}" \
+            -o size="$size",preallocation=metadata "$disk"
+    fi
+
+    # TODO: the bus should be chosen at random among sata,ide,scsi,usb
+    # TODO: test EFI: http://www.linux-kvm.org/page/OVMF
+    /usr/bin/virt-install -q \
+        --name      "$name" \
+        --arch      "$ARCH" \
+        --ram       128 \
+        --cdrom     "$cdrom" \
+        --disk      "$disk",cache=writeback,bus=sata \
+        --network   network=default \
+        --graphics  spice
+
+    cat >&2 <<- EOF
+		Domain '$name' has been created. As you can see in
+
+		    virsh list
+
+		it should now be up and running. To open a graphical console, run
+
+		    $0 view $name
+	EOF
+}
+
+view(){
+    [ $# -eq 1 ] || help
+    local domain="$1"
+
+    if ! doesExist "$domain"; then
+        cat >&2 <<- EOF
+			Error: Domain $domain does not exist. To create it, run
+
+			  ./virt install $domain
+		EOF
+        exit 1
+    elif ! isActive "$domain"; then
+        echo "Error: Domain $domain is not active" >&2
+        exit 1
+    fi
+
+    local type=$(get_XML_attribute "$domain" devices/graphics type)
+    local port=$(get_XML_attribute "$domain" devices/graphics port) || true
+
+    if [ "$type" != spice -o -z "$port" ]; then
+        echo "Error: Could not find a valid Spice server on domain '$domain'." >&2
+        exit 1
+    fi
+    /usr/bin/spicec -h 127.0.0.1 -p $port
+}
+
+command="${1:-}"
+shift;
+
+case "$command" in
+    install|view) $command "$@";;
+    *) help
+esac