Add preliminary README and VM creation script

1 files changed, 48 insertions, 0 deletions

diff --git a/create-vm b/create-vm
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--- /dev/null
+++ b/create-vm
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+#!/bin/sh
+#
+# Create a new VM for liw.
+
+set -eu
+
+# Command line parameters: name of VM and base image (no .img.xz suffix).
+name="$1"
+base="$2"
+
+# Where are the base images?
+imagedir="/big/base-images"
+
+# How large are the (uncompressed) images?
+imagesize="4G"
+
+# What volume group should we use?
+vg="exolobe1-vg"
+
+# Create new LV.
+lvcreate --name "$name" --size "$imagesize" "$vg"
+lvpath="/dev/$vg/$name"
+
+# Copy uncompressed image to LV.
+unxz < "$imagedir/$base.img.xz" | pv --size "$size" > "$lvpath"
+
+# Create VM.
+virt-install -c qemu:///system \
+             --name="$name" \
+             --memory=512 \
+             --cpu=host-model-only \
+             --import \
+             --os-variant=debianwheezy \
+             --disk="path=$lvpath,cache=none" \
+             --network=network=default \
+             --graphics=spice
+
+# Get the MAC address.
+mac="$(virsh dumpxml "$name" | sed -n "/<mac address=/s/^.*'\(.*\)'.*/\1/p")"
+
+# Get IP address related to the MAC address. Append that to /etc/hosts.
+leases=/var/lib/libvirt/dnsmasq/default.leases
+ip="$(awk -v "mac=$mac" '$2 == mac { print $3 }' "$leases")"
+echo "$ip $name" >> /etc/hosts
+    
+# Log into VM, change hostname and reboot.
+echo "$name" ssh "ansible@$name" tee /etc/hostname
+ssh "ansible@$name" reboot