commit 4b357bee36388bb3381cd349623c21b5c299aede
Author: Dustin C. Hatch <admiralnemo@gmail.com>
Date:   Sun Sep 22 11:44:48 2013 -0500

    create-vmachine: Initial commit

diff --git a/create-vmachine.sh b/create-vmachine.sh
new file mode 100755
index 0000000..755ab1f
--- /dev/null
+++ b/create-vmachine.sh
@@ -0,0 +1,162 @@
+#!/bin/bash
+# Creates a new virtual machine from the given stage3 tarball
+
+DOMNAME="$1"
+STAGE_TBZ="$2"
+VMNAME=$(echo "${DOMNAME}" | tr '[:upper:]' '[:lower:]')
+VM_FQDN="${VMNAME}.$(hostname -d)"
+
+VG=vmachines
+POOL=LVM
+DOMXML_TMPL=/etc/libvirt/qemu/_template.xml
+MOUNTPOINT=/mnt/new_vmachine
+PUPPETMASTER=$(hostname -f)
+PORTAGE_PROFILE="default/linux/amd64/13.0"
+
+PORTDIR=$(portageq envvar PORTDIR)
+DISTDIR=$(portageq envvar DISTDIR)
+PKGDIR=$(portageq envvar PKGDIR)
+
+if [[ -z $STAGE_TBZ || -z $VMNAME ]]; then
+	echo "Usage: $(basename $0) <vmname> <stage3-tarball>" >&2
+	exit 1
+fi
+
+set -e
+
+if lvdisplay ${VG}/${VMNAME} >/dev/null 2>&1; then
+	echo "ERROR: Logical volume ${VMNAME} already exists in group ${VG}" >&2
+	exit 2
+fi
+
+echo "Creating storage volume..."
+virsh -c qemu:///system vol-create-as ${POOL} ${VMNAME} 2G
+
+echo "Creating LVM volumes..."
+pvcreate /dev/${VG}/${VMNAME}
+vgcreate ${VMNAME} /dev/${VG}/${VMNAME}
+lvcreate -nroot -L100M ${VMNAME}
+lvcreate -nhome -L200M ${VMNAME}
+lvcreate -nvar -L400M ${VMNAME}
+lvcreate -nusr -l100%FREE ${VMNAME}
+
+echo "Creating XFS filesystems..."
+for fs in root home usr var; do
+	mkfs.xfs -L$fs -q /dev/${VMNAME}/$fs
+done
+
+echo "Mounting filesystems..."
+[[ ! -d "${MOUNTPOINT}" ]] && mkdir -p "${MOUNTPOINT}"
+mount /dev/${VMNAME}/root "${MOUNTPOINT}"
+for fs in home usr var; do
+	mkdir "${MOUNTPOINT}"/$fs
+	mount /dev/${VMNAME}/$fs "${MOUNTPOINT}"/$fs
+done
+mkdir "${MOUNTPOINT}"/run
+mount -t tmpfs tmpfs "${MOUNTPOINT}"/run
+
+echo "Extracting stage tarball..."
+tar -xjpf "${STAGE_TBZ}" -C "${MOUNTPOINT}"
+
+echo "Installing critical packages..."
+# Installing packages must be done in a chroot instead of using the $ROOT
+# Portage environment variable because several ebuilds use enewuser/enewgroup
+# to create system users, which creates the user on the host system, not the
+# target system. See Gentoo bug #53269 for details on the problem.
+
+mkdir "${MOUNTPOINT}"/usr/portage
+mount -obind "${PORTDIR}" "${MOUNTPOINT}"/usr/portage
+mount -obind "${DISTDIR}" "${MOUNTPOINT}"/usr/portage/distfiles
+mount -obind "${PKGDIR}" "${MOUNTPOINT}"/usr/portage/packages
+mount -t tmpfs tmpfs "${MOUNTPOINT}"/tmp
+mount -t proc proc "${MOUNTPOINT}"/proc
+mount -t sysfs sysfs "${MOUNTPOINT}"/sys
+
+cat <<EOF > "${MOUNTPOINT}"/build-base.sh
+#!/bin/bash
+
+set -e
+
+export EMERGE_DEFAULT_OPTS="--binpkg-respect-use=y"
+export FEATURES="-news"
+
+env-update
+USE=-thin emerge -jkv xfsprogs nfs-utils lvm2
+rc-update add lvm boot
+EOF
+chmod u+x "${MOUNTPOINT}"/build-base.sh
+chroot "${MOUNTPOINT}" /build-base.sh
+rm "${MOUNTPOINT}"/build-base.sh
+
+echo "Installing Puppet..."
+cat <<EOF > "${MOUNTPOINT}"/build-puppet.sh
+#!/bin/bash
+
+set -e
+
+export EMERGE_DEFAULT_OPTS="--binpkg-respect-use=y"
+export FEATURES="-news"
+
+RUBY_TARGETS=ruby18 USE="-gdbm minimal old-output" emerge -jkv puppet
+rc-update add puppet default
+EOF
+chmod u+x "${MOUNTPOINT}"/build-puppet.sh
+chroot "${MOUNTPOINT}" /build-puppet.sh
+rm "${MOUNTPOINT}"/build-puppet.sh
+
+echo "Configuring Puppet..."
+cfg_head=$(mktemp)
+cfg_foot=$(mktemp)
+awk '/\[agent\]/ {exit} {print}' "${MOUNTPOINT}"/etc/puppet/puppet.conf > ${cfg_head}
+awk '/\[agent\]/,0' "${MOUNTPOINT}"/etc/puppet/puppet.conf > ${cfg_foot}
+cat ${cfg_head} > "${MOUNTPOINT}"/etc/puppet/puppet.conf
+cat <<EOF >> "${MOUNTPOINT}"/etc/puppet/puppet.conf
+    server = ${PUPPETMASTER}
+    pluginsync = true
+
+EOF
+cat ${cfg_foot} >> "${MOUNTPOINT}"/etc/puppet/puppet.conf
+rm ${cfg_head} ${cfg_foot}
+
+echo "Setting hostname..."
+sed -i "s/localhost/${VMNAME}/" "${MOUNTPOINT}"/etc/conf.d/hostname
+
+echo "Configuring network..."
+echo 'config_eth0="dhcp"' > "${MOUNTPOINT}"/etc/conf.d/net
+echo 'dhcpcd_eth0="-q"' >> "${MOUNTPOINT}"/etc/conf.d/net
+ln -s net.lo "${MOUNTPOINT}"/etc/init.d/net.eth0
+ln -s /etc/init.d/net.eth0 "${MOUNTPOINT}"/etc/runlevels/default/
+ln -s /etc/init.d/sshd "${MOUNTPOINT}"/etc/runlevels/default/
+
+echo "Configuring fstab..."
+cat << EOF > "${MOUNTPOINT}"/etc/fstab
+LABEL=root		/		xfs		noatime		0 1
+LABEL=usr		/usr		xfs		noatime		0 2
+LABEL=var		/var		xfs		noatime		0 2
+LABEL=home		/home		xfs		noatime		0 2
+tmpfs			/tmp		tmpfs		defaults	0 0
+EOF
+
+echo "Creating read-only root filesystem compatibility symlinks..."
+rm -f "${MOUNTPOINT}"/etc/{resolv,ntp}.conf
+rm -f "${MOUNTPOINT}"/etc/mtab
+ln -s /proc/mounts "${MOUNTPOINT}"/etc/mtab
+ln -s /run/resolv.conf "${MOUNTPOINT}"/etc/resolv.conf
+ln -s /run/ntp.conf "${MOUNTPOINT}"/etc/ntp.conf
+
+echo "Blanking root password..."
+sed -i 's/^root:.*/root::0:0:::::/' "${MOUNTPOINT}"/etc/shadow
+
+echo "Enabling serial console..."
+sed -i 's/#s0/s0/' "${MOUNTPOINT}"/etc/inittab
+
+echo "Cleaning up..."
+umount "${MOUNTPOINT}"/usr/portage/{packages,distfiles,}
+rmdir "${MOUNTPOINT}"/usr/portage
+umount "${MOUNTPOINT}"/{tmp,proc,sys,run,usr,var,home,}
+vgchange -an ${VMNAME}
+
+echo "Creating libvirt domain..."
+m4 -P -DNAME="${DOMNAME}" "${DOMXML_TMPL}" | virsh -c qemu:///system define /dev/stdin
+echo "Starting virtual machine..."
+virsh -c qemu:///system start ${DOMNAME}