FreeBSD image: fix environment, mktemp disk image

opennebula-images/freebsd-build-opennebula-image.sh

@@ -8,9 +8,13 @@ set -x
 
 # XXX: Handle command-line arguments?
 RELEASE=12.1-RELEASE
+ARCH=amd64
 IMAGE_PATH=freebsd-$RELEASE-$(date +%+F).img.qcow2
 IMAGE_SIZE=10G
 
+DIST_BASE="https://download.freebsd.org/ftp/releases/$ARCH/$RELEASE"
+PORTS_BASE="https://download.freebsd.org/ftp/snapshots/$ARCH/12.1-STABLE"
+
 # TODO: find the package definition and built ourself, publish in some RPM repository.
 ONE_CONTEXT_RPM_URL="https://github.com/OpenNebula/addon-context-linux/releases/download/v5.10.0/one-context-5.10.0-1.el8.noarch.rpm"
 ONE_CONTEXT_RPM_PATH=/root/one-context.rpm
@@ -29,8 +33,9 @@ if [ "$(whoami)" != 'root' ]; then
 fi
 
 # Allocate and partition/format disk image.
-truncate -s 6G disk.img
-mdconfig -a -t vnode -f disk.img -u md0
+disk=$(mktemp)
+truncate -s 6G $disk
+mdconfig -a -t vnode -f $disk -u md0
 gpart create -s gpt /dev/md0
 gpart add -t freebsd-boot -l bootfs -b 40 -s 512K md0
 gpart bootcode -b /boot/pmbr -p /boot/gptboot -i 1 md0
@@ -44,12 +49,12 @@ mount -t devfs devfs /mnt/dev
 
 # Download and extract base system.
 dist_files="kernel.txz base.txz"
-dist_dir="/usr/freebsd-dist/$arch/$release"
+dist_dir="/usr/freebsd-dist/$ARCH/$RELEASE"
 
 mkdir -p "$dist_dir"
 for f in $dist_files
 do
-	fetch -m -o "$dist_dir/$f" "$dist_base/$f"
+	fetch -m -o "$dist_dir/$f" "$DIST_BASE/$f"
 	tar -C /mnt -xJf "$dist_dir/$f"
 done
 
@@ -83,11 +88,11 @@ FreeBSD: {
 EOF
 
 # freebsd-update is only supported for RELEASE
-if [ "${release%-RELEASE}" != "$release" ]
+if [ "${release%-RELEASE}" != "$RELEASE" ]
 then
 	env PAGER=true /usr/sbin/freebsd-update \
 		-b /mnt \
-		--currently-running "$release" \
+		--currently-running "$RELEASE" \
 		--not-running-from-cron -F \
 		fetch install
 fi
@@ -95,15 +100,15 @@ fi
 env ASSUME_ALWAYS_YES=YES pkg -c /mnt bootstrap -f
 env ASSUME_ALWAYS_YES=YES pkg -c /mnt install bash
 
-fetch -m -o "$dist_dir/ports.txz" "$ports_base/ports.txz"
+fetch -m -o "$dist_dir/ports.txz" "$PORTS_BASE/ports.txz"
 tar -C /mnt -xJf "$dist_dir/ports.txz"
 
 cleanup
 trap : EXIT
 
-mkdir -p "$arch"
-qemu-img convert -f raw -O qcow2 disk.img "$arch"/root.img.qcow2
-rm disk.img
+mkdir -p "$ARCH"
+qemu-img convert -f raw -O qcow2 $disk "$ARCH"/root.img.qcow2
+rm $disk
 
 # Filesystem will be enlarged by growfs(7) on next startup
 qemu-img resize $IMAGE_PATH $IMAGE_SIZE