Add editvm.sh TEMPLATE CMD command

bin/editvm.sh

@@ -0,0 +1,120 @@
+#! /usr/bin/env bash
+
+help() {
+	echo "editvm.sh DISTRO [CMD] [ARGS]"
+	echo "  Stops the ramdisk and start editing a VM template"
+	echo "  --copy PATHSRC PATHDEST: copy PATHSRC into the container as PATHDEST"
+}
+
+KEEP=0
+
+SYSDIR="/ramdisk/sys"
+TMPDIR="/ramdisk/tmp"
+
+if [ $# -lt 2 ]; then
+	help
+	exit 0
+fi
+
+# Files to copy into container
+COPY=()
+COPYDEST=()
+
+while true; do
+	case "$1" in
+		"-h"|"--help")
+			help
+			exit 0
+			;;
+		"--copy")
+			shift
+			PATHSRC="$1"
+			if [ ! -e "$PATHSRC" ]; then
+				echo "COPY ERROR: File/Folder "$PATHSRC" does not exist."
+				exit 1
+			fi
+			shift
+			PATHDEST="$1"
+			COPY+=("$PATHSRC")
+			COPYDEST+=("$PATHDEST")
+			shift
+			;;
+		*)
+			# Optional args processing finished
+			# If no first argument is passed, syntax error
+			if [[ "$1" = "" ]]; then
+				help
+				exit 1
+			fi
+			TYPE="$1"
+			shift
+			break
+			;;
+	esac
+done
+
+if systemctl is-active ramdisk; then
+	echo "ERROR: Please stop ramdisk.service first"
+	exit 1
+fi
+
+TEMPLATE=/var/lib/lxc/"$TYPE".template
+
+if [ ! -f "$TEMPLATE" ]; then
+	echo "ERROR: No such VM type "$TYPE""
+	exit 1
+fi
+
+export VMNAME="$TYPE-TEMPLATE"
+echo "$VMNAME"
+
+export LXCROOTFS=/ramdisk/persist/$TYPE
+# Check if the rootfs exists... maybe the template actually calls another rootfs
+if [ ! -d "$LXCROOTFS" ]; then
+	echo "ERROR: The container template "$TYPE" does not have its own rootfs. Maybe it's using another rootfs?"
+	echo "Check the lxc.rootfs.path line in "$TEMPLATE" file to be sure."
+	exit 1
+fi
+
+LXCDIR=/var/lib/lxc/"$VMNAME"
+mkdir "$LXCDIR"
+envsubst < "$TEMPLATE" > "$LXCDIR"/config
+
+ROOTFS="$LXCROOTFS"
+echo "template" > "$ROOTFS"/etc/hostname
+
+# Copy files into the VM
+for fileIndex in ${!COPY[@]}; do
+	PATHSRC="${COPY[$fileIndex]}"
+	PATHDEST="$ROOTFS""${COPYDEST[$fileIndex]}"
+	# Create parent dirs
+	PARENTPATHDEST="$(dirname "$PATHDEST")"
+	mkdir -p "$PARENTPATHDEST"
+	cp --dereference -r "$PATHSRC" "$PATHDEST"
+done
+
+CMD="$1"
+shift
+
+if [[ "$CMD" != "" ]]; then
+	#lxc-execute -n "$VMNAME" -- "$CMD" "$@"
+	lxc-start -n "$VMNAME"
+	lxc-attach -n "$VMNAME" -- "$CMD" "$@"
+	if [ $KEEP -eq 0 ]; then
+		lxc-stop --kill "$VMNAME"
+		# Don't destroy VM because we want to keep the rootfs
+		# (we are just editing it live)
+		# lxc-destroy -n "$VMNAME"
+		rm -R /var/lib/lxc/"$VMNAME"
+	fi
+else
+	lxc-start -n "$VMNAME"
+	lxc-attach -n "$VMNAME" bash
+	if [ $KEEP -eq 0 ]; then
+		lxc-stop --kill "$VMNAME"
+		# Don't destroy VM because we want to keep the rootfs
+		# (we are just editing it live)
+		#lxc-destroy -n "$VMNAME"
+		rm -R /var/lib/lxc/"$VMNAME"
+	fi
+fi