Add option to skip snapshot cycles

This patch adds a new option for ignoring the snapshot_cycle command.
Instead of shutting down the machine, taking a snapshot and rebooting it
again, the next script in the list is immediately executed. Only
snapshots created with the snapshot_cycle command are affected.

This speeds up the build time for the cluster considerably.

The patch also starts the network interfaces in init_xxx_node to have
them ready for the next script without having to reboot the machine.

Change-Id: I12a11144113a1fcde60a64a525e2217f4a758577

labs/osbash/lib/osbash/functions-host.sh

@@ -345,6 +345,10 @@ function command_from_config {
             vm_wait_for_shutdown "$vm_name"
             ;;
         snapshot_cycle)
+            # Skip command if user disabled snapshot cycles
+            if [ "${SNAP_CYCLE:-}" = "no" ]; then
+                continue
+            fi
             # Format: snapshot_cycle [-g <gui_type>] [-n <node_name>]
             # comprises shutdown, boot, wait_for_shutdown, snapshot
             get_cmd_options $args

labs/osbash/osbash.sh

@@ -38,6 +38,7 @@ function usage {
     echo "-g GUI     GUI type during build"
     #echo "-e EXPORT Export node VMs"
     echo "--no-color Disables colors during build"
+    echo "--no-snap-cycle Disables snapshot cycles during build"
     echo
     echo "TARGET     basedisk: build configured basedisk"
     echo "           cluster : build OpenStack cluster [all nodes]"
@@ -60,6 +61,10 @@ function print_config {
         echo -e "${CInfo:-}Distribution name: ${CData:-} $(get_distro_name "$DISTRO")${CReset:-}"
     fi
 
+    if [ "${SNAP_CYCLE:-}" = "no" ]; then
+        echo -e "${CInfo:-}Skipping snapshot cycles.${CReset:-}"
+    fi
+
     if [ -n "${EXPORT_OVA:-}" ]; then
         echo "Exporting to OVA: ${EXPORT_OVA}"
     elif [ -n "${EXPORT_VM_DIR:-}" ]; then
@@ -115,6 +120,9 @@ while getopts :be:g:-:hnt:w opt; do
                 no-color)
                     unset CError CStatus CInfo CProcess CData CMissing CReset
                     ;;
+                no-snap-cycle)
+                    SNAP_CYCLE="no"
+                    ;;
                 help)
                     usage
                     ;;

labs/osbash/scripts/osbash/init_xxx_node.sh

@@ -29,3 +29,7 @@ echo "$NODE_NAME" | sudo tee /etc/hostname > /dev/null
 
 # Configure network interfaces
 config_network
+
+for iface in $(ip -o link show|grep -o "eth[[:digit:]]"); do
+    sudo ifup "$iface"
+done