Implement OpenNebula driver

opennebula/remotes/datastore/vitastor/snap_flatten

@@ -0,0 +1,71 @@
+#!/bin/bash
+
+# Vitastor OpenNebula driver
+# Copyright (c) Vitaliy Filippov, 2024+
+# License: Apache-2.0 http://www.apache.org/licenses/LICENSE-2.0
+
+# This script is used to flatten a snapshot of a persistent image
+
+# -------- Set up the environment to source common tools & conf ------------
+
+if [ -z "${ONE_LOCATION}" ]; then
+    LIB_LOCATION=/usr/lib/one
+else
+    LIB_LOCATION=$ONE_LOCATION/lib
+fi
+
+. $LIB_LOCATION/sh/scripts_common.sh
+
+DRIVER_PATH=$(dirname $0)
+
+source ${DRIVER_PATH}/../libfs.sh
+
+# -------- Get image and datastore arguments from OpenNebula core ------------
+
+DRV_ACTION=`cat -`
+ID=$1
+
+XPATH="${DRIVER_PATH}/../xpath.rb -b $DRV_ACTION"
+
+unset i XPATH_ELEMENTS
+
+while IFS= read -r -d '' element; do
+    XPATH_ELEMENTS[i++]="$element"
+done < <($XPATH \
+    /DS_DRIVER_ACTION_DATA/DATASTORE/TEMPLATE/BRIDGE_LIST \
+    /DS_DRIVER_ACTION_DATA/DATASTORE/TEMPLATE/POOL_NAME \
+    /DS_DRIVER_ACTION_DATA/IMAGE/SOURCE \
+    /DS_DRIVER_ACTION_DATA/IMAGE/TARGET_SNAPSHOT \
+    /DS_DRIVER_ACTION_DATA/DATASTORE/TEMPLATE/VITASTOR_CONF)
+
+unset i
+
+BRIDGE_LIST="${XPATH_ELEMENTS[i++]}"
+POOL_NAME="${XPATH_ELEMENTS[i++]}"
+IMAGE_NAME="${XPATH_ELEMENTS[i++]}"
+SNAP_ID="${XPATH_ELEMENTS[i++]}"
+VITASTOR_CONF="${XPATH_ELEMENTS[i++]}"
+
+DST_HOST=`get_destination_host $ID`
+
+if [ -z "$DST_HOST" ]; then
+    error_message "Datastore template missing 'BRIDGE_LIST' attribute."
+    exit -1
+fi
+
+CLI=vitastor-cli
+if [ -n "$VITASTOR_CONF" ]; then
+    CLI="$CLI --config_path ${VITASTOR_CONF}"
+fi
+
+SNAP_FLATTEN_CMD=$(cat <<EOF
+    $CLI ls --json ${IMAGE_NAME}@${SNAP_ID} | jq -e 'length > 0'
+    $CLI rm ${IMAGE_NAME}.flatten || true
+    $CLI create --pool "${POOL_NAME}" --parent ${IMAGE_NAME}@${SNAP_ID} ${IMAGE_NAME}.flatten
+    $CLI flatten ${IMAGE_NAME}.flatten
+    $CLI rm ${IMAGE_NAME} || true
+    $CLI modify ${IMAGE_NAME}.flatten --rename ${IMAGE_NAME}
+EOF
+)
+
+ssh_exec_and_log "$DST_HOST" "$SNAP_FLATTEN_CMD" "Error flattening snapshot $SNAP_ID for $IMAGE_NAME"