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#!/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 monitor the free and used space of a datastore
# -------- 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}/../../datastore/libfs.sh
# -------- Get datastore arguments from OpenNebula core ------------
DRV_ACTION=`cat -`
ID=$1
XPATH="${DRIVER_PATH}/../../datastore/xpath.rb -b $DRV_ACTION"
unset i j XPATH_ELEMENTS
while IFS= read -r -d '' element; do
XPATH_ELEMENTS[i++]="$element"
done < <($XPATH \
/DS_DRIVER_ACTION_DATA/DATASTORE/TEMPLATE/BRIDGE_LIST \
/DS_DRIVER_ACTION_DATA/DATASTORE/TEMPLATE/POOL_NAME \
/DS_DRIVER_ACTION_DATA/DATASTORE/TEMPLATE/VITASTOR_CONF)
BRIDGE_LIST="${XPATH_ELEMENTS[j++]}"
POOL_NAME="${XPATH_ELEMENTS[j++]}"
VITASTOR_CONF="${XPATH_ELEMENTS[j++]}"
HOST=`get_destination_host`
if [ -z "$HOST" ]; then
error_message "Datastore template missing 'BRIDGE_LIST' attribute."
exit -1
fi
CLI=vitastor-cli
if [ -n "$VITASTOR_CONF" ]; then
CLI="$CLI --config_path ${VITASTOR_CONF}"
fi
# ------------ Compute datastore usage -------------
MONITOR_SCRIPT=$(cat <<EOF
vitastor-cli df --json | jq -r '.[] | select(.name == "${POOL_NAME}") |
"TOTAL_MB="+(.total_raw/.raw_to_usable/1024/1024 | tostring)+
"\nUSED_MB="+(.used_raw/.raw_to_usable/1024/1024 | tostring)+
"\nFREE_MB="+(.max_available/1024/1024 | tostring)'
EOF
)
ssh_monitor_and_log $HOST "$MONITOR_SCRIPT 2>&1" "Error monitoring ${POOL_NAME} in $HOST"