#!/usr/bin/env bash

export OS_AUTH_TYPE=xxxx
export OS_AUTH_URL=xxxx
export OS_IDENTITY_API_VERSION=xxx
export OS_REGION_NAME="xxxx"
export OS_INTERFACE=public
export OS_APPLICATION_CREDENTIAL_ID=xxxx
export OS_APPLICATION_CREDENTIAL_SECRET=xxxx

TODAY=$(date +"%Y-%m-%d_%HH%M")
DAILY_RETENTION=7

PROJECT_DIR=/opt/backup
LOG_FILE=${PROJECT_DIR}/log/backup_${TODAY}.log

BCK_VOLUMES_LIST=()
BCK_SERVERS_LIST=()

echo "======================================================"  >>${LOG_FILE} 2>&1
date +"[%Y-%m-%d_%HH%M] - Listing instance to be backed up"  >>${LOG_FILE} 2>&1
echo "======================================================"  >>${LOG_FILE} 2>&1

if SERVERS=$(/usr/bin/openstack server list -f json| jq -r '.[].Name'); then

    date +"[%Y-%m-%d_%HH%M] ---> Server(s) Found"  >>${LOG_FILE} 2>&1
    for SERVER in $SERVERS
    do
        SNAPSHOT_SERVER=${SERVER}_${TODAY}

        date +"[%Y-%m-%d_%HH%M] ------> [Srv : ${SERVER}] === === Starting Backup === ==="  >>${LOG_FILE} 2>&1
        date +"[%Y-%m-%d_%HH%M] ------> [Srv : ${SERVER}] ---> Listing volumes attached"  >>${LOG_FILE} 2>&1

        if VOLUMES_ATTACHED=$(/usr/bin/openstack server volume list ${SERVER} -f json | jq -r '.[]."Volume ID"'); then

            date +"[%Y-%m-%d_%HH%M] ------> [Srv : ${SERVER}] ------> Found volumes attached"  >>${LOG_FILE} 2>&1

            for VOLUME_ATTACHED_ID in $VOLUMES_ATTACHED
            do
                VOLUME_ATTACHED_NAME=$(/usr/bin/openstack volume show ${VOLUME_ATTACHED_ID} -f json | jq -r '.name')
                BCK_VOLUME_ATTACHED_NAME=Backup_${VOLUME_ATTACHED_NAME}_${TODAY}
				
                date +"[%Y-%m-%d_%HH%M] ------> [Srv : ${SERVER}] ------> Starting Backup volume from ${VOLUME_ATTACHED_NAME} to ${BCK_VOLUME_ATTACHED_NAME}"  >>${LOG_FILE} 2>&1
				BCK_VOLUMES_LIST+=(${BCK_VOLUME_ATTACHED_NAME})
                /usr/bin/openstack volume backup create --name ${BCK_VOLUME_ATTACHED_NAME} ${VOLUME_ATTACHED_NAME} --force  >>${LOG_FILE} 2>&1
            done

        else

          date +"[%Y-%m-%d_%HH%M] ------>  [Srv : ${SERVER}] ------> No volumes attached"  >>${LOG_FILE} 2>&1

        fi

        BCK_SERVER=Backup_${SERVER}_${TODAY}
		
        date +"[%Y-%m-%d_%HH%M] ------> [Srv : ${SERVER}] ---> Starting Snapshot from ${SERVER} to ${BCK_SERVER}" >>${LOG_FILE} 2>&1
		BCK_SERVERS_LIST+=(${BCK_SERVER})
        /usr/bin/openstack server backup create --rotate ${DAILY_RETENTION} --name ${BCK_SERVER} ${SERVER} >>${LOG_FILE} 2>&1

        date +"[%Y-%m-%d_%HH%M] ------> [Srv : ${SERVER}] === === End of Backup === ==="  >>${LOG_FILE} 2>&1
    done
else
  echo "No Server found"  >>${LOG_FILE} 2>&1
fi

echo "======================================================"  >>${LOG_FILE} 2>&1
date +"[%Y-%m-%d_%HH%M] - Confirm that's all backup is OK"  >>${LOG_FILE} 2>&1
echo "======================================================"  >>${LOG_FILE} 2>&1

date +"[%Y-%m-%d_%HH%M] => Checking Backup Volumes"  >>${LOG_FILE} 2>&1

for CHECK_BCK_VOLUME in ${BCK_VOLUMES_LIST}
do
	##TODO faire une variable qui recup tous les instances sauvegardées précédements et checker 
done

date +"[%Y-%m-%d_%HH%M] => Checking Backup Instance"  >>${LOG_FILE} 2>&1
for CHECK_BCK_SERVER in ${BCK_SERVERS_LIST}
do
	##TODO faire une variable qui recup tous les instances sauvegardées précédements et checker 
done

echo "======================================================"  >>${LOG_FILE} 2>&1
date +"[%Y-%m-%d_%HH%M] - Manage Retention - keep last ${DAILY_RETENTION} Backup Volumes"  >>${LOG_FILE} 2>&1
echo "======================================================"  >>${LOG_FILE} 2>&1

date +"[%Y-%m-%d_%HH%M] => Manage Retention for Backup Volumes"  >>${LOG_FILE} 2>&1

date +"[%Y-%m-%d_%HH%M] ---> List all Backup Volumes"  >>${LOG_FILE} 2>&1
/usr/bin/openstack volume backup list -f json | jq '.[].Name'  >>${LOG_FILE} 2>&1

if OLD_VOLUMES=$(/usr/bin/openstack volume backup list -f json | jq -r '.[].Name' | sed "1,${DAILY_RETENTION}d"); then

    date +"[%Y-%m-%d_%HH%M] ---> Backup Volume(s) to be removed Found"  >>${LOG_FILE} 2>&1
    for OLD_VOLUME in $OLD_VOLUMES
    do
        date +"[%Y-%m-%d_%HH%M] ------> Remove Backup Volume ${OLD_VOLUME}"  >>${LOG_FILE} 2>&1
        /usr/local/bin/openstack volume backup delete ${OLD_VOLUME}  >>${LOG_FILE} 2>&1

    done
else
  date +"[%Y-%m-%d_%HH%M] No Old Backup Volume found"  >>${LOG_FILE} 2>&1
fi

date +"[%Y-%m-%d_%HH%M] => Manage Retention for Backup Instances"  >>${LOG_FILE} 2>&1

date +"[%Y-%m-%d_%HH%M] ---> List all Backup Instances"  >>${LOG_FILE} 2>&1
/usr/bin/openstack image list -f json| jq -r '.[].Name|select(. | startswith("Backup_"))' >>${LOG_FILE} 2>&1

if OLD_INSTANCES=$(/usr/bin/openstack image list -f json| jq -r '.[].Name|select(. | startswith("Backup_"))' | sed "1,${DAILY_RETENTION}d"); then

    date +"[%Y-%m-%d_%HH%M] ---> Backup Instance(s) to be removed Found"  >>${LOG_FILE} 2>&1
    for OLD_INSTANCE in $INSTANCES
    do
        date +"[%Y-%m-%d_%HH%M] ------> Remove Backup Instance ${OLD_INSTANCE}"  >>${LOG_FILE} 2>&1
        /usr/local/bin/openstack image delete ${OLD_INSTANCE}  >>${LOG_FILE} 2>&1

    done
else
  date +"[%Y-%m-%d_%HH%M] No Old Backup Instances found"  >>${LOG_FILE} 2>&1
fi