#!/bin/bash
#####################################################################
#
# rem-bu
#
# A simple shell script to retrieve selected remote server directories
# in order to integrate the remote files into the local homelab
# backup solution.
#
# Rsync is used so that only changed files are retrieved on subsequent
# runs of the backup script.
#
#####################################################################

# Directory variables
buDir="/opt/remote_backups"
buLogDir="${buDir}/logs"
buHosts="${buDir}/bu-hosts"
buLists="${buDir}/bu-lists"

# current date/time for logfile
curDate=$(date +"%Y%m%d-%H%M%S")

# list of remote hosts to backup
hostList=$(ls -1 ${buHosts}/.)

# loop through for each host
for host in $hostList
do
    # host specific variables 
    buSSH=$(cat ${buHosts}/${host})
    buList=$(cat ${buLists}/${host}_bu-list)
    buHostDir="${buDir}/backups/${host}"
    buHostLog="${host}_${curDate}.log"

    # create host directory if required
    if [ ! -d "$buHostDir" ]
    then
        mkdir -p $buHostDir
    fi

    # loop through backup directories for current host
    for i in $buList
    do
        dstDir="${buHostDir}${i}"

        # create current dir backup path if required
        if [ ! -d "$dstDir" ]
        then
            mkdir -p $dstDir
        fi

        # rsync remote files to local backup dir
        rsync -av -e "${buSSH}" --delete root@${host}:${i}/* ${dstDir}/ >>${buLogDir}/${buHostLog} 2>&1
    done
done

# EOF