File "backup_incremental.sh"

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#!/usr/bin/env bash
# # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # #
# NOTA DE LICENCA                                                             #
#                                                                             #
# Este trabalho esta licenciado sob uma Licenca Creative Commons Atribuicao-  #
# Compartilhamento pela mesma Licenca 2.5 Brasil. Para ver uma copia desta    #
# licenca, visite http://creativecommons.org/licenses/by-sa/2.5/br/           #
# ou envie uma carta para Creative Commons, 171 Second Street, Suite 300,     #
# San Francisco, California 94105, USA.                                       #
#                                                                             #
# # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # #
#                                                                             #
# Criado em 22/11/2008 - Ultima alteracao em 12/12/2008                       #
# Desenvolvido por Fabricio Vaccari Constanski                                #
# Contato pelo Email fabriciovc[em]fabriciovc.eti.br                          #
# Funcao: Script que realiza backup incremental utilizando sistema de copia   #
#         com links, reduzindo assim o espaco em disco utilizado para a       #
#         realizacao do backup e possibilitando o aumento de dias de          #
#         armazenamento dos arquivos.                                         #
#                                                                             #
# # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # #

#- COMANDOS -------------------------------------------------------------------
CP=`which cp`
CUT=`which cut`
FIND=`which find`
GREP=`which grep`
HEAD=`which head`
LS=`which ls`
MKDIR=`which mkdir`
MV=`which mv`
RM=`which rm`
RSYNC=`which rsync`
RSYNC_OPT='--delete -a'

#- DESTINO --------------------------------------------------------------------
BACKUP="/srv"
BACKUP01="${BACKUP}/backup01"
BACKUP02="${BACKUP}/backup02"
BACKUP03="${BACKUP}/backup03"

#- OPCOES DE BACKUP -----------------------------------------------------------
DATE_BKP=`date +%Y%m%d-%H`
DATE_AGO=`date --date "3 days ago" +%Y%m%d`

#- FUNCAO QUE CHECA COMANDOS --------------------------------------------------
_CHECKOK () {
if [ $? -eq 0 ]; then
  echo -e "\\033[1;32m CONCLUIDO \\033[0;39m"
else
  echo -e "\\033[1;31m FALHOU \\033[0;39m"
fi
}

#- FUNCAO DE BACKUP -----------------------------------------------------------
_BACKUP () {
echo; echo "Backup de ${HOST_NAME} iniciado em `date +%d/%m/%Y` as `date +%H:%M:%S`"

if [ -d ${CURRENT_BACKUP} ]; then 
  if [ -d ${CURRENT_BACKUP}.copia ]; then
    echo -n "Diretorio ${CURRENT_BACKUP}.copia encontrado, excluindo..."
    _CHECKOK
    ${RM} -rf ${CURRENT_BACKUP}.copia
  fi
  echo -n "Diretorio ${CURRENT_BACKUP} encontrado, renomeando para ${CURRENT_BACKUP}.copia..."
  _CHECKOK
  ${MV} ${CURRENT_BACKUP} ${CURRENT_BACKUP}.copia
fi

if [ ! -d ${BACKUP_DIR} ]; then
  ${MKDIR} -p ${BACKUP_DIR}
fi

if [ -e ${BACKUP_DIR}/last ]; then
  LAST_BACKUP=`cat ${BACKUP_DIR}/last`

  if [ -d ${LAST_BACKUP} ]; then
    echo -n "Ultimo backup encontrando, linkando arquivos..."
    ${CP} -la ${LAST_BACKUP} ${CURRENT_BACKUP}
    _CHECKOK
  fi
else
  echo -n "Nenhum backup anterior encontrado, criando diretorio para backup atual..."
  ${MKDIR} -p ${CURRENT_BACKUP}
  _CHECKOK
fi

for DIRS in ${DIRS_TO_COPY}; do
  echo -n "Iniciando backup de ${SERVER_IP}:${DIRS}..."
  ${RSYNC} ${RSYNC_OPT} ${SERVER_IP}:${DIRS} ${CURRENT_BACKUP}
  _CHECKOK
done
 
echo ${CURRENT_BACKUP} > ${BACKUP_DIR}/last

DIR=`${LS} ${BACKUP_DIR} | ${CUT} -d '-' -f 1 | ${GREP} ${DATE_AGO} | ${HEAD} -n1`

if [ "${DIR}" = "${DATE_AGO}" ]; then
  echo -n "Removendo todos os backups do dia ${DATE_AGO}..."
  ${RM} -rf ${BACKUP_DIR}/${DATE_AGO}-*
  _CHECKOK
else
  echo -n "Nenhum backup anterior para ser removido..."
  _CHECKOK
fi

echo "Backup de ${HOST_NAME} finalizado em `date +%d/%m/%Y` as `date +%H:%M:%S`"
}

#- MAQUINAS REMOTAS PARA BACKUP -----------------------------------------------
_ARQUITETO () {
HOST_NAME='ARQUITETO'
SERVER_IP='10.0.0.233'
BACKUP_DIR="${BACKUP01}/${HOST_NAME}"
CURRENT_BACKUP="${BACKUP_DIR}/${DATE_BKP}"
DIRS_TO_COPY="/boot /etc /var/www /var/lib/mysql /var/cache/bind"

_BACKUP
unset HOST_NAME SERVER_IP BACKUP_DIR CURRENT_BACKUP DIRS_TO_COPY
}

_MORPHEUS () {
HOST_NAME='MORPHEUS'
SERVER_IP='10.0.0.241'
BACKUP_DIR="${BACKUP01}/${HOST_NAME}"
CURRENT_BACKUP="${BACKUP_DIR}/${DATE_BKP}"
DIRS_TO_COPY="/boot /etc"

_BACKUP
unset HOST_NAME SERVER_IP BACKUP_DIR CURRENT_BACKUP DIRS_TO_COPY
}

_NEO () {
HOST_NAME='NEO'
SERVER_IP='172.16.1.230'
BACKUP_DIR="${BACKUP01}/${HOST_NAME}"
CURRENT_BACKUP="${BACKUP_DIR}/${DATE_BKP}"
DIRS_TO_COPY="/boot /etc /srv/ldap-base /var/lib/ldap /srv/usuarios /srv/samba/netlogon /srv/samba/profiles"

_BACKUP
unset HOST_NAME SERVER_IP BACKUP_DIR CURRENT_BACKUP DIRS_TO_COPY
}

_NIOBE () {
HOST_NAME='NIOBE'
SERVER_IP='10.0.0.242'
BACKUP_DIR="${BACKUP01}/${HOST_NAME}"
CURRENT_BACKUP="${BACKUP_DIR}/${DATE_BKP}"
DIRS_TO_COPY="/boot /etc"

_BACKUP
unset HOST_NAME SERVER_IP BACKUP_DIR CURRENT_BACKUP DIRS_TO_COPY
}

_SENTINELA () {
HOST_NAME='SENTINELA'
SERVER_IP='10.0.0.254'
BACKUP_DIR="${BACKUP01}/${HOST_NAME}"
CURRENT_BACKUP="${BACKUP_DIR}/${DATE_BKP}"
DIRS_TO_COPY="/boot /etc /var/www /var/cache/bind"

_BACKUP
unset HOST_NAME SERVER_IP BACKUP_DIR CURRENT_BACKUP DIRS_TO_COPY
}

#- BACKUPS A SEREM REALIZADOS -------------------------------------------------
_ARQUITETO
_MORPHEUS
_NEO
_NIOBE
_SENTINELA
#------------------------------------------------------------------------------