Backup Máquina do Tempo com Rsync
Publicado por Fabio Lima (última atualização em 14/04/2015)
[ Hits: 6.174 ]
Homepage: https://twitter.com/fabiolimace
Download 6194.rsync-backup_ARQUIVOS.zip
Download rsync-backup.tar.gz (versão 2)
Este script serve para fazer backups periódicos no estilo máquina do tempo (Time Machine OSX). Ele é executado a partir de uma máquina central. Essa máquina acessa outras máquinas via rsync + ssh.
Por utilizar hard-links, os backups não crescem muito.
Caso se deseje a cópia exata de um "repositório" num dia específico, basta procurar a pasta correspondente, desde que o backup tenha sido feito nesse dia.
Anexei um arquivo compactado contendo todos os arquivos necessários para rodar o script, inclusive um tutorial em PDF.
Versão 2 - Enviado por Fabio Lima em 09/04/2015
Changelog: Acrescentei informações no PDF que acompanha o script.
#!/usr/bin/env bash # # rsync-backup # Makes backups of local and remote hosts using rsync. # # Author: Fabio Lima # Date: 2015-03-28 # # Checks if the three parameters are supplied if [ -n "${1}" -a -n "${2}" -a -n "${3}" ]; then SRC_HOST="${1}"; SRC_REPO="${2}"; SRC_DIR="${3}"; else echo -e "HOW TO USE:\nrsync-backup HOST REPOSITORY PATH"; exit 1; fi; # Default backup directory. See example: # RSYNC_DIR="/mnt/backup/Automático/rsync-backup"; RSYNC_DIR="/PATH/TO/rsync-backup"; # Default backup user. RSYNC_USER="rsync-backup"; # Special directories names. # You can change it if you want. LAST_LABEL="ultimo"; FULL_LABEL="completo"; REMOVED_LABEL="removido"; DATE=$(date "+%Y-%m-%d"); TIME=$(date "+%Hh%M"); HOST_DIR="${RSYNC_DIR}/${SRC_HOST}"; REPO_DIR="${HOST_DIR}/${SRC_REPO}"; DEST_DIR="${REPO_DIR}/${DATE}"; DEST_FULL_DIR="${DEST_DIR}/${FULL_LABEL}"; DEST_REMOVED_DIR="${DEST_DIR}/${REMOVED_LABEL}-${TIME}"; LAST_DEST_DIR="${REPO_DIR}/${LAST_LABEL}"; LAST_FULL_DIR="${LAST_DEST_DIR}/${FULL_LABEL}"; RSYNC_LOG="${REPO_DIR}/rsync.log"; SCRIPT_LOG="${REPO_DIR}/rsync-backup.log"; # Checks if the source host is the local host. # If it is a remote host, rsync uses SSH authentication. if [ "${SRC_HOST}" = "$(hostname)" ]; then RSYNC_SSH_LOGIN=""; else RSYNC_SSH_LOGIN="${RSYNC_USER}@${SRC_HOST}:"; fi; # Changes multiple spaces and tabs for single spaces function fn_single_spaced { STR="${1}"; echo "${STR}" | tr -s '\t ' ' '; } # Makes a directory if it doesnt exist function fn_make_dir { NEW_DIR="${1}"; MKDIR_COMMAND=$(fn_single_spaced \ "mkdir -p \"${NEW_DIR}\";"); if [ ! -d "${NEW_DIR}" ]; then echo ${MKDIR_COMMAND}; bash -c "${MKDIR_COMMAND}"; fi; } # Copies files using hard links function fn_link_copy { COPY_SRC="${1}"; COPY_DEST="${2}"; COPY_COMMAND=$(fn_single_spaced \ "cp --archive --link \"${COPY_SRC}/\"* \"${COPY_DEST}\";"); if [ -n "${COPY_SRC}" -a -d "${COPY_SRC}" ]; then echo ${COPY_COMMAND} &>> "${SCRIPT_LOG}"; bash -c "${COPY_COMMAND}" &>> "${SCRIPT_LOG}"; fi; } # Removes empty directories. function fn_remove_empty_dirs { DIR="${1}"; FIND_COMMAND="find \"${DIR}\" -type d -empty -delete;"; RMDIR_COMMAND="rmdir --ignore-fail-on-non-empty \"${DIR}\";"; if [ -n "${DIR}" -a -d "${DIR}" ]; then echo ${FIND_COMMAND} &>> "${SCRIPT_LOG}"; bash -c "${FIND_COMMAND}" &>> "${SCRIPT_LOG}"; #echo ${RMDIR_COMMAND} # &>> "${SCRIPT_LOG}"; #bash -c "${RMDIR_COMMAND}"# &>> "${SCRIPT_LOG}"; fi; } # Checks if there are changes to be transfered function fn_has_changes { RSYNC_COMMAND=$(fn_single_spaced \ "rsync --dry-run --archive --relative --itemize-changes \ --cvs-exclude --exclude=\".*\" --exclude=\".*/\" \ ${RSYNC_SSH_LOGIN}\"${SRC_DIR}\" \ \"${LAST_FULL_DIR}\";"); if [ -d "${LAST_FULL_DIR}" ]; then echo ${RSYNC_COMMAND} &>> "${SCRIPT_LOG}"; RESULT=$(bash -c "${RSYNC_COMMAND}" ); if [ -n "${RESULT}" ]; then echo 1; else echo 0; fi; else echo 1; fi; } # Core function of this script function fn_rsync_backup { RSYNC_COMMAND=$(fn_single_spaced \ "rsync --archive --relative --itemize-changes \ --cvs-exclude --exclude=\".*\" --exclude=\".*/\" \ --compress --verbose --delete --backup \ --log-file=\"${RSYNC_LOG}\" \ --backup-dir=\"${DEST_REMOVED_DIR}\" \ ${RSYNC_SSH_LOGIN}\"${SRC_DIR}\" \ \"${DEST_FULL_DIR}\";"); SYMLINK_COMMAND=$(fn_single_spaced \ "ln --symbolic --relative --force --no-dereference \ \"${DEST_DIR}\" \"${LAST_DEST_DIR}\";"); # Create destination directories fn_make_dir "${DEST_FULL_DIR}" &>> "${SCRIPT_LOG}"; fn_make_dir "${DEST_REMOVED_DIR}" &>> "${SCRIPT_LOG}"; # Hard link copy last full directory to new full directory fn_link_copy "${LAST_FULL_DIR}" "${DEST_FULL_DIR}"; # Transfer changes using rsync echo ${RSYNC_COMMAND} &>> "${SCRIPT_LOG}"; bash -c "${RSYNC_COMMAND}" &>> "${SCRIPT_LOG}"; # Make simbolic link to new full directory echo ${SYMLINK_COMMAND} &>> "${SCRIPT_LOG}"; bash -c "${SYMLINK_COMMAND}" &>> "${SCRIPT_LOG}"; # Remove empty directories fn_remove_empty_dirs "${DEST_REMOVED_DIR}"; } function fn_main { MK_REPO=$(fn_make_dir "${REPO_DIR}"); START_DATE=$(date "+%Y-%m-%d %H:%M:%S"); echo "---------------------------------" >> "${SCRIPT_LOG}"; echo START SCRIPT: ${START_DATE} >> "${SCRIPT_LOG}"; echo "---------------------------------" >> "${SCRIPT_LOG}"; if [ -n "${REPO_DIR}" ]; then echo "${MK_REPO}" >> "${SCRIPT_LOG}"; fi; # Starts transfer only if there are chenges if [ "$(fn_has_changes)" -eq 1 ]; then fn_rsync_backup; else echo "No changes." >> "${SCRIPT_LOG}"; fi; END_DATE=$(date "+%Y-%m-%d %H:%M:%S"); echo "---------------------------------" >> "${SCRIPT_LOG}"; echo END SCRIPT: ${END_DATE} >> "${SCRIPT_LOG}"; echo "---------------------------------" >> "${SCRIPT_LOG}"; echo -e "\n\n" >> "${SCRIPT_LOG}"; } fn_main;
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