185 lines
4.6 KiB
Bash
185 lines
4.6 KiB
Bash
#!/bin/bash
|
|
#
|
|
# Bashup - A set of bash scripts for managing backups.
|
|
# https://git.stack-source.com/msb/bashup
|
|
# MIT License Copyright (c) 2021 Matthew Saunders Brown
|
|
|
|
# retention vars
|
|
retention_years=0;
|
|
retention_months=3;
|
|
retention_weeks=5;
|
|
retention_days=7;
|
|
# backup storage directory
|
|
backup_storage_dir='/mnt/backups';
|
|
# directories to be backed up
|
|
backup_dirs=('/etc' '/home' '/srv' '/root' '/usr/local' '/var/www');
|
|
|
|
# check for local config, which can be used to override any of the above
|
|
if [[ -f /usr/local/etc/bashup.cnf ]]; then
|
|
source /usr/local/etc/bashup.cnf
|
|
fi
|
|
|
|
if [ ! -d $backup_storage_dir ]; then
|
|
echo "ERROR: Backup storage dir ($backup_storage_dir) does not exist."
|
|
exit 1
|
|
fi
|
|
|
|
# check if backup_storage_dir is a mount in fstab
|
|
grep -qs " $backup_storage_dir " /etc/fstab
|
|
if [ $? -eq 0 ]; then
|
|
# check if backup_storage_dir is already mounted
|
|
grep -qs " $backup_storage_dir " /proc/mounts
|
|
if [ $? -ne 0 ]; then
|
|
# attempt to mount backups
|
|
mount $backup_storage_dir
|
|
# re-check for backups mount
|
|
grep -qs " $backup_storage_dir " /proc/mounts
|
|
if [ $? -ne 0 ]; then
|
|
echo "ERROR: failed to mount $backup_storage_dir"
|
|
exit 1
|
|
fi
|
|
fi
|
|
fi
|
|
|
|
# set more vars based on above settings
|
|
today=$(date +%Y%m%d)
|
|
existing_backups=($(ls $backup_storage_dir|grep -v lost+found))
|
|
# remove today from existing backups, if it exists. we do other checks later to avoid re-doing backups
|
|
if [[ " ${existing_backups[@]} " =~ " ${today} " ]]; then
|
|
unset 'existing_backups[-1]';
|
|
fi
|
|
|
|
# create retention array
|
|
declare -a retention_array
|
|
|
|
# set retention days
|
|
if [ $retention_days -gt 0 ]; then
|
|
i="0"
|
|
while [ $i -lt $retention_days ]; do
|
|
DATE=`date --date="$i day ago" +%Y%m%d`
|
|
retention_array[$DATE]="$DATE"
|
|
i=$[$i+1]
|
|
done
|
|
fi
|
|
|
|
# set retention weeks
|
|
if [ $retention_weeks -gt 0 ]; then
|
|
i="0"
|
|
while [ $i -lt $retention_weeks ]; do
|
|
i=$[$i+1]
|
|
DATE=`date --date="sunday - $i week" +%Y%m%d`
|
|
retention_array[$DATE]="$DATE"
|
|
done
|
|
fi
|
|
|
|
# set retention months
|
|
if [ $retention_months -gt 0 ]; then
|
|
i="0"
|
|
while [ $i -lt $retention_months ]; do
|
|
DATE=`date --date="$i month ago" +%Y%m01`
|
|
retention_array[$DATE]="$DATE"
|
|
i=$[$i+1]
|
|
done
|
|
fi
|
|
|
|
# set retention years
|
|
if [ $retention_years -gt 0 ]; then
|
|
i="0"
|
|
while [ $i -lt $retention_years ]; do
|
|
DATE=`date --date="$i year ago" +%Y0101`
|
|
retention_array[$DATE]="$DATE"
|
|
i=$[$i+1]
|
|
done
|
|
fi
|
|
|
|
# create backup for today
|
|
if [[ " ${retention_array[@]} " =~ " ${today} " ]]; then
|
|
|
|
# create backup (date) dir if it doesn't already exist
|
|
if [[ ! -d "$backup_storage_dir/$today" ]]; then
|
|
|
|
mkdir $backup_storage_dir/$today
|
|
|
|
fi
|
|
|
|
# only proceed if files have not already been backed up
|
|
if [[ ! -d "$backup_storage_dir/$today/files" ]]; then
|
|
|
|
# create files backup dir
|
|
mkdir $backup_storage_dir/$today/files
|
|
|
|
for dir in "${backup_dirs[@]}"; do
|
|
|
|
#only proceed if source dir exits
|
|
if [[ -d $dir ]]; then
|
|
|
|
# only proceed if dir has not already been backed up
|
|
if [[ ! -d $backup_storage_dir/$today/files$dir ]]; then
|
|
|
|
# check if existing_backups is not empty, and if so if the dir to back up exists in the previous backup
|
|
if [[ ${existing_backups[@]} && -d $backup_storage_dir/${existing_backups[-1]}/files$dir ]]; then
|
|
|
|
# make parent destination dir, if it doesn't exist
|
|
if [[ ! -d $backup_storage_dir/$today/files`dirname $dir` ]]; then
|
|
|
|
mkdir -p $backup_storage_dir/$today/files`dirname $dir`
|
|
|
|
fi
|
|
|
|
# create a hard-link copy of the backup before doing rsync
|
|
cp --archive --link $backup_storage_dir/${existing_backups[-1]}/files$dir $backup_storage_dir/$today/files$dir
|
|
|
|
fi
|
|
|
|
# backup up files with rsync, updating existing hard link copy if it exists
|
|
rsync --relative --archive --numeric-ids --one-file-system --delete $dir $backup_storage_dir/$today/files
|
|
|
|
fi
|
|
|
|
else
|
|
|
|
echo "NOTICE: Dir $dir does not exist, can not perform backup."
|
|
|
|
fi
|
|
|
|
done
|
|
|
|
fi
|
|
|
|
fi
|
|
|
|
# remove expired backups
|
|
for existing_backup in "${existing_backups[@]}"; do
|
|
|
|
if [[ " ${retention_array[@]} " =~ " ${existing_backup} " ]]; then
|
|
|
|
# keep $existing_backup, do nothing
|
|
one=1;
|
|
|
|
else
|
|
|
|
if [[ -d $backup_storage_dir/$existing_backup/files ]]; then
|
|
|
|
rm -r $backup_storage_dir/$existing_backup/files
|
|
|
|
fi
|
|
|
|
if [[ -z "$(ls -A $backup_storage_dir/$existing_backup)" ]]; then
|
|
|
|
rm -r $backup_storage_dir/$existing_backup
|
|
|
|
fi
|
|
|
|
fi
|
|
|
|
done
|
|
|
|
# check if backup_storage_dir is mounted and unmount if so
|
|
grep -qs " $backup_storage_dir " /proc/mounts
|
|
if [ $? -eq 0 ]; then
|
|
umount $backup_storage_dir
|
|
fi
|
|
|
|
exit 0
|
|
|