init commit
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mk
25
Dockerfile
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25
Dockerfile
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FROM alpine:latest
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# Install dependencies
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RUN apk update && apk add --no-cache \
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bash \
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rsync \
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coreutils \
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cronie \
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&& rm -rf /var/cache/apk/*
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# Copy backup and list scripts
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COPY backup.sh /usr/local/bin/backup.sh
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COPY list.sh /usr/local/bin/list.sh
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# Mark them executables
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RUN chmod +x /usr/local/bin/backup.sh
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RUN chmod +x /usr/local/bin/list.sh
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# Add crontab file and needed cache directory
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RUN mkdir -p /root/.cache/crontab && chmod 700 /root/.cache/crontab
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COPY crontab.txt /etc/crontabs/root
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RUN crontab /etc/crontabs/root
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# Start cron in foreground
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CMD ["/usr/sbin/crond", "-f"]
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33
README
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33
README
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#What is this
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This is a docker for a cron job that runs rsync to backup folders.
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the backup.sh is the backup script but the cronjob call list.sh which thenc calls backup.sh
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this is to make listing multiple folders easier.
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#Setup
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#Source and destination
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On docker compose you'll find volumes
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```
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volumes:
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- /path/to/sources/:/source/
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- /path/to/backups/:/backup/
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```
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change `path/to/source` and `path/to/backups` to the paths where the folders you'll want to backup are and where the backup is going to
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##List
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```
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/usr/local/bin/backup.sh /source/project1 /backup/project1-backup --keep-trash=false --rsync-delete=true
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```
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this is the list the cronjob will run.
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`/usr/local/bin/backup.sh` is just the name of the backup script, does not need change
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`/source/project1` Param 1 is the folder you want a backup of, if need change
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`/backup/project1-backup` Param 2 is the folder where the backup will go
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`--keep-trash=false` Param 3 is if a "trash" folder will be kept, this means that any file deleted from the source folder will have it's latest backup moved to a "trash" folder where it'll stay for 30 days, after that, it too will be deleted
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`--rsync-delete=true` Param 4 if used, delete flag will be called for rsync, deleting any file on backup folder that has been deleted from souce
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if both are false, then any deleted files will be kept indefinitely in the backup folder.
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#Building and running
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build with
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`docker build -t cron-backuper .`
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and use `docker compose up` to bring it up(it's easier to config volumes that way)
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122
backup.sh
Executable file
122
backup.sh
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#!/bin/bash
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############################################
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#
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# SETUP
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#
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############################################
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# Logs to file and stdout
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log() {
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local now
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now=$(date "+%Y/%m/%d %H:%M:%S")
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echo "$now - $1" | tee -a "$LOGFILE"
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}
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############################################
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#
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# ARGUMENT CHECK
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#
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############################################
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if [ "$#" -lt 2 ]; then
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echo "Usage: $0 <source_dir> <destination_dir> [--keep-trash=true|false]"
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exit 1
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fi
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SOURCE_DIR="$1"
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DESTINATION_ROOT="$2"
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DESTINATION_DIR="$DESTINATION_ROOT/backup"
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TRASH_DIR="$DESTINATION_ROOT/trash"
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LOGFILE="$DESTINATION_ROOT/backup.log"
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KEEP_TRASH=false
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RSYNC_DELETE=false
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shift 2
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while [[ $# -gt 0 ]]; do
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case "$1" in
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--keep-trash=true) KEEP_TRASH=true ;;
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--keep-trash=false) KEEP_TRASH=false ;;
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--rsync-delete=true) RSYNC_DELETE=true ;;
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--rsync-delete=false) RSYNC_DELETE=false ;;
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*)
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echo "Unknown option: $1"
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exit 1
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;;
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esac
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shift
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done
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############################################
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#
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# STARTUP
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#
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############################################
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# Create directories if they don't exist
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mkdir -p "$SOURCE_DIR" "$DESTINATION_DIR" "$TRASH_DIR"
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#Create log file if it doesn't exist
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[ -e "$LOGFILE" ] || touch "$LOGFILE"
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log "SOURCE_DIR: $SOURCE_DIR"
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log "DESTINATION_DIR: $DESTINATION_DIR"
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log "TRASH_DIR: $TRASH_DIR"
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log "LOGFILE: $LOGFILE"
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############################################
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#
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# BACKUP
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#
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############################################
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log "$SOURCE_DIR $DESTINATION_DIR"
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if rsync -ah "$SOURCE_DIR/" "$DESTINATION_DIR/" 2>>"$LOGFILE"; then
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log "Backup completed successfully"
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else
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log "Backup failed!"
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exit 1
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fi
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if [ "$KEEP_TRASH" != "true" ]; then
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log "Skipping trash operations"
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exit 0
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fi
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############################################
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#
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# MOVE DELETED FILES TO TRASH
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#
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############################################
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# Iterate over all files in DESTINATION and look for files not in SOURCE to move to TRASH
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find "$DESTINATION_DIR" -type f | while read -r dest_file; do
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# Construct the relative path of the file inside DESTINATION
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rel_path="${dest_file#$DESTINATION_DIR/}"
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#log "REL_PATH: $rel_path"
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# Construct the corresponding SOURCE file path
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source_file="$SOURCE_DIR/$rel_path"
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#log "SOURCE_FILE: $source_file"
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# If the file doesn't exist in SOURCE, move it to TRASH preserving folder structure
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if [ ! -f "$source_file" ]; then
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# Create the directory structure inside TRASH
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dest_dir=$(dirname "$TRASH_DIR/$rel_path")
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#log "DEST_DIR: $dest_dir"
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mkdir -p "$dest_dir"
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# Move the file to TRASH
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mv "$dest_file" "$TRASH_DIR/${rel_path}_$(date +%s)"
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# Updates last changed timestamp to now so 30 days counter starts on move
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touch "$TRASH_DIR/${rel_path}_$(date +%s)"
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#log "Moved: $dest_file -> $TRASH_DIR/$rel_path"
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fi
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done
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############################################
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#
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# CLEANUP
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#
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############################################
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# Remove empty directories from DESTINATION_DIR
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find "$DESTINATION_DIR" -type d -empty -delete
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# Deleting files older than 30 days from trash and cleaning up empty directories.
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find "$TRASH_DIR" -type f -mtime +30 -exec rm -f {} \;
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find "$TRASH_DIR" -type d -empty -delete
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log "Done!!"
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2
crontab.txt
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2
crontab.txt
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@@ -0,0 +1,2 @@
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0 3 * * * /usr/local/bin/list.sh >> /proc/1/fd/1 2>&1
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8
docker-compose.yml
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8
docker-compose.yml
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@@ -0,0 +1,8 @@
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services:
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backup:
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image: cron-backuper
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container_name: cron-backuper
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volumes:
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- /path/to/sources/:/source/
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- /path/to/backups/:/backup/
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command: ["/bin/sh", "-c", "crontab /etc/crontabs/root && crond -f"]
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