mirror of
https://github.com/dustinbrun/openwebrx_docker_installation.git
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122 lines
2.7 KiB
Bash
122 lines
2.7 KiB
Bash
#!/bin/bash
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set -euo pipefail
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# === Docker Backup Script ===
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# Creates a compressed backup of a Docker directory (--backup / -b),
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# or deletes backups older than a specified number of days (--clean / -c <days>).
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# --- Configuration ---
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DEST="/home/pi/docker_backup"
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SOURCE="/home/pi/docker"
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# --- Functions ---
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show_help() {
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cat <<EOF
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Usage: $(basename "$0") [COMMAND]
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Commands (choose one):
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--backup, -b
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Create a new compressed backup of the directory: ${SOURCE}
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Example: $(basename "$0") --backup
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--clean, -c <days>
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Delete backups in ${DEST} older than <days>. <days> must be a positive integer.
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There is NO default age; this parameter is required when using --clean.
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Example: $(basename "$0") --clean 14
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--help, -h
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Show this help message.
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Notes:
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- The script must be called with exactly one command (either --backup/-b or --clean/-c <days>).
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- If you provide invalid or missing arguments, the script will exit with an error.
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EOF
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}
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is_positive_integer() {
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[[ "$1" =~ ^[1-9][0-9]*$ ]]
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}
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create_backup() {
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local current_date file_path
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current_date=$(date +"%Y%m%d_%H%M%S")
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file_path="${DEST}/${current_date}_docker.tar.gz"
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echo
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echo "Starting Docker backup at: ${current_date}"
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echo "Source: ${SOURCE}"
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echo "Destination: ${file_path}"
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echo
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mkdir -p "$DEST"
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tar -cpzf "$file_path" "$SOURCE" --checkpoint=.1000
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echo
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echo "Backup created: ${file_path}"
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echo
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echo "Contents of backup directory:"
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ls -lah "$DEST"
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}
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clean_backups() {
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local days="$1"
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if ! is_positive_integer "$days"; then
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echo "Error: <days> must be a positive integer. Got: '$days'"
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exit 1
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fi
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if [[ ! -d "$DEST" ]]; then
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echo "Error: backup directory does not exist: $DEST"
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exit 1
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fi
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echo
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echo "Deleting backups in '${DEST}' older than ${days} days..."
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echo
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find "$DEST" -type f -name "*.tar.gz" -mtime +"$days" -print -delete
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echo
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echo "Deletion complete."
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echo
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echo "Remaining backups:"
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ls -lah "$DEST" || true
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}
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# --- Main Argument Handling ---
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if [[ $# -eq 0 ]]; then
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echo "Error: no parameters provided."
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echo "Use --help or -h to see available options."
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exit 1
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fi
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case "$1" in
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--help|-h)
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show_help
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exit 0
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;;
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--backup|-b)
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if [[ $# -ne 1 ]]; then
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echo "Error: --backup / -b takes no additional arguments."
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echo "Use --help or -h to see usage."
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exit 1
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fi
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create_backup
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;;
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--clean|-c)
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if [[ $# -ne 2 ]]; then
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echo "Error: --clean / -c requires a single <days> argument (no default)."
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echo "Example: $(basename "$0") --clean 30"
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exit 1
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fi
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clean_backups "$2"
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;;
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*)
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echo "Error: unknown parameter: $1"
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echo "Use --help or -h to see available options."
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exit 1
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;;
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esac
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