119 lines
2.5 KiB
Bash
119 lines
2.5 KiB
Bash
#!/usr/bin/env bash
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set -euo pipefail
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ARCHIVE_DIR="/var/lib/postgresql_archive/18/main/pg_wal"
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MIN_AGE_DAYS=7
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DRY_RUN=1
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usage() {
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cat <<'EOF'
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Usage: clean_walfiles.sh [--apply] [--archive-dir PATH] [--min-age-days N]
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Cleans PostgreSQL archive WAL files using both rules:
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1) Candidate file mtime is older than the oldest *.backup file mtime
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2) Candidate file mtime is older than N days (default: 7)
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Defaults to dry-run. Use --apply to actually delete files.
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EOF
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}
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while [[ $# -gt 0 ]]; do
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case "$1" in
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--apply)
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DRY_RUN=0
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shift
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;;
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--archive-dir)
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ARCHIVE_DIR="$2"
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shift 2
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;;
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--min-age-days)
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MIN_AGE_DAYS="$2"
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shift 2
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;;
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-h|--help)
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usage
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exit 0
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;;
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*)
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echo "Unknown argument: $1" >&2
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usage
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exit 2
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;;
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esac
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done
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if [[ ! -d "$ARCHIVE_DIR" ]]; then
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echo "Archive directory does not exist: $ARCHIVE_DIR" >&2
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exit 1
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fi
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if ! [[ "$MIN_AGE_DAYS" =~ ^[0-9]+$ ]]; then
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echo "--min-age-days must be a non-negative integer" >&2
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exit 2
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fi
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mapfile -d '' backup_files < <(find "$ARCHIVE_DIR" -maxdepth 1 -type f -name '*.backup' -print0)
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if [[ ${#backup_files[@]} -eq 0 ]]; then
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echo "No .backup files found in $ARCHIVE_DIR; nothing to do."
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exit 0
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fi
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oldest_backup=""
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oldest_backup_ts=""
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for backup_file in "${backup_files[@]}"; do
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backup_ts=$(stat -c %Y "$backup_file")
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if [[ -z "$oldest_backup_ts" || "$backup_ts" -lt "$oldest_backup_ts" ]]; then
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oldest_backup_ts="$backup_ts"
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oldest_backup="$backup_file"
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fi
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done
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age_cutoff_ts=$(date -d "$MIN_AGE_DAYS days ago" +%s)
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echo "Archive dir : $ARCHIVE_DIR"
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echo "Oldest .backup file : $oldest_backup"
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echo "Oldest .backup mtime: $oldest_backup_ts"
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echo "Age cutoff (epoch) : $age_cutoff_ts"
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declare -a files_to_delete=()
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while IFS= read -r -d '' file; do
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file_ts=$(stat -c %Y "$file")
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# Delete only when both constraints are true.
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if [[ "$file_ts" -lt "$oldest_backup_ts" && "$file_ts" -lt "$age_cutoff_ts" ]]; then
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files_to_delete+=("$file")
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fi
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done < <(find "$ARCHIVE_DIR" -maxdepth 1 -type f ! -name '*.backup' -print0)
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if [[ ${#files_to_delete[@]} -eq 0 ]]; then
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echo "No files matched cleanup criteria."
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exit 0
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fi
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echo ""
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echo "Files matching cleanup criteria (${#files_to_delete[@]}):"
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for file in "${files_to_delete[@]}"; do
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echo " $file"
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done
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if [[ "$DRY_RUN" -eq 1 ]]; then
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echo ""
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echo "Dry-run mode: no files were deleted."
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echo "Re-run with --apply to delete the files above."
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exit 0
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fi
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deleted=0
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for file in "${files_to_delete[@]}"; do
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rm -f -- "$file"
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((deleted += 1))
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done
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echo ""
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echo "Deleted $deleted file(s)."
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