104 lines
2.9 KiB
Bash
104 lines
2.9 KiB
Bash
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#!/usr/bin/env bash
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# Nexus — MySQL Auto-Backup Script
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# Usage: Add to crontab for daily 3AM backup
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# 0 3 * * * /path/to/nexus/deploy/db_backup.sh >> /var/log/nexus_backup.log 2>&1
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#
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# Reads DATABASE_URL from .env for connection parameters.
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# Retains backups for 30 days, auto-deletes older ones.
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set -euo pipefail
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SCRIPT_DIR="$(cd "$(dirname "$0")" && pwd)"
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PROJECT_DIR="$(dirname "$SCRIPT_DIR")"
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ENV_FILE="$PROJECT_DIR/.env"
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BACKUP_DIR="$PROJECT_DIR/backups"
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RETENTION_DAYS=30
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# ── Load .env ──
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if [ ! -f "$ENV_FILE" ]; then
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echo "[$(date)] ERROR: .env not found at $ENV_FILE"
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exit 1
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fi
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# Parse DATABASE_URL from .env
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# Format: mysql+asyncmy://user:password@host:port/dbname
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DB_URL=$(grep -E '^NEXUS_DATABASE_URL=' "$ENV_FILE" | head -1 | cut -d= -f2- | tr -d '"' | tr -d "'")
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if [ -z "$DB_URL" ]; then
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DB_URL=$(grep -E '^DATABASE_URL=' "$ENV_FILE" | head -1 | cut -d= -f2- | tr -d '"' | tr -d "'")
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fi
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if [ -z "$DB_URL" ]; then
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echo "[$(date)] ERROR: DATABASE_URL not found in .env"
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exit 1
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fi
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# Parse mysql URL: mysql+asyncmy://user:pass@host:port/dbname → user pass host port dbname
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# Strip scheme
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CONN="${DB_URL#*://}"
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# Extract user:pass
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USERPASS="${CONN%%@*}"
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DB_USER="${USERPASS%%:*}"
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DB_PASS="${USERPASS#*:}"
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# Extract host:port/dbname
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HOSTDB="${CONN#*@}"
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DB_HOST="${HOSTDB%%:*}"
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PORTDB="${HOSTDB#*:}"
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DB_PORT="${PORTDB%%/*}"
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DB_NAME="${PORTDB#*/}"
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# Remove query params
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DB_NAME="${DB_NAME%%\?*}"
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if [ -z "$DB_NAME" ] || [ -z "$DB_HOST" ] || [ -z "$DB_USER" ]; then
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echo "[$(date)] ERROR: Failed to parse DATABASE_URL"
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exit 1
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fi
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# ── Create backup directory ──
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mkdir -p "$BACKUP_DIR"
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# ── Backup filename ──
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TIMESTAMP=$(date +%Y%m%d_%H%M%S)
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BACKUP_FILE="$BACKUP_DIR/nexus_${DB_NAME}_${TIMESTAMP}.sql.gz"
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# ── Run mysqldump ──
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echo "[$(date)] Starting backup: $DB_NAME @ $DB_HOST"
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if [ -n "$DB_PASS" ]; then
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MYSQL_PWD="$DB_PASS" mysqldump \
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-h "$DB_HOST" \
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-P "${DB_PORT:-3306}" \
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-u "$DB_USER" \
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--single-transaction \
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--routines \
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--triggers \
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--set-gtid-purged=OFF \
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"$DB_NAME" | gzip > "$BACKUP_FILE"
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else
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mysqldump \
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-h "$DB_HOST" \
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-P "${DB_PORT:-3306}" \
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-u "$DB_USER" \
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--single-transaction \
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--routines \
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--triggers \
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--set-gtid-purged=OFF \
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"$DB_NAME" | gzip > "$BACKUP_FILE"
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fi
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# ── Verify backup ──
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if [ -f "$BACKUP_FILE" ]; then
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SIZE=$(du -h "$BACKUP_FILE" | cut -f1)
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echo "[$(date)] Backup completed: $BACKUP_FILE ($SIZE)"
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else
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echo "[$(date)] ERROR: Backup file not created!"
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exit 1
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fi
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# ── Cleanup old backups (retain 30 days) ──
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DELETED=$(find "$BACKUP_DIR" -name "nexus_*.sql.gz" -mtime +${RETENTION_DAYS} -delete -print | wc -l)
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if [ "$DELETED" -gt 0 ]; then
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echo "[$(date)] Cleaned up $DELETED old backup(s) (>${RETENTION_DAYS} days)"
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fi
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echo "[$(date)] Backup process complete"
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