Mikkel Georgsen
09f89617e7
- Add backup-postgres.sh with pg_dump custom format (-Fc) - Verify backup integrity via pg_restore --list - Compress backups with gzip for storage efficiency - Delete backups older than 30 days (configurable via RETENTION_DAYS) - Weekly restore test on Mondays to validate backup usability - Add cron configuration for daily 2 AM backups - Add .gitignore for pycache, env files, and backup files
83 lines
2.4 KiB
Bash
Executable file
83 lines
2.4 KiB
Bash
Executable file
#!/bin/bash
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# PostgreSQL backup script for Debate platform
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# Runs daily, keeps 30 days of backups
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# Verifies backup integrity after creation
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set -euo pipefail
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# Configuration
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BACKUP_DIR="${BACKUP_DIR:-/var/backups/debate/postgres}"
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RETENTION_DAYS="${RETENTION_DAYS:-30}"
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CONTAINER_NAME="${CONTAINER_NAME:-debate-postgres}"
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DB_NAME="${DB_NAME:-debate}"
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DB_USER="${DB_USER:-debate}"
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TIMESTAMP=$(date +%Y%m%d_%H%M%S)
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BACKUP_FILE="${BACKUP_DIR}/${DB_NAME}_${TIMESTAMP}.dump"
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# Logging
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log() {
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echo "[$(date '+%Y-%m-%d %H:%M:%S')] $1"
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}
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# Create backup directory
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mkdir -p "$BACKUP_DIR"
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log "Starting backup of database: $DB_NAME"
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# Create backup using pg_dump custom format (-Fc)
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# Custom format is compressed and allows selective restore
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docker exec "$CONTAINER_NAME" pg_dump \
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-U "$DB_USER" \
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-Fc \
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-b \
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-v \
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"$DB_NAME" > "$BACKUP_FILE" 2>/dev/null
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log "Backup created: $BACKUP_FILE"
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# Verify backup integrity using pg_restore --list
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# This reads the archive table of contents without restoring
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# We pipe the backup into the container since pg_restore is only available there
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log "Verifying backup integrity..."
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cat "$BACKUP_FILE" | docker exec -i "$CONTAINER_NAME" pg_restore --list > /dev/null 2>&1 || {
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log "ERROR: Backup verification failed!"
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rm -f "$BACKUP_FILE"
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exit 1
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}
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# Get backup size
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BACKUP_SIZE=$(du -h "$BACKUP_FILE" | cut -f1)
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log "Backup size: $BACKUP_SIZE"
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# Compress backup (pg_dump -Fc includes compression, but gzip adds more)
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gzip -f "$BACKUP_FILE"
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log "Compressed: ${BACKUP_FILE}.gz"
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# Clean up old backups
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log "Removing backups older than $RETENTION_DAYS days..."
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find "$BACKUP_DIR" -name "${DB_NAME}_*.dump.gz" -mtime +$RETENTION_DAYS -delete
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REMAINING=$(find "$BACKUP_DIR" -name "${DB_NAME}_*.dump.gz" | wc -l)
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log "Remaining backups: $REMAINING"
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# Weekly restore test (every Monday)
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if [ "$(date +%u)" -eq 1 ]; then
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log "Running weekly restore test..."
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TEST_DB="${DB_NAME}_backup_test"
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# Create test database
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docker exec "$CONTAINER_NAME" createdb -U "$DB_USER" "$TEST_DB" 2>/dev/null || true
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# Restore to test database
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gunzip -c "${BACKUP_FILE}.gz" | docker exec -i "$CONTAINER_NAME" pg_restore \
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-U "$DB_USER" \
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-d "$TEST_DB" \
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--clean \
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--if-exists 2>&1 || true
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# Drop test database
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docker exec "$CONTAINER_NAME" dropdb -U "$DB_USER" "$TEST_DB" 2>/dev/null || true
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log "Weekly restore test completed"
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fi
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log "Backup completed successfully"
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