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pg_database_manager.sh.README.md

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pg_database_manager.sh

Purpose

Automates PostgreSQL database management tasks including backup, restoration, maintenance, and monitoring. This script provides comprehensive database administration capabilities for PostgreSQL installations.

Features

  • Automated database backups
  • Point-in-time recovery
  • Database maintenance operations
  • Performance monitoring
  • User management
  • Replication management
  • Vacuum and analyze automation
  • Database statistics collection

Requirements

  • PostgreSQL server installed
  • psql client utilities
  • Sufficient disk space for backups
  • PostgreSQL superuser privileges
  • pg_dump and pg_restore utilities
  • System backup directory access

Usage

./pg_database_manager.sh [operation] [options]

Operations:
  backup     Create database backup
  restore    Restore from backup
  maintain   Run maintenance tasks
  monitor    Show database statistics
  vacuum     Perform vacuum analysis
  users      Manage database users

Common Operations

  1. Backup Management

    # Full database backup
./pg_database_manager.sh backup --full

# Single database backup
./pg_database_manager.sh backup --db dbname

# Incremental backup
./pg_database_manager.sh backup --incremental

  2. Restore Operations

    # Full restore
./pg_database_manager.sh restore --backup-file backup.sql

# Point-in-time recovery
./pg_database_manager.sh restore --timestamp "2024-01-15 14:30:00"

  3. Maintenance Tasks

    # Run all maintenance tasks
./pg_database_manager.sh maintain --all

# Specific maintenance
./pg_database_manager.sh maintain --reindex

Configuration

The script uses a configuration file for database connection and backup settings:

# /etc/pg_database_manager.conf
PG_HOST="localhost"
PG_PORT="5432"
PG_USER="postgres"
BACKUP_DIR="/var/lib/postgresql/backups"
RETENTION_DAYS=30
ENABLE_COMPRESSION=true

Monitoring Features

  • Database size tracking
  • Connection statistics
  • Query performance metrics
  • Lock monitoring
  • Replication lag tracking
  • Table/index statistics
  • Cache hit ratios

Error Handling

  • Validates database connectivity
  • Checks backup space availability
  • Verifies backup integrity
  • Handles interrupted operations
  • Provides detailed error logging
  • Implements retry mechanisms

Log File

The script maintains logs at /var/log/pg_database_manager.log containing:

  • Operation timestamps
  • Backup/restore status
  • Maintenance activities
  • Error messages
  • Performance metrics
  • User management changes

Security Features

  • Encrypted backups support
  • Secure password handling
  • Role-based access control
  • SSL connection support
  • Audit logging
  • Backup verification

Best Practices

  • Regular backup verification
  • Maintain backup retention policy
  • Monitor backup size growth
  • Regular maintenance scheduling
  • Keep logs rotated
  • Test restore procedures
  • Monitor performance metrics
  • Regular security audits