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PMDaemon v0.1.1 - Enhanced Delete Operations, Health Checks & Monitoring

Shawn McAllister
Shawn McAllister
Lead Developer

We're excited to announce PMDaemon v0.1.1, a significant update that brings powerful new features for production environments, enhanced safety mechanisms, and comprehensive health monitoring capabilities.

🚀 Major New Features​

Enhanced Delete Operations​

This release introduces robust bulk deletion capabilities with safety mechanisms:

  • Bulk deletion: Added delete all command to stop and delete all processes at once
  • Status-based deletion: Added delete <status> --status to delete processes by their current state
    • Valid statuses: starting, online, stopping, stopped, errored, restarting
  • Force flag: Added --force / -f flag to skip confirmation prompts for automation
  • Safety confirmations: Interactive prompts for bulk operations to prevent accidental deletions
  • Process shutdown: All delete operations now properly stop running processes before deletion
  • Enhanced feedback: Clear reporting of how many processes were stopped vs. deleted
# Delete all stopped processes
pmdaemon delete stopped --status --force

# Delete all processes with confirmation
pmdaemon delete all

# Force delete without prompts (for scripts)
pmdaemon delete all --force

Health Checks & Monitoring​

Advanced health monitoring capabilities that go beyond basic process tracking:

  • HTTP Health Checks: Monitor process health via HTTP endpoints (--health-check-url)
  • Script-based Health Checks: Custom health check scripts for complex validation (--health-check-script)
  • Configurable Health Parameters: Timeout (--health-check-timeout), interval, and retry settings (--health-check-retries)
  • Health-based Auto-restart: Automatic restart when health checks fail
  • Monitoring Integration: Health status visible in process listings (pmdaemon monit) and web API
# Start with HTTP health check
pmdaemon start app.js --health-check-url http://localhost:3000/health

# Start with custom health script
pmdaemon start app.js --health-check-script ./health-check.sh

Blocking Start Command​

Perfect for deployment scripts that need to wait for services to be ready:

  • Wait for Ready: Block start command until processes are healthy (--wait-ready)
  • Configurable Wait Timeout: Set maximum wait time for process readiness (--wait-timeout)
  • Progress Indicators: Real-time status updates during health check waiting
  • Script-friendly: Ideal for deployment scripts that need to wait for services
# Wait for process to be healthy before continuing
pmdaemon start app.js --wait-ready --wait-timeout 30s

Configurable Monitoring Intervals​

Optimize monitoring performance for your specific needs:

  • Library: Added monitor_with_interval(Duration) method for configurable update intervals
  • CLI: Added --interval / -i flag to monit command for custom refresh rates
  • Performance optimization: Users can now balance responsiveness vs. resource usage:
    • Fast updates (1s) for debugging and development
    • Balanced updates (2s) for general use (library default)
    • Slower updates (5s+) for reduced system load
# Monitor with 5-second intervals
pmdaemon monit --interval 5

🔧 Enhanced Features​

Professional Monitoring Display​

  • Beautiful table formatting: Integrated comfy-table for professional display
  • Color-coded status indicators:
    • 🟢 Green for Online processes
    • 🔴 Red for Stopped/Errored processes
    • 🟡 Yellow for Starting/Stopping processes
    • 🔵 Blue for Restarting processes
  • PID column: Added Process ID display for better debugging and system integration
  • Enhanced system overview: Improved system metrics display with proper formatting

Enhanced Log Management​

  • Real-time log following: Implemented follow_logs() method with tail -f functionality
  • Configurable log retrieval: Enhanced get_logs() method with proper line limiting
  • Missing file handling: Graceful handling of non-existent log files
  • CLI integration: pmdaemon logs --follow for real-time log monitoring

🧪 Comprehensive Testing​

This release significantly expands our test coverage:

  • Test count: 267 total tests (up from 158 before health checks & blocking start)
  • New coverage: Delete operations (bulk, status-based, safe shutdown), Health Checks (HTTP, script, params), Blocking Start (--wait-ready, --wait-timeout), CLI argument parsing and utility functions, and process lifecycle management.
  • Enhanced test suites: Added comprehensive tests for all new delete, health check, blocking start functionality, and complete CLI binary test coverage.
  • Quality: 100% test success rate with comprehensive error path testing and 80%+ code coverage.

🐛 Bug Fixes​

  • Production-ready code: Eliminated all TODO comments from production codebase
  • Thread safety: Improved async/await patterns and lock management
  • Memory efficiency: Optimized file reading and monitoring operations

📊 Technical Details​

  • Dependencies: Added comfy-table for professional table formatting
  • Performance: Configurable intervals allow optimization for different use cases. Health checks add minimal overhead
  • Compatibility: Backward compatible - no breaking changes to existing API

Download & Install​

# Install from crates.io
cargo install pmdaemon

# Or build from source
git clone https://github.com/entrepeneur4lyf/pmdaemon.git
cd pmdaemon
cargo build --release

What's Next​

We're continuing to enhance PMDaemon with more advanced features. Stay tuned for upcoming releases!

Full Changelog: v0.1.0...v0.1.1