Adds complete documentation for 2025-11-07 security audit and hardening:
- SECURITY_AUDIT_2025-11-07.md: Full professional audit report
- 9 security issues identified and fixed (4 critical, 4 medium, 1 low)
- Detailed findings, remediations, and testing
- Security posture improved from B+ to A
- 85%+ reduction in exploitable attack surface
- SECURITY_CHANGELOG.md: Detailed changelog with migration guide
- Complete implementation details for all fixes
- Configuration examples
- Backwards compatibility notes
- New metrics and features
- DEPLOYMENT_CHECKLIST.md: Step-by-step deployment guide
- Pre-deployment backup procedures
- Deployment steps for Docker and LXC
- Verification procedures
- Rollback procedures
- Troubleshooting guide
- Success criteria
- README.md: Updated with security hardening highlights
- Links to audit report
- Key security features added
Audit performed by Claude (Sonnet 4.5) + Codex collaboration.
All implementations by Codex based on Claude specifications.
100% remediation rate (9/9 issues fixed).
17 new tests added, all passing.
Related to security audit 2025-11-07.
Add comprehensive documentation for new alert system reliability features:
**API Documentation (docs/API.md):**
- Dead Letter Queue (DLQ) API endpoints
- GET /api/notifications/dlq - Retrieve failed notifications
- GET /api/notifications/queue/stats - Queue statistics
- POST /api/notifications/dlq/retry - Retry DLQ items
- POST /api/notifications/dlq/delete - Delete DLQ items
- Prometheus metrics endpoint documentation
- 18 metrics covering alerts, notifications, and queue health
- Example Prometheus configuration
- Example PromQL queries for common monitoring scenarios
**Configuration Documentation (docs/CONFIGURATION.md):**
- Alert TTL configuration
- maxAlertAgeDays, maxAcknowledgedAgeDays, autoAcknowledgeAfterHours
- Flapping detection configuration
- flappingEnabled, flappingWindowSeconds, flappingThreshold, flappingCooldownMinutes
- Usage examples and common scenarios
- Best practices for preventing notification storms
All new features are fully documented with examples and default values.
Related to #636
When authentication is not configured (hasAuth() returns false), the
Settings tab is now automatically hidden from the web interface. This
provides a cleaner monitoring-only view for unauthenticated deployments
where users only need to check the health of their environment.
The Settings icon beside the Alerts tab will only appear when
authentication is properly configured via PULSE_AUTH_USER/PASS,
API tokens, proxy auth, or OIDC.
Changes:
- Modified utilityTabs in App.tsx to conditionally include Settings
based on hasAuth() signal
- Updated CONFIGURATION.md to document this UI behavior
Add comprehensive documentation for HTTPS/TLS configuration including:
- File ownership and permission requirements (pulse user)
- Common troubleshooting steps for startup failures
- Complete setup examples for systemd and Docker
- Validation commands for certificate/key verification
Related to discussion #634
Added comprehensive documentation for the per-metric alert delay feature
that was requested in issue #433. This feature allows configuring
different alert delays for different metrics (e.g., longer delays for
CPU spikes, shorter delays for memory pressure).
Key additions:
- Detailed explanation of delay precedence hierarchy
- JSON configuration examples for common use cases
- Table of recommended delays by metric type with reasoning
- UI access instructions for the Alert Delay row
Also added example tests demonstrating the feature's functionality
and common configuration patterns.
The feature itself was already fully implemented in both backend
(metricTimeThresholds support) and frontend (per-metric delay inputs
in ResourceTable). This commit surfaces the feature through
documentation so users know it exists and how to use it.
Related to #433
- Add Access-Control-Expose-Headers to allow frontend to read X-CSRF-Token response header
- Implement proactive CSRF token issuance on GET requests when session exists but CSRF cookie is missing
- Ensures frontend always has valid CSRF token before making POST requests
- Fixes 403 Forbidden errors when toggling system settings
This resolves CSRF validation failures that occurred when CSRF tokens expired or were missing while valid sessions existed.
Extends the Docker monitoring and alerting system to track writable layer
usage as a percentage of the container's root filesystem. This helps
identify containers with bloated copy-on-write layers before they
consume excessive disk space.
- Add disk threshold to DockerThresholdConfig (default: 85% trigger, 80% clear)
- Evaluate disk alerts for running containers when RootFilesystemBytes > 0
- Include disk metadata (writable layer, total filesystem, block I/O stats)
- Update frontend to display and configure disk thresholds
- Add test coverage for disk usage alert hysteresis
- Document disk monitoring in DOCKER_MONITORING.md
Per-container and per-host overrides apply to disk thresholds the same
way they do for CPU and memory.
Introduces granular permission scopes for API tokens (docker:report, docker:manage, host-agent:report, monitoring:read/write, settings:read/write) allowing tokens to be restricted to minimum required access. Legacy tokens default to full access until scopes are explicitly configured.
Adds standalone host agent for monitoring Linux, macOS, and Windows servers outside Proxmox/Docker estates. New Servers workspace in UI displays uptime, OS metadata, and capacity metrics from enrolled agents.
Includes comprehensive token management UI overhaul with scope presets, inline editing, and visual scope indicators.
Add comprehensive operator documentation for the new observability features
introduced in the previous commit.
**New Documentation:**
- docs/monitoring/PROMETHEUS_METRICS.md - Complete reference for all 18 new
Prometheus metrics with alert suggestions
**Updated Documentation:**
- docs/API.md - Document X-Request-ID and X-Diagnostics-Cached-At headers,
explain diagnostics endpoint caching behavior
- docs/TROUBLESHOOTING.md - Add section on correlating API calls with logs
using request IDs
- docs/operations/ADAPTIVE_POLLING_ROLLOUT.md - Update monitoring checklists
with new per-node and scheduler metrics
- docs/CONFIGURATION.md - Clarify LOG_FILE dual-output behavior and rotation
defaults
These updates ensure operators understand:
- How to set up monitoring/alerting for new metrics
- How to configure file logging with rotation
- How to troubleshoot using request correlation
- What metrics are available for dashboards
Related to: 495e6c794 (feat: comprehensive diagnostics improvements)
Document the pulse-sensor-proxy rate limiting bug fix and new
configurability across all relevant documentation:
TEMPERATURE_MONITORING.md:
- Added 'Rate Limiting & Scaling' section with symptom diagnosis
- Included sizing table for 1-3, 4-10, 10-20, and 30+ node deployments
- Provided tuning formula: interval_ms = polling_interval / node_count
TROUBLESHOOTING.md:
- Added 'Temperature data flickers after adding nodes' section
- Step-by-step diagnosis using limiter metrics and scheduler health
- Quick fix with config example
CONFIGURATION.md:
- Added pulse-sensor-proxy/config.yaml reference section
- Documented rate_limit.per_peer_interval_ms and per_peer_burst fields
- Included defaults and example override
pulse-sensor-proxy-runbook.md:
- Updated quick reference with new defaults (1 req/sec, burst 5)
- Added 'Rate Limit Tuning' procedure with 4 deployment profiles
- Included validation steps and monitoring commands
TEMPERATURE_MONITORING_SECURITY.md:
- Updated rate limiting section with new defaults
- Added configurable overrides guidance
- Documented security considerations for production deployments
Related commits:
- 46b8b8d08: Initial rate limit fix (hardcoded defaults)
- ca534e2b6: Made rate limits configurable via YAML
- e244da837: Added guidance for large deployments (30+ nodes)
- Add comprehensive test coverage for alerts package with 285+ new tests
- Implement ThresholdsTable component with metric thresholds display
- Enhance Alerts page UI with improved layout and metric filtering
- Add frontend component tests for Alerts page and ThresholdsTable
- Set up Vitest testing infrastructure for SolidJS components
- Improve config persistence with better validation
- Expand discovery tests with 333+ test cases
- Update API, configuration, and Docker monitoring documentation
