Power Monitoring and Metrics

Overview 

The Power Monitoring system provides comprehensive tracking of power consumption, efficiency analysis, and predictive power management for optimal data center operations. It enables real-time and historical visibility into energy usage, supporting both operational monitoring and analytics.

Monitoring Architecture 

Power Sensors 

Hardware: Power Link device

Data Collection 

Process:

The power link device reads voltage, current, power, and cumulative energy from CT channels every second.
Each reading is timestamped and formatted.
Data is sent via HTTP to the server for storage and visualization.

Metrics Processing 

Real-time Processing:

The backend continuously acquires measurements from the database
Computes derived metrics (power, energy, voltage, current)
Streams and analyzes data for dashboards and reporting

Installation and Configuration 

Hardware Setup 

Install Karios PowerLink
Ensure PowerLink is connected and powered

Software Configuration 

Karios PowerLink web configuration interface:
- Set Wi-Fi credentials (SSID and password)
- Specify the node to associate with
- Enter the database host IP address

Calibration 

Use the provided code to read voltage, current, and power for each CT channel
Validate readings against reference measurements
Confirm data consistency in the InfluxDB power_metrics table

Power Monitoring 

Real-time Monitoring 

The system streams live power, voltage, current, and energy data to InfluxDB
Real-time dashboards visualize these metrics for each node

Historical Analysis 

Historical data is stored in InfluxDB
The backend provides endpoints to query and visualize power consumption trends over time

Reporting and Analytics 

Dashboard 

Real-time dashboard visualizes current, voltage, power, and efficiency
Supports live data streams, historical trends, and power profile events
Interactive graphs and filters by time range or node

Reports 

Automated and custom reports summarize power usage, efficiency, and cost savings
Reports can be scheduled or generated on demand
Export options include PDF and CSV

Integration 

RESTful APIs and WebSocket endpoints allow external systems to access real-time and historical power data
Enables integration with third-party monitoring and analytics platforms

API Endpoints 

The following RESTful and WebSocket endpoints are provided for power monitoring, management, and analytics. All endpoints are grouped under /power/node.

Real-time Metrics 

Endpoint	Method	Description
`/power/node/data/ws`	GET	Establishes a WebSocket connection for streaming real-time system metrics (voltage, current, power, etc.)

Power Supply Management 

Endpoint	Method	Description
`/power/node/power-supply`	POST	Create a new power supply entry
`/power/node/power-supply`	GET	List all power supplies, optionally filtered by node IP
`/power/node/power-supply/:id`	GET	Retrieve details for a specific power supply by ID
`/power/node/power-supply/:id`	PUT	Update an existing power supply entry by ID
`/power/node/power-supply/:id`	DELETE	Delete a power supply entry by ID

Power Profile Management 

Endpoint	Method	Description
`/power/node/power-profile`	POST	Set the power profile for a node
`/power/node/power-profile/events`	GET	Retrieve a list of power profile change events

Node Power Ratings 

Endpoint	Method	Description
`/power/node/ratings`	GET	Retrieve power consumption ratings for nodes over a specified time period

Power Metrics History 

Endpoint	Method	Description
`/power/node/metrics/history`	GET	Retrieve historical power metrics for a node, supporting time range queries for analysis and reporting

Backend Processing:

Aggregates and analyzes data from InfluxDB
Computes efficiency, cost, and energy savings
Provides recommendations for power profiles based on workload

Security and Maintenance 

Wi-Fi credentials are configured securely via the Karios PowerLink Portal
OTA updates are supported for firmware maintenance
Data validation and error handling are implemented in both firmware and backend