--- name: prometheus description: Query Prometheus monitoring data to check server metrics, resource usage, and system health. Use when the user asks about server status, disk space, CPU/memory usage, network stats, or any metrics collected by Prometheus. Supports multiple Prometheus instances with aggregated queries, config file or environment variables, and HTTP Basic Auth. ---

Prometheus Skill

Query Prometheus monitoring data from one or multiple instances. Supports federation across multiple Prometheus servers with a single command.

Quick Start

1. Initial Setup

Run the interactive configuration wizard:

cd ~/.openclaw/workspace/skills/prometheus
node scripts/cli.js init

This will create a prometheus.json config file in your OpenClaw workspace (~/.openclaw/workspace/prometheus.json).

2. Start Querying

# Query default instance
node scripts/cli.js query 'up'

# Query all instances at once
node scripts/cli.js query 'up' --all

# List configured instances
node scripts/cli.js instances

Configuration

Config File Location

By default, the skill looks for config in your OpenClaw workspace:

~/.openclaw/workspace/prometheus.json

Priority order:

1. Path from PROMETHEUS_CONFIG environment variable
2. ~/.openclaw/workspace/prometheus.json
3. ~/.openclaw/workspace/config/prometheus.json
4. ./prometheus.json (current directory)
5. ~/.config/prometheus/config.json

Config Format

Create prometheus.json in your workspace (or use node cli.js init):

{
  "instances": [
    {
      "name": "production",
      "url": "https://prometheus.example.com",
      "user": "admin",
      "password": "secret"
    },
    {
      "name": "staging",
      "url": "http://prometheus-staging:9090"
    }
  ],
  "default": "production"
}

Fields:

• name — unique identifier for the instance
• url — Prometheus server URL
• user / password — optional HTTP Basic Auth credentials
• default — which instance to use when none specified

Environment Variables (Legacy)

For single-instance setups, you can use environment variables:

export PROMETHEUS_URL=https://prometheus.example.com
export PROMETHEUS_USER=admin        # optional
export PROMETHEUS_PASSWORD=secret   # optional

Usage

Global Flags

| Flag | Description | |------|-------------| | -c, --config | Path to config file | | -i, --instance | Target specific instance | | -a, --all | Query all configured instances |

Commands

Setup

# Interactive configuration wizard
node scripts/cli.js init

Query Metrics

cd ~/.openclaw/workspace/skills/prometheus

# Query default instance
node scripts/cli.js query 'up'

# Query specific instance
node scripts/cli.js query 'up' -i staging

# Query ALL instances at once
node scripts/cli.js query 'up' --all

# Custom config file
node scripts/cli.js query 'up' -c /path/to/config.json

Common Queries

Disk space usage:

node scripts/cli.js query '100 - (node_filesystem_avail_bytes / node_filesystem_size_bytes * 100)' --all

CPU usage:

node scripts/cli.js query '100 - (avg by (instance) (irate(node_cpu_seconds_total{mode="idle"}[5m])) * 100)' --all

Memory usage:

node scripts/cli.js query '(node_memory_MemTotal_bytes - node_memory_MemAvailable_bytes) / node_memory_MemTotal_bytes * 100' --all

Load average:

node scripts/cli.js query 'node_load1' --all

List Configured Instances

node scripts/cli.js instances

Output:

{
  "default": "production",
  "instances": [
    { "name": "production", "url": "https://prometheus.example.com", "hasAuth": true },
    { "name": "staging", "url": "http://prometheus-staging:9090", "hasAuth": false }
  ]
}

Other Commands

# List all metrics matching pattern
node scripts/cli.js metrics 'node_memory_*'

# Get label names
node scripts/cli.js labels --all

# Get values for a label
node scripts/cli.js label-values instance --all

# Find time series
node scripts/cli.js series '{__name__=~"node_cpu_.*", instance=~".*:9100"}' --all

# Get active alerts
node scripts/cli.js alerts --all

# Get scrape targets
node scripts/cli.js targets --all

Multi-Instance Output Format

When using --all, results include data from all instances:

{
  "resultType": "vector",
  "results": [
    {
      "instance": "production",
      "status": "success",
      "resultType": "vector",
      "result": [...]
    },
    {
      "instance": "staging",
      "status": "success",
      "resultType": "vector",
      "result": [...]
    }
  ]
}

Errors on individual instances don't fail the entire query — they appear with "status": "error" in the results array.

Common Queries Reference

| Metric | PromQL Query | |--------|--------------| | Disk free % | node_filesystem_avail_bytes / node_filesystem_size_bytes * 100 | | Disk used % | 100 - (node_filesystem_avail_bytes / node_filesystem_size_bytes * 100) | | CPU idle % | avg by (instance) (irate(node_cpu_seconds_total{mode="idle"}[5m])) * 100 | | Memory used % | (node_memory_MemTotal_bytes - node_memory_MemAvailable_bytes) / node_memory_MemTotal_bytes * 100 | | Network RX | rate(node_network_receive_bytes_total[5m]) | | Network TX | rate(node_network_transmit_bytes_total[5m]) | | Uptime | node_time_seconds - node_boot_time_seconds | | Service up | up |

Notes

• Time range defaults to last 1 hour for instant queries
• Use range queries [5m] for rate calculations
• All queries return JSON with data.result containing the results
• Instance labels typically show host:port format
• When using --all, queries run in parallel for faster results
• Config is stored outside the skill directory so it persists across skill updates