Cloudflare Prometheus Exporter

Export Cloudflare metrics to Prometheus. Built on Cloudflare Workers with Durable Objects for stateful metric accumulation.

Features

58 Prometheus metrics - requests, bandwidth, threats, workers, load balancers, SSL certs, and more
Cloudflare Workers - serverless edge deployment
Durable Objects - stateful counter accumulation for proper Prometheus semantics
Background refresh - alarms fetch data every 60s; scrapes return cached data instantly
Rate limiting - 40 req/10s with exponential backoff
Multi-account - automatically discovers and exports all accessible accounts/zones
Runtime config API - change settings without redeployment via REST endpoints
Configurable - zone filtering, metric denylist, label exclusion, custom metrics path, and more

Quick Start

One-Click Deploy

Click the deploy button above. Configure CLOUDFLARE_API_TOKEN as a secret after deployment.

Manual Deployment

git clone https://github.com/cloudflare/cloudflare-prometheus-exporter.git
cd cloudflare-prometheus-exporter
bun install
wrangler secret put CLOUDFLARE_API_TOKEN
bun run deploy

Configuration

Configuration is resolved in order: KV overrides → env vars → defaults. Use the Runtime Config API for dynamic changes without redeployment.

Environment Variables

Set in wrangler.jsonc or via wrangler secret put:

Variable	Default	Description
`CLOUDFLARE_API_TOKEN`	-	Cloudflare API token (secret)
`QUERY_LIMIT`	10000	Max results per GraphQL query
`SCRAPE_DELAY_SECONDS`	300	Delay before fetching metrics (data propagation)
`TIME_WINDOW_SECONDS`	60	Query time window
`METRIC_REFRESH_INTERVAL_SECONDS`	60	Background refresh interval
`LOG_LEVEL`	info	Log level (debug/info/warn/error)
`LOG_FORMAT`	json	Log format (pretty/json)
`ACCOUNT_LIST_CACHE_TTL_SECONDS`	600	Account list cache TTL
`ZONE_LIST_CACHE_TTL_SECONDS`	1800	Zone list cache TTL
`SSL_CERTS_CACHE_TTL_SECONDS`	1800	SSL cert cache TTL
`HEALTH_CHECK_CACHE_TTL_SECONDS`	10	Health check cache TTL
`EXCLUDE_HOST`	false	Exclude host labels from metrics
`CF_HTTP_STATUS_GROUP`	false	Group HTTP status codes (2xx, 4xx, etc.)
`DISABLE_UI`	false	Disable landing page (returns 404)
`DISABLE_CONFIG_API`	false	Disable config API endpoints (returns 404)
`METRICS_DENYLIST`	-	Comma-separated list of metrics to exclude
`CF_ACCOUNTS`	-	Comma-separated account IDs to include (default: all)
`CF_ZONES`	-	Comma-separated zone IDs to include (default: all)
`CF_FREE_TIER_ACCOUNTS`	-	Comma-separated account IDs using free tier (skips paid-tier metrics)
`METRICS_PATH`	/metrics	Custom path for metrics endpoint

Creating an API Token

Quick setup: Create token with pre-filled permissions

Manual setup:

Permission	Access	Required
Zone > Analytics	Read	Yes
Account > Account Analytics	Read	Yes
Account > Workers Scripts	Read	Yes
Zone > SSL and Certificates	Read	Optional
Zone > Firewall Services	Read	Optional
Zone > Load Balancers	Read	Optional
Account > Logpush	Read	Optional
Account > Magic Transit	Read	Optional

Endpoints

Path	Method	Description
`/`	GET	Landing page (disable: `DISABLE_UI`)
`/metrics`	GET	Prometheus metrics
`/health`	GET	Health check (`{"status":"healthy"}`)
`/config`	GET	Get all runtime config (disable: `DISABLE_CONFIG_API`)
`/config`	DELETE	Reset all config to env defaults (disable: `DISABLE_CONFIG_API`)
`/config/:key`	GET	Get single config value (disable: `DISABLE_CONFIG_API`)
`/config/:key`	PUT	Set config override (persisted in KV) (disable: `DISABLE_CONFIG_API`)
`/config/:key`	DELETE	Reset config key to env default (disable: `DISABLE_CONFIG_API`)

Prometheus Configuration

scrape_configs:
  - job_name: 'cloudflare'
    scrape_interval: 60s
    scrape_timeout: 30s
    static_configs:
      - targets: ['your-worker.your-subdomain.workers.dev']

Runtime Config API

Override configuration at runtime without redeployment. Overrides persist in KV and take precedence over wrangler.jsonc env vars.

Config Keys

Key	Type	Description
`queryLimit`	number	Max results per GraphQL query
`scrapeDelaySeconds`	number	Delay before fetching metrics
`timeWindowSeconds`	number	Query time window
`metricRefreshIntervalSeconds`	number	Background refresh interval
`accountListCacheTtlSeconds`	number	Account list cache TTL
`zoneListCacheTtlSeconds`	number	Zone list cache TTL
`sslCertsCacheTtlSeconds`	number	SSL cert cache TTL
`healthCheckCacheTtlSeconds`	number	Health check cache TTL
`logFormat`	`"json"` \| `"pretty"`	Log format
`logLevel`	`"debug"` \| `"info"` \| `"warn"` \| `"error"`	Log level
`cfAccounts`	string \| null	Comma-separated account IDs (null = all)
`cfZones`	string \| null	Comma-separated zone IDs (null = all)
`cfFreeTierAccounts`	string	Comma-separated free tier account IDs
`metricsDenylist`	string	Comma-separated metrics to exclude
`excludeHost`	boolean	Exclude host labels
`httpStatusGroup`	boolean	Group HTTP status codes

Examples

# Get all config
curl https://your-worker.workers.dev/config

# Get single value
curl https://your-worker.workers.dev/config/logLevel

# Set override
curl -X PUT https://your-worker.workers.dev/config/logLevel \
  -H "Content-Type: application/json" \
  -d '{"value": "debug"}'

# Filter to specific zones
curl -X PUT https://your-worker.workers.dev/config/cfZones \
  -H "Content-Type: application/json" \
  -d '{"value": "zone-id-1,zone-id-2"}'

# Reset to env default
curl -X DELETE https://your-worker.workers.dev/config/logLevel

# Reset all overrides
curl -X DELETE https://your-worker.workers.dev/config

Available Metrics

Zone Request Metrics

Metric	Type	Labels
`cloudflare_zone_requests_total`	counter	zone
`cloudflare_zone_requests_cached`	gauge	zone
`cloudflare_zone_requests_ssl_encrypted`	counter	zone
`cloudflare_zone_requests_content_type`	counter	zone, content_type
`cloudflare_zone_requests_country`	counter	zone, country, region
`cloudflare_zone_requests_status`	counter	zone, status
`cloudflare_zone_requests_browser_map_page_views_count`	counter	zone, family
`cloudflare_zone_requests_ip_class`	counter	zone, ip_class
`cloudflare_zone_requests_ssl_protocol`	counter	zone, ssl_protocol
`cloudflare_zone_requests_http_version`	counter	zone, http_version
`cloudflare_zone_requests_origin_status_country_host`	counter	zone, origin_status, country, host
`cloudflare_zone_requests_status_country_host`	counter	zone, edge_status, country, host
`cloudflare_zone_request_method_count`	counter	zone, method

Zone Bandwidth Metrics

Metric	Type	Labels
`cloudflare_zone_bandwidth_total`	counter	zone
`cloudflare_zone_bandwidth_cached`	counter	zone
`cloudflare_zone_bandwidth_ssl_encrypted`	counter	zone
`cloudflare_zone_bandwidth_content_type`	counter	zone, content_type
`cloudflare_zone_bandwidth_country`	counter	zone, country

Zone Threat Metrics

Metric	Type	Labels
`cloudflare_zone_threats_total`	counter	zone
`cloudflare_zone_threats_country`	counter	zone, country
`cloudflare_zone_threats_type`	counter	zone, type

Zone Page/Unique Metrics

Metric	Type	Labels
`cloudflare_zone_pageviews_total`	counter	zone
`cloudflare_zone_uniques_total`	counter	zone

Colocation Metrics

Metric	Type	Labels
`cloudflare_zone_colocation_visits`	counter	zone, colo, host
`cloudflare_zone_colocation_edge_response_bytes`	counter	zone, colo, host
`cloudflare_zone_colocation_requests_total`	counter	zone, colo, host
`cloudflare_zone_colocation_visits_error`	counter	zone, colo, host, status
`cloudflare_zone_colocation_edge_response_bytes_error`	counter	zone, colo, host, status
`cloudflare_zone_colocation_requests_total_error`	counter	zone, colo, host, status

Firewall Metrics

Metric	Type	Labels
`cloudflare_zone_firewall_events_count`	counter	zone, action, source, rule, host, country
`cloudflare_zone_firewall_bots_detected`	counter	zone, bot_score, detection_ids

Health Check Metrics

Metric	Type	Labels
`cloudflare_zone_health_check_events_origin_count`	counter	zone, health_status, origin_ip, region, fqdn, failure_reason
`cloudflare_zone_health_check_events_avg`	gauge	zone
`cloudflare_zone_health_check_rtt_ms`	gauge	zone, origin_ip, fqdn
`cloudflare_zone_health_check_ttfb_ms`	gauge	zone, origin_ip, fqdn
`cloudflare_zone_health_check_tcp_conn_ms`	gauge	zone, origin_ip, fqdn
`cloudflare_zone_health_check_tls_handshake_ms`	gauge	zone, origin_ip, fqdn

Worker Metrics

Metric	Type	Labels
`cloudflare_worker_requests_count`	counter	script_name
`cloudflare_worker_errors_count`	counter	script_name
`cloudflare_worker_cpu_time`	gauge	script_name, quantile
`cloudflare_worker_duration`	gauge	script_name, quantile

Load Balancer Metrics

Metric	Type	Labels
`cloudflare_zone_pool_health_status`	gauge	zone, lb_name, pool_name
`cloudflare_zone_pool_requests_total`	counter	zone, lb_name, pool_name, origin_name
`cloudflare_zone_lb_pool_rtt_ms`	gauge	zone, lb_name, pool_name
`cloudflare_zone_lb_steering_policy_info`	gauge	zone, lb_name, policy
`cloudflare_zone_lb_origins_selected_count`	gauge	zone, lb_name, pool_name
`cloudflare_zone_lb_origin_weight`	gauge	zone, lb_name, pool_name, origin_name

Logpush Metrics

Metric	Type	Labels
`cloudflare_logpush_failed_jobs_account_count`	counter	account, job_id, destination_type
`cloudflare_logpush_failed_jobs_zone_count`	counter	zone, job_id, destination_type

Error Rate Metrics

Metric	Type	Labels
`cloudflare_zone_customer_error_4xx_rate`	counter	zone, status, country, host
`cloudflare_zone_customer_error_5xx_rate`	counter	zone, status, country, host
`cloudflare_zone_edge_error_rate`	gauge	zone, status
`cloudflare_zone_origin_error_rate`	gauge	zone, status
`cloudflare_zone_origin_response_duration_ms`	gauge	zone, status, country, host

Cache Metrics

Metric	Type	Labels
`cloudflare_zone_cache_hit_ratio`	gauge	zone
`cloudflare_zone_cache_miss_origin_duration_ms`	gauge	zone, country, host

Bot Metrics

Metric	Type	Labels
`cloudflare_zone_bot_request_by_country`	counter	zone, country

Magic Transit Metrics

Metric	Type	Labels
`cloudflare_magic_transit_active_tunnels`	gauge	account
`cloudflare_magic_transit_healthy_tunnels`	gauge	account
`cloudflare_magic_transit_tunnel_failures`	gauge	account
`cloudflare_magic_transit_edge_colo_count`	gauge	account

SSL Certificate Metrics

Metric	Type	Labels
`cloudflare_zone_certificate_validation_status`	gauge	zone, type, issuer, status

Exporter Info Metrics

Metric	Type	Labels
`cloudflare_exporter_up`	gauge	-
`cloudflare_exporter_errors_total`	counter	account_id, error_code
`cloudflare_accounts_total`	gauge	-
`cloudflare_zones_total`	gauge	-
`cloudflare_zones_filtered`	gauge	-
`cloudflare_zones_processed`	gauge	-

Architecture

┌────────────────────────────────────────────────────────────────────────────────┐
│                              WORKER ISOLATE                                    │
│  ┌────────────────┐                                                            │
│  │  Worker.fetch  │◄─── HTTP /metrics, /health, /config                        │
│  │ (HTTP handler) │                                                            │
│  └───────┬────────┘                                                            │
│          │                                                                     │
│          │ RPC (stub.export())                                                 │
│          ▼                                                                     │
│  ┌────────────────────────────────────────────────────────────────────────┐    │
│  │ CONFIG_KV: Runtime config overrides (merged with env defaults)         │    │
│  └────────────────────────────────────────────────────────────────────────┘    │
└──────────┼─────────────────────────────────────────────────────────────────────┘
           │
           │
           ▼
┌────────────────────────────────────────────────────────────────────────────────┐
│                         DURABLE OBJECT ISOLATES                                │
│                                                                                │
│  Each DO runs in its own V8 isolate with:                                      │
│  - Own CloudflareMetricsClient instance (per-isolate singleton)                │
│  - Own persistent storage                                                      │
│  - Own alarm scheduler                                                         │
│                                                                                │
│  ┌─────────────────────────────────────────────────────────────────────────┐   │
│  │              MetricCoordinator (1 global instance)                      │   │
│  │  ID: "metric-coordinator"                                               │   │
│  │  State: accounts[], lastAccountFetch                                    │   │
│  │  Cache TTL: 600s (account list)                                         │   │
│  └─────────────────────────────────────────────────────────────────────────┘   │
│                               │ RPC                                            │
│                  ┌────────────┼────────────┐                                   │
│                  ▼            ▼            ▼                                   │
│  ┌─────────────────┐ ┌─────────────────┐ ┌─────────────────┐                   │
│  │ AccountMetric   │ │ AccountMetric   │ │ AccountMetric   │                   │
│  │ Coordinator     │ │ Coordinator     │ │ Coordinator     │                   │
│  │ account:acct1   │ │ account:acct2   │ │ account:acct3   │                   │
│  │ Alarm: 60s      │ │ Alarm: 60s      │ │ Alarm: 60s      │                   │
│  │ Zone TTL: 1800s │ │ Zone TTL: 1800s │ │ Zone TTL: 1800s │                   │
│  └───────┬─────────┘ └───────┬─────────┘ └───────┬─────────┘                   │
│          │ RPC               │                   │                             │
│   ┌──────┴─────┐      ┌──────┴─────┐      ┌──────┴─────┐                       │
│   ▼            ▼      ▼            ▼      ▼            ▼                       │
│ ┌─────┐    ┌─────┐  ┌─────┐    ┌─────┐  ┌─────┐    ┌─────┐                     │
│ │Exprt│    │Exprt│  │Exprt│    │Exprt│  │Exprt│    │Exprt│                     │
│ │(13) │ .. │(N)  │  │(13) │ .. │(N)  │  │(13) │ .. │(N)  │                     │
│ │acct │    │zone │  │acct │    │zone │  │acct │    │zone │                     │
│ └─────┘    └─────┘  └─────┘    └─────┘  └─────┘    └─────┘                     │
│                                                                                │
│  MetricExporter DOs (per account):                                             │
│  - Account-scoped (13): worker-totals, logpush-account, magic-transit,         │
│    http-metrics, adaptive-metrics, edge-country-metrics, colo-metrics,         │
│    colo-error-metrics, request-method-metrics, health-check-metrics,           │
│    load-balancer-metrics, logpush-zone, origin-status-metrics                  │
│  - Zone-scoped (N per account, 1 per zone): ssl-certificates                   │
│                                                                                │
│  ┌─────────────────────────────────────────────────────────────────────────┐   │
│  │              CloudflareMetricsClient (per-isolate)                      │   │
│  │  - urql Client (GraphQL)                                                │   │
│  │  - Cloudflare SDK (REST)                                                │   │
│  │  - DataLoader: firewallRulesLoader (batches Promise.all calls)          │   │
│  │  - Global Rate limiter: 40 req/10s with exponential backoff             │   │
│  └─────────────────────────────────────────────────────────────────────────┘   │
└────────────────────────────────────────────────────────────────────────────────┘

Request Path: Prometheus Scrape (GET /metrics)

┌──────────┐  GET /metrics   ┌────────┐
│Prometheus│────────────────▶│ Worker │
│  Server  │                 │ .fetch │
└──────────┘                 └───┬────┘
                                │
          ┌──────────────────────┴──────────────────────┐
          │            MetricCoordinator                │
          │                                             │
          │  1. Check account cache (TTL: 600s)         │
          │  2. If stale → getAccounts()                │
          │  3. Fan out to AccountMetricCoordinators    │
          └─────────────────────┬───────────────────────┘
                               │
       ┌────────────────────────┼────────────────────────┐
       │                        │                        │
       ▼                        ▼                        ▼
┌────────────────┐    ┌────────────────┐    ┌────────────────┐
│ AccountMetric  │    │ AccountMetric  │    │ AccountMetric  │
│ Coordinator    │    │ Coordinator    │    │ Coordinator    │
│ (Account A)    │    │ (Account B)    │    │ (Account C)    │
│                │    │                │    │                │
│ 1. Check if    │    │                │    │                │
│    refresh()   │    │  (parallel)    │    │  (parallel)    │
│    needed      │    │                │    │                │
│ 2. Fan out to  │    │                │    │                │
│    exporters   │    │                │    │                │
└───────┬────────┘    └───────┬────────┘    └───────┬────────┘
        │                     │                     │
  ┌─────┴─────┐         ┌─────┴─────┐         ┌─────┴─────┐
  ▼           ▼         ▼           ▼         ▼           ▼
┌─────┐   ┌─────┐    ┌─────┐   ┌─────┐    ┌─────┐   ┌─────┐
│Exprt│...│Exprt│    │Exprt│...│Exprt│    │Exprt│...│Exprt│
│13+N │   │     │    │13+N │   │     │    │13+N │   │     │
│     │   │     │    │     │   │     │    │     │   │     │
│ ret │   │ ret │    │ ret │   │ ret │    │ ret │   │ ret │
│cache│   │cache│    │cache│   │cache│    │cache│   │cache│
└──┬──┘   └──┬──┘    └──┬──┘   └──┬──┘    └──┬──┘   └──┬──┘
   │         │          │         │          │         │
   └────┬────┘          └────┬────┘          └────┬────┘
        │                    │                    │
        └────────────────────┼────────────────────┘
                             │
                             ▼
                   ┌─────────────────┐
                   │  FAN-IN: Merge  │
                   │  all metrics +  │
                   │  serialize to   │
                   │  Prometheus fmt │
                   └────────┬────────┘
                            │
                            ▼
                   ┌─────────────────┐
                   │  HTTP Response  │
                   │  text/plain     │
                   └─────────────────┘

┌──────────────────────────────────────────────────────────┐
│ NOTE: Request path is FAST - just reads cached metrics   │
│ No network calls to Cloudflare API during scrape         │
│ (unless account list cache is stale)                     │
└──────────────────────────────────────────────────────────┘

Background Refresh Path: Alarm-Driven Metric Fetching

┌──────────────────────────────────────────────┐
│           ALARM TRIGGERS                     │
│ AccountMetricCoordinator: every 60s          │
│ MetricExporter: every 60s + 1-5s fixed jitter│
└──────────────────────────────────────────────┘

AccountMetricCoordinator.alarm()

┌────────────────────────────────────────────────────────────────────────┐
│                 AccountMetricCoordinator.refresh()                     │
│                                                                        │
│  1. Check zone cache (TTL: 1800s / 30 min)                             │
│                                                                        │
│  2. If stale:                                                          │
│     ┌────────────────────────────────────────────────────────────────┐ │
│     │  REST: getZones(accountId)                                     │ │
│     │           └─► DataLoader batches if multiple calls same tick   │ │
│     └────────────────────────────────────────────────────────────────┘ │
│     ┌────────────────────────────────────────────────────────────────┐ │
│     │  REST: getFirewallRules(zoneId) × N zones (parallel)           │ │
│     │           └─► DataLoader batches parallel calls                │ │
│     └────────────────────────────────────────────────────────────────┘ │
│                                                                        │
│  3. Push context to MetricExporter DOs:                                │
│     ┌────────────────────────────────────────────────────────────────┐ │
│     │ Account-scoped (13 exporters):                                 │ │
│     │   exporter.updateZoneContext(accountId, accountName, zones)    │ │
│     │                                                                │ │
│     │ Zone-scoped (N exporters, 1 per zone):                         │ │
│     │   exporter.initializeZone(zone, accountId, accountName)        │ │
│     └────────────────────────────────────────────────────────────────┘ │
│                                                                        │
│  4. Schedule next alarm (60s)                                          │
└────────────────────────────────────────────────────────────────────────┘

MetricExporter.alarm()

┌────────────────────────────────────────────────────────────────────────┐
│           MetricExporter.refresh() for account-scoped queries          │
│                                                                        │
│  Query Types (13 total):                                               │
│  ├── ACCOUNT-LEVEL (single account per query, 3):                      │
│  │   ├── worker-totals                                                 │
│  │   ├── logpush-account                                               │
│  │   └── magic-transit                                                 │
│  │                                                                     │
│  └── ZONE-LEVEL (all zones batched in one query, 10):                  │
│      ├── http-metrics                                                  │
│      ├── adaptive-metrics                                              │
│      ├── edge-country-metrics                                          │
│      ├── colo-metrics                                                  │
│      ├── colo-error-metrics                                            │
│      ├── request-method-metrics                                        │
│      ├── health-check-metrics                                          │
│      ├── load-balancer-metrics                                         │
│      ├── logpush-zone                                                  │
│      └── origin-status-metrics                                         │
│                                                                        │
│  After fetch: Process counters → Cache metrics → Schedule next alarm   │
│  Jitter: 1-5s fixed (tighter clustering for time range alignment)      │
└────────────────────────────────────────────────────────────────────────┘

Development

bun install          # Install dependencies
bun run dev          # Run locally (port 8787)
bun run check        # Lint + format check
bun run deploy       # Deploy to Cloudflare

Tech Stack

Hono - Web framework
urql - GraphQL client
gql.tada - Type-safe GraphQL
Zod - Schema validation
DataLoader - Request batching
Cloudflare SDK - REST API client
Cloudflare KV - Runtime config persistence

License

MIT

Name		Name	Last commit message	Last commit date
Latest commit History 2 Commits
src		src
.gitignore		.gitignore
LICENSE		LICENSE
README.md		README.md
biome.json		biome.json
bun.lock		bun.lock
docker-compose.yml		docker-compose.yml
package.json		package.json
prometheus.yml		prometheus.yml
tsconfig.json		tsconfig.json
worker-configuration.d.ts		worker-configuration.d.ts
wrangler.jsonc		wrangler.jsonc

License

cloudflare/cloudflare-prometheus-exporter

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Cloudflare Prometheus Exporter

Features

Quick Start

One-Click Deploy

Manual Deployment

Configuration

Environment Variables

Creating an API Token

Endpoints

Prometheus Configuration

Runtime Config API

Config Keys

Examples

Available Metrics

Zone Request Metrics

Zone Bandwidth Metrics

Zone Threat Metrics

Zone Page/Unique Metrics

Colocation Metrics

Firewall Metrics

Health Check Metrics

Worker Metrics

Load Balancer Metrics

Logpush Metrics

Error Rate Metrics

Cache Metrics

Bot Metrics

Magic Transit Metrics

SSL Certificate Metrics

Exporter Info Metrics

Architecture

Request Path: Prometheus Scrape (GET /metrics)

Background Refresh Path: Alarm-Driven Metric Fetching

Development

Tech Stack

License

About

Resources

License

Code of conduct

Contributing

Security policy

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