Traefik exposes metrics on EntryPoints, Routers, Services, and more. This guide shows you how to collect these metrics with Prometheus and aggregate logs with Loki via Grafana Alloy for a complete monitoring solution.
Prerequisites
- Grafana, Prometheus, Loki, and Alloy already running — see Setting Up Your Observability Stack
- Traefik set up as per the Traefik Essentials Setup guide
Metrics
Enable Metrics in Traefik
Add the following command flags to your Traefik docker-compose.yml:
command:
# ... existing commands ...
- "--metrics.prometheus=true"
- "--metrics.prometheus.addEntryPointsLabels=true"
- "--metrics.prometheus.addRoutersLabels=true"
- "--metrics.prometheus.addServicesLabels=true"Re-create the Traefik container to apply the changes:
docker compose -f traefik/docker-compose.yml up -d --force-recreateVerify metrics are available at http://<traefik-ip>:8080/metrics.
Configure Prometheus
Add a scrape job to your prometheus.yml:
scrape_configs:
- job_name: 'traefik'
scrape_interval: 5s
static_configs:
- targets: ['<traefik-ip>:8080']Replace <traefik-ip> with your Traefik server’s IP address, then restart Prometheus:
docker restart prometheusVerify Metrics
Query for Traefik metrics in Grafana’s Explore view:
traefik_router_requests_totalLog Files
Enable Logging in Traefik
Add the following command flags to your Traefik docker-compose.yml:
command:
# ... existing commands ...
- "--accesslog=true"
- "--accesslog.filepath=/log/access.log"
- "--accesslog.format=json"
- "--accesslog.fields.defaultmode=keep"
- "--accesslog.fields.names.StartUTC=drop"
- "--log.filepath=/log/traefik.log"
- "--log.format=json"Note: Setting a
filepathredirects logs to a file — they will no longer appear indocker logs.
Also add a volume mapping for the log directory:
volumes:
# ... existing volumes ...
- /var/log/traefik:/logRe-create the Traefik container:
docker compose -f traefik/docker-compose.yml up -d --force-recreateConfigure Grafana Alloy
Create a new Alloy config file for Traefik log collection:
nano alloy/config/traefik.alloy// Traefik logs collection
local.file_match "traefik" {
path_targets = [{
__path__ = "/var/log/traefik/*.log",
}]
}
loki.source.file "traefik" {
targets = local.file_match.traefik.targets
forward_to = [loki.process.traefik.receiver]
}
loki.process "traefik" {
stage.static_labels {
values = {
job = "traefik",
}
}
forward_to = [loki.write.default.receiver]
}Ensure your Alloy docker-compose.yml has /var/log mounted:
volumes:
- ./config/:/etc/alloy/config/:ro
- /var/log:/var/log:ro
- alloy-data:/var/lib/alloy/dataRestart Alloy to pick up the new configuration:
docker restart alloyVerify Logs
Open the Alloy Web UI and confirm the loki.source.file component is healthy, then query in Grafana:
{job="traefik"}Grafana Dashboard
You can use the pre-built Traefik Dashboard from GitHub, or explore available metrics from the official Traefik metrics overview .