Docker integration dashboard is empty. Metric labels seem incomplete

Grafana Cloud
1

Hello.

I am using the official integration of Grafana cloud for Docker and followed the instructions to setup alloy with the provided configurations.

The integration is reporting metrics and the logs are working fine.

But the default Docker integration dashboard is not showing correctly.

Screenshot From 2025-06-08 17-14-29
Screenshot From 2025-06-08 17-14-291525×2020 192 KB

The metrics are being ingested, but I think there are some missing labels to identify each container.

This is what I see in the metrics explorer:

container_last_seen{cluster="test",id="/",instance="webserver-01",job="integrations/docker"}

I am using the default configuration suggested by the integration

prometheus.exporter.cadvisor "integrations_cadvisor" {
    docker_only = true
}
discovery.relabel "integrations_cadvisor" {
    targets = prometheus.exporter.cadvisor.integrations_cadvisor.targets

    rule {
        target_label = "job"
        replacement  = "integrations/docker"
    }

    rule {
        target_label = "instance"
        replacement  = constants.hostname
    }
}

prometheus.relabel "integrations_cadvisor" {
        forward_to = [prometheus.remote_write.metrics_service.receiver]

        rule {
                source_labels = ["__name__"]
                regex         = "up|container_cpu_usage_seconds_total|container_fs_inodes_free|container_fs_inodes_total|container_fs_limit_bytes|container_fs_usage_bytes|container_last_seen|container_memory_usage_bytes|container_network_receive_bytes_total|container_network_tcp_usage_total|container_network_transmit_bytes_total|container_spec_memory_reservation_limit_bytes|machine_memory_bytes|machine_scrape_error"
                action        = "keep"
        }
}

prometheus.scrape "integrations_cadvisor" {
    targets    = discovery.relabel.integrations_cadvisor.output
    forward_to = [prometheus.relabel.integrations_cadvisor.receiver]
}

I am using docker in swarm mode? could that be related? Logs are working fine.

Thank you for your help.

1 Like
2

I fixed this. The /proc and /sys volumes were not mounted in the defaut location in the alloy docker container, but instead in /host/proc and /host/sys.

Node exporter alloys to configure those paths. it would be great if they can be configured in cadvisor exporter as well.