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homelab/docker-compose/monitoring-grafana-promethues-cadvisor-node-exporter/config.alloy
2026-07-26 10:38:26 +03:30

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// Discover all running Docker containers
discovery.docker "containers" {
host = "unix:///var/run/docker.sock"
}
// Extract a clean "container" label from the container name
discovery.relabel "containers" {
targets = discovery.docker.containers.targets
rule {
source_labels = ["__meta_docker_container_name"]
regex = "/(.*)"
target_label = "container"
}
rule {
source_labels = ["__meta_docker_container_name"]
regex = "/(.*)"
target_label = "container_name"
}
rule {
target_label = "instance"
replacement = constants.hostname
}
}
// Tail logs from every discovered container
loki.source.docker "containers" {
host = "unix:///var/run/docker.sock"
targets = discovery.relabel.containers.output
forward_to = [loki.write.default.receiver]
}
// Ship to the local Loki instance
loki.write "default" {
endpoint {
url = "http://loki:3100/loki/api/v1/push"
}
}