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Container Exporter

Prometheus exporter exposing container metrics.

The container-exporter requests a list of containers running on the host by talking to a container manager. Right now, Docker as container manager is supported. It then gathers various container metrics by using libcontainer and DockerClient and then exposes them for prometheus' consumption.

Run it as container

docker run -p 9104:9104 -v /sys/fs/cgroup:/cgroup \
           -v /var/run/docker.sock:/var/run/docker.sock prom/container-exporter

Support for labels

Specify all Docker label whose values you would like to tag your Prometheus metrics with by using the -labels parameter to the container exporter binary (or docker container). For example if you have a container labeled with LabelA and LabelB and a second container labeled with LabelB and LabelC as shown below. You can launch container exporter with the parameter -labels=LabelA,LabelB,LabelC.

docker run --name ContainerA --label LabelA=ValueA --label LabelB=ValueB [IMAGE] 
docker run --name ContainerB --label LabelB=ValueB --label LabelC=ValueC [IMAGE] 
docker run -p 9104:9104 -v /sys/fs/cgroup:/cgroup \
           -v /var/run/docker.sock:/var/run/docker.sock prom/container-exporter -labels=LabelA,LabelB,LabelC

This will load to the metrics shown below. Note that an empty string is reported for any container that does not define a label that is specified to container exporter.

container_cpu_throttled_periods_total{LabelA="ValueA",LabelB="ValueB",LabelC="",name="ContainerA"...
container_cpu_throttled_periods_total{LabelA="",LabelB="ValueB",LabelC="ValueC",name="ContainerB"...