README.md

Docker Stats Receiver exercise

Run Docker container:

docker run --name sleepy-busybox -d busybox sleep infinity

Read the Docker Stats Receiver documentation
Add the docker_stats receiver to the config.yaml file. Set the collection_interval to 3s.

Run otelcol-contrib for a short amount of time, you should see metrics coming in with the similar log line:

2022-05-21T19:01:37.982+0200	INFO	loggingexporter/logging_exporter.go:56	MetricsExporter	{"#metrics": 53}

Open the newly created metrics.json file with the text editor of your choice. See what metrics have been collected.

Run second container which is based on Ubuntu this time:

docker run --name sleepy-ubuntu -d ubuntu sleep infinity

Again run otelcol-contrib for a short amount of time, collect some metrics.
Open the metrics.json file. Notice if you have metrics about both containers.
Change the config.yaml file by adding the exclude_images key. Exclude the busybox images. Run otelcol-contrib for some time.
Open the metrics.json file. Notice that metrics about the busybox image based container were not collected.

Remove both running containers:

docker rm -f sleepy-ubuntu sleepy-busybox