StackdriverStatsExporter: k8s namespace and container name missing

What version of OpenCensus are you using?

0.19.1

What JVM are you using (java -version)?

openjdk version “1.8.0_181” OpenJDK Runtime Environment (build 1.8.0_181-8u181-b13-0ubuntu0.16.04.1-b13) OpenJDK 64-Bit Server VM (build 25.181-b13, mixed mode)

What did you do?

I’m using StackdriverStatsExporter.createAndRegister() in an application running on GKE (1.10.11-gke.1).

What did you expect to see?

I expect all the labels for k8s_container to be populated, see https://cloud.google.com/monitoring/api/resources#tag_k8s_container

What did you see instead?

The following labels are empty:

• namespace_name
• container_name

This makes it very hard to differentiate metrics between multiple applications running within the same GCP project.

Is there a workaround for this?

It would help a lot if it would be possible to set global tags which are appended to all metrics automatically.

[mwuertinger]

We’re now using the following code to get the MonitoredResource:

    MonitoredResource getMonitoredResource(String containerName) {
        try {
            MonitoredResource.Builder builder = MonitoredResource.newBuilder();
            builder.setType("k8s_container");

            builder.putLabels("container_name", containerName);

            String gcpProjectId = MetadataConfig.getProjectId();
            if (gcpProjectId != null) {
                builder.putLabels("project_id", gcpProjectId);
            }

            String zone = MetadataConfig.getZone();
            if (zone != null) {
                builder.putLabels("location", zone);
            }

            String clusterName = MetadataConfig.getClusterName();
            if (clusterName != null) {
                builder.putLabels("cluster_name", clusterName);
            }

            String namespace = System.getenv("KUBERNETES_NAMESPACE");
            if (namespace != null) {
                builder.putLabels("namespace_name", namespace);
            }

            String hostname = InetAddress.getLocalHost().getHostName();
            builder.putLabels("pod_name", hostname);

            return builder.build();
        } catch (Exception e) {
            log.error("Unable to determine MonitoredResource, falling back to default", e);
            return null;
        }
    }

We set the namespace via downward API and just set the container name to the service name within the application. This works fine for our needs right now.

Thanks for your help. We can close this issue.

[songy23]

Thanks @mwuertinger for confirmation. Closing this for now, feel free to reopen if you have any follow-up questions.