mnitchev / metrics-example

Sending container metrics from Kubernetes to Doppler

NOTE: This is example code from this spike

Prerequisites

1. Kube cluster with heapster installed (should be installed by default if the cluster is version <=1.10)
2. A doppler running somewhere that's reachable from inside the cluster

Example code

The example gathers the metrics for all pods running in the opi namespace. Unfortunately the metrics that are returned are just cpu and memory and doppler requires also disk, disk_quota and memory_quota to also be set for it to interpret the Envelope as a ContainerMetric. To emit the envelopes the go-loggregator client is used. The client has a hardcoded value for the "serverName" for which the doppler certificates are valid. In this example the code in vendor has been changed but a more permanent solution would be to add the "metron" alternative name to the certificates.