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O2 software toy model

This directory contains a toy model which pretends to be O2 software in terms of how it uses memory and runs on a K8s cluster. The manifest file declares an init container which creates a shared memory segment and two identical memory-user containers which write to anonymous and/or shared memory with specified rates. One can set memory requests and limits to the containers and observe the behaviour.

The manifest also includes a mem-guard container, which monitors anonymous memory usage of memory-users and kills them when they go above a set threshold.

See the manifest and environment variables inside for configuring memory consumption rates and thresholds.

See OCTRL-1079 for more context and info which was understood using this model.

Running

  1. Add allocate.py and mem_guard.py scripts to a configmap. This way we can reuse the official python image as-is.
kubectl create configmap allocate-script \
  --from-file=allocate.py=./allocate.py \
  --from-file=mem_guard.py=./mem_guard.py \
  -o yaml --dry-run=client | kubectl apply -f -
  1. Apply the manifest
kubectl apply -f mem-allocate-test.yaml