memory.yaml

###########################################################
## This file has the configuration for
## - A namespace called 0-eldada for isolation
## - A pod with an ubuntu container installed with some basic tools like vim, curl.
##   This container runs a script that holds a block of memory for a given time with
##   an optional gap between memory block runs.
##
## Deploy: kubectl apply -f memory.yaml
## Update (force replacing with new config): kubectl apply -f memory.yaml --force
## Terminal access: kubectl exec -it pod-memory -- bash
## Remove: kubectl delete -f memory.yaml
###########################################################
apiVersion: v1
kind: Namespace
metadata:
  name: 0-eldada
---
apiVersion: v1
kind: Pod
metadata:
  name: pod-memory
  namespace: 0-eldada
spec:
  securityContext:
    runAsUser: 1000
    fsGroup: 1000
  containers:
    - name: container-memory
      image: eldada.jfrog.io/docker/ubuntu-with-tools:22.10
      command:
        - 'bash'
        - '-c'
        - >
          echo "#######################################";
          echo "### Downloading memory.sh";
          curl -f -s -o ./memory.sh https://raw.githubusercontent.com/eldada/command-examples/master/scripts/memory.sh;
          echo "### Running memory.sh";
          bash ./memory.sh --mb ${MEMORY_TO_USE_MB} --wait ${TIME_TO_HOLD} --restart ${RESTART} --gap ${GAP} || exit 1;
          echo "Sleeping forever...";
          while true; do date; sleep 10; done
      env:
        ## Actual memory used in the container will be MEMORY_TO_USE_MB + other system processes
        - name: MEMORY_TO_USE_MB
          value: "500"
        - name: TIME_TO_HOLD
          value: "60"
        - name: RESTART
          value: "true"
        - name: GAP
          value: "45"
## WARNING: Need to set a limit twice as much as the required memory (MEMORY_TO_USE_MB) to avoid an OOMKill.
##          This is due to a spike in memory usage during the actual creation of the memory blob.
#      resources:
#        limits:
#          cpu: "2"
#          memory: 2000Mi
#        requests:
#          cpu: 5m
#          memory: 50Mi