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Stress Example Container

This container is a simple example of a container that consumes resources. It uses the stress-ng command to consume CPU and memory resources. The use case for this container is to demonstrate how the orchestrator can handle a container that consumes lots of resources.

Environment variables​

  • STRESS: The parameters for the stress-ng command. (default: --vm 1 --vm-bytes 128M --vm-hang 0)
  • WAIT: The duration to wait before starting to consume resources in seconds. (default: 0)
  • INFINITE: If set to true, the container will run until it is stopped. (default: false)
  • SLEEP: The duration to sleep between each iteration in seconds. (default: 1)

Fore more options for the stress-ng command, see the stress-ng documentation.

Examples for STRESS variable​

Examples from the stress-ng documentation:

  • Getting the CPU hot --matrix 0 --matrix-size 64 --tz -t 60
  • Forcing memory pressure --brk 2 --stack 2 --bigheap 2
  • Causing More Virtual Memory: --vm 2 --vm-bytes 2G --mmap 2 --mmap-bytes 2G --page-in
  • Generating a large interrupt load: --timer 32 --timer-freq 1000000
  • Generating major page faults: --fault 0 --perf -t 1m

Running with docker​

docker run -it --rm -e STRESS="--vm 1 --vm-bytes 128M --vm-hang 0" -e WAIT=2 -e INFINITE=true mhus/example-stress:latest

Running with kubernetes​

kubectl run stress --image=mhus/example-stress:latest --env="STRESS=--vm 1 --vm-bytes 128M --vm-hang 0" --env="WAIT=2" --env="INFINITE=true"