Memory Limit and OOM Killer

Scenario

A container named mem_test running from image myapp:mem contains a memory stress script at /app/stress_memory.sh. Currently, the container runs with unbounded memory and can consume as much RAM as available on the host, preventing the OOM (Out of Memory) killer from terminating it even when it allocates excessive memory.

Task

Apply 100MB memory limits to the container so that running the provided stress script causes the container to be OOM-killed. Stop the container, restart it with memory limits applied using the appropriate flags, run the stress script, and verify the container gets OOM-killed when the memory limit is exceeded by checking the OOM kill status.

_Note: The container mem_test and image myapp:mem with the stress script are already available.

Example

# Before (no memory limits)
$ docker inspect mem_test --format 'Memory: {{.HostConfig.Memory}}'
Memory: 0

$ docker inspect mem_test --format 'OOMKilled: {{.State.OOMKilled}}'
OOMKilled: false

# After (memory limits applied and stress script triggers OOM)
$ docker inspect mem_test --format 'Memory: {{.HostConfig.Memory}}'
Memory: 104857600

$ docker inspect mem_test --format 'OOMKilled: {{.State.OOMKilled}}'
OOMKilled: true

$ docker inspect mem_test --format 'ExitCode: {{.State.ExitCode}}'
ExitCode: 137

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