About Ramono

ramono is a small program that greedily consumes resources (RAM, Open Files..) in a controlled way.

It is useful to validate that your infrastructure can cope with problematic containers that would escape their resource allocations.

For now ramono is capable of consuming:

• RAM
• File handles
• CPU seconds

Other types of resources will be implemented in future versions, with a focus on the resources that can be controlled with ulimit.

Usage

$ docker run jeteve/ramono

Usage: ramono [OPTIONS]

Options:
-m, --mem-increment <MEMORY_INCREMENT>
[default: 1000]
-l, --mem-limit <MEMORY_LIMIT>
[default: 1000000000]
--file-increment <FILE_INCREMENT>
[default: 0]
--file-limit <FILE_LIMIT>
[default: 1000000000]
--cpus-increment <CPUS_INCREMENT>
[default: 0]
--cpus-limit <CPUS_LIMIT>
[default: 1000000000]
-v, --verbose-level <VERBOSE_LEVEL>
[default: info] [possible values: trace, debug, info, warn, error]
-h, --help
Print help
-V, --version
Print version

About CPU seconds consumption

The the option –cpus-increment to consume roughly N seconds of CPU time every seconds. Every second, ramono will use N threads staying busy for one second to simulate the consumption of N cpu seconds. Use with caution.

Installing

For now, this is only available as a docker image:

https://hub.docker.com/r/jeteve/ramono

Development

Notes on compiling

Compiling for alpine and other MUSL based distribs (see https://musl.libc.org/)

rustup target add x86_64-unknown-linux-musl
cargo build --release --target x86_64-unknown-linux-musl

Releasing

For a minor version bump:

cargo install cargo-release
cargo release -v --no-publish minor