Kubernetes API caching layer according to Stable Diffusion

Make it faster!

There are use cases that put the Kubernetes API under heavy load - using Rancher at scale can be one of them.

Also, there are use cases in which a connection to the Kubernetes API might not always be present, or with good bandwidth - using Rancher for edge use cases can be one of them.

This project aims to create a local cache serving data from the Kubernetes API - with good performance and displaying last-good-results on a flaky connection.

Goal for this Hackweek

Implement Proof-Of-Concept client-go components backed by SQLite.

https://github.com/moio/vai

Resources

Golang and ideally Kubernetes hackers are more than welcome!

Looking for hackers with the skills:

kubernetes k8s api golang go performance testautomation scalability

This project is part of:

Hack Week 22

Activity

  • almost 3 years ago: lizhang liked this project.
  • almost 3 years ago: moio added keyword "k8s" to this project.
  • almost 3 years ago: moio added keyword "api" to this project.
  • almost 3 years ago: moio added keyword "golang" to this project.
  • almost 3 years ago: moio added keyword "go" to this project.
  • almost 3 years ago: moio added keyword "performance" to this project.
  • almost 3 years ago: moio added keyword "testautomation" to this project.
  • almost 3 years ago: moio added keyword "scalability" to this project.
  • almost 3 years ago: moio added keyword "kubernetes" to this project.
  • almost 3 years ago: moio liked this project.
  • almost 3 years ago: paulgonin liked this project.
  • almost 3 years ago: moio started this project.
  • almost 3 years ago: moio originated this project.

  • Comments

    • moio
      almost 3 years ago by moio | Reply

      Day 1 question: is a separate daemon design better than creating an Informer backed by a SQL cache.Store?

    • moio
      almost 3 years ago by moio | Reply

      Day 1 answer: no. Pivoting project to the creation of a SQL-based Indexer

    • moio
      almost 3 years ago by moio | Reply

      Day 2 progress: SQL-backed Store works. https://github.com/moio/vai

    • moio
      almost 3 years ago by moio | Reply

      Day 3 progress: SQL-backed Indexer works

    • moio
      almost 3 years ago by moio | Reply

      Day 4 question: where would it fit best? Steve or Lasso, and where?

    • moio
      almost 3 years ago by moio | Reply

      Day 4 answer: Steve, as an alternative to the current LRU cache of k8s API responses

    • moio
      almost 3 years ago by moio | Reply

      Day 5 progress: SQL-backed ThreadSafeStore works. History-preserving VersionedStore also works

    Similar Projects

    Kubernetes-Based ML Lifecycle Automation by lmiranda

    Description

    This project aims to build a complete end-to-end Machine Learning pipeline running entirely on Kubernetes, using Go, and containerized ML components.

    The pipeline will automate the lifecycle of a machine learning model, including:

    • Data ingestion/collection
    • Model training as a Kubernetes Job
    • Model artifact storage in an S3-compatible registry (e.g. Minio)
    • A Go-based deployment controller that automatically deploys new model versions to Kubernetes using Rancher
    • A lightweight inference service that loads and serves the latest model
    • Monitoring of model performance and service health through Prometheus/Grafana

    The outcome is a working prototype of an MLOps workflow that demonstrates how AI workloads can be trained, versioned, deployed, and monitored using the Kubernetes ecosystem.

    Goals

    By the end of Hack Week, the project should:

    1. Produce a fully functional ML pipeline running on Kubernetes with:

      • Data collection job
      • Training job container
      • Storage and versioning of trained models
      • Automated deployment of new model versions
      • Model inference API service
      • Basic monitoring dashboards
    2. Showcase a Go-based deployment automation component, which scans the model registry and automatically generates & applies Kubernetes manifests for new model versions.

    3. Enable continuous improvement by making the system modular and extensible (e.g., additional models, metrics, autoscaling, or drift detection can be added later).

    4. Prepare a short demo explaining the end-to-end process and how new models flow through the system.

    Resources

    Project Repository

    Updates

    1. Training pipeline and datasets
    2. Inference Service py


    Preparing KubeVirtBMC for project transfer to the KubeVirt organization by zchang

    Description

    KubeVirtBMC is preparing to transfer the project to the KubeVirt organization. One requirement is to enhance the modeling design's security. The current v1alpha1 API (the VirtualMachineBMC CRD) was designed during the proof-of-concept stage. It's immature and inherently insecure due to its cross-namespace object references, exposing security concerns from an RBAC perspective.

    The other long-awaited feature is the ability to mount virtual media so that virtual machines can boot from remote ISO images.

    Goals

    1. Deliver the v1beta1 API and its corresponding controller implementation
    2. Enable the Redfish virtual media mount function for KubeVirt virtual machines

    Resources


    OpenPlatform Self-Service Portal by tmuntan1

    Description

    In SUSE IT, we developed an internal developer platform for our engineers using SUSE technologies such as RKE2, SUSE Virtualization, and Rancher. While it works well for our existing users, the onboarding process could be better.

    To improve our customer experience, I would like to build a self-service portal to make it easy for people to accomplish common actions. To get started, I would have the portal create Jira SD tickets for our customers to have better information in our tickets, but eventually I want to add automation to reduce our workload.

    Goals

    • Build a frontend website (Angular) that helps customers create Jira SD tickets.
    • Build a backend (Rust with Axum) for the backend, which would do all the hard work for the frontend.

    Resources (SUSE VPN only)

    • development site: https://ui-dev.openplatform.suse.com/login?returnUrl=%2Fopenplatform%2Fforms
    • https://gitlab.suse.de/itpe/core/open-platform/op-portal/backend
    • https://gitlab.suse.de/itpe/core/open-platform/op-portal/frontend


    Cluster API Provider for Harvester by rcase

    Project Description

    The Cluster API "infrastructure provider" for Harvester, also named CAPHV, makes it possible to use Harvester with Cluster API. This enables people and organisations to create Kubernetes clusters running on VMs created by Harvester using a declarative spec.

    The project has been bootstrapped in HackWeek 23, and its code is available here.

    Work done in HackWeek 2023

    • Have a early working version of the provider available on Rancher Sandbox : *DONE *
    • Demonstrated the created cluster can be imported using Rancher Turtles: DONE
    • Stretch goal - demonstrate using the new provider with CAPRKE2: DONE and the templates are available on the repo

    DONE in HackWeek 24:

    DONE in 2025 (out of Hackweek)

    • Support of ClusterClass
    • Add to clusterctl community providers, you can add it directly with clusterctl
    • Testing on newer versions of Harvester v1.4.X and v1.5.X
    • Support for clusterctl generate cluster ...
    • Improve Status Conditions to reflect current state of Infrastructure
    • Improve CI (some bugs for release creation)

    Goals for HackWeek 2025

    • FIRST and FOREMOST, any topic is important to you
    • Add e2e testing
    • Certify the provider for Rancher Turtles
    • Add Machine pool labeling
    • Add PCI-e passthrough capabilities.
    • Other improvement suggestions are welcome!

    Thanks to @isim and Dominic Giebert for their contributions!

    Resources

    Looking for help from anyone interested in Cluster API (CAPI) or who wants to learn more about Harvester.

    This will be an infrastructure provider for Cluster API. Some background reading for the CAPI aspect:


    Rancher/k8s Trouble-Maker by tonyhansen

    Project Description

    When studying for my RHCSA, I found trouble-maker, which is a program that breaks a Linux OS and requires you to fix it. I want to create something similar for Rancher/k8s that can allow for troubleshooting an unknown environment.

    Goals for Hackweek 25

    • Update to modern Rancher and verify that existing tests still work
    • Change testing logic to populate secrets instead of requiring a secondary script
    • Add new tests

    Goals for Hackweek 24 (Complete)

    • Create a basic framework for creating Rancher/k8s cluster lab environments as needed for the Break/Fix
    • Create at least 5 modules that can be applied to the cluster and require troubleshooting

    Resources

    • https://github.com/celidon/rancher-troublemaker
    • https://github.com/rancher/terraform-provider-rancher2
    • https://github.com/rancher/tf-rancher-up
    • https://github.com/rancher/quickstart


    Bugzilla goes AI - Phase 1 by nwalter

    Description

    This project, Bugzilla goes AI, aims to boost developer productivity by creating an autonomous AI bug agent during Hackweek. The primary goal is to reduce the time employees spend triaging bugs by integrating Ollama to summarize issues, recommend next steps, and push focused daily reports to a Web Interface.

    Goals

    To reduce employee time spent on Bugzilla by implementing an AI tool that triages and summarizes bug reports, providing actionable recommendations to the team via Web Interface.

    Project Charter

    https://docs.google.com/document/d/1HbAvgrg8T3pd1FIx74nEfCObCljpO77zz5In_Jpw4as/edit?usp=sharing## Description

    Project Achievements during Hackweek

    In this file you can read about what we achieved during Hackweek.

    https://docs.google.com/document/d/14gtG9-ZvVpBgkh33Z4AM6iLFWqZcicQPD41MM-Pg0/edit?usp=sharing


    HTTP API for nftables by crameleon

    Background

    The idea originated in https://progress.opensuse.org/issues/164060 and is about building RESTful API which translates authorized HTTP requests to operations in nftables, possibly utilizing libnftables-json(5).

    Originally, I started developing such an interface in Go, utilizing https://github.com/google/nftables. The conversion of string networks to nftables set elements was problematic (unfortunately no record of details), and I started a second attempt in Python, which made interaction much simpler thanks to native nftables Python bindings.

    Goals

    1. Find and track the issue with google/nftables
    2. Revisit and polish the Go or Python code (prefer Go, but possibly depends on implementing missing functionality), primarily the server component
    3. Finish functionality to interact with nftables sets (retrieving and updating elements), which are of interest for the originating issue
    4. Align test suite
    5. Packaging

    Resources

    • https://git.netfilter.org/nftables/tree/py/src/nftables.py
    • https://git.com.de/Georg/nftables-http-api (to be moved to GitHub)
    • https://build.opensuse.org/package/show/home:crameleon:containers/pytest-nftables-container

    Results

    • Started new https://github.com/tacerus/nftables-http-api.
    • First Go nftables issue was related to set elements needing to be added with different start and end addresses - coincidentally, this was recently discovered by someone else, who added a useful helper function for this: https://github.com/google/nftables/pull/342.
    • Further improvements submitted: https://github.com/google/nftables/pull/347.

    Side results

    Upon starting to unify the structure and implementing more functionality, missing JSON output support was noticed for some subcommands in libnftables. Submitted patches here as well:

    • https://lore.kernel.org/netfilter-devel/20251203131736.4036382-2-georg@syscid.com/T/#u


    go-git: unlocking SHA256-based repository cloning ahead of git v3 by pgomes

    Description

    The go-git library implements the git internals in pure Go, so that any Go application can handle not only Git repositories, but also lower-level primitives (e.g. packfiles, idxfiles, etc) without needing to shell out to the git binary.

    The focus for this Hackweek is to fast track key improvements for the project ahead of the upstream release of Git V3, which may take place at some point next year.

    Goals

    Stretch goals

    Resources

    • https://github.com/go-git/go-git/
    • https://go-git.github.io/docs/


    Play with the userfaultfd(2) system call and download on demand using HTTP Range Requests with Golang by rbranco

    Description

    The userfaultfd(2) is a cool system call to handle page faults in user-space. This should allow me to list the contents of an ISO or similar archive without downloading the whole thing. The userfaultfd(2) part can also be done in theory with the PROT_NONE mprotect + SIGSEGV trick, for complete Unix portability, though reportedly being slower.

    Goals

    1. Create my own library for userfaultfd(2) in Golang.
    2. Create my own library for HTTP Range Requests.
    3. Complete portability with Unix.
    4. Benchmarks.
    5. Contribute some tests to LTP.

    Resources

    1. https://docs.kernel.org/admin-guide/mm/userfaultfd.html
    2. https://www.cons.org/cracauer/cracauer-userfaultfd.html


    Create a Cloud-Native policy engine with notifying capabilities to optimize resource usage by gbazzotti

    Description

    The goal of this project is to begin the initial phase of development of an all-in-one Cloud-Native Policy Engine that notifies resource owners when their resources infringe predetermined policies. This was inspired by a current issue in the CES-SRE Team where other solutions seemed to not exactly correspond to the needs of the specific workloads running on the Public Cloud Team space.

    The initial architecture can be checked out on the Repository listed under Resources.

    Among the features that will differ this project from other monitoring/notification systems:

    • Pre-defined sensible policies written at the software-level, avoiding a learning curve by requiring users to write their own policies
    • All-in-one functionality: logging, mailing and all other actions are not required to install any additional plugins/packages
    • Easy account management, being able to parse all required configuration by a single JSON file
    • Eliminate integrations by not requiring metrics to go through a data-agreggator

    Goals

    • Create a minimal working prototype following the workflow specified on the documentation
    • Provide instructions on installation/usage
    • Work on email notifying capabilities

    Resources


    Rewrite Distrobox in go (POC) by fabriziosestito

    Description

    Rewriting Distrobox in Go.

    Main benefits:

    • Easier to maintain and to test
    • Adapter pattern for different container backends (LXC, systemd-nspawn, etc.)

    Goals

    • Build a minimal starting point with core commands
    • Keep the CLI interface compatible: existing users shouldn't notice any difference
    • Use a clean Go architecture with adapters for different container backends
    • Keep dependencies minimal and binary size small
    • Benchmark against the original shell script

    Resources

    • Upstream project: https://github.com/89luca89/distrobox/
    • Distrobox site: https://distrobox.it/
    • ArchWiki: https://wiki.archlinux.org/title/Distrobox


    Contribute to terraform-provider-libvirt by pinvernizzi

    Description

    The SUSE Manager (SUMA) teams' main tool for infrastructure automation, Sumaform, largely relies on terraform-provider-libvirt. That provider is also widely used by other teams, both inside and outside SUSE.

    It would be good to help the maintainers of this project and give back to the community around it, after all the amazing work that has been already done.

    If you're interested in any of infrastructure automation, Terraform, virtualization, tooling development, Go (...) it is also a good chance to learn a bit about them all by putting your hands on an interesting, real-use-case and complex project.

    Goals

    • Get more familiar with Terraform provider development and libvirt bindings in Go
    • Solve some issues and/or implement some features
    • Get in touch with the community around the project

    Resources


    Help Create A Chat Control Resistant Turnkey Chatmail/Deltachat Relay Stack - Rootless Podman Compose, OpenSUSE BCI, Hardened, & SELinux by 3nd5h1771fy

    Description

    The Mission: Decentralized & Sovereign Messaging

    FYI: If you have never heard of "Chatmail", you can visit their site here, but simply put it can be thought of as the underlying protocol/platform decentralized messengers like DeltaChat use for their communications. Do not confuse it with the honeypot looking non-opensource paid for prodect with better seo that directs you to chatmailsecure(dot)com

    In an era of increasing centralized surveillance by unaccountable bad actors (aka BigTech), "Chat Control," and the erosion of digital privacy, the need for sovereign communication infrastructure is critical. Chatmail is a pioneering initiative that bridges the gap between classic email and modern instant messaging, offering metadata-minimized, end-to-end encrypted (E2EE) communication that is interoperable and open.

    However, unless you are a seasoned sysadmin, the current recommended deployment method of a Chatmail relay is rigid, fragile, difficult to properly secure, and effectively takes over the entire host the "relay" is deployed on.

    Why This Matters

    A simple, host agnostic, reproducible deployment lowers the entry cost for anyone wanting to run a privacy‑preserving, decentralized messaging relay. In an era of perpetually resurrected chat‑control legislation threats, EU digital‑sovereignty drives, and many dangers of using big‑tech messaging platforms (Apple iMessage, WhatsApp, FB Messenger, Instagram, SMS, Google Messages, etc...) for any type of communication, providing an easy‑to‑use alternative empowers:

    • Censorship resistance - No single entity controls the relay; operators can spin up new nodes quickly.
    • Surveillance mitigation - End‑to‑end OpenPGP encryption ensures relay operators never see plaintext.
    • Digital sovereignty - Communities can host their own infrastructure under local jurisdiction, aligning with national data‑policy goals.

    By turning the Chatmail relay into a plug‑and‑play container stack, we enable broader adoption, foster a resilient messaging fabric, and give developers, activists, and hobbyists a concrete tool to defend privacy online.

    Goals

    As I indicated earlier, this project aims to drastically simplify the deployment of Chatmail relay. By converting this architecture into a portable, containerized stack using Podman and OpenSUSE base container images, we can allow anyone to deploy their own censorship-resistant, privacy-preserving communications node in minutes.

    Our goal for Hack Week: package every component into containers built on openSUSE/MicroOS base images, initially orchestrated with a single container-compose.yml (podman-compose compatible). The stack will:

    • Run on any host that supports Podman (including optimizations and enhancements for SELinux‑enabled systems).
    • Allow network decoupling by refactoring configurations to move from file-system constrained Unix sockets to internal TCP networking, allowing containers achieve stricter isolation.
    • Utilize Enhanced Security with SELinux by using purpose built utilities such as udica we can quickly generate custom SELinux policies for the container stack, ensuring strict confinement superior to standard/typical Docker deployments.
    • Allow the use of bind or remote mounted volumes for shared data (/var/vmail, DKIM keys, TLS certs, etc.).
    • Replace the local DNS server requirement with a remote DNS‑provider API for DKIM/TXT record publishing.

    By delivering a turnkey, host agnostic, reproducible deployment, we lower the barrier for individuals and small communities to launch their own chatmail relays, fostering a decentralized, censorship‑resistant messaging ecosystem that can serve DeltaChat users and/or future services adopting this protocol

    Resources


    Add support for todo.sr.ht to git-bug by mcepl

    Description

    I am a big fan of distributed issue tracking and the best (and possibly) only credible such issue tracker is now git-bug. It has bridges to another centralized issue trackers, so user can download (and modify) issues on GitHub, GitLab, Launchpad, Jira). I am also a fan of SourceHut, which has its own issue tracker, so I would like it bridge the two. Alas, I don’t know much about Go programming language (which the git-bug is written) and absolutely nothing about GraphQL (which todo.sr.ht uses for communication). AI to the rescue. I would like to vibe code (and eventually debug and make functional) bridge to the SourceHut issue tracker.

    Goals

    Functional fix for https://github.com/git-bug/git-bug/issues/1024

    Resources

    • anybody how actually understands how GraphQL and authentication on SourceHut (OAuth2) works


    Create a go module to wrap happy-compta.fr by cbosdonnat

    Description

    https://happy-compta.fr is a tool for french work councils simple book keeping. While it does the job, it has no API to work with and it is tedious to enter loads of operations.

    Goals

    Write a go client module to be used as an API to programmatically manipulate the tool.

    Writing an example tool to load data from a CSV file would be good too.


    HTTP API for nftables by crameleon

    Background

    The idea originated in https://progress.opensuse.org/issues/164060 and is about building RESTful API which translates authorized HTTP requests to operations in nftables, possibly utilizing libnftables-json(5).

    Originally, I started developing such an interface in Go, utilizing https://github.com/google/nftables. The conversion of string networks to nftables set elements was problematic (unfortunately no record of details), and I started a second attempt in Python, which made interaction much simpler thanks to native nftables Python bindings.

    Goals

    1. Find and track the issue with google/nftables
    2. Revisit and polish the Go or Python code (prefer Go, but possibly depends on implementing missing functionality), primarily the server component
    3. Finish functionality to interact with nftables sets (retrieving and updating elements), which are of interest for the originating issue
    4. Align test suite
    5. Packaging

    Resources

    • https://git.netfilter.org/nftables/tree/py/src/nftables.py
    • https://git.com.de/Georg/nftables-http-api (to be moved to GitHub)
    • https://build.opensuse.org/package/show/home:crameleon:containers/pytest-nftables-container

    Results

    • Started new https://github.com/tacerus/nftables-http-api.
    • First Go nftables issue was related to set elements needing to be added with different start and end addresses - coincidentally, this was recently discovered by someone else, who added a useful helper function for this: https://github.com/google/nftables/pull/342.
    • Further improvements submitted: https://github.com/google/nftables/pull/347.

    Side results

    Upon starting to unify the structure and implementing more functionality, missing JSON output support was noticed for some subcommands in libnftables. Submitted patches here as well:

    • https://lore.kernel.org/netfilter-devel/20251203131736.4036382-2-georg@syscid.com/T/#u


    Rewrite Distrobox in go (POC) by fabriziosestito

    Description

    Rewriting Distrobox in Go.

    Main benefits:

    • Easier to maintain and to test
    • Adapter pattern for different container backends (LXC, systemd-nspawn, etc.)

    Goals

    • Build a minimal starting point with core commands
    • Keep the CLI interface compatible: existing users shouldn't notice any difference
    • Use a clean Go architecture with adapters for different container backends
    • Keep dependencies minimal and binary size small
    • Benchmark against the original shell script

    Resources

    • Upstream project: https://github.com/89luca89/distrobox/
    • Distrobox site: https://distrobox.it/
    • ArchWiki: https://wiki.archlinux.org/title/Distrobox


    dynticks-testing: analyse perf / trace-cmd output and aggregate data by m.crivellari

    Description

    dynticks-testing is a project started years ago by Frederic Weisbecker. One of the feature is to check the actual configuration (isolcpus, irqaffinity etc etc) and give feedback on it.

    An important goal of this tool is to parse the output of trace-cmd / perf and provide more readable data, showing the duration of every events grouped by PID (showing also the CPU number, if the tasks has been migrated etc).

    An example of data captured on my laptop (incomplete!!):

              -0     [005] dN.2. 20310.270699: sched_wakeup:         WaylandProxy:46380 [120] CPU:005
              -0     [005] d..2. 20310.270702: sched_switch:         swapper/5:0 [120] R ==> WaylandProxy:46380 [120]
    ...
        WaylandProxy-46380 [004] d..2. 20310.295397: sched_switch:         WaylandProxy:46380 [120] S ==> swapper/4:0 [120]
              -0     [006] d..2. 20310.295397: sched_switch:         swapper/6:0 [120] R ==> firefox:46373 [120]
             firefox-46373 [006] d..2. 20310.295408: sched_switch:         firefox:46373 [120] S ==> swapper/6:0 [120]
              -0     [004] dN.2. 20310.295466: sched_wakeup:         WaylandProxy:46380 [120] CPU:004
    

    Output of noise_parse.py:

    Task: WaylandProxy Pid: 46380 cpus: {4, 5} (Migrated!!!)
            Wakeup Latency                                Nr:        24     Duration:          89
            Sched switch: kworker/12:2                    Nr:         1     Duration:           6
    

    My first contribution is around Nov. 2024!

    Goals

    • add more features (eg cpuset)
    • test / bugfix

    Resources

    Progresses

    isolcpus and cpusets implemented and merged in master: dynticks-testing.git commit


    RMT.rs: High-Performance Registration Path for RMT using Rust by gbasso

    Description

    The SUSE Repository Mirroring Tool (RMT) is a critical component for managing software updates and subscriptions, especially for our Public Cloud Team (PCT). In a cloud environment, hundreds or even thousands of new SUSE instances (VPS/EC2) can be provisioned simultaneously. Each new instance attempts to register against an RMT server, creating a "thundering herd" scenario.

    We have observed that the current RMT server, written in Ruby, faces performance issues under this high-concurrency registration load. This can lead to request overhead, slow registration times, and outright registration failures, delaying the readiness of new cloud instances.

    This Hackweek project aims to explore a solution by re-implementing the performance-critical registration path in Rust. The goal is to leverage Rust's high performance, memory safety, and first-class concurrency handling to create an alternative registration endpoint that is fast, reliable, and can gracefully manage massive, simultaneous request spikes.

    The new Rust module will be integrated into the existing RMT Ruby application, allowing us to directly compare the performance of both implementations.

    Goals

    The primary objective is to build and benchmark a high-performance Rust-based alternative for the RMT server registration endpoint.

    Key goals for the week:

    1. Analyze & Identify: Dive into the SUSE/rmt Ruby codebase to identify and map out the exact critical path for server registration (e.g., controllers, services, database interactions).
    2. Develop in Rust: Implement a functionally equivalent version of this registration logic in Rust.
    3. Integrate: Explore and implement a method for Ruby/Rust integration to "hot-wire" the new Rust module into the RMT application. This may involve using FFI, or libraries like rb-sys or magnus.
    4. Benchmark: Create a benchmarking script (e.g., using k6, ab, or a custom tool) that simulates the high-concurrency registration load from thousands of clients.
    5. Compare & Present: Conduct a comparative performance analysis (requests per second, latency, success/error rates, CPU/memory usage) between the original Ruby path and the new Rust path. The deliverable will be this data and a summary of the findings.

    Resources

    • RMT Source Code (Ruby):
      • https://github.com/SUSE/rmt
    • RMT Documentation:
      • https://documentation.suse.com/sles/15-SP7/html/SLES-all/book-rmt.html
    • Tooling & Stacks:
      • RMT/Ruby development environment (for running the base RMT)
      • Rust development environment (rustup, cargo)
    • Potential Integration Libraries:
      • rb-sys: https://github.com/oxidize-rb/rb-sys
      • Magnus: https://github.com/matsadler/magnus
    • Benchmarking Tools:
      • k6 (https://k6.io/)
      • ab (ApacheBench)


    RMT.rs: High-Performance Registration Path for RMT using Rust by gbasso

    Description

    The SUSE Repository Mirroring Tool (RMT) is a critical component for managing software updates and subscriptions, especially for our Public Cloud Team (PCT). In a cloud environment, hundreds or even thousands of new SUSE instances (VPS/EC2) can be provisioned simultaneously. Each new instance attempts to register against an RMT server, creating a "thundering herd" scenario.

    We have observed that the current RMT server, written in Ruby, faces performance issues under this high-concurrency registration load. This can lead to request overhead, slow registration times, and outright registration failures, delaying the readiness of new cloud instances.

    This Hackweek project aims to explore a solution by re-implementing the performance-critical registration path in Rust. The goal is to leverage Rust's high performance, memory safety, and first-class concurrency handling to create an alternative registration endpoint that is fast, reliable, and can gracefully manage massive, simultaneous request spikes.

    The new Rust module will be integrated into the existing RMT Ruby application, allowing us to directly compare the performance of both implementations.

    Goals

    The primary objective is to build and benchmark a high-performance Rust-based alternative for the RMT server registration endpoint.

    Key goals for the week:

    1. Analyze & Identify: Dive into the SUSE/rmt Ruby codebase to identify and map out the exact critical path for server registration (e.g., controllers, services, database interactions).
    2. Develop in Rust: Implement a functionally equivalent version of this registration logic in Rust.
    3. Integrate: Explore and implement a method for Ruby/Rust integration to "hot-wire" the new Rust module into the RMT application. This may involve using FFI, or libraries like rb-sys or magnus.
    4. Benchmark: Create a benchmarking script (e.g., using k6, ab, or a custom tool) that simulates the high-concurrency registration load from thousands of clients.
    5. Compare & Present: Conduct a comparative performance analysis (requests per second, latency, success/error rates, CPU/memory usage) between the original Ruby path and the new Rust path. The deliverable will be this data and a summary of the findings.

    Resources

    • RMT Source Code (Ruby):
      • https://github.com/SUSE/rmt
    • RMT Documentation:
      • https://documentation.suse.com/sles/15-SP7/html/SLES-all/book-rmt.html
    • Tooling & Stacks:
      • RMT/Ruby development environment (for running the base RMT)
      • Rust development environment (rustup, cargo)
    • Potential Integration Libraries:
      • rb-sys: https://github.com/oxidize-rb/rb-sys
      • Magnus: https://github.com/matsadler/magnus
    • Benchmarking Tools:
      • k6 (https://k6.io/)
      • ab (ApacheBench)