Johannes Kastl's avatar

Johannes Kastl

ojkastl_buildservice

Involved Projects and Packages
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Helm is a tool for managing Kubernetes charts. Charts are packages of pre-configured Kubernetes resources.

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Kubetui is a terminal user interface (TUI) tool designed for monitoring Kubernetes resources.
It provides an easy-to-use interface for developers and operators to access important information about their applications and infrastructure.

A toolkit for building secure, portable and lean operating systems for containers

longhornctl, a CLI (command-line interface) designed to simplify Longhorn manual operations.

What Can You Do With longhornctl?

- Install and verify prelight requirements.
- Execute one-time Longhorn operations.
- Gain inside into your Longhorn system.

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LXC is the well-known and heavily tested low-level Linux container runtime.

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LXCFS is a small FUSE filesystem written with the intention of making Linux containers feel more like a virtual machine. It started as a side-project of LXC but is useable by any runtime.

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Features

- Pull-through cache for _any_ registry, not just docker.io
- This includes private, authenticated registries. **This means that you can create an unauthenticated mirror of a private registry and expose it to the Internet. Easily. Don't do that.**
- Two storage back-ends
- S3
- Local filesystem
- Small footprint; in my test system, the official `registry` uses approximately 130 MiB of memory to mirror docker.io; five replicas of `oci-registry` combined use approximately 60 MiB to mirror everything in [example.yaml](example.yaml), plus one private registry. CPU is negligible for both.

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Client interface for the registry API. This includes regctl for a command line interface to manage registries.

Slim helps you build optimized containers, while Root.io automatically fixes vulnerabilities without disrupting your workflows. Use Slim's open source toolkit to optimize containers, then keep them secure with Root's automated vulnerability remediation – from optimization to continuous security in one
seamless journey.

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wolfictl is a command line tool for working with Wolfi

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youki is an implementation of the OCI runtime-spec in Rust, similar to runc.

Here is why we are writing a new container runtime in Rust.

* Rust is one of the best languages to implement the oci-runtime spec. Many very nice container tools are currently written in Go. However, the container runtime requires the use of system calls, which requires a bit of special handling when implemented in Go. This is too tricky (e.g. namespaces(7), fork(2)); with Rust, it's not that tricky. And, unlike in C, Rust provides the benefit of memory safety. While Rust is not yet a major player in the container field, it has the potential to contribute a lot: something this project attempts to exemplify.

* youki has the potential to be faster and use less memory than runc, and therefore work in environments with tight memory usage requirements. Here is a simple benchmark of a container from creation to deletion.

Runtime Time (mean ± σ) Range (min … max)
youki 198.4 ms ± 52.1 ms 97.2 ms … 296.1 ms
runc 352.3 ms ± 53.3 ms 248.3 ms … 772.2 ms
crun 153.5 ms ± 21.6 ms 80.9 ms … 196.6 ms

* I have fun implementing this. In fact, this may be the most important.

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This is the factory development project for Vagrant

This plugin allows obtaining a public IP address of a guest machine.

This uses a fork with small adjustments to make this work with up-to-date ruby and bundler versions.
https://github.com/johanneskastl/vagrant-address

This is a Vagrant plugin that adds a Libvirt provider to Vagrant, allowing
Vagrant to control and provision machines via the Libvirt toolkit.

Tools for VMware

The CLI is designed to be a user friendly CLI alternative to the GUI and well suited for automation tasks. It also acts as a test harness for the govmomi APIs and provides working examples of how to use the APIs.

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