ytt
starlark-go
Our great sponsors
ytt | starlark-go | |
---|---|---|
14 | 21 | |
1,570 | 2,187 | |
2.4% | 1.6% | |
6.4 | 6.9 | |
15 days ago | 14 days ago | |
Go | Go | |
Apache License 2.0 | BSD 3-clause "New" or "Revised" License |
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ytt
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10 Ways for Kubernetes Declarative Configuration Management
YTT - YTT is a templating tool that understands YAML structure. It helps you easily configure complex software via reusable templates and user provided values using the Starlark language.
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Alternatives to Helm/Kustomize for complex Kubernetes Deployments
Adding https://carvel.dev/ytt/ to the list. I was happy using this tool as IMO it mixes good things from Helm and Kustomize, however the syntax is ugly and repelling my colleagues to have a closer look.
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The YAML Document from Hell
> Templating yaml is a terrible, terrible idea
I've had a good time using ytt: https://carvel.dev/ytt/. It implements language-aware templating, which is IMO the only reasonable way to do it.
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Creating Kubernetes Templates
`ytt` is part of the Carvel toolchain. https://carvel.dev/ytt/
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Dealing with YAML overload
I agree with you on `you will want to see just plain texts instead of a bunch of templating token with hidden logic.` Which is why I think https://carvel.dev/ytt/ would be great. We could generate these templates in pipelines, or we could just make it easier to maintain what we have.
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How to handle the lifecycle of multiple COTS
For more advanced configuration management you might be interested in ytt ( https://carvel.dev/ytt/ ) which is a "yaml-aware" templating tool. it lets you do "patches" via an overlay mechanism to add or remove specific yaml blocks, and it also lets you use a simplified python dialect for more complicated logic. With ytt you would put your DNS IP into a "data values" file and then run ytt to render it into the configs before handing them off to the deployment tool. e.g. `ytt -f | kubectl apply`
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The Dhall Configuration Language
https://carvel.dev/ytt/
ytt lets you embed logic via a python-subset (starlark) and also provides "overlays" as a "replace/insert" mechanism. and all valid ytt files are valid yaml files, so they can be passed-through other yaml parsing stages.
I said this above as well: ytt (https://carvel.dev/ytt/) lets you embed starlark into valid yaml, among other cute tricks for managing biz-logic in configs.
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YAML and Configuration Files
This is why you should consider https://carvel.dev/ytt/
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Would a visual drag and drop builder for K8s clusters be useful to people here?
There's a reason that other tooling is taking different approaches. Visual workflows help for understanding existing manifests - but they'd be horrible for creating/modifying new ones.
starlark-go
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Python Is Easy. Go Is Simple. Simple = Easy
Starlark in go https://github.com/google/starlark-go is a great way to combine the best of both, the ease of use of Python and the simplicity of go.
I have been building a platform for deploying internal web applications using this approach https://github.com/claceio/clace. Use Starlark to configure the application, the platform itself is built in go.
- Show HN: Clace – Platform for secure internal web applications
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Examples of using task scheduler with Go?
The big unknown is your task definition: what does user-defined logic look like? If you're expecting go code, that's gonna need some cleverness because of the compiled nature of it. There's a node runtime implemented in go if you want to provide sandboxed javascript (check the source of k6.io, it's the main one I know that uses it). If you want to provide building blocks and let them compose them, starlark might be a good choice.
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Show HN: Gsubpy, an interpreter for subset of Python, written in Go
Another one of those (with broader language support) is the Starlark language, which has a Go implementation: https://github.com/google/starlark-go
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Looking for library to build composable actions from config file
Every config format gets as complex to be touring complete in the end. We had similar problems and eventually got rid of that complexity and switched to starlark (the bazel config language), was a huge benefit for the tools. https://github.com/google/starlark-go "Starlark is a dialect of Python intended for use as a configuration language. Like Python, it is an untyped dynamic language with high-level data types, first-class functions with lexical scope, and garbage collection."
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Looking for programming languages created with Go
Direct link to the Go implementation of Starlark: https://github.com/google/starlark-go
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Change go code behaviour at runtime
For a Python-like syntax, https://github.com/google/starlark-go is the language used in Babel. It's very mature, but since it is used in a massive mature project with a specific purpose, it doesn't move fast or drift from the spec of its Java-based sibling. It doesn't have exception try except blocks or some other features you might expect, but for short extension logic, it might be exactly what you want with the stability you can depend upon.
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A command-line tool to create development environments for AI/ML, based on Docker and buildkit
Thus envd is more like Dockerfile, while it uses a simplified python dialect starlark https://github.com/google/starlark-go as the build language.
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I'm building an experimental successor to Bazel™
Use Go (mostly for starlark-go)
- The Dhall Configuration Language
What are some alternatives?
kustomize - Customization of kubernetes YAML configurations
cue - CUE has moved to https://github.com/cue-lang/cue
tanka - Flexible, reusable and concise configuration for Kubernetes
strictyaml - Type-safe YAML parser and validator.
hull - The incredible HULL - Helm Uniform Layer Library - is a Helm library chart to improve Helm chart based workflows
cue - The home of the CUE language! Validate and define text-based and dynamic configuration
yaml-rust - A pure rust YAML implementation.
gopher-lua - GopherLua: VM and compiler for Lua in Go
kapp-controller - Continuous delivery and package management for Kubernetes.
jsonnet-libs - Grafana Labs' Jsonnet libraries