kapp
troposphere
Our great sponsors
kapp | troposphere | |
---|---|---|
7 | 17 | |
859 | 4,901 | |
1.5% | 0.2% | |
8.1 | 9.0 | |
10 days ago | 3 days ago | |
Go | Python | |
Apache License 2.0 | BSD 2-clause "Simplified" License |
Stars - the number of stars that a project has on GitHub. Growth - month over month growth in stars.
Activity is a relative number indicating how actively a project is being developed. Recent commits have higher weight than older ones.
For example, an activity of 9.0 indicates that a project is amongst the top 10% of the most actively developed projects that we are tracking.
kapp
- HELM vs KUSTOMIZE
-
How to handle the lifecycle of multiple COTS
If you want to take it one step further: you might be applying several resources at a time that are logically one "application". kapp (https://carvel.dev/kapp/) lets you group those together and give them a name, and provides a "terraform-like" experience where it shows you its execution plan before applying updates. So then you might do `ytt -f | kapp deploy -a name-of-thing` Or you could use helm's templating engine but then still pass the resulting yaml to kapp for its unification of the deployment step.
-
Dhall: A Gateway Drug to Haskell
since you mentioned Kubernetes...
> It would be nice if there was a separate state reconciliation system that one could adapt to use with Cue or Dhall or any other frontend
this exactly was thinking behind https://carvel.dev/kapp for Kubernetes (i'm one of the maintainers). it makes a point to not know how you decided to generate your Kubernetes config -- just takes it as input.
> In particular the ability to import other files as semantic hashes seems like a great feature.
it's an interesting feature but seems like it should be unnecessary given that config can be easily checked into git (your own and its dependencies).
-
Terraform should have remained stateless
i think kubernetes is not a great example in favor of more client state (like tf) since k8s has uniform resource structure (metadata.*) and first class labeling support. but as you point out kubectl doesnt use labels well (at least imho).
when building https://carvel.dev/kapp (which i think of as "optimized terraform" for k8s) the goal was absolutely to take advantage of those k8s features. we ended up providing two capabilities: direct label (more advanced) and "app name" (more user friendly). from impl standpoint, difference is how much state is maintained.
"kapp deploy -a label:x=y -f ..." allows user to specify label that is applied to all deployed resources and is also used for querying k8s to determine whats out there under given label. invocation is completely stateless since burden of keeping/providing state (in this case the label x=y) is shifted to the user. downside of course is that all apis within k8s need to be iterated over. (side note, fun features like "kapp delete -a label:!x" are free thanks to k8s querying).
"kapp deploy -a my-app -f ..." gives user ability to associate name with uniquely auto-generated label. this case is more stateful than previous but again only label needs to be saved (we use ConfigMap to store that label). if this state is lost, one has to only recover generated label.
imho k8s api structure enables focused tools like kapp to be much much simpler than more generic tool like terraform. as much as i'd like for terraform to keep less state, i totally appreciate its needs to support lowest common denominator feature set.
common discussion topics:
-
Is there any CLI tool to sync between local yamls and current cluster namespace state?
Take a look at kapp (https://github.com/vmware-tanzu/carvel-kapp).
-
Deploy Neo4J's APOC plugin with code thanks to CARVEL vendir
kapp - Install, upgrade, and delete multiple Kubernetes resources as one "application"
-
Open Application Model – An open standard for defining cloud native apps
I really like this approach for simplifying Kubernetes. A few projects similar to OAM in that it provides a higher level "Application" CRD:
https://github.com/vmware-tanzu/carvel-kapp
troposphere
-
AWS Predictions for 2024
Under the IaC category, in July 2023, AWS added loops to CloudFormation, finally ticking a box the community has been asking for since troposphere. I suspect that, in combination with the Terraform licensing changes, it may keep people using CloudFormation for a while longer.
-
Journey of creating a new AWS CloudFormation resource
Because ECS Compose-X uses Troposphere, I was able to create a very light and simple python library(https://github.com/JohnPreston/troposphere-awscommunity-applicationautoscaling-scheduledaction) to distribute the resource for other Troposphere users to re-use.
- What are some of your favorite projects to support on GitHub?
-
Terraform vs. Cloudformation for an all-AWS Environment in 2023?
Written in house, but the library troposphere is the primary component of how it is built. Example stacks are here.
-
How proficient should Solution Architects be at writing code?
I am kind of going off topic here, but isn't the point of being an SA to be created with code services to deliver solutions at scale that are cost-effective? How in the hell can you do that when you can't write a simple Python template that generates code at 50 times the rate you can manually? How can you ever be expected to deploy a serverless solution if you can't write any code yourself? There has to be some level of proficiency there.
-
Terraform should have remained stateless
Wouldn't using troposphere[1] be easier?
[1] https://github.com/cloudtools/troposphere
-
Hosting your blog on AWS
You might have seen some tutorials on how to set up S3 buckets using the AWS Console. This works fine, but I'm a firm believer of managing your resources with code. I've chosen the native solution of AWS, called AWS CloudFormation. This makes it easier to reproduce the setup if I ever need to tear it down of move it to another account or region. Below is the full CloudFormation template, I've used a framework called Troposphere, a Python library that creates CloudFormation.
-
Alert: Cloud Software Startup Hashicorp Files For IPO
For CF for example I no longer write template in yaml or shudders json, and instead I use troposphere.
-
AWS pros out here, how can someone get good at CloudFormation ?
refer : https://github.com/cloudtools/troposphere
- Troposphere – A Python library which allows you build cloudformation templates
What are some alternatives?
kubevela - The Modern Application Platform.
terraform - Terraform enables you to safely and predictably create, change, and improve infrastructure. It is a source-available tool that codifies APIs into declarative configuration files that can be shared amongst team members, treated as code, edited, reviewed, and versioned.
argo-cd - Declarative Continuous Deployment for Kubernetes
aws-cloudformation-coverage-roadmap - The AWS CloudFormation Public Coverage Roadmap
Flux - Successor: https://github.com/fluxcd/flux2
gohugo-theme-ananke - Ananke: A theme for Hugo Sites
kapp-controller - Continuous delivery and package management for Kubernetes.
aws-cli - Universal Command Line Interface for Amazon Web Services
ytt - YAML templating tool that works on YAML structure instead of text
dhall-kubernetes - Typecheck, template and modularize your Kubernetes definitions with Dhall
carvel - Carvel provides a set of reliable, single-purpose, composable tools that aid in your application building, configuration, and deployment to Kubernetes. This repo contains information regarding the Carvel open-source community.
gitlab-ci-python-library