tofu-controller
kapp
tofu-controller | kapp | |
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14 | 7 | |
1,161 | 861 | |
3.9% | 0.7% | |
9.6 | 8.5 | |
9 days ago | 4 days ago | |
Go | Go | |
Apache License 2.0 | Apache License 2.0 |
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.
tofu-controller
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Self-service infrastructure as code
We stumbled upon a project for maintaining Terraform with CRDs that we could deploy with Helm. That project is now called Tofu-Controller - another WeaveWorks project, so it integrated great with our existing Flux setup.
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Weaveworks Seems to Be Disintegrating
https://github.com/weaveworks/tf-controller/issues/1166#issu...
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Disaster Recovery for AWS EKS Infra
Weave's TF-Controller, which also has fewer bugs, much better adoption, and it looks like it's actually being developed by someone. But requires a weird argocd <-> flux interop boilerplate. It's a "controller for flux" and not a Kubernetes controller, and I don't really get such ambiguous targeting , but meh...
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Migrate from terragrunt to terraform
Wrt tools, I wanted to integrate terraform with Flux thanks to their tf-controller. Conciling the core gitops features with terraform would be great imho.
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My recently deployed media apps in ArgoCD, migrating from Terraform.
I'm using Flux instead of Argo which has support for running terraform from a given Git Repo or OCI artifact so essentially I still fall back on Terraform when needed and it's applied via GitOps.
- Looking for teammate to join project (not a job posting)
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MySQL operators without the cluster
tf-controller which is integrated with Flux GitOps and reconciles Terraform files in a control loop
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Automate your Terraform using GitOps with Flux
While searching for alternatives for running Terraform using Kubernetes, I found several controllers and operators, but none that I felt had as much potential as the tf-controller from Weaveworks. We are already using Flux as our GitOps tool, and the tf-controller works by utilizing some of the core functionality from Flux, and has a custom resource for Terraform deployments. The source controller takes care of fetching our modules, the kustomize controllers apply the Terraform resources, and then the controller spin up static pods (called runners) that runs your Terraform commands.
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2022 was a great year for GitOps
For us, GitOps is a vital part of how we operate, and it is the magic sauce that fuels our platform offering. Not only do we use it for application deployments, but by utilizing the Weaveworks tf-controller, we can create services using Terraform to automate our infrastructure deployments.
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Terraform to deploy and KEDA to scale - will it work?
Some further research brought me to Weaveworks' TF-Controller which appears to be able to do what I want at least for the initial deployment step. Flux CD (also by Weaveworks) integrates with KEDA now, so it would be great if it could also integrate with KEDA to manage terraform-deployed Azure resources.
kapp
- HELM vs KUSTOMIZE
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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.
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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).
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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:
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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).
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Deploy Neo4J's APOC plugin with code thanks to CARVEL vendir
kapp - Install, upgrade, and delete multiple Kubernetes resources as one "application"
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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
What are some alternatives?
crossplane - The Cloud Native Control Plane
kubevela - The Modern Application Platform.
atlantis - Terraform Pull Request Automation
argo-cd - Declarative Continuous Deployment for Kubernetes
helm-operator - Successor: https://github.com/fluxcd/helm-controller — The Flux Helm Operator, once upon a time a solution for declarative Helming.
Flux - Successor: https://github.com/fluxcd/flux2
jsonnet-controller - A fluxcd controller for managing manifests declared in jsonnet
kapp-controller - Continuous delivery and package management for Kubernetes.
documents - 📑 Lasting documents from the GitOps Working Group which are versioned and released together (including the GitOps Principles and Glossary)
ytt - YAML templating tool that works on YAML structure instead of text
flux2 - Open and extensible continuous delivery solution for Kubernetes. Powered by GitOps Toolkit.
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.