terraform-provider-docker
kapp
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terraform-provider-docker | kapp | |
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3 | 7 | |
525 | 852 | |
2.9% | 1.1% | |
0.0 | 8.1 | |
8 days ago | 6 days ago | |
Go | Go | |
Mozilla Public 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.
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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.
terraform-provider-docker
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HELM vs KUSTOMIZE
... and if you're an opinionated person, like me, and you value consolidated infrastructure atomicity as a whole along side locks for everything. You'd port cherry-picked helm charts as terraform modules with k2tf, and build every docker container from scratch, with forced layer invalidation to perform security updates for every image, using the docker and kubernetes providers respectively.
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Deploying Go application on AWS with terraform
For the docker management, we are going to use terraform module kreuzwerker/docker. It provides us an opportunity to build and upload docker image to a docker repository.
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Maintaining the terraform provider for docker
Communication is crucial; that's why we want to keep it public, even if we receive private requests through other channels such as @gophers/terraform-provider-docker in Slack. We encourage engineers to open an issue or use the recently released discussions feature from GitHub. The code of conduct helped us set the etiquette guidelines, how we want to work together, and which tone and politeness we expect.
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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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:
What are some alternatives?
kubevela - The Modern Application Platform.
argo-cd - Declarative Continuous Deployment for Kubernetes
Flux - Successor: https://github.com/fluxcd/flux2
kapp-controller - Continuous delivery and package management for Kubernetes.
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.
ytt - YAML templating tool that works on YAML structure instead of text
terraform-provider-carvel - Carvel Terraform provider with resources for ytt and kapp to template and deploy to Kubernetes
asdf - k14s asdf plugin
kbld - kbld seamlessly incorporates image building and image pushing into your development and deployment workflows
homebrew - Provides tools from https://carvel.dev via Homebrew package.
troposphere - troposphere - Python library to create AWS CloudFormation descriptions
kubekey - Install Kubernetes/K3s only, both Kubernetes/K3s and KubeSphere, and related cloud-native add-ons, it supports all-in-one, multi-node, and HA 🔥 ⎈ 🐳