kubero VS cluster-api

For deploying your apps you could use something like Kubero (https://github.com/kubero-dev/kubero)

Repository: https://github.com/kubero-dev/kubero

Are you running Kubero in the background? Zeabur seems to have the same feature set, and Add-ons.

However, because I want to offer an MTA as an add-on for Kubero, my Heroku alternative, I have decided to create one with Haraka. Haraka is a well-known MTA and is used by Craigslist. This MTA is very flexible and can be extended with plugins. It is also highly performant and can run on minimal resources. Another important criterion is that it has been well maintained and developed for a long time.

I'm the maintainer of Kubero, which is pretty similar but requires a Kubernetes cluster, which might be a show-stopper in your case. But apart from that, Kubero would be able to fulfill your requirements:

Probably kubero

I'm self-hosting Heroku with Kubero.

In this blog post, we will demonstrate how easy and fast it is to deploy Sveltos on an RKE2 cluster with the help of ArgoCD, register two RKE2 Cluster API (CAPI) clusters and create a ClusterProfile to deploy Prometheus and Grafana Helm charts down the managed CAPI clusters.

4. Having moved to a container orchestrator, all of my nodes are immutable. Hardware and VM instances _can_ be born magically into existence. Nearly all infra providers support [cluster-api](https://cluster-api.sigs.k8s.io/). Network infrastructure can now be managed with TF, so I go that route.

## Linux curl -L https://github.com/kubernetes-sigs/cluster-api/releases/download/v1.4.4/clusterctl-linux-amd64 -o clusterctl sudo install -o root -g root -m 0755 clusterctl /usr/local/bin/clusterctl ## Mac brew install clusterctl

Did you ever try CAPI? https://github.com/kubernetes-sigs/cluster-api

You might find interesting the capi-rancher-import k8s operator we use in Sylva, it would adopt in Rancher server the Cluster API created k8s clusters (with bootstrap provider kubeadm or even rke2 - you can lookup CAPBR for the latter). I understand your clusters are not created by Cluster API, so if you could move the workloads/resources to new clusters created by Cluster API, this can come handy. (Adoption of non-CAPI clusters into CAPI is not yet a standard practice, more in https://github.com/kubernetes-sigs/cluster-api/issues/7776)

Most of the comments have mentioned older tools like kubespray, Ansible, Rancher etc. I would suggest the cloud native way using ClusterAPI or use a tool that relies on ClusterAPI in the backend called Talos

Cluster API

Sveltos is a powerful open source project that makes managing Kubernetes add-ons a breeze. It automatically discovers ClusterAPI powered clusters and allows you to easily register any other cluster (like GKE). Then, it seamlessly manages Kubernetes add-ons across all your clusters.