Cluster API vs Omni

Cluster API is an open-source project for managing the lifecycle of multiple Kubernetes clusters through declarative APIs and tooling. Platform operators can use it to create, scale, upgrade, and destroy Kubernetes-conformant clusters across on-premises and cloud environments. Provider implementations are interchangeable; kubeadm is the default bootstrap provider. The ecosystem includes infrastructure, bootstrap, control plane, IPAM, addon, and runtime extensions, with environments such as AWS, Azure, GCP, OpenStack, vSphere, and KubeVirt. A management cluster can use clusterctl or the Cluster API Operator to manage provider components. Clusterctl fetches provider component YAML and installs it, while the Operator uses a declarative approach intended to support GitOps workflows. Getting started requires an existing Kubernetes cluster accessible through kubectl; kind, Docker, and Helm are common prerequisites. Cluster API supports multi-cluster provisioning and upgrades, but does not manage a single cluster spanning multiple infrastructure providers or clusters it did not provision. It is free and open source. The project supports its latest two minor releases, with each supported for roughly 12 months including maintenance.

Omni is a fleet management service for provisioning, configuring, upgrading, and backing up Talos clusters across bare metal, edge, and cloud. Platform teams can use it as SaaS or self-host it, including in disconnected and air-gapped environments. It supports infrastructure such as KubeVirt, libvirt, vSphere, and Proxmox, as well as providers built by the team. Declarative templates keep clusters aligned with specified configurations. Fleet-wide Talos and Kubernetes upgrades include health checks, atomic updates per node, and automatic rollback on failure. Omni connects to nodes through WireGuard; KubeSpan can extend encryption across clusters and sites. Workload Proxy routes HTTP service traffic to a cluster through that tunnel using an identity-provider-gated URL. SAML or OIDC authentication, per-cluster roles, and change auditing are available through the UI or API. Hobby costs $10 per month for up to 10 nodes and 2 users; Startup costs $25 per node per month for up to 50 nodes and unlimited clusters. A 14-day trial requires no credit card.