kOps vs openCenter

kOps is a free, open-source tool for creating, upgrading, maintaining, and destroying production-grade, highly available Kubernetes clusters. It also provisions the cloud infrastructure those clusters require, with the control plane managed by the customer. AWS and Google Cloud are officially supported; DigitalOcean, Hetzner, and OpenStack are in beta, while Azure is in alpha.

Configuration uses a YAML manifest-based API with templating and dry-run modes. State synchronization supports dry runs and automatic idempotency, and kOps can generate Terraform. It offers popular CNI networking providers out of the box and supports ARM64 architectures. kOps runs on Linux, macOS, and Windows; kubectl is required to install and use it. SSH access to masters and nodes is allowed from any address by default, although no public key is installed by default. SSH sources can be restricted in cluster configuration or with a command option. The security documentation says Pods can access the underlying instance IAM role and describes its permission scope as broad. The project points users to public office hours and Kubernetes Slack channels for support.

openCenter provides upstream Kubernetes with GitOps automation, security hardening, observability, backup and lifecycle management. It runs on OpenStack, VMware vSphere, AWS, bare metal and air-gapped sites. Its CLI uses declarative YAML to define infrastructure, Kubernetes, services and secrets, applying schema validation and business-rule checks before generating infrastructure-as-code, Kubespray inventory and FluxCD manifests with Kustomize overlays. Listed pre-hardened services include cert-manager, Kyverno, Keycloak, Harbor, Velero, MetalLB, Longhorn, Calico, PostgreSQL Operator and OpenStack CSI. Observability components include Prometheus, Grafana, Alertmanager, Loki, Tempo and OpenTelemetry. Security controls include Kyverno ClusterPolicies, Pod Security Admission, NetworkPolicies and group-based Keycloak OIDC access controls. Secrets can use SOPS Age encryption in Git, Kubernetes encryption at rest and key rotation. Air-gap packaging uses a Zarf artifact for images, charts and binaries, with signing and SBOM generation. Community is free; paid plans start at $125/mo. Rackspace Technology develops and maintains openCenter.