RKE2 vs K3s for Rancher Downstream Clusters
Choose RKE2 for general production clusters and K3s for edge or memory-constrained nodes; never mix distributions in one cluster.
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k3sRancher Fleet Label Targeting: A Practical Rollout Pattern for 10–500 Downstream Clusters
Rancher Fleet's hub-and-spoke GitOps model lets platform teams sync apps across many clusters using label selectors. Here is a concrete rollout pattern, verification steps, and the limits to plan around.
Diagnosing Rancher Downstream Cluster Showing Unknown or Error Status
Step‑by‑step guide to identify why a Rancher‑managed cluster appears Unknown/Error and restore connectivity by checking the cattle‑cluster‑agent, kubeconfig, and network paths.
kubernetesFine‑Grained Permissions in Rancher: A Practical Guide to RBAC for Multi‑Tenant Clusters
In a multi‑tenant Rancher environment, fine‑grained RBAC prevents accidental changes. This guide walks through creating a view‑only ClusterRole, binding it to a user group, and validating the permissions with concrete YAML and kubectl checks.
Diagnosing RKE2 Kubelet Stalls During Rancher 2.7+ Cluster Upgrades
Step‑by‑step diagnostic guide for RKE2 cluster upgrades that stall at the "updating kubelet" phase in Rancher 2.7+, covering causes, checks, fixes, and when to escalate.
Rancher Fleet: Deliver Helm Charts Across Clusters Without Sharing Kubeconfigs
Use Rancher Fleet GitRepo resources to centralize Helm and manifest delivery across downstream clusters while keeping CI out of individual cluster kubeconfigs.
Using Rancher’s Cluster API Toggle to Provision Clusters as CAPI Resources
Learn how to enable Rancher’s Cluster API toggle, create a cluster via UI or CLI, verify the CAPI objects, and avoid common pitfalls.
Deploying Rancher‑Managed Prometheus‑Grafana‑Alertmanager: An Architecture Note
Deploy the Rancher‑monitoring Helm chart for a lightweight Prometheus‑Grafana‑Alertmanager stack. This guide covers sizing, trust boundaries, operational checks, failure modes, and when to scale the design.
grafana
prometheusRancher Project Multi-Tenancy: One Cluster, Multiple Teams
Isolate team workloads in one Rancher cluster using Projects, resource quotas, and network policies without separate control planes.