SUSE Rancher

What is SUSE Rancher?

SUSE Rancher is a Kubernetes management platform - one interface to manage multiple K8s clusters, regardless of where they run (on-prem, cloud, edge). Includes K3s, RKE2, Fleet and Longhorn.

Key Functions:

• Multi-cluster - manage any number of clusters
• K3s - lightweight K8s for edge and IoT
• RKE2 - security-focused enterprise K8s
• Fleet - GitOps for multi-cluster

Be aware that central fleet management creates a single point from which everything is visible — and from which everything can be reached. We cover the consequences below.

What problem does it solve?

flowchart LR
    subgraph Kubernetes Chaos
        A[Cluster AWS] --> B[Separate tools]
        C[Cluster Azure] --> D[Separate tools]
        E[Cluster On-prem] --> F[Separate tools]
        B --> G[No consistency]
        D --> G
        F --> G
    end

    subgraph Rancher
        H[Cluster AWS] --> I[Rancher]
        J[Cluster Azure] --> I
        K[Cluster On-prem] --> I
        I --> L[Unified Management]
    end

    style A fill:#6366f1,stroke:#4f46e5,color:#fff
    style C fill:#6366f1,stroke:#4f46e5,color:#fff
    style E fill:#6366f1,stroke:#4f46e5,color:#fff
    style B fill:#dc2626,stroke:#b91c1c,color:#fff
    style D fill:#dc2626,stroke:#b91c1c,color:#fff
    style F fill:#dc2626,stroke:#b91c1c,color:#fff
    style G fill:#dc2626,stroke:#b91c1c,color:#fff
    style H fill:#6366f1,stroke:#4f46e5,color:#fff
    style J fill:#6366f1,stroke:#4f46e5,color:#fff
    style K fill:#6366f1,stroke:#4f46e5,color:#fff
    style I fill:#22c55e,stroke:#16a34a,color:#fff
    style L fill:#22c55e,stroke:#16a34a,color:#fff

Common Problems:

• Multiple K8s clusters = multiple management tools
• No consistent security policies
• Different Kubernetes versions
• Difficult multi-cluster application deployment
• Edge Kubernetes = no standard tools

Rancher Ecosystem

flowchart TD
    A[Rancher Management] --> B[Downstream Clusters]

    B --> C[RKE2<br>Enterprise K8s]
    B --> D[K3s<br>Edge K8s]
    B --> E[EKS/AKS/GKE<br>Managed K8s]
    B --> F[Imported<br>Any K8s]

    A --> G[Fleet<br>GitOps]
    A --> H[Longhorn<br>Storage]
    A --> I[NeuVector<br>Security]
    A --> J[Harvester<br>HCI]

    style A fill:#f59e0b,stroke:#d97706,color:#fff
    style B fill:#8b5cf6,stroke:#7c3aed,color:#fff
    style C fill:#22c55e,stroke:#16a34a,color:#fff
    style D fill:#22c55e,stroke:#16a34a,color:#fff
    style E fill:#22c55e,stroke:#16a34a,color:#fff
    style F fill:#22c55e,stroke:#16a34a,color:#fff
    style G fill:#6366f1,stroke:#4f46e5,color:#fff
    style H fill:#6366f1,stroke:#4f46e5,color:#fff
    style I fill:#6366f1,stroke:#4f46e5,color:#fff
    style J fill:#6366f1,stroke:#4f46e5,color:#fff

Products in Rancher Ecosystem

Rancher vs OpenShift vs Tanzu

Aspect	Rancher	Red Hat OpenShift	Tanzu
License	Open Source + Support	Subscription	Subscription
Multi-cluster	Native	ACM (additional)	TMC
K8s distros	K3s, RKE2, any	OpenShift only	TKG only
Edge	K3s (excellent)	MicroShift	Limited
Storage	Longhorn (free)	ODF (additional)	vSAN
Security	NeuVector (free)	ACS (additional)	Carbon Black
Price	Competitive	Premium	Premium
Vendor lock-in	Low (any K8s)	Medium	High (Broadcom)

Rancher Advantage:

• Open source core - zero licensing for basic features
• Manages any K8s (EKS, AKS, GKE, vanilla)
• K3s for edge - best lightweight K8s
• Fleet for GitOps at scale
• NeuVector and Longhorn built-in

Who is it for?

Use Cases

Specification

Parameter	Value
Clusters	Unlimited
Nodes per cluster	Unlimited
K8s distros	K3s, RKE2, EKS, AKS, GKE, any
GitOps	Fleet (built-in)
Storage	Longhorn (optional)
Security	NeuVector (optional)
Auth	LDAP, SAML, OIDC, GitHub, etc.
License	Apache 2.0 + SUSE Support

One console for many clusters

Centrally managing a fleet of clusters solves a real operational problem and, at the same time, creates a single point from which everything is visible.

• The reach of an admin account. Console privileges cover every connected cluster. That is the broadest access scope in the whole container environment and calls for multi-factor authentication and role separation.
• Cluster access files. Configurations downloaded by teams onto workstations contain long-lived credentials. Rotating them is often skipped.
• Policy consistency. The advantage is being able to enforce the same rules across all clusters at once — security rules included, not just operational ones.
• Clusters outside oversight. Environments created outside the central console fall under none of those policies, and usually nobody remembers them.

We verify privilege scope and policy consistency across clusters as part of security audits.

FAQ

How is it different from OpenShift? Rancher manages any K8s (EKS, GKE, vanilla). OpenShift is closed ecosystem. Rancher = flexibility, OpenShift = opinionated platform.

What is K3s vs RKE2? K3s - ultra lightweight for edge (< 100MB). RKE2 - enterprise, security-focused (CIS hardened, FIPS). Both are certified Kubernetes.

Can I manage EKS/AKS? Yes. Rancher can import and manage any K8s cluster, including managed.

How does Fleet work? GitOps controller. You define desired state in Git, Fleet deploys to selected clusters. Scales to thousands of clusters.

Is Rancher open source? Yes. Core is Apache 2.0. SUSE offers enterprise support as subscription.

Does nFlo deploy Rancher? Yes. Rancher deployments, K3s, RKE2. Fleet GitOps, Longhorn storage, NeuVector security. Multi-cluster architectures.