RKE2 K8s Cluster: Capsule, Ceph & OIDC (ICSC)

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Presentazione finale – Cluster Kubernetes RKE2 con Capsule, Ceph e OIDC (ICSC) **Slide 1 – Titolo** Cluster Kubernetes RKE2 con Capsule, Ceph e OIDC – Progetto ICSC Implementazione HA, multi-tenancy e autenticazione IAM INFN [Loghi: Kubernetes, Capsule, Ceph, Kube-VIP, INFN IAM] **Slide 2 – Architettura del Cluster** - 3 nodi controller (VM su Proxmox VE) - 4 nodi worker bare metal - Installazione RKE2 tramite modulo Puppet del backbone INFN 🧩 Schema architettura: controller in HA, worker, Puppet e Proxmox **Slide 3 – Storage (Ceph)** - Storage Ceph in produzione (Tier-2 Roma) - StorageClass: `ceph-rbd-csi` - Provisioning dinamico con CSI plugin ```yaml apiVersion: v1 kind: PersistentVolumeClaim metadata: name: pvc-ceph spec: storageClassName: ceph-rbd-csi accessModes: - ReadWriteOnce resources: requests: storage: 10Gi ``` [Logo Ceph] **Slide 4 – Capsule: Multi-Tenancy e Tenant** Capsule introduce un livello di multi-tenancy in Kubernetes, isolando gruppi di utenti in *tenant*, ciascuno con propri namespace, policy e risorse. Gestisce autorizzazioni basate su gruppi IAM e migliora la sicurezza tra team. ```yaml apiVersion: capsule.clastix.io/v1beta2 kind: Tenant metadata: name: tenant-test spec: owners: - kind: Group name: users ``` [Schema concettuale: utenti IAM → Capsule → Tenant → Namespace] **Slide 5 – OIDC Authentication & Authorization** Workflow di autenticazione e autorizzazione tramite token OIDC: 1. Configurazione OIDC su API Server 2. Creazione utente OIDC e generazione token 3. Accesso al cluster con token ```bash # Generazione token OIDC oidc-gen <username> --iss https://iam.cloud.infn.it -w device oidc-token --aud icsc-k8s-roma1 <username> # Accesso al cluster kubectl --token=$token get pods ``` [Diagramma: IAM → Token → API Server → Capsule] **Slide 6 – Kube-VIP e Alta Affidabilità** - Kube-VIP come DaemonSet su nodi controller per Virtual IP condiviso - Garantisce HA dell’API Server Kubernetes ```bash $KUBE_VIP_CMD manifest daemonset \ --interface eth0 \ --address 192.168.x.x \ --controlplane --services --arp --leaderElection ``` [Logo Kube-VIP + Schema VIP HA] **Slide 7 – Risultati e Test** Cluster completamente operativo e testato: - Creazione e gestione tenants via Capsule - Accesso differenziato utenti IAM - Visibilità limitata alle risorse dei tenant - Failover controller testato con successo ```bash kubectl --token=$token get tenants NAME STATE AGE tenant-test Active 1d ``` **Slide 8 – Conclusioni** ✅ Cluster RKE2 in HA ✅ Storage dinamico Ceph-RBD ✅ Multi-tenancy e OIDC operativi ✅ Infrastruttura scalabile e integrata INFN [Design: scuro, tecnico, con loghi software e stile uniforme]

HA RKE2 Kubernetes cluster on Proxmox/bare metal with Puppet install, Ceph CSI storage, Capsule multi-tenancy, OIDC IAM auth, Kube-VIP VIP, fully tested for ICSC/INFN project. (148 chars)

December 15, 20258 slides

Slide 1 of 8

Slide 1 - Cluster Kubernetes RKE2 con Capsule, Ceph e OIDC – Progetto ICSC

This title slide introduces a Kubernetes RKE2 cluster integrated with Capsule, Ceph, and OIDC for the ICSC Project. The subtitle emphasizes high-availability (HA) implementation, multi-tenancy, and INFN IAM authentication.

Cluster Kubernetes RKE2 con Capsule, Ceph e OIDC – Progetto ICSC

Implementazione HA, multi-tenancy e autenticazione IAM INFN

Source: Presentazione finale – Cluster Kubernetes RKE2 con Capsule, Ceph e OIDC (ICSC)

Speaker Notes

[Loghi: Kubernetes, Capsule, Ceph, Kube-VIP, INFN IAM]

Slide 1 - Cluster Kubernetes RKE2 con Capsule, Ceph e OIDC – Progetto ICSC

Slide 2 of 8

Slide 2 - Architettura del Cluster

The cluster architecture consists of 3 controller nodes as VMs on Proxmox VE and 4 bare metal worker nodes. RKE2 is installed via the INFN Puppet module, with an HA schema covering controllers, workers, Puppet, and Proxmox.

Architettura del Cluster

3 nodi controller come VM su Proxmox VE
4 nodi worker bare metal
Installazione RKE2 tramite modulo Puppet INFN
Schema HA: controller, worker, Puppet, Proxmox

Source: Presentazione finale – Cluster Kubernetes RKE2 con Capsule, Ceph e OIDC (ICSC)

Slide 3 of 8

Slide 3 - Storage (Ceph)

The slide covers production Ceph storage from Tier-2 Roma, configured via the ceph-rbd-csi StorageClass. It highlights dynamic provisioning enabled by the CSI plugin, with an example PVC requesting 10Gi in ReadWriteOnce mode.

Storage (Ceph)

Production Ceph storage from Tier-2 Roma
StorageClass configured as ceph-rbd-csi
Dynamic provisioning enabled via CSI plugin
PVC example requests 10Gi ReadWriteOnce

Source: Tier-2 Roma Production Cluster

Speaker Notes

```yaml apiVersion: v1 kind: PersistentVolumeClaim metadata: name: pvc-ceph spec: storageClassName: ceph-rbd-csi accessModes: - ReadWriteOnce resources: requests: storage: 10Gi ``` [Logo Ceph]

Slide 4 of 8

Slide 4 - Capsule: Multi-Tenancy e Tenant

Capsule isolates users into tenants using dedicated namespaces, policies, and resources, while managing IAM permissions for secure multi-tenancy that limits visibility and access between teams. The slide provides a YAML example of a Tenant resource and illustrates the schema: IAM → Capsule → Tenant → Namespace.

Capsule: Multi-Tenancy e Tenant

| Capsule isola utenti in tenant con namespace, policy e risorse dedicate. Gestisce autorizzazioni IAM per multi-tenancy sicura, limitando visibilità e accessi tra team. |

apiVersion: capsule.clastix.io/v1beta2kind: Tenantmetadata:  name: tenant-testspec:  owners:    - kind: Group      name: users

Isolamento Tenant con Capsule	Esempio YAML Tenant

Schema: IAM → Capsule → Tenant → Namespace |

Slide 4 - Capsule: Multi-Tenancy e Tenant

Slide 5 of 8

Slide 5 - OIDC Authentication & Authorization

This workflow details OIDC authentication and authorization in Kubernetes: configure the OIDC provider on the API Server, generate a token via IAM tools, and access the cluster using kubectl with the token. The API Server validates the token while Capsule enforces tenant policies and group-based access.

OIDC Authentication & Authorization

{ "headers": [ "Step", "Component", "Action / Command" ], "rows": [ [ "1. Config OIDC", "API Server", "Configure OIDC provider on Kubernetes API Server (issuer: https://iam.cloud.infn.it, client ID, etc.)" ], [ "2. Generate Token", "User / IAM",

oidc-gen <user> --iss https://iam.cloud.infn.itoidc-token --aud icsc-k8s-roma1

], [ "3. Access Cluster", "kubectl",

kubectl --token=$token get pods

" ], [ "4. Authorize", "API Server / Capsule", "API Server validates OIDC token; Capsule enforces tenant policies and group-based access" ] ]}Source: Workflow di autenticazione e autorizzazione tramite token OIDC

Speaker Notes

Diagramma: IAM → Token → API Server → Capsule Context: Presentazione finale – Cluster Kubernetes RKE2 con Capsule, Ceph e OIDC (ICSC)

Slide 5 - OIDC Authentication & Authorization

Slide 6 of 8

Slide 6 - Kube-VIP e Alta Affidabilità

Kube-VIP is deployed as a DaemonSet on controller nodes to provide a shared VIP for high availability of the Kubernetes API Server. The slide includes the command $KUBEVIPCMD manifest daemonset --interface eth0 --address 192.168.x.x --controlplane --services --arp --leaderElection for generating the manifest.

Kube-VIP e Alta Affidabilità

Kube-VIP DaemonSet su nodi controller
VIP condiviso per alta disponibilità
Garantisce HA dell'API Server Kubernetes
$KUBEVIPCMD manifest daemonset --interface eth0 --address 192.168.x.x --controlplane --services --arp --leaderElection

Source: Presentazione finale – Cluster Kubernetes RKE2 con Capsule, Ceph e OIDC (ICSC)

Speaker Notes

Includi Logo Kube-VIP + Schema VIP HA. Evidenzia failover testato.

Slide 7 of 8

Slide 7 - Risultati e Test

The "Risultati e Test" slide highlights test results with 1 active tenant confirming multi-tenancy success. All metrics show 100% performance in IAM access, tenant resource isolation, and controller failover high availability.

Risultati e Test

1: Active Tenants

Capsule multi-tenancy OK

100%: IAM Access Success

Differentiated user login

100%: Visibility Limited

Tenant resource isolation

100%: Failover Tested

Controller HA confirmed Source: Cluster Kubernetes RKE2 – Progetto ICSC

Speaker Notes

Cluster operativo: Tenants Capsule OK, Accesso IAM differenziato, Visibilità limitata, Failover testato. ```bash kubectl get tenants NAME STATE AGE tenant-test Active 1d ```

Slide 8 of 8

Slide 8 - Conclusioni

The slide highlights key achievements: a high-availability RKE2 cluster, dynamic Ceph-RBD storage, multi-tenancy via Capsule + OIDC, and scalable INFN infrastructure. It concludes that the project is ready for production.

Conclusioni

✅ Cluster RKE2 HA ✅ Storage Ceph-RBD dinamico ✅ Multi-tenancy Capsule + OIDC ✅ Infra scalabile INFN

Progetto pronto per produzione!

Source: Cluster Kubernetes RKE2 con Capsule, Ceph e OIDC (ICSC)

Speaker Notes

Closing message: Obiettivi raggiunti con successo! (4 words). Call-to-action: Contatta il team per demo e collaborazioni INFN. (7 words)

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