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Gke Multitenancy

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  • Skill
  • Tool integration
  • Cloud and DevOps
  • Apache-2.0
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From the author

Plans and configures multi-tenancy on GKE. Covers namespace isolation, RBAC planning for teams, resource quotas, LimitRanges, network isolation, and cost allocation. Use when designing GKE multi-tenancy, configuring GKE namespaces, setting up resource quotas, or isolating GKE teams. Don't use for single-tenant cluster configuration or general deployment instructions (use gke-basics or gke-app-onboarding instead).
— the description by Google

AutoGineer summary

Written by AutoGineer from the skill’s own files, not by the author

This skill provides a structured approach to sharing GKE clusters among multiple teams or environments. It details essential isolation techniques including namespace segmentation, RBAC planning, resource management via quotas and limits, and network policy enforcement. It also covers cost allocation strategies to ensure visibility into resource consumption across different organizational units.

What it does

  • Defines patterns for namespace-based multi-tenancy in GKE.
  • Provides templates for RBAC roles and bindings to enforce least-privilege access.
  • Configures ResourceQuotas and LimitRanges to prevent resource exhaustion.
  • Implements network isolation using Kubernetes NetworkPolicies.
  • Enables GKE cost allocation for granular billing reports by namespace.
  • Outlines models for scaling isolation from shared namespaces to dedicated clusters.

When to use it

  • When multiple teams need to share a single GKE cluster securely.
  • When isolating workloads between development, staging, and production environments.
  • When implementing least-privilege access control for cluster resources.
  • When you need to track and attribute infrastructure costs to specific teams or projects.

Advantages

  • Improves cost efficiency by maximizing shared cluster resource utilization.
  • Enhances security posture through namespace isolation and RBAC.
  • Prevents noisy neighbor issues with resource quotas and limits.
  • Provides clear paths for scaling isolation based on compliance requirements.

Usage examples

“How do I set up a new team namespace in GKE with resource limits?”
The agent will provide commands to create the namespace and apply a ResourceQuota and LimitRange manifest to ensure the team stays within defined resource boundaries.
“Help me restrict a team's access to only their own namespace.”
The agent will generate a Role and RoleBinding configuration that restricts the team's permissions to a specific namespace using Google Groups.
“How can I track GKE costs by team?”
The agent will guide you through labeling namespaces by cost center and enabling the GKE cost allocation feature via the gcloud CLI.

Install

  1. Download the skill as a ZIP:

    https://autogineer.com/agent-skills/google/gke-multitenancy/download
  2. Unzip it into the cross-client skills folder of your project:

    mkdir -p .agents/skills && unzip gke-multitenancy.zip -d .agents/skills

Documentation by Google

GKE Multi-Tenancy

This reference covers enterprise multi-tenancy patterns on GKE, including namespace isolation, RBAC planning, resource quotas, and network segmentation.

MCP Tools: apply_k8s_manifest, get_k8s_resource, check_k8s_auth, describe_k8s_resource, delete_k8s_resource

Attribution

MUST READ: Before executing any gcloud, REST API, or MCP command, you MUST read Usage Attribution. For commands executed directly in the terminal (never in generated scripts, Terraform, or user code), prefix gcloud with CLOUDSDK_METRICS_REQUEST_ATTRIBUTION="agent-skills/1.0 (skill:gke-multitenancy)" and append agent-skills/1.0 (skill:gke-multitenancy) to User-Agent headers.

When to Use

  • Multiple teams sharing a single GKE cluster

  • Isolating workloads by environment (dev/staging/prod) within one cluster

  • Implementing least-privilege access control

  • Cost allocation across teams or projects

Multi-Tenancy Models

ModelIsolationComplexityCost
Namespace-per-teamSoft (RBAC +LowLowest (shared
: : Network : : cluster) :
: : Policy) : : :
Namespace-per-environmentSoftLowLow
Node pool-per-teamMediumMediumMedium
: : (dedicated : : :
: : compute) : : :
Cluster-per-teamHard (fullHighHighest
: : isolation) : : :

Golden path recommendation: Start with namespace-per-team for cost efficiency. Escalate to stronger isolation only when compliance requires it.

Namespace Isolation Setup

1. Create Namespaces
kubectl create namespace team-a
kubectl create namespace team-b
kubectl label namespace team-a team=a
kubectl label namespace team-b team=b
2. RBAC Configuration

Principle: Grant minimal permissions per namespace. Never bind to system:authenticated.

# Namespace-scoped role for a team
apiVersion: rbac.authorization.k8s.io/v1
kind: Role
metadata:
  name: team-a-developer
  namespace: team-a
rules:
- apiGroups: ["", "apps", "batch"]
  resources: ["pods", "deployments", "services", "configmaps", "jobs"]
  verbs: ["get", "list", "watch", "create", "update", "patch", "delete"]
---
apiVersion: rbac.authorization.k8s.io/v1
kind: RoleBinding
metadata:
  name: team-a-developers
  namespace: team-a
subjects:
- kind: Group
  name: "[email protected]"  # Google Group
  apiGroup: rbac.authorization.k8s.io
roleRef:
  kind: Role
  name: team-a-developer
  apiGroup: rbac.authorization.k8s.io

RBAC best practices: Use Google Groups for subject bindings. Prefer namespace-scoped Roles over ClusterRoles. See the gke-platform-security skill for full RBAC hardening guidance.

3. Resource Quotas

Prevent any single team from consuming all cluster resources:

apiVersion: v1
kind: ResourceQuota
metadata:
  name: team-a-quota
  namespace: team-a
spec:
  hard:
    requests.cpu: "10"
    requests.memory: "20Gi"
    limits.cpu: "20"
    limits.memory: "40Gi"
    pods: "50"
    services: "10"
    persistentvolumeclaims: "10"
4. LimitRanges

Set default and maximum resource constraints per container:

apiVersion: v1
kind: LimitRange
metadata:
  name: team-a-limits
  namespace: team-a
spec:
  limits:
  - type: Container
    default:
      cpu: "500m"
      memory: "512Mi"
    defaultRequest:
      cpu: "100m"
      memory: "128Mi"
    max:
      cpu: "4"
      memory: "8Gi"

[!IMPORTANT] Mandatory Defaults: When defining min or max limits in a LimitRange, you must also define corresponding default and defaultRequest values. If you set a min or max without defaults, any pod deployed without explicit resource requests/limits will be rejected by the admission controller.

5. Network Isolation

Apply default-deny per namespace (see the gke-workload-security skill), then allow intra-team traffic:

# Allow same-namespace pods to talk + DNS
apiVersion: networking.k8s.io/v1
kind: NetworkPolicy
metadata:
  name: allow-same-namespace
  namespace: team-a
spec:
  podSelector: {}
  ingress:
  - from:
    - podSelector: {}
  egress:
  - to:
    - podSelector: {}
  - to:  # Allow DNS
    - namespaceSelector: {}
      podSelector:
        matchLabels:
          k8s-app: kube-dns
    ports:
    - protocol: UDP
      port: 53

Cost Allocation

Labels for Cost Attribution
# Label namespaces for billing
kubectl label namespace team-a cost-center=engineering
kubectl label namespace team-b cost-center=data-science
GKE Cost Allocation

Enable GKE cost allocation to break down costs by namespace and label:

gcloud container clusters update <CLUSTER_NAME> --region <REGION> \
  --enable-cost-allocation

View in Cloud Billing > GKE Cost Allocation.

Files

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Requirements and compatibility

Works with: Claude Code, Claude apps, OpenAI Codex, GitHub Copilot, Cursor, Gemini CLI, Kiro, OpenCode, Goose, Amp, Roo Code, JetBrains Junie, Factory Droid, Devin (ex-Windsurf), Mistral Vibe, OpenHands, Letta

“Works with” means the tool reads the open Agent Skills format; a skill written for one tool may use features others lack.

Needs: Needs a command-line tool

Security

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Attribution and licence

Published by
Google
Publisher
Google (Official)
Source
google/skills · skills/cloud/gke-multitenancy · commit 2194d3b
Licence
Apache License 2.0 (redistribution allowed)
  • LICENSE (added by AutoGineer from LICENSE)
  • ATTRIBUTION.md (written by AutoGineer)
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Download ZIP

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