K8S Manifests

Kubernetes / OpenShift Manifest Generator

Current Versions & CLI Documentation (January 2026)

CLI Installation Quick Reference

# kubectl (latest stable)
curl -LO "https://dl.k8s.io/release/$(curl -L -s https://dl.k8s.io/release/stable.txt)/bin/$(uname -s | tr '[:upper:]' '[:lower:]')/amd64/kubectl"
chmod +x kubectl && sudo mv kubectl /usr/local/bin/
# OR
brew install kubectl

# oc (OpenShift CLI) - download from mirror.openshift.com or:
brew install openshift-cli

# eksctl (AWS EKS)
brew install eksctl
# OR
curl -sLO "https://github.com/eksctl-io/eksctl/releases/latest/download/eksctl_$(uname -s)_amd64.tar.gz"

# Azure CLI + AKS
brew install azure-cli
az extension add --name aks-preview

# Google Cloud SDK + GKE
brew install google-cloud-sdk
gcloud components install gke-gcloud-auth-plugin

# ROSA CLI
rosa download cli

Command Usage Convention

IMPORTANT: This skill uses kubectl as the primary command in all examples. When working with:

• OpenShift/ARO clusters: Replace all kubectl commands with oc
• Standard Kubernetes clusters (AKS, EKS, GKE, etc.): Use kubectl as shown

The agent will automatically detect the cluster type and use the appropriate command.

Generate production-ready YAML manifests following security best practices and operational excellence.

Core Principles

1. Security by Default: Always include security contexts, never run as root unless explicitly required
2. Resource Management: Always specify resource requests/limits
3. High Availability: Default to multiple replicas with anti-affinity for production
4. Observability: Include health probes, annotations for monitoring
5. GitOps Ready: Generate manifests suitable for version control and GitOps workflows

Manifest Generation Workflow

1. Identify resource type and target platform (K8s vanilla, OCP, EKS, GKE, AKS)
2. Gather requirements (replicas, resources, networking, storage)
3. Apply security best practices
4. Generate YAML with appropriate labels and annotations
5. Validate against best practices checklist

Resource Templates

Deployment (Production-Ready)

apiVersion: apps/v1
kind: Deployment
metadata:
  name: ${APP_NAME}
  namespace: ${NAMESPACE}
  labels:
    app.kubernetes.io/name: ${APP_NAME}
    app.kubernetes.io/instance: ${INSTANCE}
    app.kubernetes.io/version: "${VERSION}"
    app.kubernetes.io/component: ${COMPONENT}
    app.kubernetes.io/part-of: ${PART_OF}
    app.kubernetes.io/managed-by: cluster-code
  annotations:
    description: "${DESCRIPTION}"
spec:
  replicas: ${REPLICAS:-3}
  revisionHistoryLimit: 5
  strategy:
    type: RollingUpdate
    rollingUpdate:
      maxSurge: 1
      maxUnavailable: 0
  selector:
    matchLabels:
      app.kubernetes.io/name: ${APP_NAME}
      app.kubernetes.io/instance: ${INSTANCE}
  template:
    metadata:
      labels:
        app.kubernetes.io/name: ${APP_NAME}
        app.kubernetes.io/instance: ${INSTANCE}
      annotations:
        prometheus.io/scrape: "true"
        prometheus.io/port: "${METRICS_PORT:-8080}"
        prometheus.io/path: "/metrics"
    spec:
      serviceAccountName: ${SERVICE_ACCOUNT:-default}
      securityContext:
        runAsNonRoot: true
        runAsUser: 1000
        runAsGroup: 1000
        fsGroup: 1000
        seccompProfile:
          type: RuntimeDefault
      affinity:
        podAntiAffinity:
          preferredDuringSchedulingIgnoredDuringExecution:
            - weight: 100
              podAffinityTerm:
                labelSelector:
                  matchLabels:
                    app.kubernetes.io/name: ${APP_NAME}
                topologyKey: kubernetes.io/hostname
      topologySpreadConstraints:
        - maxSkew: 1
          topologyKey: topology.kubernetes.io/zone
          whenUnsatisfiable: ScheduleAnyway
          labelSelector:
            matchLabels:
              app.kubernetes.io/name: ${APP_NAME}
      containers:
        - name: ${APP_NAME}
          image: ${IMAGE}:${TAG}
          imagePullPolicy: IfNotPresent
          securityContext:
            allowPrivilegeEscalation: false
            readOnlyRootFilesystem: true
            capabilities:
              drop:
                - ALL
          ports:
            - name: http
              containerPort: ${PORT:-8080}
              protocol: TCP
          env:
            - name: POD_NAME
              valueFrom:
                fieldRef:
                  fieldPath: metadata.name
            - name: POD_NAMESPACE
              valueFrom:
                fieldRef:
                  fieldPath: metadata.namespace
          envFrom:
            - configMapRef:
                name: ${APP_NAME}-config
                optional: true
            - secretRef:
                name: ${APP_NAME}-secrets
                optional: true
          resources:
            requests:
              cpu: ${CPU_REQUEST:-100m}
              memory: ${MEMORY_REQUEST:-128Mi}
            limits:
              cpu: ${CPU_LIMIT:-500m}
              memory: ${MEMORY_LIMIT:-512Mi}
          livenessProbe:
            httpGet:
              path: /healthz
              port: http
            initialDelaySeconds: 15
            periodSeconds: 10
            timeoutSeconds: 5
            failureThreshold: 3
          readinessProbe:
            httpGet:
              path: /ready
              port: http
            initialDelaySeconds: 5
            periodSeconds: 5
            timeoutSeconds: 3
            failureThreshold: 3
          startupProbe:
            httpGet:
              path: /healthz
              port: http
            initialDelaySeconds: 10
            periodSeconds: 5
            failureThreshold: 30
          volumeMounts:
            - name: tmp
              mountPath: /tmp
            - name: cache
              mountPath: /var/cache
      volumes:
        - name: tmp
          emptyDir: {}
        - name: cache
          emptyDir: {}
      terminationGracePeriodSeconds: 30

Service

apiVersion: v1
kind: Service
metadata:
  name: ${APP_NAME}
  namespace: ${NAMESPACE}
  labels:
    app.kubernetes.io/name: ${APP_NAME}
    app.kubernetes.io/managed-by: cluster-code
spec:
  type: ${SERVICE_TYPE:-ClusterIP}
  ports:
    - name: http
      port: ${SERVICE_PORT:-80}
      targetPort: http
      protocol: TCP
  selector:
    app.kubernetes.io/name: ${APP_NAME}
    app.kubernetes.io/instance: ${INSTANCE}

Ingress (K8s)

apiVersion: networking.k8s.io/v1
kind: Ingress
metadata:
  name: ${APP_NAME}
  namespace: ${NAMESPACE}
  labels:
    app.kubernetes.io/name: ${APP_NAME}
    app.kubernetes.io/managed-by: cluster-code
  annotations:
    nginx.ingress.kubernetes.io/ssl-redirect: "true"
    nginx.ingress.kubernetes.io/proxy-body-size: "10m"
    cert-manager.io/cluster-issuer: ${CLUSTER_ISSUER:-letsencrypt-prod}
spec:
  ingressClassName: ${INGRESS_CLASS:-nginx}
  tls:
    - hosts:
        - ${HOST}
      secretName: ${APP_NAME}-tls
  rules:
    - host: ${HOST}
      http:
        paths:
          - path: /
            pathType: Prefix
            backend:
              service:
                name: ${APP_NAME}
                port:
                  name: http

OpenShift Route

apiVersion: route.openshift.io/v1
kind: Route
metadata:
  name: ${APP_NAME}
  namespace: ${NAMESPACE}
  labels:
    app.kubernetes.io/name: ${APP_NAME}
    app.kubernetes.io/managed-by: cluster-code
  annotations:
    haproxy.router.openshift.io/timeout: 60s
spec:
  host: ${HOST}
  to:
    kind: Service
    name: ${APP_NAME}
    weight: 100
  port:
    targetPort: http
  tls:
    termination: edge
    insecureEdgeTerminationPolicy: Redirect
  wildcardPolicy: None

ConfigMap

apiVersion: v1
kind: ConfigMap
metadata:
  name: ${APP_NAME}-config
  namespace: ${NAMESPACE}
  labels:
    app.kubernetes.io/name: ${APP_NAME}
    app.kubernetes.io/managed-by: cluster-code
data:
  # Application configuration
  APP_ENV: "${ENVIRONMENT:-production}"
  LOG_LEVEL: "${LOG_LEVEL:-info}"
  # Add application-specific config here

Secret (Template - values should be base64 encoded or use stringData)

apiVersion: v1
kind: Secret
metadata:
  name: ${APP_NAME}-secrets
  namespace: ${NAMESPACE}
  labels:
    app.kubernetes.io/name: ${APP_NAME}
    app.kubernetes.io/managed-by: cluster-code
type: Opaque
stringData:
  # Use stringData for plain text (auto-encoded)
  # Use data: for pre-encoded base64 values
  DATABASE_URL: "${DATABASE_URL}"

PersistentVolumeClaim

apiVersion: v1
kind: PersistentVolumeClaim
metadata:
  name: ${APP_NAME}-data
  namespace: ${NAMESPACE}
  labels:
    app.kubernetes.io/name: ${APP_NAME}
    app.kubernetes.io/managed-by: cluster-code
spec:
  accessModes:
    - ${ACCESS_MODE:-ReadWriteOnce}
  storageClassName: ${STORAGE_CLASS:-standard}
  resources:
    requests:
      storage: ${STORAGE_SIZE:-10Gi}

StatefulSet

apiVersion: apps/v1
kind: StatefulSet
metadata:
  name: ${APP_NAME}
  namespace: ${NAMESPACE}
  labels:
    app.kubernetes.io/name: ${APP_NAME}
    app.kubernetes.io/managed-by: cluster-code
spec:
  serviceName: ${APP_NAME}-headless
  replicas: ${REPLICAS:-3}
  podManagementPolicy: Parallel
  updateStrategy:
    type: RollingUpdate
  selector:
    matchLabels:
      app.kubernetes.io/name: ${APP_NAME}
  template:
    metadata:
      labels:
        app.kubernetes.io/name: ${APP_NAME}
    spec:
      securityContext:
        runAsNonRoot: true
        runAsUser: 1000
        fsGroup: 1000
        seccompProfile:
          type: RuntimeDefault
      containers:
        - name: ${APP_NAME}
          image: ${IMAGE}:${TAG}
          securityContext:
            allowPrivilegeEscalation: false
            readOnlyRootFilesystem: true
            capabilities:
              drop:
                - ALL
          ports:
            - name: http
              containerPort: ${PORT:-8080}
          resources:
            requests:
              cpu: ${CPU_REQUEST:-100m}
              memory: ${MEMORY_REQUEST:-256Mi}
            limits:
              cpu: ${CPU_LIMIT:-1000m}
              memory: ${MEMORY_LIMIT:-1Gi}
          volumeMounts:
            - name: data
              mountPath: /data
  volumeClaimTemplates:
    - metadata:
        name: data
      spec:
        accessModes:
          - ReadWriteOnce
        storageClassName: ${STORAGE_CLASS:-standard}
        resources:
          requests:
            storage: ${STORAGE_SIZE:-10Gi}

NetworkPolicy

apiVersion: networking.k8s.io/v1
kind: NetworkPolicy
metadata:
  name: ${APP_NAME}-netpol
  namespace: ${NAMESPACE}
  labels:
    app.kubernetes.io/name: ${APP_NAME}
    app.kubernetes.io/managed-by: cluster-code
spec:
  podSelector:
    matchLabels:
      app.kubernetes.io/name: ${APP_NAME}
  policyTypes:
    - Ingress
    - Egress
  ingress:
    - from:
        - namespaceSelector:
            matchLabels:
              kubernetes.io/metadata.name: ${INGRESS_NAMESPACE:-ingress-nginx}
        - podSelector:
            matchLabels:
              app.kubernetes.io/name: ${ALLOWED_APP}
      ports:
        - protocol: TCP
          port: ${PORT:-8080}
  egress:
    - to:
        - namespaceSelector: {}
      ports:
        - protocol: UDP
          port: 53
    - to:
        - podSelector:
            matchLabels:
              app.kubernetes.io/name: ${EGRESS_TARGET}
      ports:
        - protocol: TCP
          port: ${EGRESS_PORT}

HorizontalPodAutoscaler

apiVersion: autoscaling/v2
kind: HorizontalPodAutoscaler
metadata:
  name: ${APP_NAME}
  namespace: ${NAMESPACE}
  labels:
    app.kubernetes.io/name: ${APP_NAME}
    app.kubernetes.io/managed-by: cluster-code
spec:
  scaleTargetRef:
    apiVersion: apps/v1
    kind: Deployment
    name: ${APP_NAME}
  minReplicas: ${MIN_REPLICAS:-2}
  maxReplicas: ${MAX_REPLICAS:-10}
  metrics:
    - type: Resource
      resource:
        name: cpu
        target:
          type: Utilization
          averageUtilization: ${CPU_TARGET:-70}
    - type: Resource
      resource:
        name: memory
        target:
          type: Utilization
          averageUtilization: ${MEMORY_TARGET:-80}
  behavior:
    scaleDown:
      stabilizationWindowSeconds: 300
      policies:
        - type: Percent
          value: 10
          periodSeconds: 60
    scaleUp:
      stabilizationWindowSeconds: 0
      policies:
        - type: Percent
          value: 100
          periodSeconds: 15
        - type: Pods
          value: 4
          periodSeconds: 15
      selectPolicy: Max

ServiceAccount with RBAC

apiVersion: v1
kind: ServiceAccount
metadata:
  name: ${APP_NAME}
  namespace: ${NAMESPACE}
  labels:
    app.kubernetes.io/name: ${APP_NAME}
    app.kubernetes.io/managed-by: cluster-code
automountServiceAccountToken: false
---
apiVersion: rbac.authorization.k8s.io/v1
kind: Role
metadata:
  name: ${APP_NAME}
  namespace: ${NAMESPACE}
  labels:
    app.kubernetes.io/name: ${APP_NAME}
    app.kubernetes.io/managed-by: cluster-code
rules:
  - apiGroups: [""]
    resources: ["configmaps", "secrets"]
    verbs: ["get", "list", "watch"]
  - apiGroups: [""]
    resources: ["pods"]
    verbs: ["get", "list"]
---
apiVersion: rbac.authorization.k8s.io/v1
kind: RoleBinding
metadata:
  name: ${APP_NAME}
  namespace: ${NAMESPACE}
  labels:
    app.kubernetes.io/name: ${APP_NAME}
    app.kubernetes.io/managed-by: cluster-code
roleRef:
  apiGroup: rbac.authorization.k8s.io
  kind: Role
  name: ${APP_NAME}
subjects:
  - kind: ServiceAccount
    name: ${APP_NAME}
    namespace: ${NAMESPACE}

CronJob

apiVersion: batch/v1
kind: CronJob
metadata:
  name: ${JOB_NAME}
  namespace: ${NAMESPACE}
  labels:
    app.kubernetes.io/name: ${JOB_NAME}
    app.kubernetes.io/managed-by: cluster-code
spec:
  schedule: "${SCHEDULE}"
  concurrencyPolicy: ${CONCURRENCY:-Forbid}
  successfulJobsHistoryLimit: 3
  failedJobsHistoryLimit: 3
  startingDeadlineSeconds: 300
  jobTemplate:
    spec:
      backoffLimit: 3
      activeDeadlineSeconds: ${TIMEOUT:-3600}
      template:
        spec:
          securityContext:
            runAsNonRoot: true
            runAsUser: 1000
            seccompProfile:
              type: RuntimeDefault
          restartPolicy: OnFailure
          containers:
            - name: ${JOB_NAME}
              image: ${IMAGE}:${TAG}
              securityContext:
                allowPrivilegeEscalation: false
                readOnlyRootFilesystem: true
                capabilities:
                  drop:
                    - ALL
              resources:
                requests:
                  cpu: ${CPU_REQUEST:-100m}
                  memory: ${MEMORY_REQUEST:-128Mi}
                limits:
                  cpu: ${CPU_LIMIT:-500m}
                  memory: ${MEMORY_LIMIT:-512Mi}
              command: ${COMMAND}
              args: ${ARGS}

PodDisruptionBudget

apiVersion: policy/v1
kind: PodDisruptionBudget
metadata:
  name: ${APP_NAME}
  namespace: ${NAMESPACE}
  labels:
    app.kubernetes.io/name: ${APP_NAME}
    app.kubernetes.io/managed-by: cluster-code
spec:
  minAvailable: ${MIN_AVAILABLE:-1}
  # OR use maxUnavailable: ${MAX_UNAVAILABLE:-1}
  selector:
    matchLabels:
      app.kubernetes.io/name: ${APP_NAME}

OpenShift-Specific Resources

SecurityContextConstraints (Cluster-Admin)

apiVersion: security.openshift.io/v1
kind: SecurityContextConstraints
metadata:
  name: ${SCC_NAME}
  labels:
    app.kubernetes.io/managed-by: cluster-code
allowHostDirVolumePlugin: false
allowHostIPC: false
allowHostNetwork: false
allowHostPID: false
allowHostPorts: false
allowPrivilegeEscalation: false
allowPrivilegedContainer: false
allowedCapabilities: null
defaultAddCapabilities: null
fsGroup:
  type: MustRunAs
  ranges:
    - min: 1000
      max: 65534
priority: null
readOnlyRootFilesystem: true
requiredDropCapabilities:
  - ALL
runAsUser:
  type: MustRunAsRange
  uidRangeMin: 1000
  uidRangeMax: 65534
seLinuxContext:
  type: MustRunAs
supplementalGroups:
  type: MustRunAs
  ranges:
    - min: 1000
      max: 65534
users: []
groups: []
volumes:
  - configMap
  - downwardAPI
  - emptyDir
  - persistentVolumeClaim
  - projected
  - secret

BuildConfig (S2I)

apiVersion: build.openshift.io/v1
kind: BuildConfig
metadata:
  name: ${APP_NAME}
  namespace: ${NAMESPACE}
  labels:
    app.kubernetes.io/name: ${APP_NAME}
    app.kubernetes.io/managed-by: cluster-code
spec:
  source:
    type: Git
    git:
      uri: ${GIT_URI}
      ref: ${GIT_REF:-main}
    contextDir: ${CONTEXT_DIR:-/}
  strategy:
    type: Source
    sourceStrategy:
      from:
        kind: ImageStreamTag
        namespace: openshift
        name: ${BUILDER_IMAGE:-python:3.11-ubi8}
      env:
        - name: APP_ENV
          value: ${ENVIRONMENT:-production}
  output:
    to:
      kind: ImageStreamTag
      name: ${APP_NAME}:latest
  triggers:
    - type: ConfigChange
    - type: ImageChange
    - type: GitHub
      github:
        secret: ${WEBHOOK_SECRET}
  resources:
    limits:
      cpu: "1"
      memory: 2Gi
    requests:
      cpu: 500m
      memory: 1Gi

ImageStream

apiVersion: image.openshift.io/v1
kind: ImageStream
metadata:
  name: ${APP_NAME}
  namespace: ${NAMESPACE}
  labels:
    app.kubernetes.io/name: ${APP_NAME}
    app.kubernetes.io/managed-by: cluster-code
spec:
  lookupPolicy:
    local: true
  tags:
    - name: latest
      annotations:
        description: Latest build of ${APP_NAME}

Best Practices Checklist

Before finalizing any manifest, verify:

Security

• runAsNonRoot: true in securityContext
• allowPrivilegeEscalation: false
• readOnlyRootFilesystem: true (with emptyDir for temp/cache)
• capabilities.drop: [ALL]
• seccompProfile.type: RuntimeDefault
• ServiceAccount with minimal RBAC permissions
• NetworkPolicy restricting ingress/egress
• Secrets not hardcoded, using Secret resources or external secrets operator

Reliability

• Resource requests AND limits defined
• Liveness, readiness, and startup probes configured
• PodDisruptionBudget for HA workloads
• Anti-affinity rules for multi-replica deployments
• TopologySpreadConstraints for zone distribution

Operations

• Standard Kubernetes labels (app.kubernetes.io/*)
• Prometheus annotations for metrics scraping
• Appropriate terminationGracePeriodSeconds
• RevisionHistoryLimit set (default 5)
• RollingUpdate strategy with maxSurge/maxUnavailable

Observability

• Logging to stdout/stderr
• Metrics endpoint exposed
• Health check endpoints (/healthz, /ready)
• Resource annotations for monitoring dashboards

Common Patterns

Sidecar Container Pattern

Add sidecars for logging, monitoring, or service mesh:

containers:
  - name: app
    # main application
  - name: sidecar
    image: sidecar-image
    resources:
      requests:
        cpu: 10m
        memory: 32Mi
      limits:
        cpu: 50m
        memory: 64Mi

Init Container Pattern

For initialization, migrations, or waiting on dependencies:

initContainers:
  - name: wait-for-db
    image: busybox
    command: ['sh', '-c', 'until nc -z ${DB_HOST} 5432; do sleep 2; done']
  - name: migrations
    image: ${IMAGE}:${TAG}
    command: ['./migrate.sh']

External Secrets Pattern

For HashiCorp Vault, AWS Secrets Manager, etc.:

apiVersion: external-secrets.io/v1beta1
kind: ExternalSecret
metadata:
  name: ${APP_NAME}-secrets
spec:
  refreshInterval: 1h
  secretStoreRef:
    name: vault-backend
    kind: ClusterSecretStore
  target:
    name: ${APP_NAME}-secrets
  data:
    - secretKey: DATABASE_URL
      remoteRef:
        key: ${VAULT_PATH}
        property: database_url

Platform-Specific Notes

EKS (AWS) - v1.31

CLI Commands:

# Create cluster with eksctl
eksctl create cluster --name ${CLUSTER} --region ${REGION} \
  --version 1.31 --nodegroup-name standard \
  --node-type m6i.large --nodes 3 --nodes-min 1 --nodes-max 5 \
  --managed --spot

# Get kubeconfig
aws eks update-kubeconfig --name ${CLUSTER} --region ${REGION}

# Check add-ons
aws eks list-addons --cluster-name ${CLUSTER}

# Install EKS Pod Identity (replaces IRSA in 1.31+)
eksctl create podidentityassociation --cluster ${CLUSTER} \
  --namespace ${NS} --service-account-name ${SA} \
  --role-arn arn:aws:iam::${ACCOUNT}:role/${ROLE}

Key Features (1.31):

• EKS Pod Identity (simplified IAM for pods, replaces IRSA complexity)
• EKS Auto Mode (automatic node management)
• EBS CSI driver for gp3 volumes (default)
• AWS Load Balancer Controller v2.9+ for ALB/NLB
• Karpenter v1.0+ for autoscaling

Manifest Annotations:

# ALB Ingress (AWS Load Balancer Controller)
apiVersion: networking.k8s.io/v1
kind: Ingress
metadata:
  annotations:
    kubernetes.io/ingress.class: alb
    alb.ingress.kubernetes.io/scheme: internet-facing
    alb.ingress.kubernetes.io/target-type: ip
    alb.ingress.kubernetes.io/listen-ports: '[{"HTTPS":443}]'
    alb.ingress.kubernetes.io/ssl-policy: ELBSecurityPolicy-TLS13-1-2-2021-06
    alb.ingress.kubernetes.io/certificate-arn: ${ACM_CERT_ARN}
    alb.ingress.kubernetes.io/healthcheck-path: /healthz
    alb.ingress.kubernetes.io/wafv2-acl-arn: ${WAF_ARN}  # Optional WAF

# NLB Service
apiVersion: v1
kind: Service
metadata:
  annotations:
    service.beta.kubernetes.io/aws-load-balancer-type: nlb
    service.beta.kubernetes.io/aws-load-balancer-scheme: internet-facing
    service.beta.kubernetes.io/aws-load-balancer-nlb-target-type: ip
    service.beta.kubernetes.io/aws-load-balancer-cross-zone-load-balancing-enabled: "true"

GKE (Google Cloud) - v1.31

CLI Commands:

# Create Autopilot cluster (recommended)
gcloud container clusters create-auto ${CLUSTER} \
  --region ${REGION} \
  --release-channel regular

# Create Standard cluster
gcloud container clusters create ${CLUSTER} \
  --region ${REGION} \
  --num-nodes 3 \
  --machine-type e2-standard-4 \
  --enable-autoscaling --min-nodes 1 --max-nodes 10 \
  --workload-pool=${PROJECT}.svc.id.goog \
  --enable-dataplane-v2  # Cilium-based networking

# Get credentials
gcloud container clusters get-credentials ${CLUSTER} --region ${REGION}

# Check GKE version
gcloud container get-server-config --region ${REGION}

Key Features (1.31):

• Autopilot mode (fully managed nodes)
• GKE Dataplane V2 (Cilium-based eBPF networking)
• Workload Identity Federation (replaces node SA)
• Gateway API support (standard)
• Config Connector for GCP resource management

Manifest Annotations:

# GCE Ingress with Google-managed cert
apiVersion: networking.k8s.io/v1
kind: Ingress
metadata:
  annotations:
    kubernetes.io/ingress.class: gce
    kubernetes.io/ingress.global-static-ip-name: ${STATIC_IP}
    networking.gke.io/managed-certificates: ${MANAGED_CERT}
    networking.gke.io/v1beta1.FrontendConfig: ${FRONTEND_CONFIG}

# NEG for container-native load balancing (recommended)
apiVersion: v1
kind: Service
metadata:
  annotations:
    cloud.google.com/neg: '{"ingress": true}'
    cloud.google.com/backend-config: '{"default": "${BACKEND_CONFIG}"}'

AKS (Azure) - v1.31

CLI Commands:

# Create AKS cluster
az aks create --resource-group ${RG} --name ${CLUSTER} \
  --kubernetes-version 1.31 \
  --node-count 3 --node-vm-size Standard_D4s_v5 \
  --enable-managed-identity \
  --enable-workload-identity \
  --enable-oidc-issuer \
  --network-plugin azure \
  --network-plugin-mode overlay \
  --network-dataplane cilium \
  --enable-addons monitoring

# Get credentials
az aks get-credentials --resource-group ${RG} --name ${CLUSTER}

# Check cluster
az aks show --resource-group ${RG} --name ${CLUSTER}

# Enable addons
az aks enable-addons --addons azure-keyvault-secrets-provider \
  --resource-group ${RG} --name ${CLUSTER}

Key Features (1.31):

• Azure CNI Overlay with Cilium (eBPF networking)
• Workload Identity (Azure AD pod identity replacement)
• KEDA add-on (event-driven autoscaling)
• Azure Key Vault Secrets Provider (CSI driver)
• Automatic image cleaner and node autoprovision

Manifest Annotations:

# Azure Application Gateway Ingress
apiVersion: networking.k8s.io/v1
kind: Ingress
metadata:
  annotations:
    kubernetes.io/ingress.class: azure/application-gateway
    appgw.ingress.kubernetes.io/ssl-redirect: "true"
    appgw.ingress.kubernetes.io/use-private-ip: "false"
    appgw.ingress.kubernetes.io/backend-path-prefix: "/"
    appgw.ingress.kubernetes.io/waf-policy-for-path: ${WAF_POLICY_ID}

# Azure Internal Load Balancer
apiVersion: v1
kind: Service
metadata:
  annotations:
    service.beta.kubernetes.io/azure-load-balancer-internal: "true"
    service.beta.kubernetes.io/azure-load-balancer-internal-subnet: ${SUBNET}
    service.beta.kubernetes.io/azure-pls-create: "true"  # Private Link

OpenShift / ARO / ROSA - v4.17

CLI Commands:

# OpenShift CLI basics
oc login ${API_URL} --token=${TOKEN}
oc project ${NAMESPACE}
oc new-project ${PROJECT}

# ARO (Azure Red Hat OpenShift)
az aro create --resource-group ${RG} --name ${CLUSTER} \
  --vnet ${VNET} --master-subnet ${MASTER_SUBNET} \
  --worker-subnet ${WORKER_SUBNET} \
  --pull-secret @pull-secret.txt

az aro show --resource-group ${RG} --name ${CLUSTER} --query consoleProfile.url
az aro list-credentials --resource-group ${RG} --name ${CLUSTER}

# ROSA (Red Hat OpenShift on AWS)
rosa create cluster --cluster-name ${CLUSTER} \
  --region ${REGION} \
  --sts --mode auto \
  --hosted-cp  # Hosted control plane (HCP) for faster provisioning

rosa describe cluster --cluster ${CLUSTER}
rosa create admin --cluster ${CLUSTER}

Key Features (4.17):

• OVN-Kubernetes (default CNI with eBPF)
• ROSA with Hosted Control Planes (HCP)
• SecurityContextConstraints (SCC) with Pod Security Admission
• OpenShift GitOps (ArgoCD) and Pipelines (Tekton) operators
• Service Mesh 3.0 (Istio-based)
• OpenShift AI (machine learning platform)

OpenShift-specific Resources:

# Route (instead of Ingress)
apiVersion: route.openshift.io/v1
kind: Route
metadata:
  name: ${APP_NAME}
  annotations:
    haproxy.router.openshift.io/timeout: 60s
    haproxy.router.openshift.io/rate-limit-connections: "true"
    haproxy.router.openshift.io/rate-limit-connections.rate-http: "100"
spec:
  host: ${HOST}
  to:
    kind: Service
    name: ${APP_NAME}
  port:
    targetPort: http
  tls:
    termination: edge
    insecureEdgeTerminationPolicy: Redirect
    certificate: |
      ${CERT}
    key: |
      ${KEY}