AKS へのワークロードのデプロイ

Azure Kubernetes Service とは

AKS クラスターの作成

# Create an AKS cluster with 3 nodes
az aks create \
  --name myAKSCluster \
  --resource-group MyRG \
  --location eastus \
  --node-count 3 \
  --node-vm-size Standard_D2s_v3 \
  --enable-managed-identity \
  --attach-acr mycontainerregistry \
  --network-plugin azure \
  --generate-ssh-keys

# Get kubectl credentials
az aks get-credentials --name myAKSCluster --resource-group MyRG

ノードプール

# Add a GPU node pool for ML workloads
az aks nodepool add \
  --cluster-name myAKSCluster \
  --resource-group MyRG \
  --name gpupool \
  --node-count 2 \
  --node-vm-size Standard_NC6s_v3 \
  --node-taints sku=gpu:NoSchedule

# List node pools
az aks nodepool list \
  --cluster-name myAKSCluster \
  --resource-group MyRG \
  -o table

マルチコンテナーアプリケーションのデプロイ

# Apply all manifests in a directory
kubectl apply -f k8s/

# Or apply individual files
kubectl apply -f frontend-deployment.yaml
kubectl apply -f frontend-service.yaml
kubectl apply -f api-deployment.yaml
kubectl apply -f api-service.yaml
kubectl apply -f ingress.yaml

# Watch rollout status
kubectl rollout status deployment/frontend
kubectl rollout status deployment/api

Ingress と Application Gateway

# Ingress routing traffic to two services by path
apiVersion: networking.k8s.io/v1
kind: Ingress
metadata:
  name: myapp-ingress
  annotations:
    nginx.ingress.kubernetes.io/rewrite-target: /
spec:
  ingressClassName: nginx
  tls:
  - hosts: [myapp.contoso.com]
    secretName: myapp-tls
  rules:
  - host: myapp.contoso.com
    http:
      paths:
      - path: /api
        pathType: Prefix
        backend:
          service: {name: api-svc, port: {number: 80}}
      - path: /
        pathType: Prefix
        backend:
          service: {name: frontend-svc, port: {number: 80}}

アプリケーションのパッケージ化に Helm Charts を使用する

# Add the NGINX Ingress Controller chart repo
helm repo add ingress-nginx https://kubernetes.github.io/ingress-nginx
helm repo update

# Install NGINX Ingress Controller
helm install ingress-nginx ingress-nginx/ingress-nginx \
  --namespace ingress-nginx \
  --create-namespace \
  --set controller.replicaCount=2

# Install your own app chart with custom values
helm install myapp ./charts/myapp -f values-prod.yaml

ローリングアップデートとロールバック

# Update the image to a new version
kubectl set image deployment/myapp \
  myapp=mycontainerregistry.azurecr.io/myapp:v2.0

# Watch the rollout progress
kubectl rollout status deployment/myapp

# View rollout history
kubectl rollout history deployment/myapp

# Rollback to the previous version
kubectl rollout undo deployment/myapp

# Rollback to a specific revision
kubectl rollout undo deployment/myapp --to-revision=2

クラスターオートスケーラー

# Enable Cluster Autoscaler on the default node pool
az aks update \
  --name myAKSCluster \
  --resource-group MyRG \
  --enable-cluster-autoscaler \
  --min-count 2 \
  --max-count 10

# Update autoscaler bounds on a specific node pool
az aks nodepool update \
  --cluster-name myAKSCluster \
  --resource-group MyRG \
  --name nodepool1 \
  --enable-cluster-autoscaler \
  --min-count 3 \
  --max-count 20

Azure Monitor による AKS の監視

# Enable Azure Monitor Container Insights on AKS
az aks enable-addons \
  --addons monitoring \
  --name myAKSCluster \
  --resource-group MyRG \
  --workspace-resource-id /subscriptions/.../workspaces/MyLogAnalytics

# Stream live logs from a running pod
kubectl logs -f deployment/myapp -c myapp

# Query pod resource usage
kubectl top pods --namespace default

AKS RBAC と Azure Active Directory

# Enable Entra ID RBAC on an AKS cluster
az aks update \
  --name myAKSCluster \
  --resource-group MyRG \
  --enable-azure-rbac

# Assign a built-in AKS role to an Entra group
az role assignment create \
  --role 'Azure Kubernetes Service RBAC Reader' \
  --assignee '<Entra-Group-Object-ID>' \
  --scope /subscriptions/.../resourceGroups/MyRG/providers/Microsoft.ContainerService/managedClusters/myAKSCluster

ポッドレベルのセキュリティにネットワークポリシーを使用する

# Default deny all ingress to pods in namespace
apiVersion: networking.k8s.io/v1
kind: NetworkPolicy
metadata:
  name: default-deny-ingress
  namespace: production
spec:
  podSelector: {}  # Matches all pods
  policyTypes:
  - Ingress

# Allow API pods to receive from frontend pods only
apiVersion: networking.k8s.io/v1
kind: NetworkPolicy
metadata:
  name: api-allow-frontend
spec:
  podSelector: {matchLabels: {app: api}}
  ingress:
  - from:
    - podSelector: {matchLabels: {app: frontend}}

理解度チェック

レッスンのまとめ