GKE k8sの雰囲気感を知る

GCP

$ gcloud services enable container.googleapis.com

$ gcloud config set project {プロジェクトID}

$ gcloud config set compute/zone asia-northeast1-a
Updated property [compute/zone].

$ gcloud config set compute/region asia-northeast1

Updated property [compute/region].

$ gcloud config configurations list

NAME: cloudshell-10043
IS_ACTIVE: True
ACCOUNT:
PROJECT: test-kanehiro
COMPUTE_DEFAULT_ZONE: asia-northeast1-a
COMPUTE_DEFAULT_REGION: asia-northeast1

クラスター作成

gcloud container clusters create hello-cluster --machine-type=e2-micro --num-nodes=2

Creating cluster hello-cluster in asia-northeast1-a... Cluster is being health-checked (master is healthy)...done.
Created [https://container.googleapis.com/v1/projects/test-kanehiro/zones/asia-northeast1-a/clusters/hello-cluster].
To inspect the contents of your cluster, go to: https://console.cloud.google.com/kubernetes/workload_/gcloud/asia-northeast1-a/hello-cluster?project=test-kanehiro
kubeconfig entry generated for hello-cluster.
NAME: hello-cluster
LOCATION: asia-northeast1-a
MASTER_VERSION: 1.23.12-gke.100
MASTER_IP: 35.200.73.36
MACHINE_TYPE: e2-micro
NODE_VERSION: 1.23.12-gke.100
NUM_NODES: 2
STATUS: RUNNING

クラスタの認証情報取得

$ gcloud container clusters get-credentials hello-cluster

Fetching cluster endpoint and auth data.
kubeconfig entry generated for hello-cluster.

$ vi deployment.yaml


apiVersion: apps/v1
kind: Deployment
metadata:
  labels:
    app: hello-server
  name: hello-server
spec:
  replicas: 1
  selector:
    matchLabels:
      app: hello-server
  template:
    metadata:
      labels:
        app: hello-server
    spec:
      containers:
      - image: us-docker.pkg.dev/google-samples/containers/gke/hello-app:1.0
        name: hello-server

$ kubectl apply -f ./deployment.yaml

deployment.apps/hello-server created

$ kubectl get pod
NAME                            READY   STATUS    RESTARTS   AGE
hello-server-69bf9bc479-wzgvp   1/1     Running   0          17s

$ kubectl get deployments,replicasets,pods --selector app=hello-server
NAME                           READY   UP-TO-DATE   AVAILABLE   AGE
deployment.apps/hello-server   1/1     1            1           77s

NAME                                      DESIRED   CURRENT   READY   AGE
replicaset.apps/hello-server-69bf9bc479   1         1         1       77s

NAME                                READY   STATUS    RESTARTS   AGE
pod/hello-server-69bf9bc479-wzgvp   1/1     Running   0          77s

replicasを1を2に変更

$ vi deployment.yaml


apiVersion: apps/v1
kind: Deployment
metadata:
  labels:
    app: hello-server
  name: hello-server
spec:
  replicas: 2
  selector:
    matchLabels:
      app: hello-server
  template:
    metadata:
      labels:
        app: hello-server
    spec:
      containers:
      - image: us-docker.pkg.dev/google-samples/containers/gke/hello-app:1.0
        name: hello-server

$ kubectl apply -f ./deployment.yaml
deployment.apps/hello-server configured

$ vi service.yaml

apiVersion: v1
kind: Service
metadata:
  name: hello-server
  labels:
    app: hello-server
spec:
  ports:
  - nodePort: 30934
    port: 80
    protocol: TCP
    targetPort: 8080
  selector:
    app: hello-server
  type: LoadBalancer
status:
  loadBalancer:
    ingress:
    - ip: 34.84.98.47

$ kubectl apply -f ./service.yaml

service/hello-server created

$ kubectl get deployments,replicasets,pods,service --selector app=hello-server
NAME READY UP-TO-DATE AVAILABLE AGE
deployment.apps/hello-server 2/2 2 2 5m17s

NAME DESIRED CURRENT READY AGE
replicaset.apps/hello-server-69bf9bc479 2 2 2 5m17s

NAME READY STATUS RESTARTS AGE
pod/hello-server-69bf9bc479-msw5g 1/1 Running 0 2m48s
pod/hello-server-69bf9bc479-wzgvp 1/1 Running 0 5m17s

NAME TYPE CLUSTER-IP EXTERNAL-IP PORT(S) AGE
service/hello-server LoadBalancer 10.120.4.146 34.84.71.80 80:30934/TCP 58s

アクセスする

http://34.84.71.80/

@see