Minikube : 基本操作2020/08/07 |
Minikube で構成した シングルノード Kubernetes クラスターでの Pod 作成等の基本操作です。
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[1] | Pod の作成/削除等の操作です。 |
# [test-nginx] pod を起動する [cent@dlp ~]$ kubectl create deployment test-nginx --image=nginx deployment.apps/test-nginx created kubectl get pods NAME READY STATUS RESTARTS AGE test-nginx-7b7d9954bd-89rkq 1/1 Running 0 9s # [test-nginx] pod の環境変数を表示する [cent@dlp ~]$ kubectl exec test-nginx-7b7d9954bd-89rkq -- env PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin HOSTNAME=test-nginx-7b7d9954bd-89rkq KUBERNETES_PORT_443_TCP_PROTO=tcp KUBERNETES_PORT_443_TCP_PORT=443 KUBERNETES_PORT_443_TCP_ADDR=10.96.0.1 KUBERNETES_SERVICE_HOST=10.96.0.1 KUBERNETES_SERVICE_PORT=443 KUBERNETES_SERVICE_PORT_HTTPS=443 KUBERNETES_PORT=tcp://10.96.0.1:443 KUBERNETES_PORT_443_TCP=tcp://10.96.0.1:443 NGINX_VERSION=1.19.1 NJS_VERSION=0.4.2 PKG_RELEASE=1~buster HOME=/root # [test-nginx] pod にシェルアクセス [cent@dlp ~]$ kubectl exec -it test-nginx-7b7d9954bd-89rkq -- bash
hostname test-nginx-7b7d9954bd-89rkq
root@test-nginx-7b7d9954bd-89rkq:/#
exit
# [test-nginx] pod のログを表示する [cent@dlp ~]$ kubectl logs test-nginx-7b7d9954bd-89rkq /docker-entrypoint.sh: /docker-entrypoint.d/ is not empty, will attempt to perform configuration /docker-entrypoint.sh: Looking for shell scripts in /docker-entrypoint.d/ /docker-entrypoint.sh: Launching /docker-entrypoint.d/10-listen-on-ipv6-by-default.sh 10-listen-on-ipv6-by-default.sh: Getting the checksum of /etc/nginx/conf.d/default.conf 10-listen-on-ipv6-by-default.sh: Enabled listen on IPv6 in /etc/nginx/conf.d/default.conf /docker-entrypoint.sh: Launching /docker-entrypoint.d/20-envsubst-on-templates.sh /docker-entrypoint.sh: Configuration complete; ready for start up # pod をスケールアウトする [cent@dlp ~]$ kubectl scale deployment test-nginx --replicas=3 deployment.apps/test-nginx scaled [cent@dlp ~]$ kubectl get pods NAME READY STATUS RESTARTS AGE test-nginx-7b7d9954bd-89rkq 1/1 Running 0 103s test-nginx-7b7d9954bd-dgn4z 1/1 Running 0 9s test-nginx-7b7d9954bd-dm8pd 1/1 Running 0 9s # サービスを設定する [cent@dlp ~]$ kubectl expose deployment test-nginx --type="NodePort" --port 80 service/test-nginx exposed [cent@dlp ~]$ kubectl get services test-nginx NAME TYPE CLUSTER-IP EXTERNAL-IP PORT(S) AGE test-nginx NodePort 10.110.80.207 <none> 80:32716/TCP 6s[cent@dlp ~]$ minikube service test-nginx --url http://192.168.39.41:32716 [cent@dlp ~]$ curl http://192.168.39.41:32716 <!DOCTYPE html> <html> <head> <title>Welcome to nginx!</title> ..... ..... <p><em>Thank you for using nginx.</em></p> </body> </html> # サービスを削除する [cent@dlp ~]$ kubectl delete services test-nginx service "test-nginx" deleted # Pod を削除する [cent@dlp ~]$ kubectl delete deployment test-nginx deployment.extensions "test-nginx" deleted |
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