Minikube : Basic Usage2025/01/22 |
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This is the basic operation on Single Node Kubernetes Cluster on Minikube. |
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| [1] | Create or Delete Pods. |
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# run [test-nginx] pods [cent@dlp ~]$ kubectl create deployment test-nginx --image=nginx deployment.apps/test-nginx created kubectl get pods NAME READY STATUS RESTARTS AGE test-nginx-b6dfcf6bd-v7gph 1/1 Running 0 11s # show environment variables for [test-nginx] pod [cent@dlp ~]$ kubectl exec test-nginx-b6dfcf6bd-v7gph -- env PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin HOSTNAME=test-nginx-b6dfcf6bd-v7gph 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=1.27.3 NJS_VERSION=0.8.7 NJS_RELEASE=1~bookworm PKG_RELEASE=1~bookworm DYNPKG_RELEASE=1~bookworm HOME=/root # shell access to [test-nginx] pod [cent@dlp ~]$ kubectl exec -it test-nginx-b6dfcf6bd-v7gph -- bash
hostname test-nginx-b6dfcf6bd-v7gph
root@test-nginx-b6dfcf6bd-v7gph:/#
exit
# show logs of [test-nginx] pod [cent@dlp ~]$ kubectl logs test-nginx-b6dfcf6bd-v7gph /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: info: Getting the checksum of /etc/nginx/conf.d/default.conf 10-listen-on-ipv6-by-default.sh: info: Enabled listen on IPv6 in /etc/nginx/conf.d/default.conf /docker-entrypoint.sh: Sourcing /docker-entrypoint.d/15-local-resolvers.envsh /docker-entrypoint.sh: Launching /docker-entrypoint.d/20-envsubst-on-templates.sh /docker-entrypoint.sh: Launching /docker-entrypoint.d/30-tune-worker-processes.sh /docker-entrypoint.sh: Configuration complete; ready for start up 2025/01/21 23:56:51 [notice] 1#1: using the "epoll" event method 2025/01/21 23:56:51 [notice] 1#1: nginx/1.27.3 2025/01/21 23:56:51 [notice] 1#1: built by gcc 12.2.0 (Debian 12.2.0-14) 2025/01/21 23:56:51 [notice] 1#1: OS: Linux 5.10.207 2025/01/21 23:56:51 [notice] 1#1: getrlimit(RLIMIT_NOFILE): 1048576:1048576 2025/01/21 23:56:51 [notice] 1#1: start worker processes 2025/01/21 23:56:51 [notice] 1#1: start worker process 30 2025/01/21 23:56:51 [notice] 1#1: start worker process 31 # scale out pods [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-b6dfcf6bd-fd4gx 1/1 Running 0 8s test-nginx-b6dfcf6bd-v7gph 1/1 Running 0 2m39s test-nginx-b6dfcf6bd-xzfck 1/1 Running 0 8s # set service [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 10.99.66.26 <none> 80:30139/TCP 6s
[cent@dlp ~]$
[cent@dlp ~]$ minikube service test-nginx --url http://192.168.39.150:30139 curl http://192.168.39.150:30139 <!DOCTYPE html> <html> <head> <title>Welcome to nginx!</title> ..... ..... <p><em>Thank you for using nginx.</em></p> </body> </html> # delete service [cent@dlp ~]$ kubectl delete services test-nginx service "test-nginx" deleted # delete pods [cent@dlp ~]$ kubectl delete deployment test-nginx deployment.extensions "test-nginx" deleted |
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