[2] MicroK8s – Alokacja
11 lutego 2021Przedstawię teraz podstawowe czynności i operacja ne MicroK8s
[1] Stwórz i skasuj pojemnik 😉 (kurde, nie wiem jak to po polsku nazwać, po angielsku chodzi oczywiście o PODS’y).
# uruchomimy teraz podsa [test-nginx] [root@vlsr01 ~]# microk8s kubectl create deployment test-nginx --image=nginx deployment.apps/test-nginx created [root@vlsr01 ~]# microk8s kubectl get pods NAME READY STATUS RESTARTS AGE test-nginx-59ffd87f5-4x7mr 0/1 ContainerCreating 0 13s # pokaż dostępne zmienne dla [test-nginx] [root@vlsr01 ~]# microk8s kubectl exec test-nginx-59ffd87f5-4x7mr -- env PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin HOSTNAME=test-nginx-59ffd87f5-4x7mr NGINX_VERSION=1.19.6 NJS_VERSION=0.5.0 PKG_RELEASE=1~buster KUBERNETES_PORT=tcp://10.152.183.1:443 KUBERNETES_PORT_443_TCP=tcp://10.152.183.1:443 KUBERNETES_PORT_443_TCP_PROTO=tcp KUBERNETES_PORT_443_TCP_PORT=443 KUBERNETES_PORT_443_TCP_ADDR=10.152.183.1 KUBERNETES_SERVICE_HOST=10.152.183.1 KUBERNETES_SERVICE_PORT=443 KUBERNETES_SERVICE_PORT_HTTPS=443 HOME=/root # dostęp do powłoki podsa [test-nginx] [root@vlsr01 ~]# microk8s kubectl exec -it test-nginx-59ffd87f5-4x7mr -- bash root@test-nginx-59ffd87f5-4x7mr:/# hostname test-nginx-59ffd87f5-4x7mr root@test-nginx-59ffd87f5-4x7mr:/# exit exit # pokaż logi [test-nginx] [root@vlsr01 ~]# microk8s kubectl logs test-nginx-59ffd87f5-4x7mr /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: Launching /docker-entrypoint.d/20-envsubst-on-templates.sh /docker-entrypoint.sh: Configuration complete; ready for start up # przeskaluj podsa [root@vlsr01 ~]# microk8s kubectl scale deployment test-nginx --replicas=3 deployment.apps/test-nginx scaled [root@vlsr01 ~]# microk8s kubectl get pods NAME READY STATUS RESTARTS AGE test-nginx-59ffd87f5-4x7mr 1/1 Running 0 5m40s test-nginx-59ffd87f5-w28gh 1/1 Running 0 9s test-nginx-59ffd87f5-l2qks 1/1 Running 0 9s # ustaw usługi [root@vlsr01 ~]# microk8s kubectl expose deployment test-nginx --type="NodePort" --port 80 service/test-nginx exposed [root@vlsr01 ~]# microk8s kubectl get services test-nginx NAME TYPE CLUSTER-IP EXTERNAL-IP PORT(S) AGE test-nginx NodePort 10.152.183.223 <none> 80:32083/TCP 9s # sprawdź dostęp [root@vlsr01 ~]# curl 10.152.183.223 <!DOCTYPE html> <html> <head> <title>Welcome to nginx!</title> <style> body { width: 35em; margin: 0 auto; font-family: Tahoma, Verdana, Arial, sans-serif; } </style> </head> <body> <h1>Welcome to nginx!</h1> <p>If you see this page, the nginx web server is successfully installed and working. Further configuration is required.</p> <p>For online documentation and support please refer to <a href="http://nginx.org/">nginx.org</a>.<br/> Commercial support is available at <a href="http://nginx.com/">nginx.com</a>.</p> <p><em>Thank you for using nginx.</em></p> </body> </html> # skasuj usługę [root@vlsr01 ~]# microk8s kubectl delete services test-nginx service "test-nginx" deleted # skasuj podsa [root@vlsr01 ~]# microk8s kubectl delete deployment test-nginx deployment.apps "test-nginx" deleted