$ kubectl get pods --all-namespaces


$ iptables -nvL


$ systemctl status firewalld


$ helm repo add stable https://kubernetes-charts.storage.googleapis.com/
$ helm repo update
$ helm search repo stable


$ helm show chart stable/elastic-stack


$ export KUBECONFIG=/etc/rancher/k3s/k3s.yaml
$ kubectl get pods --all-namespaces
$ helm ls --all-namespaces


$ helm install stable/elastic-stack --generate-name


$ export POD_NAME=$(kubectl get pods -n default | grep kibana | awk '{print $1}')
$ echo "Visit http://127.0.0.1:5601 to use Kibana"
$ kubectl port-forward --namespace default $POD_NAME 5601:5601