<p>I have exposed a service on an external port on all nodes in a kubernetes
cluster from:</p>

<p><code>kubectl create -f nginx-service.yaml</code></p>

<p>You have exposed your service on an external port on all nodes in your
cluster.  If you want to expose this service to the external internet, you may
need to set up firewall rules for the service port(s) (tcp:30002) to serve traffic.</p>

<p>See <a href="http://releases.k8s.io/release-1.2/docs/user-guide/services-firewalls.md" rel="noreferrer">http://releases.k8s.io/release-1.2/docs/user-guide/services-firewalls.md</a> for more details.
service "nginx-service" created.`</p>

<p>Is there anyway to get the external ports of the kubernetes cluster?</p>

<p><code>kubectl get svc --all-namespaces -o go-template='{{range .items}}{{range.spec.ports}}{{if .nodePort}}{{.nodePort}}{{"\n"}}{{end}}{{end}}{{end}}'</code></p>

<p>This gets all services in all namespaces, and does basically: "for each service, for each port, if nodePort is defined, print nodePort".</p>
