🔗 Services
Pods are born and die, and the IP changes every time they are recreated. The Service creates a fixed address in front of the pods, so that other applications (or you) can always reach them.
| Type | Who accesses | When to use |
|---|---|---|
ClusterIP | Only inside the cluster | Communication between applications |
NodePort | From outside, via node IP + port | Testing and simple access |
LoadBalancer | From outside, via its own IP | Production, without Ingress |
Services are created with kubectl. The Nuvion Panel is used to open the external network access (step 5).
🚀 Before you start
- Have cluster access configured (see Cluster Access).
🚀 1. Create a test application
kubectl create deployment web --image=nginx --replicas=2
kubectl get pods
Wait for both pods to be Running.
🚀 2. Create an internal Service (ClusterIP)
kubectl expose deployment web --name=web-svc --port=80 --target-port=80
kubectl get svc web-svc
Note the CLUSTER-IP shown.
🚀 3. Test access inside the cluster
kubectl run teste-curl --rm -it --image=curlimages/curl --restart=Never -- curl http://web-svc
If the Welcome to nginx! page appears, the Service is working.
🚀 4. Create an external Service (NodePort)
kubectl expose deployment web --name=web-nodeport --type=NodePort --port=80
kubectl get svc web-nodeport
The PORT(S) column shows something like 80:31245/TCP. The number after the
colon (31245) is the external port. Note yours.
🚀 5. Open the port on the network
To access from outside, the port must be open and the node must have an accessible IP.
- 🖥️ Nuvion Panel
- ⌨️ kubectl (CLI)
- Go to Compute > Security Groups and open the group used by the cluster nodes.
- Add an inbound rule, protocol TCP, on the port noted in step 4.
- Go to Compute > Floating IPs and associate an IP with one of the workers, if you do not have one yet.
To find the internal IP of the nodes:
kubectl get nodes -o wide
Opening the port and the floating IP are done in the Nuvion Panel (see the tab next to this one).
🚀 6. Access the application
In the browser, open http://NODE-IP:PORT (example: http://203.0.113.10:31245).
✅ How to know it worked
The Welcome to nginx! page opens in the browser.
❗ Common problems
| Symptom | Cause | Solution |
|---|---|---|
| Page does not open (timeout) | Port not open or node without an accessible IP | Review step 5 |
Empty ENDPOINTS in kubectl get endpoints web-svc | The Service did not find pods | Check that the pods are Running |
EXTERNAL-IP shows as none | Normal for NodePort | Use the node IP |
🧹 Cleanup
kubectl delete svc web-svc web-nodeport
kubectl delete deployment web
➡️ Next step: Ingress
🧠 Questions?
Talk to our SaveinCloud technical support team!