Access services through SLB instances

Use the command-line tool

Method 1:

1. Use kubectl to create an NGINX service.
   • Create an NGINX service.

     kubectl run nginx --image=registry.aliyuncs.com/acs/netdia:latest

   • Query the pod information.

     kubectl get pod

     NAME                                   READY     STATUS    RESTARTS   AGE
     nginx-2721357637-dvwq3                 1/1       Running   1          6s

2. Set the type of the NGINX service to LoadBalancer. This allows you to access the service through an SLB instance over the Internet.
   • Set the type of the NGINX service to LoadBalancer.

     kubectl expose deployment nginx --port=80 --target-port=80 --type=LoadBalancer

   • Query the service information.

     kubectl get svc

     NAME                  CLUSTER-IP      EXTERNAL-IP      PORT(S)                        AGE
     nginx                 172.19.XX.XX    101.37.XX.XX     80:31891/TCP                   4s

3. Enter http://101.37.XX.XX in a browser to access the service.

Method 2:

1. Write the following content to the nginx-svc.yml file.

   apiVersion: v1
   kind: Service
   metadata:
     labels:
       run: nignx
     name: nginx-01
     namespace: default
   spec:
     ports:
     - port: 80
       protocol: TCP
       targetPort: 80
     selector:
       run: nginx
     type: LoadBalancer

2. Run the following command to create an NGINX service of the LoadBalancer type:

   kubectl apply -f nginx-svc.yml

3. Run the following command to obtain the public IP address of the service:

   kubectl get service

   NAME           TYPE           CLUSTER-IP      EXTERNAL-IP      PORT(S)        AGE9d
   ngi-01nx       LoadBalancer   172.19.XX.XX    101.37.XX.XX     80:32325/TCP   3h

4. Enter http://101.37.XX.XX in a browser to access the service.

Use the Dashboard module in the ACK console

1. Write the following content to the nginx-svc.yml file.

   apiVersion: v1
   kind: Service
   metadata:
     labels:
       run: nginx
     name: http-svc
     namespace: default
   spec:
     ports:
     - port: 80
       protocol: TCP
       targetPort: 80
     selector:
       run: nginx
     type: LoadBalancer

2. Log on to the ACK console.
3. In the left-side navigation pane, click Clusters.
4. On the Clusters page, find the specific cluster, and select Dashboard from the More drop-down list in the Actions column.
5. Click CREATE to create a service.

   

6. Click the CREATE FROM FILE tab. Select the nginx-svc.yml file.
7. Click UPLOAD.
   An NGINX service of the LoadBalancer type and an SLB instance are created. The service name is http-svc.
8. In the left-side navigation pane, select the default namespace. On the Overview page, you can view services in the default namespace in the Services section.
   You can find the new service http-svc and its public endpoint http://114.55.XX.XX:80.
9. Enter http://114.55.XX.XX:80 in a browser to access the service.

Use the ACK console

1. Log on to the ACK console.
2. In the left-side navigation pane, click Clusters.
3. On the Clusters page, click the name of the target cluster or click Manage in the Actions column.
4. In the left-side navigation pane, click Workload.
5. On the Deployments tab, click Create from Template.
6. Select Custom in Sample Template, and copy the following content to the Template section:

   apiVersion: v1
   kind: Service
   metadata:
     labels:
       run: nginx
     name: ngnix
     namespace: default
   spec:
     ports:
     - port: 80
       protocol: TCP
       targetPort: 80
     selector:
       run: nginx
     type: LoadBalancer

7. Click Create.

   In the left-side navigation pane, click Services, and select the specific namespace from the namespace drop-down list to view the services deployed in the namespace.

References

Alibaba Cloud SLB supports a variety of features. For example, you can configure the health check, billing method, and instance type for an SLB instance by setting parameters. For more information, see Access services through SLB instances.