Configuring HTTP for a LoadBalancer Service

Configuring an HTTP Service

You can create a Service for a workload after it is created. Creating a Service has no impact on the workload. Once created, the Service can be used by the workload for network access immediately.

1. Log in to the CCI 2.0 console.
2. In the navigation pane, choose Services. On the right of the page, click Create from YAML.
3. Import or create a YAML file.

   The following are example files in different formats:

   • Resource description in the Service.yaml file

     apiVersion: cci/v2
     kind: Service
     metadata:
       name: kubectl-test
       namespace: kubectl
       annotations:
         kubernetes.io/elb.class: elb
         kubernetes.io/elb.id: 1234567890 # Load balancer ID. Only dedicated load balancers are supported.
         kubernetes.io/elb.protocol-port: "http:80"  # HTTP and port. The port must be the same as that in spec.ports
     spec:
       selector:
         app: kubectl-test # Label of the associated workload
       ports:
         - name: service-0
           targetPort: 80   # Container port
           port: 80        # Access port
           protocol: TCP    # Set the protocol to TCP.
       type: LoadBalancer

   • Resource description in the Service.json file

     {
     	"apiVersion": "cci/v2",
     	"kind": "Service",
     	"metadata": {
     		"name": "kubectl-test",
     		"namespace": "kubectl",
     		"annotations": {
                             "kubernetes.io/elb.class": "elb",
     			"kubernetes.io/elb.id": "1234567890"  # Load balancer ID. Only dedicated load balancers are supported.
                             "kubernetes.io/elb.protocol-port": "http:80"  # HTTP and port. The port must be the same as that in spec.ports.
     		}
     	},
     	"spec": {
     		"selector": {
     			"app": "kubectl-test" # Label of the associated workload
     		},
     		"ports": [
     			{
     				"name": "service-0",
     				"targetPort": 80,     # Container port
     				"port": 80,           # Access port
     				"protocol": "TCP",    # Set the protocol to TCP.
     				"type": "LoadBalancer"
     			}
     		]
     	}
     }

4. Click OK. Access the workload through the load balancer's IP address and port in the format of <IP-address>:<port>.

Updating a Service

After a Service is created, you can update its access port.

1. Log in to the CCI 2.0 console.
2. In the navigation pane, choose Services. On the Services page, select the target namespace, locate the Service, and click Edit YAML in the Operation column.
3. Only the access port can be modified.

   spec.ports[i].port indicates the access port. The port number ranges from 1 to 65535. You need to change the value of kubernetes.io/elb.protocol-port accordingly.

   

   After a Service of the LoadBalancer type is created, the listener's protocol cannot be changed (for example, the protocol cannot be changed from TCP to UDP or from HTTP to HTTPS). To change the protocol, you need to delete the Service and create another one.

4. Click OK. The Service will be updated for the workload.

Parameters for an HTTP Service

You can refer to the following table to add the annotations to configure a listener for an HTTP Service.