Configuring HTTP/2 for a LoadBalancer Service

Prerequisites

• A Kubernetes cluster is available and the cluster version meets the following requirements:
  • v1.23: v1.23.13-r0 or later
  • v1.25: v1.25.8-r0 or later
  • v1.27: v1.27.5-r0 or later
  • v1.28: v1.28.3-r0 or later
  • Other clusters of later versions

• To create a cluster using commands, ensure kubectl is used. For details, see Connecting to a Cluster Using kubectl.

Using the CCE Console

1. Log in to the CCE console and click the cluster name to access the cluster console.
2. In the navigation pane, choose Services & Ingresses. In the upper right corner, click Create Service.
3. Configure Service parameters. In this example, only mandatory parameters are listed. For details about how to configure other parameters, see Creating a LoadBalancer Service.
   • Service Name: Specify a Service name, which can be the same as the workload name.
   • Service Type: Select LoadBalancer.
   • Selector: Add a label and click Confirm. The Service will use this label to select pods. You can also click Reference Workload Label to use the label of an existing workload. In the dialog box that is displayed, select a workload and click OK.
   • Load Balancer: Select a load balancer type and creation mode.
     • A load balancer can be dedicated or shared. To enable HTTP/HTTPS on the listener port of a dedicated load balancer, the type of the load balancer must be Application (HTTP/HTTPS) or Network (TCP/UDP) & Application (HTTP/HTTPS).
     • This section uses an existing load balancer as an example. For details about the parameters for automatically creating a load balancer, see Table 1.
   • Ports
     • Protocol: Select TCP. If you select UDP, HTTP and HTTPS will be unavailable.
     • Service Port: port used by the Service. The port number ranges from 1 to 65535.
     • Container Port: listener port of the workload. For example, Nginx uses port 80 by default.
     • Frontend Protocol: In this example, HTTPS must be enabled for the Service to use HTTP/2. For a dedicated load balancer, to use HTTP/HTTPS, the type of the load balancer must be Application (HTTP/HTTPS).
   • Listener
     • SSL authentication is available only in clusters of v1.23.14-r0, v1.25.9-r0, v1.27.6-r0, v1.28.4-r0, or later versions.
       • One-way authentication: Only the backend server is authenticated. If you also need to authenticate the identity of the client, select mutual authentication.
       • Mutual authentication: If you want the clients and the load balancer to authenticate each other, select this option. Only authenticated clients will be allowed to access the load balancer.
     • CA Certificate: If SSL Authentication is set to Mutual authentication, add a CA certificate to authenticate the client. A CA certificate is issued by a certificate authority (CA) and used to verify the certificate issuer. If HTTPS mutual authentication is required, HTTPS connections can be established only when the client provides a certificate issued by a specific CA.
     • Server Certificate: Select a server certificate when HTTPS is used. If no certificate is available, create one on the ELB console. For details, see Adding a Certificate.
     • SNI: Add an SNI certificate containing a domain name. If no certificate is available, create one on the ELB console. For details, see Adding a Certificate.
     • Advanced Options: Click Add custom container network settings and enable HTTP/2.
   Figure 1 Enabling HTTP/2
   

4. Click OK.

Using kubectl

To enable HTTP/2, add the following annotation:

kubernetes.io/elb.http2-enable: 'true'

apiVersion: v1
kind: Service
metadata:
  name: test
  labels:
    app: test
    version: v1
  namespace: default
  annotations:
    kubernetes.io/elb.class: performance
    kubernetes.io/elb.id: 35cb350b-23e6-4551-ac77-10d5298f5204
    kubernetes.io/elb.protocol-port: https:443
    kubernetes.io/elb.cert-id: b64ab636f1614e1a960b5249c497a880
    kubernetes.io/elb.http2-enable: 'true'
    kubernetes.io/elb.lb-algorithm: ROUND_ROBIN
spec:
  selector:
    app: test
    version: v1
  externalTrafficPolicy: Cluster
  ports:
    - name: cce-service-0
      targetPort: 80
      nodePort: 0
      port: 443
      protocol: TCP
  type: LoadBalancer
  loadBalancerIP: **.**.**.**