Help Center/ Cloud Container Engine/ User Guide/ Network/ Ingresses/ LoadBalancer Ingresses/ Advanced Setting Examples of LoadBalancer Ingresses/ Configuring HTTP/2 for a LoadBalancer Ingress
Updated on 2024-09-30 GMT+08:00
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Configuring HTTP/2 for a LoadBalancer Ingress

Ingresses can use HTTP/2 to expose Services. Connections from the load balancer to your application use HTTP/1.x by default. If your application is capable of receiving HTTP/2 requests, to enable the use of HTTP/2:

  • An HTTPS-compliant load balancer supports HTTP/2.
  • This function is available in clusters of v1.23.13-r0, v1.25.8-r0, or v1.28.3-r0.
  • After HTTP/2 is configured, if you delete the advanced configuration for enabling HTTP/2 on the CCE console or delete the target annotation from the YAML file, HTTP/2 will be disabled on the ELB.

Prerequisites

Configuring HTTP/2 for an Ingress

You can configure HTTP/2 for an ingress using either the CCE console or kubectl.

  1. Log in to the CCE console and click the cluster name to access the cluster console.
  2. Choose Services & Ingresses in the navigation pane, click the Ingresses tab, and click Create Ingress in the upper right corner.
  3. Configure ingress parameters.

    This example explains only key parameters for configuring HTTP/2. You can configure other parameters as required. For details, see Creating a LoadBalancer Ingress on the Console.

    Table 1 Key parameters

    Parameter

    Description

    Example

    Name

    Enter an ingress name.

    ingress-test

    Load Balancer

    Select a load balancer to be associated with the ingress or automatically create a load balancer.

    Shared

    Listener
    • External Protocol: Select HTTPS.
    • External Port: specifies the port of the load balancer listener. The default HTTPS port is 443.
    • Certificate Source: Select ELB server certificate.
    • Server Certificate: Use a certificate created on ELB.

      If no certificate is available, go to the ELB console and create one. For details, see Adding a Certificate.

    • Advanced Options: Add advanced configurations, select HTTP2, and set its status to Enable.
    • External Protocol: HTTPS
    • External Port: 443
    • Certificate Source: ELB server certificate
    • Server Certificate: cert-test
    • Advanced Options: HTTP2 enabled

    Forwarding Policy
    • Domain Name: Enter an actual domain name to be accessed. If it is left blank, the ingress can be accessed through the IP address. Ensure that the domain name has been registered and licensed. Once a forwarding policy is configured with a domain name specified, you must use the domain name for access.
    • Path Matching Rule: Select Prefix match, Exact match, or RegEx match.
    • Path: Enter the path provided by a backend application for external access. The path added must be valid in the backend application, or the forwarding cannot take effect.
    • Destination Service: Select an existing Service or create a Service. Any Services that do not match the search criteria will be filtered out automatically.
    • Destination Service Port: Select the access port of the destination Service.
    • Domain Name: You do not need to configure this parameter.
    • Path Matching Rule: Prefix match
    • Path: /
    • Destination Service: nginx
    • Destination Service Port: 80
    Figure 1 Configuring HTTP/2 for an ingress

  4. Click OK.
  1. Use kubectl to access the cluster. For details, see Connecting to a Cluster Using kubectl.
  2. Create a YAML file named ingress-test.yaml. The file name can be customized. 

    vi ingress-test.yaml
    An example YAML file of an ingress associated with an existing load balancer is as follows: 
    apiVersion: networking.k8s.io/v1
kind: Ingress 
metadata: 
  name: ingress-test
  annotations: 
    kubernetes.io/elb.id: <your_elb_id>  # Replace it with the ID of your existing load balancer.
    kubernetes.io/elb.ip: <your_elb_ip>  # Replace it with the IP of your existing load balancer.
    kubernetes.io/elb.port: '443'
    kubernetes.io/elb.http2-enable: 'true' # Enable HTTP/2.
spec:
  tls: 
  - secretName: ingress-test-secret
  rules: 
  - host: ''
    http: 
      paths: 
      - path: '/'
        backend: 
          service:
            name: <your_service_name>  # Replace it with the name of your target Service.
            port: 
              number: 80             # Replace 80 with the port number of your target Service.
        property:
          ingress.beta.kubernetes.io/url-match-mode: STARTS_WITH
        pathType: ImplementationSpecific
  ingressClassName: cce
    Table 2 HTTP/2 parameters

    Parameter

    Mandatory

    Type

    Description

    kubernetes.io/elb.http2-enable

    No

    String

    Whether HTTP/2 is enabled. Request forwarding using HTTP/2 improves the access performance between your application and the load balancer. However, the load balancer still uses HTTP/1.x to forward requests to the backend server.

    Options:

    • true: enabled
    • false: disabled (default value)

    Note: HTTP/2 can be enabled or disabled only when the listener uses HTTPS. This parameter is invalid and defaults to false when the listener protocol is HTTP.

  3. Create an ingress. 

    kubectl create -f ingress-test.yaml

    If information similar to the following is displayed, the ingress has been created:

    ingress/ingress-test created

  4. Check the created ingress. 

    kubectl get ingress

    If information similar to the following is displayed, the ingress has been created:

    NAME          CLASS    HOSTS     ADDRESS          PORTS   AGE
ingress-test  cce      *         121.**.**.**     80,443  10s

Parent Topic: Advanced Setting Examples of LoadBalancer Ingresses