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

LoadBalancer ingresses support data compression, which reduces the size of files to be transferred, improves file transfer efficiency, and reduces the bandwidth needed for the transmission.

  • This function depends on the ELB capability. Before using this function, check whether it is supported in the current region. For details about the regions where this function is supported, see Elastic Load Balance Function Overview.
  • After data compression is configured, if you delete the data compression configuration on the CCE console or delete the target annotation from the YAML file, the configuration on the ELB will be retained.

Prerequisites

  • A Kubernetes cluster is available and the cluster version meets the following requirements:
    • v1.23: v1.23.14-r0 or later
    • v1.25: v1.25.9-r0 or later
    • v1.27: v1.27.6-r0 or later
    • v1.28: v1.28.4-r0 or later
    • Versions later than v1.28
  • To create a cluster using commands, ensure kubectl is used. For details, see Connecting to a Cluster Using kubectl.

Configuring GZIP Data Compression

You can configure GZIP data compression 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. In the navigation pane, choose Services & Ingresses. 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 GZIP data compression. 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. In this example, only dedicated load balancers are supported.

    Dedicated

    Listener
    • External Protocol: HTTP and HTTPS are available.
    • External Port: specifies the port of the load balancer listener.
    • Advanced Options
      Data Compression: If this function is enabled, specific files will be compressed. If you do not enable this function, files will not be compressed.
      NOTE:
      • Brotli can compress all file formats.
      • GZIP can compress the files in the following format:

        text, xml text, plain text, css application, javascript application, x-javascript application, rss+xml application, atom+xml application, xml application, or json
    • External Protocol: HTTP
    • External Port: 80
    • Advanced Options

      Data Compression: Enable

    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 GZIP data compression

  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.class: performance                # Load balancer type
    kubernetes.io/elb.port: '80'
    kubernetes.io/elb.gzip-enabled: 'true'              # Enable data compression.
spec:
  rules: 
  - host: ''
    http: 
      paths: 
      - path: '/'
        backend: 
          service:
            name: <your_service_name>  # Replace it with the name of your target Service.
            port: 
              number: 8080             # Replace 8080 with the port number of your target Service.
        property:
          ingress.beta.kubernetes.io/url-match-mode: STARTS_WITH
        pathType: ImplementationSpecific
  ingressClassName: cce
    Table 2 Key parameters

    Parameter

    Type

    Description

    kubernetes.io/elb.gzip-enabled

    String
    • true: Data compression is enabled, and specific file types will be compressed.
    • false: Data compression is disabled, and no files will be compressed. By default, data compression is disabled.

    The files in the following format can be compressed:

    • Brotli can compress all file formats.
    • GZIP can compress the files in the following format: text, xml text, plain text, css application, javascript application, x-javascript application, rss+xml application, atom+xml application, xml application, or json

    This function is available only for HTTP/HTTPS listeners of dedicated load balancers.

  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      10s

Parent Topic: Advanced Setting Examples of LoadBalancer Ingresses