Help Center/ Cloud Container Engine/ User Guide/ Network/ Ingresses/ LoadBalancer Ingresses/ Advanced Setting Examples of LoadBalancer Ingresses/ Configuring Timeout for a LoadBalancer Ingress
Updated on 2024-11-12 GMT+08:00
View PDF
Share

Configuring Timeout for a LoadBalancer Ingress

LoadBalancer ingresses support the following timeout settings:

  • Idle timeout setting for client connections: maximum duration for keeping a connection when no client request is received. If no request is received during this period, the load balancer closes the connection and establishes a new one with the client when the next request arrives.
  • Timeout for waiting for a request from a client: If the client fails to send a request header to the load balancer during the timeout duration or the interval for sending body data exceeds a specified period, the load balancer will release the connection.
  • Timeout setting for waiting for a response from a backend server: If the backend server fails to respond during the timeout duration, the load balancer will stop waiting and return HTTP 504 Gateway Timeout to the client.

If you delete the timeout configuration when updating an ingress, the timeout configuration of the existing listener will be reset to the default value.

Prerequisites

  • A CCE standard or Turbo cluster is available. The table below shows which cluster versions support the timeout configuration.

    Timeout Type

    Load Balancer Type

    Supported Cluster Version

    Idle Timeout

    Dedicated
    • v1.19: v1.19.16-r30 or later
    • v1.21: v1.21.10-r10 or later
    • v1.23: v1.23.8-r10 or later
    • v1.25: v1.25.3-r10 or later
    • Other clusters of later versions

    Request Timeout

    Dedicated

    Response Timeout

    Dedicated

    Idle Timeout

    Shared
    • 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

    Request Timeout

    Shared

    Response Timeout

    Shared
  • An available workload has been deployed in the cluster for external access. If no workload is available, deploy a workload by referring to Creating a Deployment, Creating a StatefulSet, or Creating a DaemonSet.
  • A Service for external access has been configured for the workload. Services Supported by LoadBalancer Ingresses lists the Service types supported by LoadBalancer ingresses.

Configuring Timeout

You can configure timeout 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 timeout. 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. A load balancer can be dedicated or shared.

    Dedicated

    Listener
    • External Protocol: HTTP and HTTPS are available.
    • External Port: specifies the port of the load balancer listener.
    • Advanced Options
      • Idle Timeout (s): specifies the idle timeout of a client connection. If there are no requests reaching the load balancer during the timeout duration, the load balancer will disconnect the connection from the client and establish a new connection when there is a new request.
      • Request Timeout (s): specifies the timeout duration for waiting for a client request.

        Specifically:

        If the client fails to send a request header to the load balancer during the timeout duration, the request will be interrupted.

        If the interval between two consecutive request bodies reaching the load balancer is greater than the timeout duration, the connection will be disconnected.

      • Response Timeout (s): specifies the timeout duration for waiting for a response from a backend server. After a request is forwarded to the backend server, if the backend server does not respond during the timeout duration, the load balancer will stop waiting and return HTTP 504 Gateway Timeout.
    • External Protocol: HTTP
    • External Port: 80
    • Advanced Options
      • Idle Timeout (s): 60
      • Request Timeout (s): 60
      • Response Timeout (s): 60

    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 timeout

  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: test
  namespace: default
  annotations:
    kubernetes.io/elb.port: '80'
    kubernetes.io/elb.id: <your_elb_id>    # In this example, an existing dedicated load balancer is used. Replace its ID with the ID of your dedicated load balancer.
    kubernetes.io/elb.class: performance
    kubernetes.io/elb.keepalive_timeout: '300'  # Timeout setting for client connections
    kubernetes.io/elb.client_timeout: '60'      # Timeout duration for waiting for a request from a client
    kubernetes.io/elb.member_timeout: '60'      # Timeout for waiting for a response from a backend server
spec:
  rules:
    - host: ''
      http:
        paths:
          - path: /
            backend:
              service:
                name: test
                port:
                  number: 80
            property:
              ingress.beta.kubernetes.io/url-match-mode: STARTS_WITH
            pathType: ImplementationSpecific
  ingressClassName: cce
    Table 2 Key annotation parameters

    Parameter

    Mandatory

    Type

    Description

    kubernetes.io/elb.keepalive_timeout

    No

    String

    Timeout for client connections. If there are no requests reaching the load balancer during the timeout duration, the load balancer will disconnect the connection from the client and establish a new connection when there is a new request.

    The value ranges from 0 to 4000 seconds. The default value is 60.

    kubernetes.io/elb.client_timeout

    No

    String

    Timeout for waiting for a request from a client. There are two cases:

    • If the client fails to send a request header to the load balancer during the timeout duration, the request will be interrupted.
    • If the interval between two consecutive request bodies reaching the load balancer is greater than the timeout duration, the connection will be disconnected.

    The value ranges from 1 to 300 (in seconds). The default value is 60.

    kubernetes.io/elb.member_timeout

    No

    String

    Timeout for waiting for a response from a backend server. After a request is forwarded to the backend server, if the backend server does not respond within the duration specified by member_timeout, the load balancer will stop waiting and return HTTP 504 Gateway Timeout.

    The value ranges from 1 to 300 (in seconds). The default value is 60.

  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