Elastic Load Balance
Elastic Load Balance
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" in this service
All results for "
" in this service
What's New
What's New
Function Overview
Service Overview
What Is ELB?
ELB Advantages
How ELB Works
Application Scenarios
Differences Between Dedicated and Shared Load Balancers
Load Balancer Types
Feature Comparison Details
Load Balancing on a Public or Private Network
Network Traffic Paths
Specifications of Dedicated Load Balancers
Notes and Constraints
Permissions
Product Concepts
Basic Concepts
Region and AZ
ELB and Other Services
Billing
Billing Overview
Billing Mode
Overview
Pay-per-Use Billing
Billing Items (Dedicated Load Balancers)
Billing Items (Shared Load Balancers)
Billing Examples
Bills
Arrears
Stopping Billing
Cost Management
FAQs
When Do I Need Public Bandwidth for ELB?
Will I Be Billed for Both the Bandwidth Used by the Load Balancer and the Bandwidth Used by Backend Servers?
Can I Modify the Bandwidth of a Load Balancer?
What Functions Will Become Unavailable If a Load Balancer Is Frozen?
Getting Started
Using ELB to Distribute Traffic to a Web Application Across ECSs
Using ELB to Distribute Traffic to Multiple Web Applications Across ECSs
User Guide
User Guide for Dedicated Load Balancers
Using a Dedicated Load Balancer
Permissions Management
Creating a User and Granting Permissions
Creating a Custom Policy
Load Balancer
Dedicated Load Balancer Overview
Creating a Dedicated Load Balancer
Configuring Modification Protection or Deletion Protection for Dedicated Load Balancers
Modifying the Basic Configurations of a Dedicated Load Balancer
Modifying the Network Configurations of a Dedicated Load Balancer
Exporting Dedicated Load Balancers
Deleting or Unsubscribing from Dedicated Load Balancers
Listener
Listener Overview
Network Listeners
Adding a TCP Listener
Adding a UDP Listener
Adding a UDP Listener (with a QUIC Backend Server Group Associated)
Application Listeners
Adding an HTTP Listener
Adding an HTTPS Listener
Forwarding Policy
Advanced Forwarding
Advanced Forwarding
Managing an Advanced Forwarding Policy
HTTP Headers
Enabling HTTP/2 for Faster Communication
Managing a Listener
Backend Server Group
Backend Server Group Overview
Creating a Backend Server Group
Controlling Traffic Distribution
Load Balancing Algorithms
Enabling Sticky Session to Accelerate Access
Slow Start
Changing a Backend Server Group
Managing a Backend Server Group
Backend Server
Backend Server Overview
Security Group and Network ACL Rules
Adding Backend Servers in the Same VPC as a Load Balancer
Adding Backend Servers in a Different VPC from a Load Balancer
Health Check
Health Check
Configuring a Health Check
Security
Using Dedicated Load Balancers to Transfer Client IP Address
Configuring TLS Security Policies for Encrypted Communication
Using SNI Certificates for Access Through Multiple Domain Names
Certificate
Certificate Overview
Adding a Certificate
Managing Certificates
Binding or Replacing a Certificate
Replacing the Certificate Bound to Different Listeners
Access Control
What Is Access Control?
IP Address Group
Enabling Access Logging for Your Load Balancer
Tags and Quotas
Tag
Quotas
Cloud Eye Monitoring
Monitoring ELB Resources
ELB Monitoring Metrics
Event Monitoring
Viewing Traffic Usage
CTS Auditing
Key Operations Recorded by CTS
Viewing Traces
User Guide for Shared Load Balancers
Permissions Management
Creating a User and Granting Permissions
Creating a Custom Policy
Load Balancer
Shared Load Balancer Overview
Creating a Shared Load Balancer
Configuring Modification Protection for Shared Load Balancers
Changing the Network Configurations of a Shared Load Balancer
Exporting a Shared Load Balancer List
Deleting a Shared Load Balancer
Enabling or Disabling a Shared Load Balancer
Listener
Listener Overview
Adding a TCP Listener
Adding a UDP Listener
Adding an HTTP Listener
Adding an HTTPS Listener
Forwarding Policy
Enabling HTTP/2 for Faster Communication
Managing a Listener
Deleting a Listener
Backend Server Group
Backend Server Group Overview
Creating a Backend Server Group
Controlling Traffic Distribution
Load Balancing Algorithms
Enabling Sticky Session to Accelerate Access
Changing a Backend Server Group
Managing a Backend Server Group
Backend Server
Backend Server Overview
Security Group and Network ACL Rules
Cloud Servers
Health Check
Health Check
Enabling or Disabling Health Check
Security
Transfer Client IP Address
SNI Certificate
TLS Security Policy
Access Control
What Is Access Control?
IP Address Group
Certificate
Certificate Overview
Adding a Certificate
Managing Certificates
Binding or Replacing a Certificate
Replacing the Certificate Bound to Different Listeners
Access Logging
Tags and Quotas
Tag
Quotas
Cloud Eye Monitoring
Monitoring ELB Resources
Monitoring Metrics
Viewing Traffic Usage
CTS Auditing
Key Operations Recorded by CTS
Viewing Traces
Self-service Troubleshooting
Overview
Troubleshooting an Unhealthy Backend Server
Other Issues
Appendix
Configuring the TOA Module
Best Practices
Viewing Traffic Usage
Routing Traffic to Backend Servers in Different VPCs
Overview
Routing Traffic to Backend Servers in Different VPCs from the Load Balancer
Routing Traffic to Backend Servers in the Same VPC as the Load Balancer
API Reference
Before You Start
API Overview
Calling APIs
Making an API Request
Authentication
Response
APIs (V3)
API Version
Querying API Versions
Quota
Querying Quotas
Querying Quota Usage
AZ
Querying AZs
Load Balancer Flavor
Querying Flavors
Viewing the Details of a Flavor
Reserved IP Address
Calculating the Number of Reserved IP Addresses
Load Balancer
Creating a Load Balancer
Querying Load Balancers
Viewing the Details of a Load Balancer
Updating a Load Balancer
Deleting a Load Balancer
Querying the Status Tree of a Load Balancer
Certificate
Creating a Certificate
Querying Certificates
Querying the Details of a Certificate
Updating a Certificate
Deleting a Certificate
Security Policy
Creating a Custom Security Policy
Querying Custom Security Policies
Querying the Details of a Custom Security Policy
Updating a Custom Security Policy
Deleting a Custom Security Policy
Querying System Security Policies
IP Address Group
Creating an IP Address Group
Querying IP Address Groups
Querying the Details of an IP Address Group
Updating an IP Address Group
Deleting an IP Address Group
Updating IP Addresses in an IP Address Group
Deleting IP Addresses from an IP Address Group
Listener
Adding a Listener
Querying Listeners
Viewing the Details of a Listener
Updating a Listener
Deleting a Listener
Backend Server Group
Creating a Backend Server Group
Querying Backend Server Groups
Querying the Details of a Backend Server Group
Updating a Backend Server Group
Deleting a Backend Server Group
Deleting a Backend Server Group and Associated Resources
Backend Server
Adding a Backend Server
Querying Backend Servers in a Backend Server Group
Viewing the Details of a Backend Server
Updating a Backend Server
Removing a Backend Server
Health Check
Configuring a Health Check
Querying Health Checks
Viewing the Details of a Health Check
Updating a Health Check
Deleting a Health Check
Forwarding Policy
Adding a Forwarding Policy
Querying Forwarding Policies
Querying the Details of a Forwarding Policy
Modifying a Forwarding Policy
Deleting a Forwarding Policy
Forwarding Rule
Adding a Forwarding Rule
Querying Forwarding Rules
Viewing the Details of a Forwarding Rule
Updating a Forwarding Rule
Deleting a Forwarding Rule
Log
Creating a Log
Querying Logs
Viewing the Details of a Log
Updating a Log
Deleting a Log
Examples
Creating a Dedicated Load Balancer and Binding a New EIP to It
Adding a Listener to a Dedicated Load Balancer
Deleting a Dedicated Load Balancer
Querying the ID of an ECS Used as a Backend Server
Permissions and Supported Actions
Introduction
Supported Actions (V2)
Load Balancer
Listener
Backend Server Group
Backend Server
Health Check
Forwarding Policy
Forwarding Rule
Whitelist
SSL Certificate
Quota
Tag
Precautions for API Permissions
Supported Actions (V3)
Load Balancer
Listener
Backend Server Group
Backend Server
Health Check
Forwarding Policy
Forwarding Rule
IP Address Group
Certificate
Security Policy
Quota
API Version
Availability Zone
Load Balancer Flavor
Precautions for API Permissions
Appendix
Error Codes
Status Codes
Obtaining a Project ID
SDK Reference
SDK Overview
FAQs
Service Abnormality
What Can I Do If There Is Packet Loss?
Why Can't I Access My Backend Servers Through a Load Balancer?
Why Does a Server Occasionally Time Out When a Client Access It Through Different Load Balancers or Different Listeners of a Load Balancer?
What Can I Do If ELB Can't Be Accessed or Traffic Routing is Interrupted?
How Can I Handle Abnormal Status Codes?
How Do I Handle Abnormal Request Headers?
How Do I Check for Traffic Inconsistencies?
Why Does ELB Fail to Distribute Traffic Evenly?
How Do I Check If There Is Excessive Access Delay?
What Do I Do If a Load Balancer Fails a Stress Test?
How Do I Check If Sticky Sessions Failed to Take Effect?
How Do I Check SSL/TLS Authentication Errors?
Health Checks
How Do I Troubleshoot an Unhealthy Backend Server of a Dedicated Load Balancer?
How Do I Troubleshoot an Unhealthy Backend Server of a Shared Load Balancer?
Why Is the Interval at Which Backend Servers Receive Health Check Packets Different from the Configured Interval?
How Does ELB Perform UDP Health Checks? What Are the Precautions for UDP Health Checks?
Why Does ELB Frequently Send Requests to Backend Servers During Health Checks?
When Does a Health Check Start?
What Do I Do If a Lot of Access Logs Are Generated During Health Checks?
What Status Codes Will Be Returned If Backend Servers Are Identified as Healthy?
ELB Functionality
Can Load Balancers Be Used Separately?
Can ELB Block DDoS Attacks and Secure Web Code?
Can Backend Servers of a Load Balancer Run Different OSs?
Can ELB Be Used Across Accounts or VPCs?
Can a Backend Server Access Its Load Balancer?
Can Both the Listener and Backend Server Group Use HTTPS?
Does ELB Support IPv6 Networks?
How Do I Determine the Server Response Time Based on Monitoring Data and Logs?
How Can I Transfer the IP Address of a Client?
What Are the Differences Between Persistent Connections and Sticky Sessions?
How Do I Test Sticky Sessions Using Linux Curl Commands?
Load Balancers
How Does ELB Distribute Traffic?
How Can I Configure Load Balancing for Containerized Applications?
Why Are Multiple IP Addresses Required When I Create a Dedicated Load Balancer?
Can Backend Servers Access the Internet Using the EIP of the Load Balancer?
What Is the Difference Between the Bandwidth Defined in Each Specification of a Dedicated Load Balancer and the Bandwidth of an EIP?
How Do I Combine ELB and WAF?
Can I Unbind an IPv6 Address from a Dedicated Load Balancer?
Listeners
What HTTP Headers Can I Configure for an HTTP and HTTP Listener?
Will ELB Stop Distributing Traffic Immediately After a Listener Is Deleted?
Does ELB Have Restrictions on the File Upload Speed and Size?
Can Multiple Load Balancers Route Requests to One Backend Server?
How Is WebSocket Used?
What Are the Three Timeouts of a Listener?
Why Can't I Select the Target Backend Server Group When Adding or Modifying a Listener?
Why Is There a Security Warning After a Certificate Is Configured for an HTTPS Listener?
Why Is a Forwarding Policy in the Faulty State?
Backend Servers
How Load Balancing Algorithms and Sticky Session Type of a Backend Server Group Are Related?
Can Backend Servers Access the Internet After They Are Associated with a Load Balancer?
Can ELB Distribute Traffic Across Servers That Are Not Provided by Huawei Cloud?
Why Are Backend Servers Frequently Accessed by IP Addresses in 100.125.0.0/16?
Can ELB Route Traffic Across Regions?
Does Each Backend Server Need an EIP to Receive Requests from a Public Network Load Balancer?
How Do I Check the Network Conditions of a Backend Server?
How Can I Check the Network Configuration of a Backend Server?
How Do I Check the Status of a Backend Server?
How Do I Check Whether a Backend Server Can Be Accessed Through an EIP?
Why Is the Number of Active Connections Monitored by Cloud Eye Different from the Number of Connections Established with the Backend Servers?
Why Can I Access Backend Servers After a Whitelist Is Configured?
When Will the Changes to Server Weights Be Applied?
Security
Does ELB Support Wildcard Certificates?
Why Is Access to Backend Servers Still Abnormal Even If I Have Created a Certificate?
Will the Network or Load Balancing Be Interrupted When a Certificate Is Being Replaced?
Why Is the Outgoing Rate on the ELB Console Inconsistent with the Bandwidth Usage Statistics on the Cloud Eye Console?
What Are the Differences Between Layer-7 Status Codes and Backend Status Codes in ELB Metrics?
Why Is There a Large Number of HTTP 499 Errors?
Billing
When Do I Need Public Bandwidth for ELB?
Will I Be Billed for Both the Bandwidth Used by the Load Balancer and the Bandwidth Used by Backend Servers?
Can I Modify the Bandwidth of a Load Balancer?
What Functions Will Become Unavailable If a Load Balancer Is Frozen?
Videos