Document Center

    Server Load Balancer

    • Announcements and Updates
      • Release notes
      • Announcement on optimization for Cloud Monitor
      • Billing rule adjustment for the minimum specification of guaranteed-performance SLB instances
      • [Phase-out announcement] Internal SLB instances of classic network type are phased out starting November 27, 2020
      • Announcement
    • Classic Load Balancer
      • Product Introduction
        • What is SLB?
        • High availability
        • Architecture
        • Features
        • Scenarios
        • Terms
      • Quick Start (New Console)
        • Overview
        • Before you begin
        • Create an SLB instance
        • Configure an SLB instance
        • Resolve a domain name
        • Release an SLB instance
      • CLB Pricing
        • Overdue payments
        • Monitoring data and billing data
        • SLB billing FAQ
        • Pay-as-you-go
      • User Guide
        • Instance
          • SLB instance overview
          • Network traffic flow
          • Create an SLB instance
          • Create an IPv6 instance
          • Start or stop an SLB instance
          • Associate an EIP with an SLB instance
          • Tags
            • Tag overview
            • Add tags
            • Query SLB instances by tag
            • Remove tags
          • Enable deletion protection
          • Release an SLB instance
          • Expired Instances
          • Check the health status of SLB instances
          • Manage idle instances
          • FAQ
            • FAQ about SLB instances
            • Guaranteed-performance instance FAQ
        • Listeners
          • Listener overview
          • Add a TCP listener
          • Add a UDP listener
          • Add an HTTP listener
          • Add an HTTPS listener
          • Domain name extensions
            • Manage a domain name extension
            • Add an additional certificate
            • Edit an additional certificate
            • Delete an additional certificate
          • Manage TLS security policies
          • Redirect HTTP requests to HTTPS
          • FAQ
            • FAQ about SLB
            • FAQ about Layer 7 listeners that use HTTPS or HTTP
        • Backend servers
          • Backend server overview
          • Default server groups
            • Add ECS instances to the default server group
            • Change the weight of a backend server
            • Remove a backend server
          • VServer groups
            • Modify a VServer group
            • Add ECS instances to a VServer group
            • Delete a VServer group
          • Active/standby server groups
            • Delete a primary/secondary server group
            • Add ECS instances to a primary/secondary server group
          • Add private IP addresses of ENIs to backend servers
          • Backend server FAQ
        • Health check
          • Health check overview
          • Configure health checks
          • Perform health check diagnostics
          • Health check FAQ
        • Certificate management
          • Certificate requirements
          • Create a certificate
            • Certificate overview
            • Select a certificate from Alibaba Cloud SSL Certificates Service
            • Upload a third-party certificate
          • Generate a CA certificate
          • Convert the certificate format
          • Replace a certificate
          • Replace multiple certificates
        • Access control
          • Overview
          • Access control lists
            • Create an access control list
            • Add IP entries
            • Delete IP entries
          • Enable access control
          • Disable access control
          • Migrate to the new access control
        • Limits
          • Limits
          • Peak bandwidth limits
          • Manage quotas
        • Common Configurations
          • Implement cross-region load balancing by using Global Traffic Manager
          • WebSocket and WebSocket Secure support FAQ
          • Peak bandwidth limit
          • Anti-DDoS Basic
          • API Inspector
          • Multi-zone deployment
        • Monitoring
          • Monitoring and alerting metrics
          • Monitoring
            • View monitoring data in the console
            • View monitoring data by calling API operations
            • View monitoring data through the SDK
          • Alerting
            • Set alert rules in the Cloud Monitor console
            • Set alert rules by calling the Cloud Monitor API
            • Set alert rules by using Cloud Monitor SDKs
        • Log management
          • View operation logs
          • Health check logs
            • Download health check logs
            • Store health check logs
            • View health check logs
          • Access logs
            • Overview of access logs
            • Configure access logging
            • Authorize a RAM user to use access logs
      • User Guide
        • Developer Guide
          • List of operations by function
          • HTTP Requests
            • Overview
            • Request syntax
            • Response
            • Common parameters
            • Request signatures
          • Obtain an AccessKey pair
          • Authorize a RAM user
          • Server Load Balancer (SLB) instances
            • CreateLoadBalancer
            • DeleteLoadBalancer
            • ModifyLoadBalancerInstanceSpec
            • DescribeZones
            • DescribeRegions
            • DescribeLoadBalancerAttribute
            • DescribeLoadBalancers
            • SetLoadBalancerName
            • SetLoadBalancerStatus
            • ModifyLoadBalancerInternetSpec
            • SetLoadBalancerDeleteProtection
            • SetLoadBalancerModificationProtection
          • UDP listeners
            • CreateLoadBalancerUDPListener
            • SetLoadBalancerUDPListenerAttribute
          • TCP listeners
            • SetLoadBalancerTCPListenerAttribute
            • DescribeLoadBalancerTCPListenerAttribute
            • CreateLoadBalancerTCPListener
          • HTTP listeners
            • DescribeLoadBalancerHTTPListenerAttribute
            • SetLoadBalancerHTTPListenerAttribute
            • CreateLoadBalancerHTTPListener
          • HTTPS listeners
            • CreateLoadBalancerHTTPSListener
            • DescribeLoadBalancerHTTPSListenerAttribute
            • SetLoadBalancerHTTPSListenerAttribute
          • Listeners
            • StartLoadBalancerListener
            • StopLoadBalancerListener
            • DeleteLoadBalancerListener
          • Backend servers
            • AddBackendServers
            • RemoveBackendServers
            • SetBackendServers
            • DescribeHealthStatus
          • VServer groups
            • CreateVServerGroup
            • SetVServerGroupAttribute
            • AddVServerGroupBackendServers
            • RemoveVServerGroupBackendServers
            • ModifyVServerGroupBackendServers
            • DeleteVServerGroup
            • DescribeVServerGroups
            • DescribeVServerGroupAttribute
          • Active/standby server groups
            • DescribeMasterSlaveServerGroups
            • DescribeMasterSlaveServerGroupAttribute
            • CreateMasterSlaveServerGroup
            • DeleteMasterSlaveServerGroup
          • Server certificates
            • UploadServerCertificate
            • DeleteServerCertificate
            • DescribeServerCertificates
            • SetServerCertificateName
            • UploadCACertificate
            • DeleteCACertificate
            • DescribeCACertificates
            • SetCACertificateName
          • TLS policies
            • CreateTLSCipherPolicy
            • DeleteTLSCipherPolicy
            • ListTLSCipherPolicies
            • SetTLSCipherPolicyAttribute
          • Domain name extensions (Beta)
            • DescribeDomainExtensionAttribute
            • CreateDomainExtension
            • SetDomainExtensionAttribute
            • DescribeDomainExtensions
            • DeleteDomainExtension
          • Quota query
            • DescribeAvailableResource
          • Tags
            • ListTagResources
            • UntagResources
            • TagResources
          • Forwarding rules
            • CreateRules
            • DeleteRules
            • SetRule
            • DescribeRuleAttribute
            • DescribeRules
          • Access control
            • CreateAccessControlList
            • DeleteAccessControlList
            • DescribeAccessControlLists
            • DescribeAccessControlListAttribute
            • SetAccessControlListAttribute
            • AddAccessControlListEntry
            • RemoveAccessControlListEntry
          • Access control (earlier version)
            • AddListenerWhiteListItem
            • DescribeListenerAccessControlAttribute
            • RemoveListenerWhiteListItem
            • SetListenerAccessControlStatus
          • Common error codes
        • SDK Guide
          • Download the SLB SDK
          • Alibaba Cloud SDK for Python code examples
            • Install Alibaba Cloud SDK for Python
            • Preparations
            • Create an SLB instance and then delete the SLB instance
            • Create a TCP listener
            • Update SSL certificates
            • View monitoring data
            • Clone an SLB instance
      • FAQ
        • Why am I unable to access an SLB instance?
        • Why are requests unbalanced among ECS instances?
        • What can I do if health checks generate an excessive number of logs?
        • What can I do if my ECS instance is declared unhealthy after I enable health checks for Server Load Balancer?
        • How do I troubleshoot health check exceptions of a layer-4 (TCP/UDP) listener?
        • How do I troubleshoot a health check exception of a Layer 7 listener (HTTP/HTTPS)?
        • How do I troubleshoot HTTP 5xx errors?
        • Configure cookie in the backend server
        • Session persistence FAQ
    • Tutorials
      • Add an HTTPS listener (one-way authentication)
      • Configure an HTTPS listener (mutual authentication)
      • Redirect HTTP requests to HTTPS
      • Configure a multi-domain-name HTTPS website on an SLB instance
      • Forward requests based on domain names or URLs
      • Forward requests from the same domain name but different URLs
      • How do I obtain real IP addresses of clients?
      • Perform a stress test
      • Use access logs to find unhealthy backend servers
      • Specify an IP address for an SLB instance by using OpenAPI Explorer
      • View traffic usage
    • FAQ & Troubleshooting
    • General Reference
      • Guidelines for the use of documentation
        • Alibaba Cloud documentation
        • Instructions for open source documentation
          • Open-Source Documentation Code of Conduct
          • Editing Open-Source Documentation
      • Alibaba Cloud console
      • Regions and zones
      • Service limits
      • Create an AccessKey pair
      • ICP Filing
      • Glossary
 

This Product

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    Server Load Balancer

    Server Load Balancer

    All Products
      • Announcements and Updates

        • Release notes
        • Announcement on optimization for Cloud Monitor
        • Billing rule adjustment for the minimum specification of guaranteed-performance SLB instances
        • [Phase-out announcement] Internal SLB instances of classic network type are phased out starting November 27, 2020
        • Announcement
        Show more
        Show less
      • Classic Load Balancer

        • Product Introduction
        • Quick Start (New Console)
        • CLB Pricing
        • User Guide
        • User Guide
        • FAQ
        Show more
        Show less
      • Tutorials

        • Add an HTTPS listener (one-way authentication)
        • Configure an HTTPS listener (mutual authentication)
        • Redirect HTTP requests to HTTPS
        • Configure a multi-domain-name HTTPS website on an SLB instance
        • Forward requests based on domain names or URLs
        • Forward requests from the same domain name but different URLs
        • How do I obtain real IP addresses of clients?
        • Perform a stress test
        • Use access logs to find unhealthy backend servers
        • Specify an IP address for an SLB instance by using OpenAPI Explorer
        • View traffic usage
        Show more
        Show less
      • FAQ & Troubleshooting

        • FAQ & Troubleshooting
        Show more
        Show less
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