HAProxy Enterprise

Table of contents for the HAProxy Enterprise 2.2r1 documentation.

• Release Notes
  View the release notes for HAProxy Enterprise
• Getting Started
  Learn how to get up and running using HAProxy Enterprise.
  • Overview
    Get an overview of load balancing with HAProxy Enterprise.
  • Hardware Recommendations
    Check the hardware recommendations to optimize your server for the workload it will manage.
  • System Tuning
    Learn ways to tune your system to get the best performance.
  • Installation
    Choose how you want to install HAProxy Enterprise.
    • Amazon Web Services
      Deploy HAProxy Enterprise in AWS.
      • Overview
        Get an overview of how HAProxy Enterprise operates in AWS.
      • Launch the AMI
        Deploy HAProxy Enterprise in an Amazon Virtual Private Cloud.
      • Manage the service
        Start, stop and reload the HAProxy Enterprise service in AWS.
      • Access the dashboard
        Use the HAProxy Enterprise Real-time Dashboard in AWS.
      • Tutorial: Deploy in a VPC
        Deploy HAProxy Enterprise in an Amazon Virtual Private Cloud.
      • Get support
        Learn about available support resources when using HAProxy Enterprise in AWS.
    • Azure
      Launch HAProxy Enterprise directly from the Azure Marketplace.
    • BSD
      Install HAProxy Enterprise on BSD.
    • Docker
      Run HAProxy Enterprise as a Docker container.
    • Kubernetes
    • Linux
      Install HAProxy Enterprise on Linux.
  • Additional Packages
    Install additional packages available for your load balancer.
  • Upgrade
    Upgrade from an older version to this version of HAProxy Enterprise.
    • Amazon Web Services
      Upgrade to the latest version of HAProxy Enterprise deployed in AWS via AMI
    • Linux
      Upgrade HAProxy Enterprise on Linux.
    • BSD
      Upgrade HAProxy Enterprise on BSD.
    • Docker
      Upgrade HAProxy Enterprise as a Docker container.
    • Community to Enterprise
      Upgrade from the community version of HAProxy to HAProxy Enterprise.
  • Uninstall
    Uninstall HAProxy Enterprise.
    • BSD
      Remove HAProxy Enterprise from BSD.
    • Linux
      Uninstall HAProxy Enterprise from Linux.
    • Docker
      Uninstall HAProxy Enterprise from Docker.
• Configuration
  Learn the basics of configuring HAProxy Enterprise.
  • Configuration Section Basics
    Learn about the sections of an HAProxy Enterprise configuration file.
    • Overview
      Get an overview of how an HAProxy Enterprise configuration is composed.
    • Global
      Define process-level directives and global configuration settings.
    • Frontend
      Accept incoming connections and forward them to defined backends.
    • Backend
      Define server pools to service incoming requests.
    • Listen
      Define a complete proxy with the functions of a frontend and backend combined.
    • Defaults
      Set inheritable directive defaults for other sections.
    • Userlist
      Configure authentication and restrict access to proxied services.
    • Cache
      Enable in-memory response caching for backend servers.
    • Http-errors
      Configure custom error pages to return to clients.
    • Mailers
      Define message transfer agent (MTA) servers to forward error messages.
    • Resolvers
      Add DNS nameservers to resolve hostnames.
    • Fcgi-app
      Define how HAProxy Enterprise should connect to a FastCGI application.
    • Peers
      Enable the replication of stick table data between HAProxy Enterprise nodes.
    • Aggregations
      Combine stick table data from multiple HAProxy Enterprise nodes.
    • Program
      Enable the HAProxy Process Manager to start external programs.
    • Dynamic-update
      Pull updated ACL and Map files from a remote server.
    • Ring
      Create an in-memory buffer for log messages before forwarding them to a remote log server.
  • Binds
    Bind IP addresses and receive traffic on your load balancer.
    • Overview
      Get an overview of how to bind IP addresses to receive traffic.
    • Syntax
      Learn the bind directive's syntax.
    • Bind Reference
  • Servers
    Add servers to your load balancer backends.
    • Overview
      Get an overview of how to add servers to your configuration.
    • Syntax
      Learn the syntax of the server directive.
    • Server Reference
  • Fetches
    Extract information from the traffic as it passes through the load balancer.
    • Overview
      Get an overview of how to use fetches to extract information from requests.
    • Syntax
      Learn the fetch method syntax.
    • Fetch Reference
  • ACLs
    Use ACLs statements to control traffic and transform messages.
    • Overview
      Get an overview of ACLs in HAProxy Enterprise.
    • Syntax
      Learn how an ACL is structured.
    • ACL Examples
      Examples of ACL use-cases in HAProxy Enterprise.
    • Inline ACLs
      Declare ACLs inline.
    • Predefined ACLs
      Use predefined ACLs in your configuration.
    • ACL Reference
  • Converters
    Convert or transform the value of a fetch to another type.
    • Overview
      Transform the value of a fetch.
    • Converter Reference
  • Map Files
    Map keys to values to simplify complicated configuration files.
    • Overview
      Get an overview of Map files.
    • Syntax
      Learn the Map file syntax.
  • Stick Tables
    Store data about traffic as it passes through the load balancer.
    • Overview
      Get an overview of how to use stick tables.
    • Syntax
      Learn the syntax of stick table directives.
    • Stick Table Reference
  • Variables
    Learn how variables let you store pieces of data.
    • Overview
      Get an overview of how to use variables in HAProxy Enterprise.
    • Syntax
      Learn the syntax of variables in HAProxy Enterprise.
    • Environment variables
      Read environment variables at startup.
  • Reference Manual
• Management
  Manage, update, and monitor HAProxy Enterprise.
  • Start/Stop the Service
    Start and stop the HAProxy Enterprise service.
  • Start with split configuration files
    Start and stop the HAProxy Enterprise service with split configuration files.
  • Enable/Disable Servers
    Enable and disable backend servers.
  • Git Integration
    Integrate HAProxy Enterprise with git using the Data Plane API.
  • Dynamic Data Updates
    Update the contents of ACL files, Map files, and TLS ticket key files periodically without reloading HAProxy Enterprise.
    • Installation
      Install the HAProxy Enterprise Update module.
    • TLS session ticket keys
      Update TLS session ticket keys via the Update module.
    • Update Module Reference
      View the Update Module Reference.
    • Update Module Runtime API
      Update Modulee Runtime API Command Examples
  • Real-time Dashboard
    Enable the HAProxy Enterprise Real-time Dashboard.
    • Installation
      Install the HAProxy Enterprise Real-time Dashboard.
    • Lua Module
      Use the Lua Module to feed data to the Real-time Dashboard.
    • Dashboard Gateway
      Use the Dashboard Gateway to feed data to the Real-time Dashboard.
    • Using the Dashboard
      Learn how to use the HAProxy Enterprise Real-time Dashboard.
  • Process Manager
    Use the HAProxy Enterprise Process Manager to run external programs.
  • Service Discovery
    Enable service discovery in HAProxy Enterprise.
    • AWS EC2 Service Discovery
      Enable service discovery in HAProxy Enterprise with AWS EC2.
    • Consul Service Discovery
      Enable service discovery in HAProxy Enterprise with Consul.
    • DNS Service Discovery
      Enable service discovery in HAProxy Enterprise using DNS records.
      • Discovery with A Records
        Enable service discovery in HAProxy Enterprise using DNS A records.
      • Discovery with SRV Records
        Enable service discovery in HAProxy Enterprise using DNS SRV records.
  • Multi-threading
    Configuring multi-threading in HAProxy Enterprise.
  • Ansible
    Integrate HAProxy Enterprise with Ansible.
• High Availability
  Configure HAProxy Enterprise for high availability.
  • Active/Active Clustering
    Configure a highly available cluster of HAProxy Enterprise load balancers.
    • Layer 4 Load Balancing
      Configure an active-active cluster of load balancers by using a second tier of load balancers.
    • DNS Round-robin
      Use DNS round-robin to distribute traffic to an active-active cluster of load balancers.
    • Route Health Injection
      Use RHI to control routing protocol announcement based on the health of the network in an active-active cluster.
    • Real-time Cluster-wide Tracking
      Track client behavior across a cluster of active-active HAProxy Enterprise load balancers.
      • Overview
        Get an overview of the HAProxy Enterprise Stick Table Aggregator.
      • Installation
        Install the Stick Table Aggregator for HAProxy Enterprise.
      • Single-level setup
        Set up a single-level, highly available cluster.
      • Multi-level setup
        Set up a multi-level, highly available cluster.
      • Highly-available setup
        Set up a cluster of Stick Table Aggregators configured for high-availability.
      • Display aggregated data
        Show a table of all aggregated data.
      • Configure CPU affinity
        Configure the CPU affinity of the Stick Table Aggregator processes.
      • Bind outgoing connections
        Bind the aggregator's outgoing connections to a specific socket address.
      • Encrypt traffic
        Implement mutual TLS/SSL authentication and encrypt traffic between HAProxy Enterprise nodes and the Stick Table Aggregator.
      • Manage the service
        Manage the Stick Table Aggregator service.
      • Troubleshooting
        Get troubleshooting information from the HAProxy Enterprise nodes.
    • Load Shedding with NS1
      Use NS1 Load Shedding to direct traffic to the geographically closest load balancer.
  • Active/Standby Clustering
    Serve traffic from one load balancer node while the others are on standby.
  • AWS
    Configure HAProxy Enterprise for high availability in AWS.
    • Network Load Balancer
      Configure an active-active cluster of HAProxy Enterprise load balancers by using AWS NLB.
• Load Balancing
  Learn about HAProxy Enterprise load-balancing features.
  • Caching
    Enable caching of server responses.
  • Compression
    Compress responses from servers.
  • Device Detection
    Enable device detection in HAProxy Enterprise.
    • 51Degrees
      Enable device detection in HAProxy Enterprise using 51Degrees.
    • DeviceAtlas
      Enable device detection in HAProxy Enterprise using DeviceAtlas.
    • WURFL InFuze
      Enable device detection in HAProxy Enterprise using ScientiaMobile InFuze.
  • Geolocation
    Enable geolocation in HAProxy Enterprise.
    • MaxMind
      Enable geolocation in HAProxy Enterprise using MaxMind.
    • NetAcuity
      Enable geolocation in HAProxy Enterprise using Digital Element.
  • Service Mesh
    Deploy HAProxy Enterprise as the proxy layer in a service mesh.
    • Consul
      Deploy HAProxy Enterprise as the proxy layer in a Consul service mesh.
  • Protocols
    Load balancing traffic over various network-layer and application-layer protocols.
    • FastCGI
      Load balance FastCGI applications.
    • gRPC
      Load balance gRPC applications.
    • HTTP/2
      Load balance HTTP/2 requests.
    • TCP
      Load balance TCP/IP traffic.
    • WebSocket
      Load balance WebSocket connections.
  • Client IP preservation
    Preserve the client's source IP address when proxying traffic.
    • Add an X-Forwarded-For header
      Preserve the client's source IP address by adding an X-Forwarded-For header.
    • Enable the Proxy Protocol
      Preserve the client's source IP address by enabling the Proxy Protocol.
  • Response Body Injection
    Insert content dynamically into an HTTP response.
  • Session Persistence
    Route clients to the same backend server with session persistence.
  • Traffic Mirroring
    Replicate traffic to a shadow environment.
    • Overview
      Traffic mirroring benefits and impact.
    • Configure Traffic Mirroring
      Configure the Load Balancer to send traffic to the mirroring agent.
    • Tuning Mirrored Traffic
      Tune traffic by filtering, sampling, mapping key-value pairs, or making runtime changes using the REST API.
    • Troubleshooting Traffic Mirroring
      Troubleshoot mirrored traffic implementation.
    • Traffic Mirroring Reference
      Review arguments for the SPOE configuration file.
  • Traffic Policing
    Set rate limits that cause requests to be denied.
    • Queue connections to servers
      Queue connection requests instead of dropping them.
    • Limit HTTP requests per day
      How to limit a user's HTTP request count per fixed period of time.
    • Rate limit HTTP requests
      How to limit a user's HTTP request rate measured across a moving time period.
    • Rate limit HTTP requests by URL
      How to control HTTP traffic based on the URL.
    • Rate limit HTTP requests by URL parameter
      How to control HTTP traffic based on a URL parameter.
• Traffic Routing
  Change the destination of a connection or request before it is relayed to a server.
  • Blue-Green Deployments
    Configure a Blue-Green deployment for your backend servers.
  • Redirects
    Redirect a client to a different destination.
  • Rewrites
    Change the properties of a request or a response on the fly.
    • Rewrite Requests
      Use the http-request configuration directive to rewrite HTTP requests.
    • Rewrite Responses
      Use the http-response configuration directive to rewrite HTTP responses before they are sent back to clients.
• Security
  Configure security features in HAProxy Enterprise.
  • Global Profiling Engine
    Enable the Global Profiling Engine for aggregating real-time and historical stick table data.
    • Overview
      Get an overview of the Global Profiling Engine.
    • Installation
      Install the Global Profiling Engine.
    • Real-time Aggregation
      Configure real-time aggregation of stick table data.
      • Configuration
        Configure real-time aggregation of stick table data.
      • Multi-level setup
        Set up a multi-level, highly available cluster of global profiling engines.
    • Historical Aggregation
      Enable the aggregation and processing of historical statistics.
    • API Reference
      View the Global Profiling Engine API Reference.
  • Single Sign-on
    Log into your applications only once with single sign-on.
    • Active Directory
      Set up SSO on a Microsoft Active Directory domain.
      • Implementing SSO
        Implement single sign-on on HAProxy Enterprise using Active Directory.
      • Configuring SSO
        Configure single sign-on on HAProxy Enterprise using Active Directory.
    • SAML
      Configure single sign-on in HAProxy Enterprise using the SAML protocol.
      • SAML Component Overview
        SAML Component architecture and HTTP workflows.
      • SAML Debugging
        Full debugging in SAML Component.
      • Install for Azure Active Directory
        Get up and running with HAProxy Enterprise single sign-on using SAML on Azure Active Directory.
      • SAML configuration options
        SAML configuration options
  • Response Policies
    Perform actions on suspicious connections or requests.
    • Deny
      Deny a client's HTTP request or a server's response.
    • reCAPTCHA
      Present a Google reCAPTCHA to a user.
      • reCAPTCHA v2
        Set up a dedicated reCAPTCHA page to challenge users.
      • reCAPTCHA v3
        Embed reCAPTCHA on an existing page.
    • Reject
      Reject an HTTP request or TCP connection.
    • Shadowban
      Shadowban a client by sending them to a dummy resource.
    • Silent Drop
      Silently drop a client's HTTP request without notifying the client that the connection has been closed.
    • Tarpit
      Stall a client's request for a period of time before returning an error response.
  • TLS
    Encrypt traffic using SSL/TLS.
  • Authentication
    Enable client authentication in HAProxy Enterprise.
    • Basic Authentication
      Restrict access with HTTP Basic authentication.
    • Client Certificate Authentication
      Restrict access with client certificate authentication.
    • JSON Web Token-Based Authorization
      Password-free authorization using OAuth 2.0 via JSON Web Tokens (JWTs).
      • JSON Web Token Overview
        What's a token and how does it work?
      • Getting a Token
        Sign on with an authentication service so you can get access tokens.
      • Configuring a Proxy for OAuth Authorization
        The proxy configuration allows or denies an HTTP request based on token contents.
  • Bot Management
    Set countermeasures for malicious bots.
    • Fingerprint Module
      Identify client requests or bots, even when they try to modify their client attributes.
    • Javascript Challenge
      Enable and configure the Javascript Challenge to deter bots.
    • SSL/TLS Fingerprint Module
      Identify returning clients using information from their SSL/TLS handshake.
    • Verify Crawler
      Validate legitimate search bots.
  • Handling a DoS attack
    Defend against denial-of-service attacks using HAProxy Enterprise.
  • Web Application Firewall
    Enable the HAProxy Enterprise Web Application Firewall.
    • Advanced WAF
      Use the Advanced WAF for increased protection against web application attacks.
      • Install the Advanced WAF
        Install the Advanced WAF
      • Rule Customization
        Customize the Advanced WAF rules
        • Add a rule
          Add a WAF rule
        • Disable a rule
          Disable a WAF rule completely
        • Set scores for rule violations
          Set how many points each rule violation is worth
      • Enable Advanced WAF logs
        Enable logs for the Advanced WAF
      • WAF filter parameters
        WAF filter parameters Reference
    • ModSecurity
      Configure the ModSecurity web application firewall in HAProxy Enterprise.
      • Installation
        Install the ModSecurity WAF
      • Enable blocking
        Block suspicious requests
      • Customize rules
        Change the ModSecurity rules
      • WAF Logs
        Understand the WAF log format
      • WAF filter parameters
        ModSecurity filter parameters reference
    • SQL Injection/XSS
      Use the HAProxy Enterprise WAF Offloader to block XSS and SQL Injection attacks.
• Observability
  Configure observability features with HAProxy Enterprise.
  • Logging
    Configure logging of load balancer events.
    • Overview
      Get an overview of how HAProxy Enterprise stores and processes logs.
    • Enabling Logging
      How to enable logging in HAProxy Enterprise.
    • Setting Log Levels
      How to set log levels in HAProxy Enterprise.
    • Logging without Waiting for Session Termination
      Log requests when they start, not when they end.
    • Log format for access logs
      Using and customizing HAProxy Enterprise access logs.
    • Log with Docker
      Collect logs when HAProxy Enterprise runs as a Docker container.
    • Logging Reference
  • Metrics
    Enable and collect load balancer metrics.
    • Prometheus
      Integrate HAProxy Enterprise with Prometheus.
    • Send Metrics
      Use the Send Metrics module to send metrics data to an external program.
    • SNMP
      Send metrics data to your network monitoring device using SNMP.
  • Monitoring
    Monitor load balancer health and generate alerts.
    • Alerts
      Set up email alerts about HAProxy Enterprise events.
    • Monitor URI
      Provide external monitoring software with a way to monitor HAProxy Enterprise.
  • Integrations
    Learn how HAProxy Enterprise integrates with third-party software.
    • Grafana
      Integrate HAProxy Enterprise and Grafana.
    • Elastic Stack
      Integrate HAProxy Enterprise and Elastic Stack.
    • InfluxDB
      Integrate HAProxy Enterprise with InfluxDB.
• Service Reliability
  How to handle offline web servers and network problems.
  • Health Checking
    Enable health checks that monitor the status of your servers.
    • Active Health Checks
      Use active health checks to monitor the status of a backend server.
      • TCP Health Checks
        Use a TCP health check to establish a connection to a backend server.
      • HTTP Health Checks
        Send an HTTP request to a backend server.
      • Health Check Interval
        You can change how often health checks are sent.
      • Health Check Threshold
        You can change thresholds that determine whether a server is up or down.
      • Connection Parameters
        Define connection protocols, IP address, and other parameters.
      • Expected Status or String
        Define the return string or status that indicates success.
      • Logging Comments on Failure
        Define comments to be logged upon check failure.
      • Variables
        Set and unset custom variables for use in HTTP and TCP checks.
    • Passive Health Checks
      Use passive health checks to monitor live traffic for errors.
    • Agent Checks
      Use an agent program to check server health.
    • LDAP Health Checks
      Configure health checking of LDAPv3 servers.
    • MySQL Health Checks
      Health check MySQL database servers
    • PostgreSQL Health Checks
      Health check PostgreSQL database servers.
    • Redis Health Checks
      Health check a Redis service.
    • SMTP Health Checks
      Health check a Simple Mail Transfer Protocol (SMTP) service.
  • Retries and Redispatches
    How to handle TCP connection and HTTP request failures.
    • Retry a Failed Connection
      Specify how many times to retry the connection to a server.
    • Retry a Failed HTTP Request
      You can retry an HTTP request based on the failure conditions.
  • Circuit Breakers
    Use a circuit breaker to take proxied microservices off line when they fail.
• API
  Learn how to manage HAProxy Enterprise using its APIs.
  • Command Line Interface
    Manage the HAProxy Enterprise process using its command-line interface.
  • Data Plane API
    Use the Data Plane API to configure the load balancer dynamically.
    • Installation
      Install the Data Plane API.
      • HAProxy Community
        Install the Data Plane API with the community version of HAProxy.
      • HAProxy Enterprise
        Install the Data Plane API with HAProxy Enterprise.
    • CLI
      Learn about the arguments available when starting the Data Plane API.
    • Usage
      See examples of how to use the Data Plane API.
    • Data Plane API Reference
  • Lua
    Extend HAProxy Enterprise using the Lua programming language.
    • Lua scripts
      Getting started with Lua scripts on HAProxy Enterprise.
  • Runtime API
    Use the Runtime API to update the load balancer's configuration in memory without requiring a reload.
    • Overview
      Get an overview of the Runtime API.
    • Installation
      Install and configure the HAProxy Enterprise Runtime API.
    • Tutorials
      See examples of using the Runtime API
      • View help
        See available Runtime API commands.
    • Reference guide
      View Runtime API commands and usage.
      • add acl
        Add a value to an ACL expression or file.
      • add map
        Add an entry to a Map file.
      • add ssl crt-list
        Add an entry to an SSL CRT list.
      • clear acl
        Delete all entries from an ACL expression or file.
      • clear counters all
        Clear all counters on the Stats page.
      • clear counters
        Clear the Max counters on the Stats page.
      • clear map
        Delete all entries from a Map file.
      • clear table
        Remove one or more entries from a stick table.
      • commit acl
        Commit a transaction of acl changes.
      • commit ssl cert
        Commit an SSL certificate transaction.
      • del acl
        Delete a single value from an ACL expression or file.
      • del map
        Delete a single entry from a Map file.
      • del ssl cert
        Delete a single SSL certificate from memory.
      • del ssl crt-list
        Delete an entry from an SSL CRT list.
      • disable agent
        Stop sending health check probes to an agent program running on a server.
      • disable dynamic-cookie backend
        Enable session persistence when dynamic cookies are in use.
      • disable frontend
        Stop routing traffic to a frontend that is declared in your HAProxy Enterprise configuration file.
      • disable health
        Stop sending active health check probes to a server.
      • disable server
        Put a server in maintenance mode.
      • enable agent
        Resume sending health check probes to an agent program running on a server.
      • enable dynamic-cookie backend
        Enable session persistence when dynamic cookies are in use.
      • enable frontend
        Re-enable a frontend that was stopped.
      • enable health
        Enable active health checks for a server.
      • enable server
        Take a server out of maintenance mode.
      • get acl
        Test whether a value would match an ACL.
      • get map
        Test whether an input matches an entry in a map file.
      • get weight
        Display the initial and current weight of a server.
      • help
        Display a list of available Runtime API commands.
      • new ssl cert
        Add a new, empty SSL certificate store.
      • operator
        Decrease the CLI level to operator.
      • prepare acl
        Start a transaction made up of multiple acl changes.
      • prompt
        Initiate an interactive session with the Runtime API.
      • quit
        Disconnect from the Runtime API.
      • set dynamic-cookie-key backend
        Change the value of the dynamic-cookie-key directive.
      • set map
        Change the value of a map file entry.
      • set maxconn frontend
        Change a frontend's maximum concurrent connections.
      • set maxconn global
        Change the load balancer's process-side maximum concurrent connections.
      • set maxconn server
        Change a server's maximum concurrent connections.
      • set profiling
        Enable or disable profiling.
      • set rate-limit connections global
        Set the process-wide connection rate limit.
      • set rate-limit http-compression global
        Set the process-wide compression rate limit.
      • set rate-limit sessions global
        Set the process-wide session rate limit.
      • set rate-limit ssl-sessions global
        Set the process-wide SSL session rate limit.
      • set server
        Change a server's properties.
      • set severity-output
        Change the severity level format.
      • set ssl cert
        Add an SSL certificate to a transaction.
      • set ssl ocsp-response
        Set the Online Certificate Status Protocol (OCSP) response for an SSL/TLS certificate.
      • set ssl tls-key
        Rotate the load balancer's session ticket encryption key used to encrypt TLS session tickets.
      • set table
        Add or update a record in a stick table.
      • set timeout cli
        Change the timeout period for an interactive session with the Runtime API.
      • set weight
        Change the weight of a server.
      • show acl
        List all ACLs defined in the configuration.
      • show activity
        Report counters related to internal process events.
      • show backend
        List all backends in the current running config.
      • show cache
        Show cache status.
      • show cli level
        Display the CLI level of the current session.
      • show cli sockets
        Display information about all CLI sockets defined in the configuration.
      • show env
        Display current HAProxy Enterprise process and environment information.
      • show errors
        Show errors related to protocol violations.
      • show events
        Show events from a running trace.
      • show info
        Display information about the HAProxy Enterprise process.
      • show map
        List map files or list the entries in a map file.
      • show peers
        Display information about stick table data synchronized between load balancer peers.
      • show pools
        Show the status of internal memory pools.
      • show profiling
        Dump profiling details.
      • show resolvers
        Display statistics for each resolvers section in your configuration.
      • show schema json
        Display the JSON schema for the output of the 'show info' and 'show stat' commands.
      • show servers conn
        Dump the current and idle connections for a backend or backends.
      • show servers state
        Get a block of data that represents the current of servers in backends.
      • show sess
        Display all clients that have an ongoing session connected to the load balancer.
      • show ssl cert
        List certificates.
      • show ssl crt-list
        Display the contents of an SSL CRT list.
      • show startup-logs
        Display messages generated during startup.
      • show stat
        Get statistics that describe traffic flowing through the load balancer.
      • show table
        List entries in a stick table.
      • show threads
        Show the internal states and structures of threads.
      • show tls-keys
        Display the secret keys used to encrypt TLS session tickets.
      • show trace
        Display the state and monitored events for a trace.
      • shutdown frontend
        Delete a frontend and release the ports on which it listens.
      • shutdown session
        Terminate a client's session.
      • shutdown sessions server
        Terminate all client sessions that are connected to a specific server.
      • trace
        Monitor load balancer events in real-time using a trace.
      • user
        Decrease the CLI level to user.
• Troubleshooting
  Learn ways to troubleshoot your HAProxy Enterprise load balancer.
  • Contact Us
    See how to contact us for help.
  • Common Questions
    Techniques for troubleshooting common questions and issues.
• Licensing
  Review the HAProxy Enterprise license information.