create-http-lb

creates a load balancer

Synopsis

create-http-lb [--help] --devicehost device_host_or_IP_address --deviceport device_port 
[--sslproxyhost proxy_host] 
[--sslproxyport proxy_port] [--target target] [--lbpolicy lbpolicy] [--lbpolicymodule lb_policy_module] [--healthcheckerurl url]
[--healthcheckerinterval 10] [--healthcheckertimeout 10]
[--lbenableallinstances=true] [--lbenableallapplications=true] [--lbweight instance=weight[:instance=weight]*] [--responsetimeout 60] [--httpsrouting=false] [--reloadinterval60][--monitor=false][--routecookie=true] 
[--property (name=value)[:name=value]*
] load_balancer_name

Description

Use the create-http-lb subcommand to create a load balancer, including the load balancer configuration, target reference, and health checker. A load balancer is a representation of the actual load balancer device, defined by its device host and port information. Once you've created the load balancer, you can automatically apply changes made to the load balancer configuration without running export-http-lb-config and manually copying the generated load balancer configuration file to the web server instance.

Options

--help

-?

Displays the help text for the subcommand.

--devicehost

The device host or the IP address of the load balancing device. This host or IP is where the physical load balancer will reside.

--deviceport

The port used to communicate with the load balancing device. It must be SSL enabled.

--sslproxyhost

The proxy host used for outbound HTTP.

--sslproxyport

The proxy port used for outbound HTTP.

--target

Specifies the target to which the load balancer applies.

Valid values are:

• cluster_name- Specifies that requests for this cluster will be handled by the load balancer.

• stand-alone_instance_name- Specifies that requests for this stand-alone instance will be handled by the load balancer.

--lbpolicy

The policy the load balancer follows to distribute load to the server instances in a cluster. Valid values are round-robin, weighted-round-robin, and user-defined. If you choose user-defined, specify a load balancer policy module with the lbpolicymodule option. If you choose weighted-round-robin, assign weights to the server instances using the configure-lb-weight subcommand. The default is round-robin.

--lbpolicymodule

If your target is a cluster and the load balancer policy is user-defined, use this option to specify the full path and name of the shared library of your load balancing policy module. The shared library needs to be in a location accessible by the web server.

--healthcheckerurl

The URL to ping to determine whether the instance is healthy.

--healthcheckerinterval

The interval in seconds the health checker waits between checks of an unhealthy instance to see whether it has become healthy. The default value is 10 seconds. A value of 0 disables the health checker.

--healthcheckertimeout

The interval in seconds the health checker waits to receive a response from an instance. If the health checker has not received a response in this interval, the instance is considered unhealthy. The default value is 10 seconds.

--lbenableallinstances

Enables all instances in the target cluster for load balancing. If the target is a server instance, enables that instance for load balancing.

--lbenableallapplications

Enables all applications deployed to the target cluster or instance for load balancing.

--lbweight

The name of the instance and the weight you are assigning it. The weight must be an integer. The pairs of instances and weights are separated by colons. For example instance1=1:instance2=4 means that for every five requests, one goes to instance1 and four go to instance2. A weight of 1 is the default.

--responsetimeout

The time in seconds within which a server instance must return a response. If no response is received within the time period, the server is considered unhealthy. If set to a positive number, and the request is idempotent, the request is retried. If the request is not idempotent, an error page is returned. If set to 0 no timeout is used. The default is 60.

--httpsrouting

If set to true, HTTPS requests to the load balancer result in HTTPS requests to the server instance. If set to false, HTTPS requests to the load balancer result in HTTP requests to the server instance. The default is false.

--reloadinterval

The time, in seconds, that the load balancer takes to check for an updated configuration. When detected, the configuration file is reloaded. The default value is 60 seconds. A value of 0 disables reloading.

--monitor

If set to true, monitoring of the load balancer is switched on. The default value is false.

--routecookie

This option is deprecated. The value is always true.

--property

Optional attribute name/value pairs for configuring the load balancer.

Operands

lb_name

The name of the new load balancer. This name must not conflict with any other load balancers in the domain.

Examples

Example 1   Creating a Load Balancer

This example creates a load balancer named mylb.

asadmin> create-http-lb 
--devicehost host1 --deviceport 5555 mylb

Command create-http-lb executed successfully.

Exit Status

0

subcommand executed successfully

1

error in executing the subcommand

See Also

delete-http-lb(1), list-http-lbs(1), create-http-lb-config(1)

asadmin(1M)