gtm monitor http
gtm monitor http(1) BIG-IP TMSH Manual gtm monitor http(1)
NAME
http - Configures a Hypertext Transfer Protocol (HTTP) monitor.
MODULE
gtm monitor
SYNTAX
Configure the http component within the gtm monitor module using the syntax in the following sections.
CREATE/MODIFY
create http [name]
modify http [name]
options:
defaults-from [name]
description [string]
destination [ [ ipv4 address[:port] ] | [ ipv6 address[.port] ] ]
ignore-down-response [enabled | disabled]
interval [integer]
password [none | [password] ]
probe-timeout [integer]
recv [none | [string] ]
recv-status-code [none | [string] ]
reverse [enabled | disabled]
send [none | [string] ]
timeout [integer]
transparent [enabled | disabled]
username [ [name] | none]
edit http [ [ [name] | [glob] | [regex] ] ... ]
options:
all-properties
non-default-properties
DISPLAY
list http
list http [ [ [name] | [glob] | [regex] ] ... ]
show running-config http
show running-config http [ [ [name] | [glob] | [regex] ] ... ]
options:
all-properties
non-default-properties
one-line
partition
DELETE
delete http [name]
Note: You cannot delete default monitors.
DESCRIPTION
You can use the http component to configure a custom monitor, or you can use the default HTTP monitor that the
Global Traffic Manager provides. This type of monitor verifies the HTTP service by attempting to receive
specific content from a Web page.
EXAMPLES
create http my_http defaults-from http
Creates a monitor named my_http that inherits properties from the default HTTP monitor.
list http
Displays the properties of all of the HTTP monitors.
OPTIONS
defaults-from
Specifies the name of the monitor from which you want your custom monitor to inherit settings. The
default value is http.
description
User defined description.
destination
Specifies the IP address and service port of the resource that is the destination of this monitor. The
default value is *:*.
Possible values are:
*:* Specifies to perform a health check on the IP address and port supplied by a pool member.
*:port
Specifies to perform a health check on the server with the IP address supplied by the pool member
and the port you specify.
IP address:port
Specifies to mark a pool member up or down based on the response of the server at the IP address and
port you specify.
IP address:port (with the transparent option enabled)
Specifies to perform a health check on the server at the IP address and port specified in the
monitor, routing the check through the IP address and port supplied by the pool member. The pool
member (the gateway) is marked up or down accordingly.
glob Displays the items that match the glob expression. See help glob for a description of glob expression
syntax.
ignore-down-response
Specifies whether the monitor ignores a down response from the system it is monitoring. The default value
is disabled.
interval
Specifies the frequency at which the system issues the monitor check. The default value is 30 seconds.
name Specifies a unique name for the component. This option is required for the commands create, delete, and
modify.
partition
Displays the administrative partition within which the component resides.
password
Specifies the password if the monitored target requires authentication. The default value is none.
probe-timeout
Specifies the number of seconds after which the BIG-IP(r) system times out the probe request to the BIG-
IP system. The default value is 5 seconds.
recv Specifies the text string that the monitor looks for in the returned resource. The default value is none.
The most common receive expressions contain a text string that is included in an HTML file on your site.
The text string can be regular text, HTML tags, or image names, and the associated operation is not case-
sensitive. If you do not specify a value for both the send and recv options, the monitor performs a
simple service check and connect only.
recv-status-code
Specifies the status codes that the monitor looks for in the returned resource. The default value is
none.
The status code can be a number within the range 100-999. Multiple values can be specified in a space
separated, quoted string like "200 300". User can also specify wildcard values like "2XX 4xx 300". If you
do not specify a value for send, recv and recv-status-code options, the monitor performs a simple service
check and connect only.
regex
Displays the items that match the regular expression. The regular expression must be preceded by an at
sign (@[regular expression]) to indicate that the identifier is a regular expression. See help regex for
a description of regular expression syntax.
reverse
Specifies whether the monitor operates in reverse mode. When the monitor is in reverse mode, a successful
check marks the monitored object down instead of up. You can use the this mode only if you configure both
the send and recv options.
The default value is disabled, which specifies that the monitor does not operate in reverse mode. The
enabled value specifies that the monitor operates in reverse mode.
send Specifies the text string that the monitor sends to the target object.
The default setting is GET /, which retrieves a default HTML file for a web site. To retrieve a specific
page from a web site, specify a fully-qualified path name, for example, GET /www/company/index.html.
Since the string may have special characters, the system may require that the string be enclosed with
single quotation marks.
If this value is null, then a valid connection suffices to determine that the service is up. In this
case, the system does not need the recv option and ignores the option even if not null.
timeout
Specifies the number of seconds the target has in which to respond to the monitor request. The default
value is 120 seconds.
If the target responds within the set time period, it is considered up. If the target does not respond
within the set time period, it is considered down. Also, if the target responds with a RESET packet, the
system immediately flags the target as down without waiting for the timeout interval to expire.
transparent
Specifies whether the monitor operates in transparent mode. Monitors in transparent mode can monitor pool
members through firewalls. The default value is disabled.
username
Specifies the username, if the monitored target requires authentication. The default value is none.
SEE ALSO
create, delete, gtm pool, gtm server, list, modify, show, tmsh
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BIG-IP 2019-08-29 gtm monitor http(1)