ltm monitor postgresql
ltm monitor postgresql(1) BIG-IP TMSH Manual ltm monitor postgresql(1)
NAME
postgresql - Configures a PostgreSQL(r) monitor.
MODULE
ltm monitor
SYNTAX
Configure the postgresql component within the ltm monitor module using the syntax in the following sections.
CREATE/MODIFY
create postgresql [name]
modify postgresql [name]
options:
app-service [[string] | none]
count [integer]
database [ [name] | none]
debug [no | yes]
defaults-from [name]
description [string]
destination [ [ ipv4 address[:port] ] | [ ipv6 address[.port] ] ]
interval [integer]
manual-resume [enabled | disabled]
password [none | [password] ]
recv [none | [string] ]
recv-column [none | [string] ]
recv-row [none | [string] ]
send [none | [string] ]
time-until-up [integer]
timeout [integer]
up-interval [integer]
username [[name] | none]
edit postgresql [ [ [name] | [glob] | [regex] ] ... ]
options:
all-properties
non-default-properties
DISPLAY
list postgresql
list postgresql [ [ [name] | [glob] | [regex] ] ... ]
show postgresql [ [ [name] | [glob] | [regex] ] ... ]
show running-config postgresql
show running-config postgresql [ [ [name] | [glob] | [regex] ] ... ]
options:
all-properties
non-default-properties
one-line
partition
test-result
DELETE
delete postgresql [name]
Note: You cannot delete default monitors.
RUN
run postgresql [name] [ destination [ [ ipv4 address[:port] ] | [ ipv6 address[.port] ] ] ]
STOP
stop postgresql [name]
DESCRIPTION
You can use the postgresql component to configure a custom monitor, or you can use the default PostgreSQL monitor that the
Local Traffic Manager provides. This type of monitor verifies PostgreSQL-based services.
You can test a custom monitor configuration against a specified target destination by using the run command, and view the
results of such a test by using the show command with the test-result option.
The following user roles (in addition to the root user) have permissions to run and stop an ltm monitor test:
admin, application-editor, manager, operator, resource-admin
EXAMPLES
create postgresql my_postgresql defaults-from postgresql
Creates a monitor named my_postgresql that inherits properties from the default PostgreSQL monitor.
list postgresql
Displays the properties of all of the PostgreSQL monitors.
run postgresql my_postgresql destination 10.10.10.10:80
Runs a one-shot test of the custom monitor my_postgresql against a target node at 10.10.10.10:80.
stop postgresql my_postgresql
Cancels a one-shot test of the custom monitor my_postgresql in progress.
show postgresql my_postgresql test-result
Displays the result of the most recent one-shot test of the custom monitor my_postgresql.
OPTIONS
app-service
Specifies the name of the application service to which the monitor belongs. The default value is none. Note: If the
strict-updates option is enabled on the application service that owns the object, you cannot modify or delete the
monitor. Only the application service can modify or delete the monitor.
count
Specifies the number of monitor probes after which the connection to the database will be terminated. Count value of
zero indicates that the connection will never be terminated. The default value is zero.
database
Specifies the name of the database with which the monitor attempts to communicate. The default value is none.
debug
Specifies whether the monitor sends error messages and additional information to a log file created and labeled
specifically for this monitor. You can use the log information to help diagnose and troubleshoot unsuccessful health
checks. The default value is no.
The options are:
no Specifies that the system does not redirect error messages and additional information related to this monitor.
yes Specifies that the system redirects error messages and additional information to the
/var/log/monitors/--.log file.
defaults-from
Specifies the name of the monitor from which you want your custom monitor to inherit settings. The default value is
postgresql.
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.
This option is required for the command run, unless an IP address and service port are specified in the destination
option for the specified custom monitor.
glob Displays the items that match the glob expression. See help glob for a description of glob expression syntax.
interval
Specifies, in seconds, the frequency at which the system issues the monitor check when either the resource is down or
the status of the resource is unknown. The default value is 30 seconds.
Important: F5 Networks recommends that when you configure this option and the up-interval option, whichever value is
greater be a multiple of the lesser value to allow for an even distribution of monitor checks among all monitors.
manual-resume
Specifies whether the system automatically changes the status of a resource to up at the next successful monitor
check. The default value of the manual-resume option is disabled.
Note that if you set the manual-resume option to enabled, you must manually mark the resource as up before the system
can use it for load balancing connections.
name Specifies a unique name for the component. This option is required for the commands create, delete, modify, run and
stop.
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.
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 a field in your database. 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-column
Specifies the column in the database where the system expects the specified Receive String to be located. Specify this
option only if you configure the send and recv options. The default value is none.
recv-row
Specifies the row in the database where the system expects the specified Receive String to be located. Specify this
option only if you configure the send and recv options. The default value is none.
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.
send Specifies the SQL query that the monitor sends to the target database, for example, SELECT count(*) FROM mytable.
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.
test-result
Displays the result of the most recent one-shot test of the specified monitor(s), if any such test has been performed
since BIG-IP was started.
time-until-up
Specifies the amount of time, in seconds, after the first successful response before a node is marked up. A value of 0
(zero) causes a node to be marked up immediately after a valid response is received from the node. The default value
is 0 (zero).
timeout
Specifies the number of seconds the target has in which to respond to the monitor request. The default value is 91
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.
up-interval
Specifies, in seconds, the frequency at which the system issues the monitor check when the resource is up. The default
value is 0 (zero), which specifies that the system uses the value of the interval option whether the resource is up or
down.
Important: F5 Networks recommends that when you configure this option and the interval option, whichever value is
greater be a multiple of the lesser value to allow for an even distribution of monitor checks among all monitors.
username
Specifies the username, if the monitored target requires authentication. The default value is none.
SEE ALSO
create, delete, edit, glob, list, modify, regex, run, show, stop, tmsh
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BIG-IP 2017-08-16 ltm monitor postgresql(1)