sys ha-group
sys ha-group(1) BIG-IP TMSH Manual sys ha-group(1)
NAME
ha-group - Configures the high availability (HA) scoring mechanism for a unit in a traffic group of BIG-IP(r) systems.
MODULE
sys
SYNTAX
Configure the ha-group component within the sys module using the following syntax.
CREATE/MODIFY
create ha-group [name]
modify ha-group [name]
options:
active-bonus [integer]
app-service [[string] | none]
clusters none
clusters [add | delete | modify | replace-all-with] {
[name] {
app-service [[string] | none]
attribute percent-up-members
threshold [integer]
minimum-threshold [integer]
sufficient threshold [integer | all]
weight [integer]
}
}
description [string]
[disabled | enabled]
pools none
pools [add | delete | modify | replace-all-with] {
[name] {
app-service [[string] | none]
attribute percent-up-members
threshold [integer]
minimum-threshold [integer]
sufficient threshold [integer]
weight [integer]
}
}
trunks none
trunks [add | delete | modify | replace-all-with] {
[name] {
app-service [[string] | none]
attribute percent-up-members
threshold [integer]
minimum-threshold [integer]
sufficient threshold [integer]
weight [integer]
}
}
DISPLAY
list ha-group
list ha-group [name]
options:
all
all-properties
current-module
one-line
DELETE
delete ha-group [name]
DESCRIPTION
You can use the ha-group component to configure a high availability (HA) group that determines the HA scoring mechanism for
a unit in a traffic group. This mechanism compares the relative health of the two or more units in the traffic group and
the system with the highest score becomes the active unit. Note Use the attribute ha-group of the traffic group to make the
association.
EXAMPLES
create ha-group group1 pools add { ftp_pool { attribute percent-up-members weight 70 } }
Creates a HA group, named group1, that includes the pool named ftp_pool, and uses the attribute percent-up-members and a
weight of 70 to determine the HA score for a unit in a traffic group.
list ha-group group1
Displays the configuration of the HA group, group1.
OPTIONS
active-bonus
Specifies a number to add to the unit's HA score when the unit is active. This option ensures that the state of a unit
is dependent upon the history of its state. The default value is 10 (ten). The range is 0 - 100.
app-service
Specifies the name of the application service to which the object 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
object. Only the application service can modify or delete the object.
attribute
Specifies an attribute of the component that you want to use for the HA scoring mechanism. Percent-up-members is the
only available attribute for HA scoring for the clusters, pools, and trunks options.
clusters
Specifies the clusters that you want to configure for the HA group. You can only configure a cluster on a chassis.
description
User defined description.
[disabled | enabled]
Enables or disables the HA group in the HA table. The default value is enabled.
name Specifies the name of the component that you want to configure. This option is required when you create, modify, or
delete a HA group. This option is also required when you configure clusters, pools, or trunks for the HA group.
pools
Specifies the pools that you want to configure for the HA group.
threshold
Deprecated. Use minimum-threshold instead.
minimum-threshold
Specifies the minimum number of up interfaces in a trunk, up pool members in a pool, or up cluster members in a
cluster below which the specified component does not contribute to the HA score for the unit. The default value is 0
(zero), which indicates this option is disabled. The value may not exceed the number of members of the trunk, pool, or
cluster.
sufficient-threshold
Specifies the sufficient number of up interfaces in a trunk, up pool members in a pool, or up cluster members in a
cluster above which the specified component is considered at 100% for its contribution to the HA score for the unit.
The default value is all (or 0). The value may not exceed the number of members of the trunk, pool, or cluster.
trunks
Specifies the trunks that you want to configure for the HA group.
weight
The value of this option is multiplied by the percent of up cluster, pool, or trunk members, and is added to the HA
score. The default value is 10. The range is 10 - 100.
SEE ALSO
create, delete, list, modify, tmsh
COPYRIGHT
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use, without the express written permission of F5 Networks, Inc.
F5 Networks and BIG-IP (c) Copyright 2009-2010, 2012-2013, 2016. All rights reserved.
BIG-IP 2016-04-08 sys ha-group(1)