Dynamic Condition

What Is Dynamic Condition?

Dynamic Condition is a powerful condition type that enables dynamic and flexible conditions to be created by comparing two Smart Variables (fx).

Query keyx-user-role request header

Text equality

Key to compareadmin

If the header value equals "admin" → the condition returns TRUE

With this condition, flexible traffic management can be performed by comparing any two dynamic values.

TIP

Protocol and Level Flexibility

This condition can be used in both the HTTP and TCP protocols, in the request and response phases.

The Importance of Dynamic Condition

Dynamic Condition is one of the most powerful and flexible condition types of TR7. The left side of the comparison always supports Smart Variables (fx); the right side accepts a smart variable in the Text equality and Integer operators, and a fixed value in the other operators.

With Dynamic Condition:

• Header values can be compared dynamically,
• Numeric values can be compared (equality, greater than, less than, range),
• Boolean values can be checked,
• IP addresses can be matched with CIDR ranges,
• Text matching can be performed with regex.

Supported Operators:

Operator	Description
Text equality	Checks the exact match of the text value
Text inclusion	Checks whether the text contains the specified value
Text start	Checks whether the text starts with the specified expression
Text end	Checks whether the text ends with the specified expression
Text regex	Checks whether the text matches the defined regular expression
Integer equality	Checks whether the numeric value is equal to the specified number
Integer greater than	Checks whether the numeric value is greater than the specified value
Integer less than	Checks whether the numeric value is less than the specified value
Integer range	Checks whether the numeric value is within a defined range
Boolean	Checks the state of the logical (true/false) value
IP/cidr match	Checks whether the IP address or network (CIDR) matches the specified IP/CIDR block

Supported vService Types

HTTP

L7 TCP

Network

How to Add?

A new Dynamic Condition can be added through the TR7 web management interface by following the steps below:

1. The Configuration Menu is opened by clicking the TR7 logo at the bottom left.
2. The Load Balancer → Conditions → Add steps are followed.
3. Dynamic condition is selected as Criteria.
4. The related configurations of the condition are made.
5. The condition is added by clicking the Add button.

Dynamic Condition Add Form

Dynamic Condition Add Form

INFO

Condition Name

An optional name can be entered for the condition to be created.

This field is especially important in the following scenarios:

• When many conditions are defined under the same vService,
• When conditions with similar criteria need to be distinguished,
• When it is necessary to quickly understand which business rule the condition represents.

When this field is left empty, TR7 analyzes the content of the related condition and creates an automatic, descriptive name in the Condition Description field. This generated description is used as the name in condition lists.

INFO

Criteria Required

The field that determines the type of the condition; Dynamic condition is selected from the searchable dropdown list. This selection determines the fields displayed in the form. The criterion cannot be changed after the condition is saved: if a different criterion is needed, a new condition is defined. For all criteria in the list and their scopes, the criteria catalog on the Conditions page can be referred to.

INFO

Condition Level

Determines in which phase the condition is evaluated; it cannot be changed after saving.

• On request: Evaluated when the request is received.
• On response: Evaluated when the response is received.

INFO

Condition Protocol

Determines in which protocol the condition works; it cannot be changed after saving.

• HTTP: Used in HTTP vServices.
• TCP: Used in L7 TCP vServices. Since there are no variables belonging to the response stage in TCP, the variable list is offered from the request set even if On Response is selected.

INFO

Query Key Required

The smart variable that produces the value on the left side of the comparison is entered in this field; fixed text and variables can be combined in the same field.

TIP

This field supports Smart Variables. Existing variables can be accessed with the fx button, and dynamic content can be created. For detailed information, the Variables document can be referred to.

The variable list changes according to the selected Condition Protocol and Condition Level values:

Variable	Description	Availability
Client IP address	Client IP address	In every protocol and stage
Path/page of the request [URI]	Request path	HTTP only
Request HTTP header content	Request header value	HTTP only
Request cookie content	Request cookie value	HTTP only
Response HTTP header content	Response header value	HTTP + On Response only
Status	Returned HTTP status code	HTTP + On Response only

INFO

Operator Required

The comparison method is selected; the selected operator determines the value field that opens below.

Operator	Description
Text equality	Checks the exact match of the text value
Text inclusion	Checks whether the text contains the specified value
Text start	Checks whether the text starts with the specified expression
Text end	Checks whether the text ends with the specified expression
Text regex	Checks whether the text matches the defined regular expression
Integer equality	Checks whether the numeric value is equal to the specified number
Integer greater than	Checks whether the numeric value is greater than the specified value
Integer less than	Checks whether the numeric value is less than the specified value
Integer range	Checks whether the numeric value is within a defined range
Boolean	Checks the state of the logical (true/false) value
IP/cidr match	Checks whether the IP address or network (CIDR) matches the specified IP/CIDR block

INFO

Comparison Value Field Varies by operator

The value on the right side of the comparison is entered in a field whose label and behavior change according to the selected operator:

Operator	Field Opened	Behavior
Text equality	Key to compare	Text with smart variable support; there is an fx button
Text inclusion / Text start / Text end	Text to compare	Plain text (no fx)
Text regex	Regex to compare	Regular expression; it can be tried with the test tool next to it
Integer equality / greater than / less than	Integer to compare	Numeric value with smart variable support; there is an fx button
Integer range	Range start + Range end	Two separate fields for the range; both support smart variables
Boolean	-	No value field opens; the true/false state of the variable is evaluated
IP/cidr match	IP/cidr to compare	Separate IP and CIDR inputs (default CIDR: /24); both are validated

All the opened fields are required. In Integer range, both boundary values are included in the range; all text operators are case-sensitive.

TIP

Fields with the fx button support Smart Variables; dynamic content can be created by accessing the existing variables. For detailed information, the Variables document can be referred to.

INFO

Condition Description

It is created automatically by TR7 in line with the entered criteria and values.

This description:

• which value the condition applies to,
• which criterion it works on,
• the quick understanding of the condition on listing screens

is produced dynamically by the system so as to provide these.

INFO

Form Buttons

Add

The condition adding process is completed by clicking the Add button.

Add & Repeat

With the Add & Repeat button, the condition adding process is completed, and another new condition can be added with different configurations without leaving the related window.

Condition Added

Operational Usage Recommendations

• Header Value Check. Traffic management should be performed according to the application logic by checking custom headers.
• Dynamic Comparison. Dynamic conditions should be created by comparing two smart variables.
• Numeric Thresholds. Values such as response time and status code should be checked with numeric operators.
• IP Range Check. Dynamic IP checks should be performed with IP/cidr matching.