Rules & Rule sets

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The Lens Portal uses rules to power its dynamic pools. It provides administrators with a powerful and flexible system to create pools based on a variety of workstation attributes.

You can combine rules into a ruleset, allowing for reusable groups of rules that can be used with multiple pools. Multiple rulesets can be associated with a pool too.

Rules

Attributes

The Lens portal provides administrators with many different attributes that they can create pools based on.

Category	Attribute name	Description
General	`Hostname`	The workstation’s hostname
General	`Platform`	The supported platform a workstation was detected on
General	`IP network (CIDR)`	The network the workstation is in
Operating system	`OS: Type`	The type of operating system: Such as `WINDOWS` or `LINUX`
Operating system	`OS: Version`	The operating system version
Template	`Template: Name`	The name of the Lens template that the workstation was created with
Template	`Template: Version`	The version of the Lens template that the workstation was created with

Comparators

Comparators tell the dynamic pool engine how to evaluate the attribute values, and whether the workstation should be included in the pool. Different attributes have different comparators.

Category	Attribute name	Attribute type	Supported comparators
General	`Hostname`	String	Normal: `Equal to`, `Not equal to`, `Starts with`, `Ends with` Advanced: `Regex: Match`, `Regex: No match`, `Regex search: Found`, `Regex search: Not found`
General	`Platform`	String	Normal: `Equal to`, `Not equal to`, `Starts with`, `Ends with` Advanced: `Regex: Match`, `Regex: No match`, `Regex search: Found`, `Regex search: Not found`
General	`IP network (CIDR)`	CIDR range	`is within CIDR`, `is not within CIDR`
Operating system	`OS: Type`	String	Normal: `Equal to`, `Not equal to`, `Starts with`, `Ends with` Advanced: `Regex: Match`, `Regex: No match`, `Regex search: Found`, `Regex search: Not found`
Operating system	`OS: Version`	Number	`<` (Less than), `>` (Greater than), `<=` (Less than or equal to), `>=` (Greater than or equal to), `Does not equal`, `Equals`
Template	`Template: Name`	String	Normal: `Equal to`, `Not equal to`, `Starts with`, `Ends with` Advanced: `Regex: Match`, `Regex: No match`, `Regex search: Found`, `Regex search: Not found`
Template	`Template: Version`	Number	`<` (Less than), `>` (Greater than), `<=` (Less than or equal to), `>=` (Greater than or equal to), `Does not equal`, `Equals`

Value

This is the value that you want to be checked against the workstation’s value.

Case-sensitivity

By default, the rules are case-insensitive. For example, Edit and EdIT would be treated as the same.
You can set case sensitivity on a rule-by-rule basis. Please note, that this will only affect attributes of the String type.

Examples

Take a look at some of the examples below to see how Lens would process different rules.

Hostnames

Rule configuration				Result
Workstation hostname	Attribute value	Comparator	Case-sensitive	Included in pool	Reason
`EDIT-001`	`Edit`	`Starts with`	❌		String matches
`EDIT-001`	`Edit`	`Starts with`		❌	Case does not match
`EDIT-001`	`it-00`	`Regex: Found`	❌		Matches the following characters: EDIT-001

IP network (CIDR)

Rule configuration			Result
Workstation IP	Attribute value	Comparator	Included in pool	Reason
`10.0.1.31`	`10.0.1.0/24`	`Is within CIDR`		10.0.1.31 is within the 10.0.1.0/24 network
`10.0.1.31`	`10.0.2.0/24`	`Is within CIDR`	❌	10.0.1.31 is not within the 10.0.2.0/24 network
`10.0.1.31`	`10.0.2.0/24`	`Is not within CIDR`		10.0.1.31 is not within the 10.0.2.0/24 network

Rule sets

Rules are grouped into what we call ‘Rule sets’. There is no limit to the amount of rules you can have within a rule set. It is possible to customise how the rules in the rule set are evaluated by changing the Rule logic mode. Take a look at the examples below on how the rules are evaluated.

Examples

For the examples below, lets assume the following:

Workstation name: EDIT-001
Workstation IP: 10.0.1.32

Scenario 1

Ruleset (Rule logic mode `OR`)
Rule #	Attribute name	Comparator	Value	Matches
Rule 1	`Hostname`	`Starts with`	`EDIT`
Rule 2	`IP Network (CIDR)`	`Is within CIDR`	`192.168.0.0/24`	❌
Result
Added to pool	Reason
	Rule 1 matched. As at least 1 rule matched, the workstation was added to the pool.

Scenario 2

Ruleset (Rule logic mode `AND`)
Rule #	Attribute name	Comparator	Value	Matches
Rule 1	`Hostname`	`Starts with`	`EDIT`
Rule 2	`IP Network (CIDR)`	`Is within CIDR`	`192.168.0.0/24`	❌
Result
Added to pool	Reason
❌	Rule 1 matched, but Rule 2 did not match. In `AND` logic mode, all rules must match. Workstation was not added to the pool.