SIP rules for routing to servers in maintenance mode
We can build complex rule conditions from subexpressions to modify routing policy SIP rules, and route certain messages to servers in maintenance mode while routing other traffic to servers that are not in maintenance mode from within the same dynamic cluster.
To modify rules through the rule builder, we must have administrator privileges.
(ZOS) Restriction: Intelligent Management does not support SIP features on the z/OS operating system.
Typically, only servers that are not in maintenance mode receive and service application requests. We can also route to servers in maintenance mode, so we can route to a subset of servers to verify configuration changes or troubleshoot issues without interfering with availability. We can direct SIP traffic to specific clusters with routing rules. The expressions for SIP routing rules are enhanced to support an expression that provides more functionality and flexibility in defining the target cluster. For example, the expressions...
cluster='TestCell/TestClusterA'
serverMaintanceMode='affinity'...direct the on demand router to route calls to members of TestClusterA in maintenance mode. We can also use this function in conjunction with the prioritized routing rules.
Tasks
- From the administrative console, click...
Servers > Server types > On demand routers > odr_name > SIP on demand router settings > Routing policy SIP rules > Specify by > Expression > Subexpression builder
- Select and as the logical operator.
- Select Server maintenance mode as the operand.
- Select Equals (=) as the operator.
- Select Affinity as the value. Click Generate subexpression.
- Click Append to add the subexpression to your rule.
Related:
Rule-based request classification Set maintenance mode Intelligent Management: routing and service policies Intelligent Management: rules for ODR routing policy administrative tasks Intelligent Management: rules for ODR service policy administrative tasks