| copyright | lastupdated | keywords | subcollection | ||
|---|---|---|---|---|---|
|
2019-07-01 |
layer 7 pool |
loadbalancer-service |
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{: #layer-7-pool}
A Layer 7 (L7) pool is a logical grouping of the servers (members) for handling incoming requests.
The Layer 7 load balancing feature can direct the incoming traffic to different back-end pools based
on the policies and rules. This feature is supported by associating multiple L7 pools with a load balancer. Layer 7 pools are used with the Layer 7 policies whose action is redirect to pool.
L7 pools support both HTTP and HTTPS as the back-end protocol.
{: #session-persistence}
Session persistence can be configured for each Layer 7 pool. For more information, see Advanced traffic management with IBM Cloud Load Balancer.
{: #layer-7-members}
Back-end servers that are associated with a Layer 7 pool are called Layer 7 members.
The same back-end server can be added multiple times to L7 pools, by specifying a different port number each time.
{: #configure-health-checks}
The health check definition is mandatory for each Layer 7 pool. The system pre-populates a default health check configuration for L7 pools.
You can customize these settings to suit your application needs:
- Interval - The interval in seconds between two consecutive health check attempts.
- Timeout - The maximum amount of time the system waits for a response to the health check request.
- MaxRetries - The maximum number of extra health check attempts that the system makes before declaring the service unhealthy.
- UrlPath - The HTTP URL path for the Layer 7 health check.