Failed to schedule Fluentd pods

The Fluentd daemonset is unable to schedule pods.

Symptoms

You might see the following error message:

Warning FailedScheduling 4s (x12 over 4m50s) default-scheduler 0/4 nodes are available: 1 Insufficient memory, 3 node(s) didn't match node selector.

Causes

The cluster nodes might have insufficient resources.

Resolving the problem

Decrease resource requests. For more information about resource sizes, see Hardware requirements and recommendations for foundational services.