Commits on May 3, 2022

1. (JENKINS-68371) improve asynchrony of StandardPlannedNodeBuilder …

   When the NodeProvisioner is building agents in the provision step: https://github.com/jenkinsci/kubernetes-plugin/blob/307d9791dcf7dfc3bbbcbdf1a7eab44ed752a4c8/src/main/java/org/csanchez/jenkins/plugins/kubernetes/KubernetesCloud.java#L536 it currently loops through the number of
   nodes to provision. This is implemented in the StandardPlannedNodeBuilder,
   and is done as a blocking operation, while using a Future interface
   to satisfy the consumers.  In our testing, it was seen that this
   operation could take upwards of 100 seconds when under load, causing
   provisioning to be effectively stopped for periods of time.
   
   This change introduces a configurable thread pool that will cause
   the Agent creation step to occur in a separate thread.  This, in
   our testing resolves the serial bottleneck issue and allows provisioning
   to continue while the blocking operations occur separately.

   

   jonathannewman committed May 3, 2022
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