Supplemental instances are JClouds instances that are temporarily provisioned for the lifetime of this job. Apart from being provisioned and torn down by the JClouds plugin, these instances are not under any control of jenkins. In particular, they do not contribute build slaves. They are however subject to the instance cap limitation of the specified JClouds profile. The IPs for the instances will be recorded in a comma-separated list, in the environment variable "JCLOUDS_IPS". How these instances are used is at the discretion of the build job.

Blocking behavior

If a template with active phone home-flag is specified, the the build will be blocked until the instance(s) have invoked the phone-home webhook (or the phone-home timeout has been reached). Otherwise, the build will commence immediately after launching the instances.