YuniKorn Concepts
Internal
Plugin Mode
Resource Manager (RM)
YuniKorn communicates with various implementation of resource management systems (Kubernetes, YARN) via a standard interface defined in the yunikorn-scheduler-interface package.
Allocation
A core scheduler-level concept. An allocation can be in one of two states ("Pending" and "In-Progress"). A pending allocation is one which has been decided upon by YuniKorn but has not yet been communicated to the default scheduler via PreFilter()/Filter(). Once PreFilter()/Filter() pass, the allocation transitions to "In-Progress" to signify that the default scheduler is responsible for fulfilling the allocation. Once PostBind() is called in the plugin to signify completion of the allocation, it is removed.
Application
Application Metadata
Application ID
Looks in this order:
- Annotation "yunikorn.apache.org/app-id"
- Label "applicationId"
- ...
Queue Name
User
Tags
Groups
TaskGroups
OwnerReference
Usually a pod, designated by its UID.
Scheduling Policy Parameters
Application Task
Node
Configuration
Context
yunikorn-k8shim cache.Context