[YUNIKORN-715] Refactor YuniKorn core's scheduler metrics for container allocation

• Type: Sub-task
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 0.12.1
• Component/s: core - common
• Labels: pull-request-available
• Target Version: 0.12.1
• Assignee: Chenya Zhang
• Reporter: Chenya Zhang
• Created: 21/Jun/21 16:56
• Updated: 21/Jan/22 21:48
• Resolved: 19/Jul/21 17:10

Description

Defining "allocatedContainers", "rejectedContainers", "schedulingErrors" and "releasedContainers" to initialize scheduler metrics is redundant in code.

• It can be combined into "containerAllocation"
• It can use a "prometheus.CounterVec" with different Prometheus labels

Issue Links

• links to: GitHub Pull Request #283