[MESOS-4719] Add allocator metric for number of offers each role / framework received.

• Type: Improvement
• Status: Accepted
• Priority: Major
• Resolution: Unresolved
• Component/s: allocation
• Labels: mesosphere
• Epic Link: Allocator metrics
• Sprint: Mesosphere Sprint 29, Mesosphere Sprint 30, Mesosphere Sprint 31
• Story Points: 2
• Assignee: Unassigned
• Reporter: Benjamin Bannier
• Shepherd: Benjamin Mahler
• Created: 19/Feb/16 12:00
• Updated: 19/Mar/19 21:44

Description

A counter for the number of allocations to a framework can be used to monitor allocation progress, e.g., when agents are added to a cluster, and as other frameworks are added or removed.

Currently, an offer by the hierarchical allocator to a framework consists of a list of resources on possibly many agents. Resources might be offered in order to satisfy outstanding quota or for fairness. To capture allocations on fine granularity we should not count the number of offers, but instead the pieces making up that offer, as such a metric would better resolve the effect of changes (e.g., adding/removing a framework).