[GOBBLIN-349] Add guages for gobblin cluster metrics

• Type: Improvement
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 0.12.0
• Assignee: Unassigned
• Reporter: Kuai Yu
• Created: 16/Dec/17 01:58
• Updated: 03/Jan/18 06:30
• Resolved: 24/Dec/17 00:29

Description

Although we already have a counter metrics, but we still add a gauge metrics for completeness because internally LinkedIn will use healthcheck sensor to process the metrics, the counter will be treated as a rate instead of a real time number.