[MESOS-8982] add cgroup memory.max_usage_in_bytes into slave monitor/statistics endpoint

• Type: Improvement
• Status: Open
• Priority: Minor
• Resolution: Unresolved
• Affects Version/s: 1.6.0
• Component/s: containerization, docker, HTTP API
• Labels: containerizer
• Assignee: Unassigned
• Reporter: Martin Bydzovsky
• Created: 06/Jun/18 12:11
• Updated: 06/Jul/18 21:27

Description

As an operator, I'm periodically checking slave's monitor/statistics endpoint to get the memory/cpu usage/cpu throttle for each running task. However, if there is a short-term memory usage peak (lets say seconds), I might miss it (the memory might have been allocated and also released in between my 2 collect-metrics intervals). Since the max used memory is logged in the `/sys/fs/cgroup/memory/docker/CID/memory.max_usage_in_bytes`, it would be great, if this info would have been exposed in the api as well..