[MESOS-6219] Improve auto-detection of predefined resource types.

• Type: Improvement
• Status: Open
• Priority: Major
• Resolution: Unresolved
• Component/s: containerization
• Assignee: Unassigned
• Reporter: Yan Xu
• Created: 21/Sep/16 20:56
• Updated: 26/Sep/16 04:27

Description

Mesos agent currently auto-detects certain predefined resource types when they are not specified. These include cpus, mem, (root) disk, gpus and also MESOS-6062 is adding auto-detection for mount disks when the size is specified as a special value "0".

Due to the limitation of the Resources abstraction the caller of Resources::parse() can't tell if a resource is intentionally specified with an empty value or unspecified. The current resource auto-detection in Containerizer::resources() resorts to scanning the --resources flag to check if a resource is specified, this is very fragile, e.g., it would think gpus:0 is specified (and not auto-detected) if there is a mount disk with its root being /biggpush.

It would be nice if we can have the user explicitly specify the intention to have value of a standard resource auto-detected (at least with the JSON input).

Issue Links

• is related to: MESOS-6062 mesos-agent should autodetect mount-type volume sizes