[MESOS-9874] Add environment variable `MESOS_ALLOCATION_ROLE` to the task/container.

• Type: Task
• Status: Resolved
• Priority: Major
• Resolution: Done
• Fix Version/s: 1.9.0
• Component/s: containerization
• Labels: containerization
• Target Version/s: 1.9.0
• Sprint: Containerization: RI 15 Sp 49
• Story Points: 3
• Assignee: Qian Zhang
• Reporter: Gilbert Song
• Shepherd: Gilbert Song
• Created: 01/Jul/19 21:16
• Updated: 30/Jul/19 06:35
• Resolved: 03/Jul/19 00:04

Description

Set this env var as the role from the task resource. Here is an example:
https://github.com/apache/mesos/blob/master/src/master/readonly_handler.cpp#L197

We probably want to set this env from executors, by adding this env to CommandInfo.

Mesos and docker containerizers should be supported.