[MESOS-3388] Add an interface to allow Slave Modules to checkpoint/restore state.

• Type: Bug
• Status: Resolved
• Priority: Major
• Resolution: Won't Fix
• Labels: external-volumes mesosphere module
• Epic Link: per-container ip
• Assignee: Unassigned
• Reporter: Kapil Arya
• Shepherd: Kapil Arya
• Created: 08/Sep/15 16:43
• Updated: 26/Nov/18 12:32
• Resolved: 26/Nov/18 12:32

Description

• This is to restore module-specific in-memory data structures that might be required by the modules to do cleanup on task exit, etc.

• We need to define the interaction when an Agent is restarted with a different set of modules.

One open question is how does an Agent identify a certain module? One possibility is to assign a UID to the module and pass it in during `create()`?. The UID is used to assign a ckpt directory during ckpt/restore. (Something like /tmp/mesos/.../<slaveID>/modules/<module UID>).