[YARN-5972] Support Pausing/Freezing of opportunistic containers

• Type: Bug
• Status: Open
• Priority: Major
• Resolution: Unresolved
• Assignee: Hitesh Sharma
• Reporter: Hitesh Sharma
• Created: 06/Dec/16 15:21
• Updated: 14/Sep/17 17:06

Description

YARN-2877 introduced OPPORTUNISTIC containers, and YARN-5216 proposes to add capability to customize how OPPORTUNISTIC containers get preempted.

In this JIRA we propose introducing a PAUSED container state.
Instead of preempting a running container, the container can be moved to a PAUSED state, where it remains until resources get freed up on the node then the preempted container can resume to the running state.

Note that process freezing this is already supported by 'cgroups freezer' which is used internally by the docker pause functionality. Windows also has OS level support of a similar nature.

One scenario where this capability is useful is work preservation. How preemption is done, and whether the container supports it, is implementation specific.

For instance, if the container is a virtual machine, then preempt call would pause the VM and resume would restore it back to the running state.
If the container executor / runtime doesn't support preemption, then preempt would default to killing the container.

Sub-Tasks

• NM Container lifecycle and state transitions to support for PAUSED container state.: Resolved
• Expose configurable preemption policy for OPPORTUNISTIC containers running on the NM: Resolved
• Update paused container state in the NM state store: Resolved
• Delay pause when container is localizing: Closed