Sidharta Seethana updated YARN-3851:
    Release Note:   (was: Support for this was added as part of YARN-3853 . It 
wasn't straightforward (or very useful) to split the patches up, so a single 
patch was submitted. )

> Add support for container runtimes in YARN 
> -------------------------------------------
>                 Key: YARN-3851
>                 URL: https://issues.apache.org/jira/browse/YARN-3851
>             Project: Hadoop YARN
>          Issue Type: Sub-task
>          Components: yarn
>            Reporter: Sidharta Seethana
>            Assignee: Sidharta Seethana
> We need the ability to support different container types within the same 
> executor. Container runtimes are lower-level implementations for supporting 
> specific container engines (e.g docker). These are meant to be independent of 
> executors themselves - a given executor (e.g LinuxContainerExecutor) could 
> potentially switch between different container runtimes depending on what a 
> client/application is requesting. An executor continues to provide higher 
> level functionality that could be specific to an operating system - for 
> example, LinuxContainerExecutor continues to handle cgroups, users, 
> diagnostic events etc. 

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