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https://issues.apache.org/jira/browse/YARN-6456?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Shane Kumpf updated YARN-6456:
------------------------------
    Description: 
 

With LCE, there are multiple ContainerRuntimes available for handling different 
types of containers; default, docker, java sandbox. Admins should have the 
ability to override the user decision and set a single global ContainerRuntime 
to be used for all containers.

Original Description:
{quote}One reason to use Docker containers is to be able to isolate different 
workloads, even, if they run as the same user.

I have noticed some issues in the current design:
 1. DockerLinuxContainerRuntime mounts containerLocalDirs 
{{nm-local-dir/usercache/user/appcache/application_1491598755372_0011/}} and 
userLocalDirs {{nm-local-dir/usercache/user/}}, so that a container can see and 
modify the files of another container. I think the application file cache 
directory should be enough for the container to run in most of the cases.
 2. The whole cgroups directory is mounted. Would the container directory be 
enough?
 3. There is no way to enforce exclusive use of Docker for all containers. 
There should be an option that it is not the user but the admin that requires 
to use Docker.
{quote}

  was:
One reason to use Docker containers is to be able to isolate different 
workloads, even, if they run as the same user.
I have noticed some issues in the current design:
1. DockerLinuxContainerRuntime mounts containerLocalDirs 
{{nm-local-dir/usercache/user/appcache/application_1491598755372_0011/}} and 
userLocalDirs {{nm-local-dir/usercache/user/}}, so that a container can see and 
modify the files of another container. I think the application file cache 
directory should be enough for the container to run in most of the cases.
2. The whole cgroups directory is mounted. Would the container directory be 
enough?
3. There is no way to enforce exclusive use of Docker for all containers. There 
should be an option that it is not the user but the admin that requires to use 
Docker.



> Allow administrators to set a single ContainerRuntime for all containers
> ------------------------------------------------------------------------
>
>                 Key: YARN-6456
>                 URL: https://issues.apache.org/jira/browse/YARN-6456
>             Project: Hadoop YARN
>          Issue Type: Sub-task
>          Components: nodemanager
>            Reporter: Miklos Szegedi
>            Priority: Major
>
>  
> With LCE, there are multiple ContainerRuntimes available for handling 
> different types of containers; default, docker, java sandbox. Admins should 
> have the ability to override the user decision and set a single global 
> ContainerRuntime to be used for all containers.
> Original Description:
> {quote}One reason to use Docker containers is to be able to isolate different 
> workloads, even, if they run as the same user.
> I have noticed some issues in the current design:
>  1. DockerLinuxContainerRuntime mounts containerLocalDirs 
> {{nm-local-dir/usercache/user/appcache/application_1491598755372_0011/}} and 
> userLocalDirs {{nm-local-dir/usercache/user/}}, so that a container can see 
> and modify the files of another container. I think the application file cache 
> directory should be enough for the container to run in most of the cases.
>  2. The whole cgroups directory is mounted. Would the container directory be 
> enough?
>  3. There is no way to enforce exclusive use of Docker for all containers. 
> There should be an option that it is not the user but the admin that requires 
> to use Docker.
> {quote}



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