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Posted to user@mesos.apache.org by Thodoris Zois <zo...@ics.forth.gr> on 2017/09/14 15:18:38 UTC
Containerizers & Isolation
Hello list,
I have 4 questions, and i would be glad if someone can help..
- When someone is using the Docker Containerizer what kind of isolation can be used and how Mesos handles it?
- Custom isolators can be used both for Docker Containerizer and Mesos Containerizer or only in Mesos Containerizer?
- Is there any isolation between the executors under the same container when using Mesos Containerizer?
- A task is launched by command executor, default mesos executor, or custom executor. In each case task goes under the container of the executor? or a task and an executor are two different containers?
Because i saw an image (attached) on the book Apache Mesos Essentials and it actually confused me..
Thank you very much,
Thodoris
Re: Containerizers & Isolation
Posted by Thodoris Zois <zo...@ics.forth.gr>.
Thank you very much for your response!
When talking about executors i am referring only to default executor and command executor and not the custom one.
You say that there should be only one executor per container. By that you mean that you can run multiple executors under the same container but there won’t be any isolation between those executors or that it MUST be one executor per container?
When using command executor always different executors go under different containers, right?
When using the default executor?
Thank you,
Thodoris
> On 14 Sep 2017, at 18:53, Jie Yu <yu...@gmail.com> wrote:
>
> - When someone is using the Docker Containerizer what kind of isolation can be used and how Mesos handles it?
>
> It's the default isolation that Docker engine provides. You can alter some of those using ContainerInfo.DockerInfo.
>
> - Custom isolators can be used both for Docker Containerizer and Mesos Containerizer or only in Mesos Containerizer?
>
> Custom isolators only work for Mesos Containerizer currently.
>
> - Is there any isolation between the executors under the same container when using Mesos Containerizer?
>
> There should be only one executor per container.
>
> - A task is launched by command executor, default mesos executor, or custom executor. In each case task goes under the container of the executor? or a task and an executor are two different containers?
>
> Tasks go under the container of the executor.
>
> - Jie
>
>
> On Thu, Sep 14, 2017 at 8:18 AM, Thodoris Zois <zois@ics.forth.gr <ma...@ics.forth.gr>> wrote:
> Hello list,
>
> I have 4 questions, and i would be glad if someone can help..
>
> - When someone is using the Docker Containerizer what kind of isolation can be used and how Mesos handles it?
>
> - Custom isolators can be used both for Docker Containerizer and Mesos Containerizer or only in Mesos Containerizer?
>
> - Is there any isolation between the executors under the same container when using Mesos Containerizer?
>
> - A task is launched by command executor, default mesos executor, or custom executor. In each case task goes under the container of the executor? or a task and an executor are two different containers?
> Because i saw an image (attached) on the book Apache Mesos Essentials and it actually confused me..
>
> Thank you very much,
> Thodoris
>
> <cont.png>
>
Re: Containerizers & Isolation
Posted by Jie Yu <yu...@gmail.com>.
>
> - When someone is using the Docker Containerizer what kind of isolation
> can be used and how Mesos handles it?
It's the default isolation that Docker engine provides. You can alter some
of those using ContainerInfo.DockerInfo.
- Custom isolators can be used both for Docker Containerizer and Mesos
> Containerizer or only in Mesos Containerizer?
Custom isolators only work for Mesos Containerizer currently.
- Is there any isolation between the executors under the same container
> when using Mesos Containerizer?
There should be only one executor per container.
- A task is launched by command executor, default mesos executor, or
> custom executor. In each case task goes under the container of the
> executor? or a task and an executor are two different containers?
Tasks go under the container of the executor.
- Jie
On Thu, Sep 14, 2017 at 8:18 AM, Thodoris Zois <zo...@ics.forth.gr> wrote:
> Hello list,
>
> I have 4 questions, and i would be glad if someone can help..
>
> - When someone is using the Docker Containerizer what kind of isolation
> can be used and how Mesos handles it?
>
> - Custom isolators can be used both for Docker Containerizer and Mesos
> Containerizer or only in Mesos Containerizer?
>
> - Is there any isolation between the executors under the same container
> when using Mesos Containerizer?
>
> - A task is launched by command executor, default mesos executor, or
> custom executor. In each case task goes under the container of the
> executor? or a task and an executor are two different containers?
> Because i saw an image (attached) on the book Apache Mesos Essentials
> and it actually confused me..
>
> Thank you very much,
> Thodoris
>
>