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src/slave/containerizer/provisioners/appc/bind_backend.hpp
<https://reviews.apache.org/r/34427/#comment140424>

    Given that you dont declare any templates, would it make sense to split 
this into cpp+hpp?



src/slave/containerizer/provisioners/appc/bind_backend.hpp
<https://reviews.apache.org/r/34427/#comment140425>

    


- Till Toenshoff


On May 19, 2015, 6:46 p.m., Ian Downes wrote:
> 
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> https://reviews.apache.org/r/34427/
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> 
> (Updated May 19, 2015, 6:46 p.m.)
> 
> 
> Review request for mesos, Chi Zhang, Paul Brett, Timothy Chen, and Vinod Kone.
> 
> 
> Repository: mesos
> 
> 
> Description
> -------
> 
> Note: This is a specialized backend; see notes in bind_backend.hpp.
>  
> Reproduced here for your convenience:
> 
> This is a specialized backend that may be useful for deployments
> using large (multi-GB) single-layer images *and* where more
> recent kernel features such as overlayfs are not available. For small
> images (10's to 100's of MB) the Copy backend may be sufficient.
> 1) It supports only a single layer. Multi-layer images will fail
>    to provision and the container will fail to launch!
> 2) The filesystem is read-only because all containers using this
>    image share the source. Select writable areas can be achieved
>    by
>    mounting read-write volumes to places like /tmp, /var/tmp,
>    /home, etc. using the ContainerInfo. These can be relative to
>    the executor work directory.
> 3) It relies on the image persisting in the store.
> 4) It's fast because the bind mount requires (nearly) zero IO.
> 
> 
> Diffs
> -----
> 
>   src/Makefile.am 34755cf795391c9b8051a5e4acc6caf844984496 
>   src/slave/containerizer/provisioners/appc/backend.cpp PRE-CREATION 
>   src/slave/containerizer/provisioners/appc/bind_backend.hpp PRE-CREATION 
> 
> Diff: https://reviews.apache.org/r/34427/diff/
> 
> 
> Testing
> -------
> 
> manual testing of a single layer image with RW relative bind mount for /tmp.
> 
> 
> Thanks,
> 
> Ian Downes
> 
>

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