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Ship it! Ship It! src/slave/containerizer/provisioners/appc/bind_backend.hpp (line 31) <https://reviews.apache.org/r/34427/#comment143207> Even with overlayfs is available, I don't think users has a choice to use it yet. Perhaps we should give this advice when we have overlayfs backend. - Timothy Chen On June 22, 2015, 4:53 p.m., Ian Downes wrote: > > ----------------------------------------------------------- > This is an automatically generated e-mail. To reply, visit: > https://reviews.apache.org/r/34427/ > ----------------------------------------------------------- > > (Updated June 22, 2015, 4:53 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 e7de0f3d1a5efeaef47d5074defe3b40db94f573 > 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 > >
