[6.2.1] Direct IO and Docker Issue

[TheGood]

I have noticed that with Direct IO enabled, a couple of docker containers (ls.io Plex, JDownloader2, have not checked more) are hanging with errors when trying to write data on /appdata and are unable to start correctly. I am using a cache only share on an SSD for the appdata.

 

When I disable it I experience no issues, so not a big deal. Just curious if it is a known bug, or I am doing something wrong.

 

Any feedback appreciated.

storm-diagnostics-20161015-1759.zip

[Videodr0me]

You might need to start the docker in "--privileged" mode in order to use mapped paths to "mnt/user/" or "mnt/user0/" if direct i/o is turned on. Please try this. Alternatively point the docker paths to "mnt/cache/.dockerdata" or "mnt/diskx/dockerdata", if possible.