[jira] [Created] (MESOS-7580) Use root fs as lower RO layer and container fs as upper layer

["Mikhail Lesyk (JIRA)" <ji...@apache.org>]

Mikhail Lesyk created MESOS-7580:
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             Summary: Use root fs as lower RO layer and container fs as upper layer
                 Key: MESOS-7580
                 URL: https://issues.apache.org/jira/browse/MESOS-7580
             Project: Mesos
          Issue Type: Wish
          Components: containerization
            Reporter: Mikhail Lesyk


See example:
{code}
mkdir -p rootfs/{opt,container,workdir,result}
mount -t overlay -o lowerdir=rootfs,upperdir=rootfs/container,workdir=rootfs/workdir none rootfs/result
touch rootfs/result/opt/crap
umount rootfs/result
ls -a rootfs/opt/
.  ..
{code}
Where rootfs - imaginary root filesystem
rootfs/opt - variable directory on that filesystem
rootfs/container - container work dir
rootfs/result - result overlayfs mountpoint(root fs from container point of view)

So, any change under rootfs/result will be not visible from rootfs point of view and it will remain clean, so every container could have own snapshot of host's root filesystem, but changes would be individual.




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