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From "Jie Yu (JIRA)" <>
Subject [jira] [Updated] (MESOS-5028) Copy provisioner cannot replace directory with symlink
Date Mon, 28 Mar 2016 16:16:25 GMT


Jie Yu updated MESOS-5028:
    Sprint: Mesosphere Sprint 32

> Copy provisioner cannot replace directory with symlink
> ------------------------------------------------------
>                 Key: MESOS-5028
>                 URL:
>             Project: Mesos
>          Issue Type: Bug
>          Components: containerization
>            Reporter: Zhitao Li
>            Assignee: Gilbert Song
> I'm trying to play with the new image provisioner on our custom docker images, but one
of layer failed to get copied, possibly due to a dangling symlink.
> Error log with Glog_v=1:
> {quote}
> I0324 05:42:48.926678 15067 copy.cpp:127] Copying layer path '/tmp/mesos/store/docker/layers/5df0888641196b88dcc1b97d04c74839f02a73b8a194a79e134426d6a8fcb0f1/rootfs'
to rootfs '/var/lib/mesos/provisioner/containers/5f05be6c-c970-4539-aa64-fd0eef2ec7ae/backends/copy/rootfses/507173f3-e316-48a3-a96e-5fdea9ffe9f6'
> E0324 05:42:49.028506 15062 slave.cpp:3773] Container '5f05be6c-c970-4539-aa64-fd0eef2ec7ae'
for executor 'test' of framework 75932a89-1514-4011-bafe-beb6a208bb2d-0004 failed to start:
Collect failed: Collect failed: Failed to copy layer: cp: cannot overwrite directory ‘/var/lib/mesos/provisioner/containers/5f05be6c-c970-4539-aa64-fd0eef2ec7ae/backends/copy/rootfses/507173f3-e316-48a3-a96e-5fdea9ffe9f6/etc/apt’
with non-directory
> {quote}
> Content of _/tmp/mesos/store/docker/layers/5df0888641196b88dcc1b97d04c74839f02a73b8a194a79e134426d6a8fcb0f1/rootfs/etc/apt_
points to a non-existing absolute path (cannot provide exact path but it's a result of us
trying to mount apt keys into docker container at build time).
> I believe what happened is that we executed a script at build time, which contains equivalent
> {quote}
> rm -rf /etc/apt/* && ln -sf /build-mount-point/ /etc/apt
> {quote}

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