[
https://issues.apache.org/jira/browse/MESOS-5028?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15211203#comment-15211203
]
Zhitao Li commented on MESOS-5028:
----------------------------------
[~gilbert] and I took a quick, and this is actually caused by the layer trying
to replace a directory with a symlink, which is not allowed by `cp -aT` (sorry
my previous description was a bit misleading).
> Copy provisioner does not work for docker image layers with dangling symlink
> ----------------------------------------------------------------------------
>
> Key: MESOS-5028
> URL: https://issues.apache.org/jira/browse/MESOS-5028
> 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 of:
> {quote}
> rm -rf /etc/apt/* && ln -sf /build-mount-point/ /etc/apt
> {quote}
--
This message was sent by Atlassian JIRA
(v6.3.4#6332)
