[ 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)