Say I have, my-namespace -> my-pod -> my-container and I have a file located at my-container:/opt/tomcat/logs/catalina.2017-05-02.log. I have applied the below command to copy the file which isn't working,
kubectl cp my-namepace/my-pod:/opt/tomcat/logs/catalina.2017-05-02.log -c my-container .
Note: I have the tar binary on my container
Error:
tar: Removing leading `/' from member names
error: open .: is a directory
this works for me:
$(kubectl exec <pod-name> [-c <container-name>] -it -- cat <file-path>) > <local-file>
What you are asking kubectl to do is copy the file catalina.2017-05-02.log to the current context, but the current context is a directory. The error is stating that you can not copy a file to have the name of a directory.
Try giving the copied version of the file a name:
kubectl cp my-namepace/my-pod:/opt/tomcat/logs/catalina.2017-05-02.log -c my-container ./catalina.2017-05-02.log.
I noticed it fails when you try to specify the namespace (both as a prefix to the pod identifier and by using -n option)
Using the pod identifier alone works for me:
kubectl cp postgres-1111111111-11abc:/tmp/dump.csv dump
I found this usage the most convenient for me
kubectl cp /tmp/file <your_namespace>/<your_pod>:/tmp/newfile
and other direction
kubectl cp <your_namespace>/<your_pod>:/tmp/file /tmp/newfile
Following command kubectl cp NameSpace/POD_NAME:/DIR/FILE_NAME /tmp/ works for me.
Destination should also be a filename. so, command should be
kubectl cp my-namepace/my-pod:/opt/tomcat/logs/catalina.2017-05-02.log -c my-container ./catalina.2017-05-02.log
"cat" command works well for ascii files. for other files there would be limitations and copied files might be corrupted.
Remove "/" after ":" when specifying container file.
So this
kubectl cp my-namepace/my-pod:/opt/tomcat/logs/catalina.2017-05-02.log -c my-container .
will turn into this:
kubectl cp my-namepace/my-pod:opt/tomcat/logs/catalina.2017-05-02.log -c my-container .
