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Copied code from CmdSave into CmdExport. This should work, not an expert in the API calls being made. But it does make more sense to have a consistent export/save flag. Signed-off-by: Joseph Kern <joseph.a.kern@gmail.com> checkpoint before edits on the export functions Signed-off-by: Joseph Kern <joseph.a.kern@gmail.com> Added an --output flag to docker export and created tests. Signed-off-by: Joseph Kern <joseph.a.kern@gmail.com> White space cleanup. Signed-off-by: Joseph Kern <joseph.a.kern@gmail.com> Docker-DCO-1.1-Signed-off-by: Joseph Kern <jkern@semafour.net> (github: jfrazelle) checkpoint before edits on the export functions Signed-off-by: Joseph Kern <joseph.a.kern@gmail.com> White space cleanup. Signed-off-by: Joseph Kern <joseph.a.kern@gmail.com> Added text to reflect a new output option for the export command. Signed-off-by: Joseph Kern <joseph.a.kern@gmail.com> Whitespace clean up Signed-off-by: Joseph Kern <joseph.a.kern@gmail.com> Added man page documentation for the new --output flag in export Signed-off-by: Joseph Kern <joseph.a.kern@gmail.com>
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% DOCKER(1) Docker User Manuals % Docker Community % JUNE 2014
NAME
docker-export - Export the contents of a filesystem as a tar archive to STDOUT
SYNOPSIS
docker export [--help] CONTAINER
DESCRIPTION
Export the contents of a container's filesystem using the full or shortened container ID or container name. The output is exported to STDOUT and can be redirected to a tar file.
Stream to a file instead of STDOUT by using -o.
OPTIONS
--help Print usage statement -o, --output="" Write to a file, instead of STDOUT
EXAMPLES
Export the contents of the container called angry_bell to a tar file called angry_bell.tar:
# docker export angry_bell > angry_bell.tar
# docker export --output=angry_bell-latest.tar angry_bell
# ls -sh angry_bell.tar
321M angry_bell.tar
# ls -sh angry_bell-latest.tar
321M angry_bell-latest.tar
See also
docker-import(1) to create an empty filesystem image and import the contents of the tarball into it, then optionally tag it.
HISTORY
April 2014, Originally compiled by William Henry (whenry at redhat dot com) based on docker.com source material and internal work. June 2014, updated by Sven Dowideit SvenDowideit@home.org.au Janurary 2015, updated by Joseph Kern (josephakern at gmail dot com)