Some basic LXC snippets that keep recurring.
Motivation
I keep forgetting the exact syntax of these commands, so than I have to use a lot of history grepping to know what I did last time. Time to write some useful snippets instead.
Preparations
Set a few variables so the commands run smooth. The container will be started under this name, and when importing, this name is expected to be present as a tar.gz file.
CONTAINER="my_container"
echo $CONTAINER
Exporting an image
This can be used to transfer the container as a whole to another host or back up the entire thing
SNAPSHOT="$CONTAINER/latest"
IMAGENAME="$CONTAINER""_cont"
echo "Deleting previous snapshot.."
lxc -v delete $SNAPSHOT
echo "Creating snapshot.."
lxc -v snapshot "$CONTAINER" latest
echo "Publish snapshot.."
lxc -v publish $SNAPSHOT --alias $IMAGENAME
echo "Exporting container as tar archive.."
lxc -v image export $IMAGENAME "./$CONTAINER"
Importing an image
This can be used to import an existing container tar.gz archive
IMAGENAME="$CONTAINER""_cont"
IMPORTNAME="$CONTAINER"".tar.gz"
echo "Deleting previous image.."
lxc -v image delete $IMAGENAME
echo "Importing image.."
lxc -v image import $IMPORTNAME --alias $IMAGENAME
echo "Launching container.."
lxc -v launch $IMAGENAME $CONTAINER
