Cloning installed packages list over LXC containers with apt-clone

apt-clone is quite convenient to run LXC containers with the same set of installed packages.

here’s a short bash function to do run apt-clone on a list of containers to synchronize them all:

function lxc-clone {
    MKTEMP=`mktemp --dry-run` 
    
    guests=($(lxc-ls --active))

    # first get clones for each
    for guest in "${guests[@]}"; do
	echo -e "[${shell_datecolor}$(date +%H:%M:%S)${shell_clear} ${shell_containercolor}$guest:${shell_clear} ${shell_promptcolor}#${shell_clear} ${shell_invert}apt-clone clone $@${shell_clear}]"
	lxc-attach -n "$guest" -- apt-clone clone "$MKTEMP.$guest"
	cp -v `lxc-config lxc.lxcpath`/"$guest"/rootfs"$MKTEMP.$guest".apt-clone.tar.gz "$MKTEMP.$guest".apt-clone.tar.gz
    done

    # then do a restore of all in each
    for guest in "${guests[@]}"; do
	echo -e "[${shell_datecolor}$(date +%H:%M:%S)${shell_clear} ${shell_containercolor}$guest:${shell_clear} ${shell_promptcolor}#${shell_clear} ${shell_invert}apt-clone restore $@${shell_clear}]"
	for guestwithin in "${guests[@]}"; do
	    echo "=> ...$guestwithin"
	    cp -v "$MKTEMP.$guestwithin".apt-clone.tar.gz `lxc-config lxc.lxcpath`/"$guest"/rootfs"$MKTEMP.$guestwithin".apt-clone.tar.gz	    
	    lxc-attach -n "$guest" -- apt-clone restore "$MKTEMP.$guestwithin".apt-clone.tar.gz
	    rm -fv `lxc-config lxc.lxcpath`/"$guest"/rootfs"$MKTEMP.$guestwithin".apt-clone.tar.gz
	done
	
    done    

    rm -f "$MKTEMP".*.apt-clone.tar.gz
}

The variable $guest sets which LXC containers to work on. Here, it works on all active containers.

(the color variables are set in stalag13-00-shell.sh but arent required)

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