mirror of
https://codeberg.org/scip/jaildk.git
synced 2025-12-16 20:21:05 +01:00
added freeze&thaw
This commit is contained in:
Thomas von Dein
220
jaildk
220
jaildk
@@ -34,6 +34,10 @@ ${beg}Managing Jails:${end}
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login - login into a jail (also available as separate command)
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blogin - chroot into a build jail (dito)
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${beg}Transferring Jails:${end}
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freeze - freeze (build an image of) a jail
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thaw - thaw (install) an image of a jail somewhere else
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Run the <command> without arguments to get usage help about the command.
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EOF
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@@ -80,13 +84,21 @@ load-jail-config() {
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die_if_not_exist() {
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jail=$1
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which=$2
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VERSION=$3
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if test -z "$which"; then
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which="Jail"
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fi
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if ! test -d $j/etc/$jail; then
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die "$which $jail doesn't exist!"
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fi
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if test -n "$VERSION"; then
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if ! test -d $j/etc/$jail/etc-$VERSION; then
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die "$which $jail $version doesn't exist!"
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fi
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fi
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}
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jaildk_build() {
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@@ -1080,10 +1092,216 @@ jaildk_fetch_ports() {
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ex rm -rf $j/ports/tmp/ports*
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}
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freeze_usage() {
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echo "Usage: $0 freeze <jail> [options]
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Options:
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-v <version> freeze <version> of <jail>
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-b include the base layer (default: no)
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-a include the application layer (default: no)"
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exit 1
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}
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freeze_dir() {
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dstdir=$1
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src=$2
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srcdir=$(echo $src | cut -d/ -f1)
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layer=$(echo $src | sed "s|$srcdir/||")
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layerfile=$(echo $layer | sed 's|/|-|g')
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ex tar -C $j/$srcdir -cpf $dstdir/$srcdir-$layerfile.tar $layer
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}
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jaildk_freeze() {
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jail=$1
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shift
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VERSION=""
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ADDBASE=""
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ADDAPPL=""
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while getopts "abv:" arg; do
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case $arg in
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a) ADDAPPL=1;;
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b) ADDBASE=1;;
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v) VERSION=${OPTARG};;
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*) freeze_usage;;
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esac
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done
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if test -z "$jail"; then
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freeze_usage
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fi
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die_if_not_exist $jail "Jail to freeze" $VERSION
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if jls | egrep -q "${jail}"; then
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echo "The jail $jail is actually running. It's recommended"
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echo -n "to stop it before freezing. Stop the jail now [Ny]? "
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read yesno
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case $yesno in
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y|Y|yes|YES|Yes)
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service jail stop $jail
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;;
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esac
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fi
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load-jail-config $jail
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if test -n "$VERSION"; then
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version=$VERSION
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fi
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bold "Freezing jail $jail $version"
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host=$(hostname | cut -d\. -f1)
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freeze=$j/images/$host-$jail-$version.tgz
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tmp=$j/images/tmp/$jail-$version
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ex mkdir -p $tmp
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mountconf=$j/etc/$jail/mount.conf
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if ! test -e "$mountconf"; then
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die "$mountconf doesn't exist!"
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fi
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# create sub tarballs from every layer
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grep -v "#" $mountconf | while read LINE; do
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# this is a copy of the code in jaildk_rc_mount()
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# FIXME: put this into a function somehow
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set -- $(eval echo \""$LINE"\")
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# Skip empty lines:
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case "$1" in
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"") continue ;;
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esac
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src=$1
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dest=$2
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fs=$3
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opts=$4
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size=$5
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perm=$6
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case $fs in
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nullfs)
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if ! echo $src | egrep -q "^/"; then
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# only freeze nullfs mounts relative to $j
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if echo $src | egrep -q "^base/"; then
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if test -n "$ADDBASE"; then
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freeze_dir $tmp $src
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fi
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elif echo $src | egrep -q "^appl/"; then
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if test -n "$ADDAPPL"; then
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freeze_dir $tmp $src
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fi
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else
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freeze_dir $tmp $src
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fi
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fi
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;;
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esac
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done
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# add the jail config
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files=$(find $j/etc/$jail -type f -maxdepth 1)
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for file in $files; do
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cp -pP $file $tmp/
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done
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# build the final image file
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ex tar -C $j/images/tmp -cpf $freeze $jail-$version
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# cleaning up
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ex rm -rf $j/images/tmp
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bold "Done, jail $jail frozen to $freeze."
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}
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thaw_tarball() {
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srcdir=$1
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tarball=$2
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# etc-test-local-etc-20201128.tar
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layer=$(echo $tarball | cut -d\- -f1)
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if ! test -d $j/$layer; then
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ex mkdir -p $j/$layer
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fi
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ex tar -C $j/$layer -xf $srcdir/$tarball
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ex rm -f $srcdir/$tarball
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}
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jaildk_thaw() {
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image=$1
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J=$2 # just for testing
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if test -n "$J"; then
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j=$J
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fi
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jail=$(echo $image | cut -d\- -f2)
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version=$(echo $image | cut -d\- -f3 | cut -d\. -f1)
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if ! test -n "$version" -o -n "$jail"; then
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err "Usage: $0 thaw <image>"
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die "Image filename pattern: <host>-<jail>-<version>.tgz"
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fi
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if test -d $j/etc/$jail/etc-$version; then
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bold -n "Jail $jail $version already exists, overwrite [Ny]? "
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read yesno
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case $yesno in
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y|Y|yes|YES|Yes)
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:;;
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*)
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echo "abort.";;
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esac
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fi
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bold "Thawing jail $image"
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tmp=$j/images/tmp
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ex mkdir -p $tmp
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# too many things can go wrong from here, so better abort on error
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set -e
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ex tar -C $tmp -xf $image
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if ! test -d $tmp/$jail-$version; then
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die "Invalid image format!"
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ex rm -rf $tmp
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fi
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for tarball in `cd $tmp/$jail-$version && ls *.tar`; do
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thaw_tarball $tmp/$jail-$version $tarball
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done
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files=$(find $tmp -type f)
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bak=""
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if test -e $j/etc/$jail/jail.conf; then
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bold -n "$j/etc/$jail/jail.conf already exist. Overwrite configs [Ny]? "
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read yesno
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case $yesno in
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y|Y|yes|YES|Yes)
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:;;
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*)
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bold "Copying configs with extension -$version"
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bak="-$version"
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;;
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esac
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fi
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for file in $files; do
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filename=$(basename $file)
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ex cp -Pp $file $j/etc/$jail/$filename$bak
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done
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bold "Done. Thawed jail $jail $version from $image."
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}
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##########################
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#
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# main()
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@@ -1110,7 +1328,7 @@ case $runner in
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start|stop|status|restart)
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jaildk_jail $runner $*
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;;
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setup|reinstall|install|uninstall|build|blogin|login|clone|create|remove|rc|base|fetch)
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setup|reinstall|install|uninstall|build|blogin|login|clone|create|remove|rc|base|fetch|freeze|thaw)
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jaildk_$runner $*
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;;
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*)
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