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https://gitlab.com/libvirt/libvirt.git
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dba3432b88
Tiny fix for virt-lxc-convert: we are setting memory values in bytes, while free may give us values in a different unit by default: force free to output bytes with -b flag.
128 lines
3.4 KiB
Bash
128 lines
3.4 KiB
Bash
#!/bin/sh
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# lxc_native.c: LXC native configuration import
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#
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# Copyright (c) 2014 SUSE LINUX Products GmbH, Nuernberg, Germany.
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#
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# This library is free software; you can redistribute it and/or
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# modify it under the terms of the GNU Lesser General Public
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# License as published by the Free Software Foundation; either
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# version 2.1 of the License, or (at your option) any later version.
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#
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# This library is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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# Lesser General Public License for more details.
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#
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# You should have received a copy of the GNU Lesser General Public
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# License along with this library. If not, see
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# <http://www.gnu.org/licenses/>.
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#
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# Author: Cedric Bosdonnat <cbosdonnat@suse.com>
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handler_cleanup()
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{
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if test "$conf_dir"; then
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# Remove the temporary config
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rm -r "$conf_dir"
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fi
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}
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trap handler_cleanup INT EXIT
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show_help()
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{
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cat << EOF
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$0 /path/to/lxc/config/file
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Wrapper around virsh domxml-from-native to ease conversion of LXC
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containers configuration to libvirt domain XML.
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EOF
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}
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if test $# != 1; then
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show_help
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exit 1
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fi
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if test "$1" = "--help" || test "$1" = "-h"; then
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show_help
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exit $?
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fi
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conf=$1
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conf_dir=$(mktemp --tmpdir -d virt-lxc-convert-XXX)
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conf_new=$conf_dir/config
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cp "$conf" "$conf_new"
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# Do we have lxc.mount, and is it pointing to a readable file?
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fstab=$(sed -n '/lxc.mount[[:space:]]*=/ s/[[:space:]]*=[[:space:]]*/=/p' \
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"$conf_new" | cut -f 2 -d '=')
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if test -r "$fstab"; then
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sed 's/^lxc.mount[[:space:]]*=.*$//' "$conf_new" >"${conf_new}.tmp"
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mv "${conf_new}.tmp" "${conf_new}"
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sed 's/^\([^#]\)/lxc.mount.entry = \1/' "$fstab" >>"${conf_new}"
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fi
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memory=$(free -b | sed -n '/Mem:/s/ \+/ /gp' | cut -f 2 -d ' ')
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default_tmpfs="size=$((memory/2))"
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# Do we have tmpfs without size param?
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lineno=0
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while read line; do
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lineno=$(expr $lineno + 1)
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has_rel_size=false
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case $line in
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lxc.mount.entry[[:space:]]*=[[:space:]]*tmpfs[[:space:]]*)
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is_tmpfs=true
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;;
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*)
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is_tmpfs=false
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;;
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esac
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# We only care about tmpfs mount entries here
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if ! $is_tmpfs; then
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continue
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fi
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case $line in
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*size=[0-9][0-9]*%*)
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has_rel_size=true
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has_size=true
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;;
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*size=*)
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has_size=true
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;;
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*)
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has_size=false
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;;
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esac
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# Add the default size here (50%) if no size is given
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if ! $has_size; then
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last_option_match="\([[:space:]]*[0-9][[:space:]]*[0-9][::space::]*$\)"
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sed "${lineno}s/$last_option_match/,$default_tmpfs\1/" \
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"$conf_new" >"${conf_new}.tmp"
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mv "${conf_new}.tmp" "${conf_new}"
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fi
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# Convert relative sizes
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if $has_rel_size; then
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percent=$(echo "$line" | sed 's/.*size=\([0-9][0-9]*\)%.*/\1/')
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size="$((memory*percent/100))"
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sed "${lineno}s/size=[0-9]*%/size=${size}/" \
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"$conf_new" >"${conf_new}.tmp"
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mv "${conf_new}.tmp" "${conf_new}"
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fi
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done < "$conf_new"
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# Do we have any memory limit set?
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mem_limit=$(grep 'lxc.cgroup.memory.limit_in_bytes[[:space:]]*=' $conf_new)
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if test -z "$mem_limit"; then
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echo "lxc.cgroup.memory.limit_in_bytes = $memory" >> "$conf_new"
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fi
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virsh -c lxc:/// domxml-from-native lxc-tools $conf_new
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exit $?
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