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postinst: set custom LVM settings

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now that we no longer ship our own LVM packages, set the relevant
filtering options here if they are missing.

for an upgrade from PVE 6.x, the following two scenarios are likely:

A: user edited config provided by our old lvm2 package. it likely
contains our (or a modified) global_filter, but the old scan_lvs
default. in this case we ignore global_filter as long as it contains our
'don't scan zvols' entry, and set scan_lvs to false.

B: config provided by our old lvm2 package was taken over by default
config from stock lvm2 package. scan_lvs defaults to false already, but
global_filter is unset (scan everything), so we need to set our own
global_filter excluding zvols.

other combinations should be handled fine as well.

for new installs (installer, install on top of Debian Bullseye) we are
always in scenario B.

Signed-off-by: Fabian Grünbichler <f.gruenbichler@proxmox.com>
This commit is contained in:
Fabian Grünbichler 2021-06-23 11:00:25 +02:00 committed by Thomas Lamprecht
parent 48197df2b9
commit c690885959
1 changed files with 56 additions and 0 deletions
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56
debian/postinst vendored
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@ -8,6 +8,60 @@ set -e
# done its automatic conffile handling, and all the packages we depend
# of are already fully installed and configured.
set_lvm_conf() {
LVM_CONF_MARKER="# added by pve-manager to avoid scanning"
# only do these changes once
# keep user changes afterwards provided marker is still there..
if ! grep -qLF "$LVM_CONF_MARKER" /etc/lvm/lvm.conf; then
OLD_VALUE="$(lvmconfig --typeconfig full devices/global_filter)"
NEW_VALUE='global_filter=["r|/dev/zd.*|"]'
export LVM_SUPPRESS_FD_WARNINGS=1
# check global_filter
# keep previous setting from our custom packaging if it is still there
if echo "$OLD_VALUE" | grep -qvF 'r|/dev/zd.*|'; then
SET_FILTER=1
BACKUP=1
fi
# should be the default since bullseye
if lvmconfig --typeconfig full devices/scan_lvs | grep -qv 'scan_lvs=0'; then
SET_SCAN_LVS=1
BACKUP=1
fi
if test -n "$BACKUP"; then
echo "Backing up lvm.conf before setting pve-manager specific settings.."
cp -vb /etc/lvm/lvm.conf /etc/lvm/lvm.conf.bak
fi
if test -n "$SET_FILTER"; then
echo "Setting 'global_filter' in /etc/lvm/lvm.conf to prevent zvols from being scanned:"
echo "$OLD_VALUE => $NEW_VALUE"
# comment out existing setting
sed -i -e 's/^\([[:space:]]*global_filter[[:space:]]*=\)/#\1/' /etc/lvm/lvm.conf
# add new section with our setting
cat >> /etc/lvm/lvm.conf <<EOF
devices {
$LVM_CONF_MARKER ZFS zvols
$NEW_VALUE
}
EOF
fi
if test -n "$SET_SCAN_LVS"; then
echo "Adding scan_lvs=0 setting to /etc/lvm/lvm.conf to prevent LVs from being scanned."
# comment out existing setting
sed -i -e 's/^\([[:space:]]*scan_lvs[[:space:]]*=\)/#\1/' /etc/lvm/lvm.conf
# add new section with our setting
cat >> /etc/lvm/lvm.conf <<EOF
devices {
$LVM_CONF_MARKER LVM volumes
scan_lvs=0
}
EOF
fi
fi
}
case "$1" in
triggered)
# We don't print a status message here, as dpkg already said
@ -109,6 +163,8 @@ case "$1" in
fi
fi
set_lvm_conf
if test ! -e /proxmox_install_mode; then
# modeled after code generated by dh_start
for unit in ${UNITS}; do