nixos/libvirtd: refresh LXC emulator path on startup

This fixes the issue when the LXC emulator binary is garbage collected
and breaks libvirtd containers, because libvirtd XML file still refers
to GC'ed store path.

We already have a fix for QEMU, this commit extends the fix to cover LXC
too.
This commit is contained in:
Bjørn Forsman 2014-09-15 23:03:20 +02:00
parent 3e5bcdc327
commit 0bfd27535f

View file

@ -129,12 +129,12 @@ in
# config file. But this path can unfortunately be garbage collected
# while still being used by the virtual machine. So update the
# emulator path on each startup to something valid (re-scan $PATH).
for file in /etc/libvirt/qemu/*.xml; do
for file in /etc/libvirt/qemu/*.xml /etc/libvirt/lxc/*.xml; do
test -f "$file" || continue
# get (old) emulator path from config file
emulator=$(grep "^[[:space:]]*<emulator>" "$file" | sed 's,^[[:space:]]*<emulator>\(.*\)</emulator>.*,\1,')
# get a (definitely) working emulator path by re-scanning $PATH
new_emulator=$(command -v $(basename "$emulator"))
new_emulator=$(PATH=${pkgs.libvirt}/libexec:$PATH command -v $(basename "$emulator"))
# write back
sed -i "s,^[[:space:]]*<emulator>.*, <emulator>$new_emulator</emulator> <!-- WARNING: emulator dirname is auto-updated by the nixos libvirtd module -->," "$file"
done