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Don't use machinectl to shut down containers

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If the host is shutting down, machinectl may fail because it's
bus-activated and D-Bus will be shutting down. So just send a signal
to the leader process directly.

Fixes #6212.
This commit is contained in:
Eelco Dolstra 2015-02-28 19:20:13 +01:00
parent e3c2b4ecbf
commit 307064ceb5
1 changed files with 12 additions and 2 deletions
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14
nixos/modules/virtualisation/containers.nix
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@ -203,7 +203,7 @@ in
script =
''
mkdir -p -m 0755 "$root/etc" "$root/var/lib"
mkdir -p -m 0700 "$root/var/lib/private" "$root/root"
mkdir -p -m 0700 "$root/var/lib/private" "$root/root" /run/containers
if ! [ -e "$root/etc/os-release" ]; then
touch "$root/etc/os-release"
fi
@ -261,11 +261,21 @@ in
ip route add $LOCAL_ADDRESS dev $ifaceHost
fi
fi
# Get the leader PID so that we can signal it in
# preStop. We can't use machinectl there because D-Bus
# might be shutting down. FIXME: in systemd 219 we can
# just signal systemd-nspawn to do a clean shutdown.
machinectl show "$INSTANCE" | sed 's/Leader=\(.*\)/\1/;t;d' > "/run/containers/$INSTANCE.pid"
'';
preStop =
''
machinectl poweroff "$INSTANCE" || true
pid="$(cat /run/containers/$INSTANCE.pid)"
if [ -n "$pid" ]; then
kill -RTMIN+4 "$pid"
fi
rm -f "/run/containers/$INSTANCE.pid"
'';
restartIfChanged = false;