fix hardcoded CT uptime in vmstatus

Implement the container uptime by susbtracting the ctime from the
container pid file from the actual time.
This mirrors the behaviour of lxcfs, see get_pid1_time() in lxcfs.c.
This hass some limitations, like frozen or live migrated containers
falsify the real uptime. But as it shows everytime the uptime like
a uptime command in the container would this is forgivable, for now.

Signed-off-by: Thomas Lamprecht <t.lamprecht@proxmox.com>

diff --git a/src/PVE/LXC.pm b/src/PVE/LXC.pm
index 99496f9328fd7e385f1574ab4848ad41de806b20..ccd8c27e593adca0266c2fa19a24f34501c1e0e9 100644 (file)
--- a/src/PVE/LXC.pm
+++ b/src/PVE/LXC.pm
@@ -805,7 +805,9 @@ sub vmstatus {
        my $d = $list->{$vmid};
        next if $d->{status} ne 'running';
 
-       $d->{uptime} = 100; # fixme:
+       my $pid = find_lxc_pid($vmid);
+       my $ctime = (stat("/proc/$pid"))[10]; # 10 = ctime
+       $d->{uptime} = time - $ctime; # the method lxcfs uses
 
        $d->{mem} = read_cgroup_value('memory', $vmid, 'memory.usage_in_bytes');
        $d->{swap} = read_cgroup_value('memory', $vmid, 'memory.memsw.usage_in_bytes') - $d->{mem};