[pve-devel] [PATCH container] vmstatus: include detected IP address of running containers

[Oguz Bektas <o.bektas@proxmox.com>]

add a helper 'find_lxc_ip_address' to fetch IP address of container from
its network namespace using lxc-info.

for the moment it can be queried with the pct tool:
$ pct status 1000 --verbose
cpu: 0
cpus: 1
disk: 6422528
diskread: 368640
diskwrite: 0
ipaddress: 192.168.31.83        <----
maxdisk: 4294967296
maxmem: 536870912
maxswap: 536870912
mem: 864256
name: CT1000
netin: 3281265
netout: 15794
pid: 34897
status: running
swap: 94208
type: lxc
uptime: 11088
vmid: 1000

Signed-off-by: Oguz Bektas <o.bektas@proxmox.com>
---
 src/PVE/LXC.pm | 16 ++++++++++++++++
 1 file changed, 16 insertions(+)

diff --git a/src/PVE/LXC.pm b/src/PVE/LXC.pm
index 139f901..e7804e0 100644
--- a/src/PVE/LXC.pm
+++ b/src/PVE/LXC.pm
@@ -247,6 +247,8 @@ sub vmstatus {
 
 	next if !$pid; # skip stopped CTs
 
+	$d->{ipaddress} = find_lxc_ip_address($vmid);
+
 	my $proc_pid_stat = PVE::ProcFSTools::read_proc_pid_stat($pid);
 	$d->{uptime} = int(($uptime - $proc_pid_stat->{starttime}) / $clock_ticks); # the method lxcfs uses
 
@@ -397,6 +399,20 @@ sub open_ppid {
     return ($ppid, $fd);
 }
 
+sub find_lxc_ip_address {
+    my ($vmid) = @_;
+
+    my $ip = undef;
+
+    my $parser = sub {
+	my $line = shift;
+	$ip = $1 if $line =~ m/^IP:\s+(.*)$/;
+    };
+
+    PVE::Tools::run_command(['lxc-info', '-n', $vmid, '--ips'], outfunc => $parser, errfunc => sub {});
+    return $ip;
+}
+
 # Note: we cannot use Net:IP, because that only allows strict
 # CIDR networks
 sub parse_ipv4_cidr {
-- 
2.30.2