kvm: check who is using the external port(22, 80, 443)

software/kvm/buildout.hash.cfg

@@ -19,7 +19,7 @@ md5sum = abd8493f35e153a5984ed22c8fe49792
 
 [template-kvm]
 filename = instance-kvm.cfg.jinja2
-md5sum = 2b66607d372ac1bda66a686491dde4d0
+md5sum = fb31648974f531e0196a705d4ffbd125
 
 [template-kvm-cluster]
 filename = instance-kvm-cluster.cfg.jinja2.in

software/kvm/instance-kvm.cfg.jinja2

@@ -518,7 +518,7 @@ recipe = slapos.cookbook:wrapper
 ipv4 = ${slap-network-information:local-ipv4}
 ipv6 = ${slap-network-information:global-ipv6}
 wrapper-path = ${directory:services}/6tunnel-${:ipv6-port}
-command-line = {{ sixtunnel_executable_location }} -6 -4 -d -l ${:ipv6} ${:ipv6-port} ${:ipv4} ${:ipv4-port}
+command-line = lsof -i :${:ipv6-port} ; {{ sixtunnel_executable_location }} -6 -4 -d -l ${:ipv6} ${:ipv6-port} ${:ipv4} ${:ipv4-port}
 hash-existing-files = ${buildout:directory}/software_release/buildout.cfg
 
 {% if use_nat and nat_rule_list -%}