software/kvm: correctly setup network inside of the VM

don't add automatic route when adding IP address on interface because
the automatic route doesn't add "via XXXXXX" gateway option.

In KVM setup, the host machine is the gateway. We need to go through the
gateway because we can't reach directly the other VM running on
different slaptap interfaces.

software/kvm/buildout.hash.cfg

@@ -19,7 +19,7 @@ md5sum = 092405e2fba77c22d4dc8cefcab677d8
 
 [template-kvm]
 filename = instance-kvm.cfg.jinja2
-md5sum = 0db4ed796808b892a2e8a0aea704b13e
+md5sum = 285558df4686116a92b39250f9e00f07
 
 [template-kvm-cluster]
 filename = instance-kvm-cluster.cfg.jinja2.in

software/kvm/instance-kvm.cfg.jinja2

@@ -539,7 +539,8 @@ ipv6-network-info =
 recipe = plone.recipe.command
 filename = netconfig.sh
 path = ${directory:public}/${:filename}
-ipv4-add-address = ip -4 address add {{ slap_configuration.get('tap-ipv4-addr') }}/{{ slap_configuration.get('tap-ipv4-netmask') }} dev \$IFACE
+ipv4-add-address = ip -4 address add {{ slap_configuration.get('tap-ipv4-addr') }}/{{ slap_configuration.get('tap-ipv4-netmask') }} dev \$IFACE noprefixroute
+ipv4-add-gateway-route = ip -4 address add {{ slap_configuration.get('tap-ipv4-gateway') }} dev \$IFACE
 {%   if nat_restrict == 'true' -%}
 ipv4-add-default-route = ip route add default via {{ slap_configuration.get('tap-ipv4-gateway') }} dev \$IFACE
 {%   elif global_ipv4_prefix -%}
@@ -556,6 +557,7 @@ command =
   ip a | grep eth0: && [ \$IFACE = ens3 ] && IFACE=eth0
   ip a | grep eth1: && [ \$IFACE = ens4 ] && IFACE=eth1
   ${:ipv4-add-address}
+  ${:ipv4-add-gateway-route}
   ${:ipv4-add-default-route}
   ${:ipv4-set-link-up}
   EOF