Skip IP address allocation and configuration if needed

Sometimes some hosts should be configured with an interface without any
IP address set (e.g. bridged interface) and to achieve that this change
adds the new attribute 'no_ip' for the network configuration. Also the
change contain a test for this.

Change-Id: I2c9dfeca7f0d37a96f9cbd9df51d94098cf07258
Signed-off-by: Maksim Malchuk <maksim.malchuk@gmail.com>

ansible/ip-allocation.yml

@@ -27,6 +27,7 @@
       when:
         - item | net_cidr != None
         - item | net_bootproto != 'dhcp'
+        - not item | net_no_ip | bool
   roles:
     - role: ip-allocation
       ip_allocation_filename: "{{ kayobe_env_config_path }}/network-allocation.yml"

doc/source/configuration/reference/network.rst

@@ -83,6 +83,9 @@ supported:
 ``libvirt_network_name``
     A name to give to a Libvirt network representing this network on the seed
     hypervisor.
+``no_ip``
+    Whether to allocate an IP address for this network. If set to ``true``, an
+    IP address will not be allocated.
 
 Configuring an IP Subnet
 ------------------------

kayobe/plugins/filter/networks.py

@@ -174,6 +174,11 @@ def net_interface(context, name, inventory_hostname=None):
     return net_attr(context, name, 'interface', inventory_hostname)
 
 
+@jinja2.contextfilter
+def net_no_ip(context, name, inventory_hostname=None):
+    return net_attr(context, name, 'no_ip', inventory_hostname)
+
+
 @jinja2.contextfilter
 def net_cidr(context, name, inventory_hostname=None):
     return net_attr(context, name, 'cidr', inventory_hostname)
@@ -673,6 +678,7 @@ def get_filters():
         'net_fqdn': _make_attr_filter('fqdn'),
         'net_ip': net_ip,
         'net_interface': net_interface,
+        'net_no_ip': net_no_ip,
         'net_cidr': net_cidr,
         'net_mask': net_mask,
         'net_prefix': net_prefix,

playbooks/kayobe-overcloud-host-configure-base/overrides.yml.j2

@@ -18,6 +18,7 @@ controller_extra_network_interfaces:
   - test_net_bridge_vlan
   - test_net_bond
   - test_net_bond_vlan
+  - test_net_bridge_noip
 
 # Custom IP routing tables.
 network_route_tables:
@@ -72,6 +73,12 @@ test_net_bond_vlan_interface: "{% raw %}{{ test_net_bond_interface }}.{{ test_ne
 test_net_bond_vlan_vlan: 44
 test_net_bond_vlan_zone: public
 
+# br1: Bridge interface without IP address.
+test_net_bridge_noip_cidr: 192.168.40.0/24
+test_net_bridge_noip_interface: br1
+test_net_bridge_noip_bridge_ports: [dummy7]
+test_net_bridge_noip_no_ip: true
+
 # Define a software RAID device consisting of two loopback devices.
 controller_mdadm_arrays:
   - name: md0

playbooks/kayobe-overcloud-host-configure-base/pre.yml

@@ -39,4 +39,4 @@
     - name: Ensure dummy network interfaces exist
       command: ip link add dummy{{ item }} type dummy
       become: true
-      loop: "{{ range(2, 7) | list }}"
+      loop: "{{ range(2, 8) | list }}"

playbooks/kayobe-overcloud-host-configure-base/tests/test_overcloud_host_configure.py

@@ -87,6 +87,12 @@ def test_network_bond_vlan(host):
     assert host.file('/sys/class/net/bond0.44/lower_bond0').exists
 
 
+def test_network_bridge_no_ip(host):
+    interface = host.interface('br1')
+    assert interface.exists
+    assert not '192.168.40.1' in interface.addresses
+
+
 def test_additional_user_account(host):
       user = host.user("kayobe-test-user")
       assert user.name == "kayobe-test-user"

releasenotes/notes/ip-allocation-skip-9e81c13324b7a7e1.yaml

@@ -0,0 +1,6 @@
+---
+features:
+  - |
+    The new filter ``net_no_ip`` adds the attribute ``no_ip`` which can be set
+    to ``true`` to skip IP address allocation and configuration for specific
+    networks.