CI: Add addressing on external network

This is to allow CI testing of network connectivity.

Note only "primary" node gets an address on it.
Hence, "primary" becomes our fake external router.

Depends-on: https://review.opendev.org/709361

Change-Id: I05592888796107d6de95b940c42b2bff73ac0669

tests/init-core-openstack.sh

@@ -12,6 +12,19 @@ function init_runonce {
 
     echo "Initialising OpenStack resources via init-runonce"
     tools/init-runonce &> /tmp/logs/ansible/init-runonce
+
+    echo "Setting address on the external network bridge"
+    if [[ $SCENARIO == "linuxbridge" ]]; then
+        # NOTE(yoctozepto): linuxbridge agent manages its bridges by itself
+        # hence, we need to find the current name of the external network bridge
+        devname=$(basename $(readlink /sys/class/net/${EXT_NET_SLAVE_DEVICE}/master))
+    else
+        devname=br-ex
+        # NOTE(yoctozepto): ovs virtual interfaces are down (not used) by default
+        # hence, we need to bring the external network bridge up
+        sudo ip link set ${devname} up
+    fi
+    sudo ip addr add ${EXT_NET_LOCAL_ADDR} dev ${devname}
 }
 
 

tests/pre.yml

@@ -16,6 +16,8 @@
         managed_network_prefix: "{{ api_network_prefix }}"
         managed_network_prefix_length: "{{ api_network_prefix_length }}"
         managed_network_address_family: "{{ address_family }}"
+    # NOTE(yoctozepto): no addressing for neutron_external_interface in here
+    # because it is enslaved by a bridge
     - role: multi-node-vxlan-overlay
       vars:
         vxlan_interface_name: "{{ neutron_external_interface_name }}"

tests/run.yml

@@ -356,6 +356,13 @@
             cmd: init-core-openstack.sh
             executable: /bin/bash
             chdir: "{{ kolla_ansible_src_dir }}"
+          environment:
+            EXT_NET_CIDR: "{{ neutron_external_network_prefix }}0/{{ neutron_external_network_prefix_length }}"
+            EXT_NET_RANGE: "start={{ neutron_external_network_prefix }}150,end={{ neutron_external_network_prefix }}199"
+            EXT_NET_GATEWAY: "{{ neutron_external_network_prefix }}1"
+            EXT_NET_LOCAL_ADDR: "{{ neutron_external_network_prefix }}1/{{ neutron_external_network_prefix_length }}"
+            EXT_NET_SLAVE_DEVICE: "{{ neutron_external_interface_name }}"
+            SCENARIO: "{{ scenario }}"
           when: openstack_core_tested or scenario in ['ironic', 'scenario_nfv', 'zun']
 
         - name: Run test-core-openstack.sh script

zuul.d/base.yaml

@@ -32,6 +32,8 @@
       api_interface_name: vxlan0
       kolla_internal_vip_address: "192.0.2.10"
       address_family: 'ipv4'
+      neutron_external_network_prefix: "198.51.100."
+      neutron_external_network_prefix_length: "24"
       neutron_external_interface_name: vxlan1
       tls_enabled: false
     roles: