Add /run/netns bindmount to Neutron containers

Closes-Bug: #1864856
Change-Id: I725eeb18a22b3fa7838f16761d19f7e699ab5e82

ansible/roles/neutron/defaults/main.yml

@@ -245,6 +245,7 @@ neutron_dhcp_agent_default_volumes:
   - "{{ node_config_directory }}/neutron-dhcp-agent/:{{ container_config_directory }}/:ro"
   - "/etc/localtime:/etc/localtime:ro"
   - "neutron_metadata_socket:/var/lib/neutron/kolla/"
+  - "/run/netns:/run/netns:shared"
   - "kolla_logs:/var/log/kolla/"
   - "{{ kolla_dev_repos_directory ~ '/neutron/neutron:/var/lib/kolla/venv/lib/python' ~ distro_python_version ~ '/site-packages/neutron' if neutron_dev_mode | bool else '' }}"
 neutron_l3_agent_default_volumes:
@@ -252,6 +253,7 @@ neutron_l3_agent_default_volumes:
   - "/etc/localtime:/etc/localtime:ro"
   - "/lib/modules:/lib/modules:ro"
   - "neutron_metadata_socket:/var/lib/neutron/kolla/"
+  - "/run/netns:/run/netns:shared"
   - "kolla_logs:/var/log/kolla/"
   - "{{ kolla_dev_repos_directory ~ '/neutron/neutron:/var/lib/kolla/venv/lib/python' ~ distro_python_version ~ '/site-packages/neutron' if neutron_dev_mode | bool else '' }}"
 neutron_sriov_agent_default_volumes:

releasenotes/notes/bug-1861792-a44a31693b0c786f.yaml

@@ -2,4 +2,5 @@
 fixes:
   - |
     Remove /run bind mounts in Neutron services causing dbus host-level
-    errors `LP# 1861792 <https://launchpad.net/bugs/1861792>`.
+    errors and add /run/netns for neutron-dhcp-agent and neutron-l3-agent.
+    `LP# 1861792 <https://launchpad.net/bugs/1861792>`__