Mount /var/lib/neutron in neutron agents for metadata proxy

The metadata agent creates domain socket /var/lib/neutron/metadata_proxy
that is used for communication with haproxy in the L3 and DHCP agents.
This patch adds creation of /var/lib/neutron if it doesn't exist and
mounts it into the L3, DHCP and metadata agent containers.

Change-Id: Id8b8487b5a6a288e5ef1ca1c7d5b47a59cc8dea2
Closes-Bug: #1705289

docker/services/neutron-dhcp.yaml

@@ -81,6 +81,9 @@ outputs:
             - path: /var/log/neutron
               owner: neutron:neutron
               recurse: true
+            - path: /var/lib/neutron
+              owner: neutron:neutron
+              recurse: true
       docker_config:
         step_4:
           neutron_dhcp:
@@ -97,10 +100,15 @@ outputs:
                   - /var/lib/config-data/puppet-generated/neutron/:/var/lib/kolla/config_files/src:ro
                   - /lib/modules:/lib/modules:ro
                   - /run/:/run
+                  - /var/lib/neutron:/var/lib/neutron
                   - /var/log/containers/neutron:/var/log/neutron
             environment:
               - KOLLA_CONFIG_STRATEGY=COPY_ALWAYS
       host_prep_tasks:
+        - name: create /var/lib/neutron
+          file:
+            path: /var/lib/neutron
+            state: directory
         - name: create persistent logs directory
           file:
             path: /var/log/containers/neutron

docker/services/neutron-l3.yaml

@@ -77,6 +77,9 @@ outputs:
             - path: /var/log/neutron
               owner: neutron:neutron
               recurse: true
+            - path: /var/lib/neutron
+              owner: neutron:neutron
+              recurse: true
       docker_config:
         step_4:
           neutron_l3_agent:
@@ -93,10 +96,15 @@ outputs:
                   - /var/lib/config-data/puppet-generated/neutron/:/var/lib/kolla/config_files/src:ro
                   - /lib/modules:/lib/modules:ro
                   - /run:/run
+                  - /var/lib/neutron:/var/lib/neutron
                   - /var/log/containers/neutron:/var/log/neutron
             environment:
               - KOLLA_CONFIG_STRATEGY=COPY_ALWAYS
       host_prep_tasks:
+        - name: create /var/lib/neutron
+          file:
+            path: /var/lib/neutron
+            state: directory
         - name: create persistent logs directory
           file:
             path: /var/log/containers/neutron

docker/services/neutron-metadata.yaml

@@ -77,6 +77,9 @@ outputs:
             - path: /var/log/neutron
               owner: neutron:neutron
               recurse: true
+            - path: /var/lib/neutron
+              owner: neutron:neutron
+              recurse: true
       docker_config:
         step_4:
           neutron_metadata_agent:
@@ -93,10 +96,15 @@ outputs:
                   - /var/lib/config-data/puppet-generated/neutron/:/var/lib/kolla/config_files/src:ro
                   - /lib/modules:/lib/modules:ro
                   - /run:/run
+                  - /var/lib/neutron:/var/lib/neutron
                   - /var/log/containers/neutron:/var/log/neutron
             environment:
               - KOLLA_CONFIG_STRATEGY=COPY_ALWAYS
       host_prep_tasks:
+        - name: create /var/lib/neutron
+          file:
+            path: /var/lib/neutron
+            state: directory
         - name: create persistent logs directory
           file:
             path: /var/log/containers/neutron