neutron-metadata-agent: copy wrapper script for haproxy processes

In ml2/ovn setups, the neutron-metadata-agent spawns haproxy processes
to serve metadata requests. To run these haproxy instances inside their
own containers, the wrapper script must be available in the
metadata-agent container.
This is a follow up on I679ac66186d457ae53f89469fe22c5662089019a

Change-Id: Ia47af98ff723ebe8ea8461d05a2bc3b58af845f9
Signed-off-by: Maximilian Stinsky <maximilian.stinsky-damke@wiit.cloud>

docker/neutron/neutron-metadata-agent/Dockerfile.j2

@@ -14,6 +14,8 @@ LABEL maintainer="{{ maintainer }}" name="{{ image_name }}" build-date="{{ build
 
 {{ macros.kolla_patch_sources() }}
 
+COPY extend_start.sh /usr/local/bin/kolla_extend_start
+
 {% block neutron_metadata_agent_footer %}{% endblock %}
 {% block footer %}{% endblock %}
 

docker/neutron/neutron-metadata-agent/extend_start.sh

@@ -0,0 +1,18 @@
+#!/bin/bash
+
+if [[ ! -d "/var/log/kolla/neutron" ]]; then
+    mkdir -p /var/log/kolla/neutron
+fi
+if [[ $(stat -c %a /var/log/kolla/neutron) != "755" ]]; then
+    chmod 755 /var/log/kolla/neutron
+fi
+
+if [[ "${KOLLA_NEUTRON_WRAPPERS:-false}" == "true" ]]; then
+    echo "Copying neutron agent wrappers to /usr/local/bin"
+    sudo -E /usr/local/lib/neutron-wrappers/copy-wrappers
+else
+    echo "Removing neutron agent wrappers from /usr/local/bin"
+    sudo -E /usr/local/lib/neutron-wrappers/delete-wrappers
+fi
+
+. /usr/local/bin/kolla_neutron_extend_start

releasenotes/notes/neutron-metadata-agent-wrapper-scripts-d6163080d169ea14.yaml

@@ -0,0 +1,7 @@
+---
+features:
+  - |
+    The neutron wrapper scripts, which were introduced in
+    I679ac66186d457ae53f89469fe22c5662089019a, are now included in the
+    ``neutron-metadata-agent`` container, making it possible to run
+    haproxy processes as separate containers.