Remove Docker Swarm bits

Docker Swarm was effectively deprecated in [1], so it can be safely
removed now.

[1] https://review.opendev.org/c/openstack/openstack-ansible-os_zun/+/936400

Change-Id: I739300a5b4bdcac0a6eef0df5a6f38f16fb45b67
Signed-off-by: Dmitriy Rabotyagov <dmitriy.rabotyagov@cleura.com>

defaults/main.yml

@@ -395,18 +395,12 @@ zun_kuryr_init_defaults:
     Group: "{{ zun_kuryr_system_group_name }}"
     User: "{{ zun_kuryr_system_user_name }}"
 
-# Key-value storage for docker swarm standalone mode.
-# Possible options: zk, etcd, consul and null to disable swarm mode
-zun_docker_kv_storage: null
-zun_docker_kv_port: 2379
-zun_docker_kv_group: zun_api
-
 ## Default zun+docker options used within the systemd unit file.
 zun_docker_init_defaults:
   Service:
     ExecStart:
       - ""
-      - "/usr/bin/dockerd --group {{ zun_system_group_name }} -H tcp://{{ zun_docker_bind_host }}:{{ zun_docker_bind_port }} -H unix:///var/run/docker.sock {% if zun_docker_kv_storage %}--cluster-store {{ zun_docker_kv_storage }}://{% for item in groups[zun_docker_kv_group] %}{{ hostvars[item]['management_address'] }}:{{ zun_docker_kv_port }}{% if not loop.last %},{% endif %}{% endfor %}{% endif %}{% if zun_kata_enabled %} --add-runtime kata=/opt/kata/bin/kata-runtime{% endif %}" # noqa: yaml[line-length]
+      - "/usr/bin/dockerd --group {{ zun_system_group_name }} -H tcp://{{ zun_docker_bind_host }}:{{ zun_docker_bind_port }} -H unix:///var/run/docker.sock{% if zun_kata_enabled %} --add-runtime kata=/opt/kata/bin/kata-runtime{% endif %}" # noqa: yaml[line-length]
 
 ## Tunable overrides for service unit files.
 zun_api_paste_ini_overrides: {}

releasenotes/notes/docker_swarm_removal-c1e0206bc67feded.yaml

@@ -0,0 +1,9 @@
+---
+
+deprecations:
+  - |
+    Variables ``zun_docker_kv_storage``, ``zun_docker_kv_port`` and
+    ``zun_docker_kv_group`` were removed and have no effect anymore.
+  - |
+    Docker Swarm mode for Zun is no longer supported and only local
+    deployment for Docker is possible.

templates/kuryr-libnetwork.conf.j2

@@ -10,11 +10,6 @@ bindir = {{ zun_bin | dirname }}/libexec/kuryr
 # Kuryr URL for accessing Kuryr through json rpc. (string value)
 kuryr_uri = http://{{ zun_kuryr_service_address }}:{{ zun_kuryr_service_port }}
 
-{% if zun_docker_kv_storage %}
-# Kuryr plugin scope reported to libnetwork. (string value)
-capability_scope = global
-{% endif %}
-
 # Do processing external connectivity (boolean value)
 process_external_connectivity = false