mariadb: Do not use wsrep-notify.sh on Debian

Closes-Bug: #1947534

Change-Id: I08be074c3633cc4fb0a0bc6c9cb8d03eb5226d89
(cherry picked from commit b6b7401)

Author: mnasiadka

ansible/roles/mariadb/defaults/main.yml

@@ -21,7 +21,7 @@ mariadb_services:
         backend_tcp_extra:
           - "option srvtcpka"
           - "timeout server 3600s"
-          - "option {% if enable_mariadb_clustercheck | bool %}httpchk{% else %}mysql-check user haproxy post-41{% endif %}"
+          - "{% if enable_mariadb_clustercheck | bool %}option httpchk{% else %}{% if kolla_base_distro != 'debian' %}option mysql-check user haproxy post-41{% endif %}{% endif %}"
         custom_member_list: "{{ internal_haproxy_members.split(';') }}"
       mariadb_external_lb:
         enabled: "{{ enable_external_mariadb_load_balancer|bool }}"
@@ -57,8 +57,8 @@ database_max_timeout: 120
 ####################
 # HAProxy
 ####################
-internal_haproxy_members: "{% for host in mariadb_default_database_shard_hosts %} server {{ hostvars[host].ansible_facts.hostname }} {{ 'api' | kolla_address(host) }}:{{ mariadb_port }} check {% if enable_mariadb_clustercheck | bool %}port {{ mariadb_clustercheck_port }}{% endif %} inter 2000 rise 2 fall 5{% if not loop.first %} backup{% endif %};{% endfor %}"
-external_haproxy_members: "{% for host in mariadb_default_database_shard_hosts %} server {{ host }} {{ host }}:{{ mariadb_port }} check {% if enable_mariadb_clustercheck | bool %}port {{ mariadb_clustercheck_port }}{% endif %} inter 2000 rise 2 fall 5{% if not loop.first %} backup{% endif %};{% endfor %}"
+internal_haproxy_members: "{% for host in mariadb_default_database_shard_hosts %} server {{ hostvars[host].ansible_facts.hostname }} {{ 'api' | kolla_address(host) }}:{{ mariadb_port }} check {% if enable_mariadb_clustercheck | bool %}port {{ mariadb_clustercheck_port }}{% else %}{% if kolla_base_distro == 'debian' %}port {{ mariadb_port }}{% endif %}{% endif %} inter 2000 rise 2 fall 5{% if not loop.first %} backup{% endif %};{% endfor %}"
+external_haproxy_members: "{% for host in mariadb_default_database_shard_hosts %} server {{ host }} {{ host }}:{{ mariadb_port }} check {% if enable_mariadb_clustercheck | bool %}port {{ mariadb_clustercheck_port }}{% else %}{% if kolla_base_distro == 'debian' %}port {{ mariadb_port }}{% endif %}{% endif %} inter 2000 rise 2 fall 5{% if not loop.first %} backup{% endif %};{% endfor %}"
 
 ####################
 # Docker

ansible/roles/mariadb/tasks/config.yml

@@ -98,6 +98,7 @@
     - inventory_hostname in groups[item.value.group]
     - item.value.enabled | bool
     - not enable_mariadb_clustercheck | bool
+    - kolla_base_distro != 'debian'
   with_dict: "{{ mariadb_services }}"
   notify:
     - restart mariadb

ansible/roles/mariadb/templates/galera.cnf.j2

@@ -40,7 +40,7 @@ wsrep_node_name={{ ansible_facts.hostname }}
 wsrep_sst_method={{ sst_method }}
 wsrep_sst_auth={{ database_user }}:{{ database_password }}
 wsrep_slave_threads=4
-{% if not enable_mariadb_clustercheck | bool %}
+{% if not enable_mariadb_clustercheck | bool and kolla_base_distro != 'debian' %}
 wsrep_notify_cmd=/usr/local/bin/wsrep-notify.sh
 {% endif %}
 wsrep_on = ON

ansible/roles/mariadb/templates/mariadb.json.j2

@@ -7,7 +7,8 @@
             "dest": "/etc/{{ mysql_dir }}/my.cnf",
             "owner": "mysql",
             "perm": "0600"
-        }{% if not enable_mariadb_clustercheck | bool %},
+        }{% if not enable_mariadb_clustercheck | bool and kolla_base_distro != 'debian' %},
+        }
         {
             "source": "{{ container_config_directory }}/wsrep-notify.sh",
             "dest": "/usr/local/bin/wsrep-notify.sh",

releasenotes/notes/bug-1947534-bf3b5ed19473015f.yaml

@@ -0,0 +1,6 @@
+---
+fixes:
+  - |
+    Fixes an issue on Debian with single node MariaDB deployments with
+    HAProxy disabled.
+    See `bug 1947534 <https://launchpad.net/bugs/1947534>`__ for details.