Add mariadb_packages_extra for installing additional packages

Optional list appended to the package install on all supported OS
families, so extra packages resolve in the same transaction as the
MariaDB server packages and are present before the configuration step.
Useful for packages the server config depends on at (re)start, e.g.
the compression provider plugins (mariadb-plugin-provider-*) that are
split out of mariadb-server in the MariaDB repositories since 10.7 and
are required when mariadb.cnf loads them via plugin_load_add.

README.md

@@ -138,6 +138,16 @@ mariadb_bind_address: 127.0.0.1
 mariadb_unix_socket: "default value depends on OS"
 ```
 
+Extra distribution packages can be installed together with the MariaDB server
+packages (same transaction, before configuration), e.g. the compression
+provider plugins when the configuration loads them via `plugin_load_add`:
+
+```yaml
+mariadb_packages_extra: []
+# mariadb_packages_extra:
+#   - mariadb-plugin-provider-lz4
+```
+
 ```yaml
 mariadb_basic_settings_raw: |
   user                  = mysql

defaults/main.yml

@@ -12,6 +12,13 @@ mariadb_use_official_repo_version: 10.6
 # see: https://manpages.debian.org/stable/apt/sources.list.5.en.html#DEB822-STYLE_FORMAT
 mariadb_use_official_repo_format_deb822: false
 
+# Extra distribution packages to install together with the MariaDB server
+# packages (single transaction, before configuration). Useful for packages
+# the server configuration needs at (re)start, e.g. the compression provider
+# plugins (mariadb-plugin-provider-*) that are split out of mariadb-server
+# in the MariaDB repositories since 10.7.
+mariadb_packages_extra: []
+
 mariadb_enabled_on_startup: true
 # The following is set to true by default but you may consider setting it to
 # false on production servers to prevent ansible from restarting mariadb server.

molecule/default/vars/testvars.yml

@@ -3,6 +3,9 @@ mariadb_server_id: 1
 mariadb_bind_address: 0.0.0.0
 mariadb_replication_role: primary
 
+mariadb_packages_extra:
+  - rsync
+
 mariadb_innodb_raw: |
   innodb_buffer_pool_size = 512M
   innodb_log_file_size  = 64M

molecule/default/verify.yml

@@ -2,6 +2,7 @@
 - name: Verify
   hosts: all
   gather_facts: true
+  vars_files: vars/testvars.yml
 
   tasks:
     - name: Include OS vars
@@ -19,6 +20,20 @@
         that: not pkg_status.changed
         fail_msg: "{{ mariadb_server_package }} is not installed"
 
+    - name: Verify extra packages status
+      ansible.builtin.package:
+        name: "{{ mariadb_packages_extra }}"
+        state: present
+      check_mode: true
+      register: extra_pkg_status
+      when: mariadb_packages_extra | default([]) | length > 0
+
+    - name: Check that extra packages are installed
+      ansible.builtin.assert:
+        that: not extra_pkg_status.changed
+        fail_msg: "extra packages {{ mariadb_packages_extra }} are not installed"
+      when: mariadb_packages_extra | default([]) | length > 0
+
     - name: Register {{ mariadb_config_file }}
       ansible.builtin.stat:
         path: "{{ mariadb_config_file }}"

tasks/setup_alpine.yml

@@ -1,11 +1,7 @@
 ---
 - name: Install packages (package)
   ansible.builtin.package:
-    name:
-      - "{{ mariadb_server_package }}"
-      - mariadb-backup
-      - mariadb-client
-      - py3-pymysql
+    name: "{{ [mariadb_server_package, 'mariadb-backup', 'mariadb-client', 'py3-pymysql'] + mariadb_packages_extra }}"
     state: present
   notify: Setup MariaDB
 

tasks/setup_debian.yml

@@ -77,9 +77,6 @@
 
 - name: Install packages (apt)
   ansible.builtin.apt:
-    package:
-      - "{{ mariadb_server_package }}"
-      - mariadb-backup
-      - python3-pymysql
+    package: "{{ [mariadb_server_package, 'mariadb-backup', 'python3-pymysql'] + mariadb_packages_extra }}"
     state: present
     update_cache: true

tasks/setup_redhat.yml

@@ -22,19 +22,13 @@
 
 - name: Install packages (dnf)
   ansible.builtin.dnf:
-    name:
-      - "{{ mariadb_server_package }}"
-      - mariadb-backup
-      - python3-PyMySQL
+    name: "{{ [mariadb_server_package, 'mariadb-backup', 'python3-PyMySQL'] + mariadb_packages_extra }}"
     state: present
   when: not mariadb_use_official_repo
 
 - name: Install packages (dnf/mdbf repo)
   ansible.builtin.dnf:
-    name:
-      - "{{ mariadb_server_package_mdbf }}"
-      - MariaDB-backup
-      - python3-PyMySQL
+    name: "{{ [mariadb_server_package_mdbf, 'MariaDB-backup', 'python3-PyMySQL'] + mariadb_packages_extra }}"
     state: present
   when: mariadb_use_official_repo