Update to 2021-12-01 19:13

roles/mysql_server/templates/my.cnf.j2

@@ -0,0 +1,47 @@
+[mysqld]
+datadir=/var/lib/mysql
+socket=/var/lib/mysql/mysql.sock
+symbolic-links=0
+{% if not mysql_networking | default(False) %}
+skip-networking
+{% endif %}
+{% if mysql_innodb_file_per_table | default(True) %}
+innodb_file_per_table
+{% endif %}
+{% if mysql_innodb_buffer_pool_size is defined %}
+innodb_buffer_pool_size={{ mysql_innodb_buffer_pool_size }}
+{% endif %}
+{% if mysql_innodb_buffer_pool_instances is defined %}
+innodb_buffer_pool_instances={{ mysql_innodb_buffer_pool_instances }}
+{% endif %}
+{% if mysql_innodb_log_buffer_size is defined %}
+innodb_log_buffer_size={{ mysql_innodb_log_buffer_size }}
+{% endif %}
+{% if mysql_innodb_flush_log_at_trx_commit is defined %}
+innodb_flush_log_at_trx_commit={{ mysql_innodb_flush_log_at_trx_commit }}
+{% endif %}
+{% if mysql_innodb_flush_method is defined %}
+innodb_flush_method={{ mysql_innodb_flush_method }}
+{% endif %}
+{% if mysql_innodb_log_file_size is defined %}
+innodb_log_file_size={{ mysql_innodb_log_file_size }}
+{% endif %}
+
+{% if mysql_sql_mode | length > 0 %}
+sql_mode = {{ mysql_sql_mode | join(',') }}
+{% endif %}
+
+max_allowed_packet={{ mysql_max_allowed_packet | default('16M') }}
+open_files_limit={{ mysql_open_files_limit | default('8192') }}
+max_connections={{ mysql_max_connections | default('300') }}
+
+[mysqld_safe]
+{% if mysql_engine == 'mysql' %}
+log-error=/var/log/mysql/mysqld.log
+pid-file=/var/run/mysqld/mysqld.pid
+{% else %}
+log-error=/var/log/mariadb/mariadb.log
+pid-file=/var/run/mariadb/mariadb.pid
+{% endif %}
+
+!includedir /etc/my.cnf.d

roles/mysql_server/templates/post-backup.j2

@@ -0,0 +1,7 @@
+#!/bin/sh
+
+set -e
+
+{% if mysql_remove_dump_after_backup | default(True) %}
+rm -f /home/lbkp/mysql/*.sql*
+{% endif %}

roles/mysql_server/templates/pre-backup.j2

@@ -0,0 +1,46 @@
+#!/bin/sh
+
+set -eo pipefail
+
+# Get the .my.cnf from root
+HOME=/root
+PATH=/usr/bin:$PATH
+DEST=/home/lbkp/mysql
+
+[ -d $DEST ] || mkdir -p $DEST
+
+for DB in $(/usr/bin/mysqlshow | /bin/awk '{print $2}' | /bin/grep -v Databases)
+do
+  if [[ "$DB" == "information_schema" ]]; then
+    continue
+  fi
+{% for db in mysql_skip_backup %}
+  # {{ db }} is configured not to be backed up
+  if [[ "$DB" == "{{ db }}" ]]; then
+    echo "Skiping $DB as per configuration"
+    continue
+  fi
+{% endfor %}
+{% if mysql_compress_cmd %}
+{% if mysql_compress_cmd is search('p?xz') %}
+{% set compext = 'xz' %}
+{% elif mysql_compress_cmd is search('p?bzip2') %}
+{% set compext = 'bz2' %}
+{% elif mysql_compress_cmd is search('(pi)?gz') %}
+{% set compext = 'gz' %}
+{% elif mysql_compress_cmd is search('lzop') %}
+{% set compext = 'lzo' %}
+{% elif mysql_compress_cmd is search('lz4') %}
+{% set compext = 'lz4' %}
+{% elif mysql_compress_cmd is search('zstd') %}
+{% set compext = 'zst' %}
+{% else %}
+{% set compext = 'z' %}
+{% endif %}
+  echo "Dumping $DB to $DEST/$DB.sql.{{ compext }}"
+  /usr/bin/mysqldump --ignore-table=mysql.event --single-transaction --add-drop-table $DB | /bin/nice -n 10 {{ mysql_compress_cmd }} > $DEST/$DB.sql.{{ compext }}
+{% else %}
+  echo "Dumping $DB to $DEST/$DB.sql"
+  /usr/bin/mysqldump --ignore-table=mysql.event --single-transaction --add-drop-table $DB -r $DEST/$DB.sql
+{% endif %}
+done

roles/mysql_server/templates/root_my.cnf.j2

@@ -0,0 +1,2 @@
+[client]
+password={{ my_root_pass.stdout }}

roles/mysql_server/templates/systemd_limits.conf.j2

@@ -0,0 +1,5 @@
+[Service]
+LimitNOFILE={{ mysql_open_files_limit | default('8192') }}
+Restart=on-failure
+StartLimitInterval=0
+RestartSec=1