ansible-roles/roles/mysql_server/templates/pre-backup.j2

#!/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