{%- set all_calculated_max_connections = [] %}
{%- for galera_node in galera_cluster_members %}
    {%- set vcpus = hostvars[galera_node]['ansible_processor_vcpus'] %}
    {%- if all_calculated_max_connections.append([[vcpus|default(2), 2] | max, galera_wsrep_slave_threads_max] | min * 100) %}
    {%- endif %}
{%- endfor %}
{%- set calculated_max_connections = all_calculated_max_connections|sort %}

# {{ ansible_managed }}

[client]
port = 3306
socket = /var/run/mysqld/mysqld.sock


[mysqld_safe]
socket = /var/run/mysqld/mysqld.sock
nice = 0
log_error = /var/log/mysql_logs/galera_server_error.log


[mysql]
default-character-set = utf8


[mysqld]
user = mysql
collation-server = utf8_general_ci
init-connect = 'SET NAMES utf8'
character-set-server = utf8
datadir = /var/lib/mysql
bind-address = ::
{% if galera_server_id is defined %}
server-id = {{ galera_server_id }}
{% endif %}
{% if galera_use_ssl | bool %}
ssl-ca = {{ galera_ssl_ca_cert }}
ssl-cert = {{ galera_ssl_cert }}
ssl-key = {{ galera_ssl_key }}
{% endif %}

# LOGGING #
log-queries-not-using-indexes = {{ galera_unindexed_query_logging }}
slow-query-log = {{ galera_slow_query_logging }}
slow-query-log-file = /var/log/mysql_logs/mysql-slow.log
log_error = /var/log/mysql_logs/galera_server_error.log
log-bin = /var/lib/mysql/mariadb-bin
log-bin-index = /var/lib/mysql/mariadb-bin.index
expire-logs-days = 7
log_slave_updates = 1
log_bin_trust_function_creators = 1

# SAFETY #
max-allowed-packet = 16M
max-connect-errors = 1000000

# NOTE: If galera_max_connections is not configured by user, the number of max
# connections is defined by ( host_vcpus * 100 ) with a capping value of 1600.
# This value is the lowest integer based on the ansible facts gathered from
# every galera node.
# Computing the connections value using the lowest denominator maintains
# cluster integrity by not attempting to over commit to a less capable machine.
# These are the computed max_connections based on the cluster data
# {{ calculated_max_connections }}
max_connections = {{ galera_max_connections | default(calculated_max_connections[0]) }}

wait_timeout = {{ galera_wait_timeout }}

# CACHES AND LIMITS #
tmp-table-size = {{ galera_max_heap_table_size }}
max-heap-table-size = {{ galera_tmp_table_size }}
query-cache-type = 0
query-cache-size = 0M
thread-cache-size = 50
open-files-limit = {{ galera_file_limits }}
table-definition-cache = 4096
table-open-cache = 10240

# INNODB #
innodb-flush-method = O_DIRECT
innodb-log-file-size = {{ galera_innodb_log_file_size }}
innodb-flush-log-at-trx-commit = 1
innodb-file-per-table = 1
innodb-buffer-pool-size = {{ galera_innodb_buffer_pool_size }}

# Depending on number of cores and disk sub
innodb-read-io-threads = 4
innodb-write-io-threads = 4
innodb-doublewrite = 1
innodb-log-buffer-size = {{ galera_innodb_log_buffer_size }}
innodb-buffer-pool-instances = 8
innodb-log-files-in-group = 2
innodb-thread-concurrency = 64

# avoid statistics update when doing e.g show tables
innodb_stats_on_metadata = 0

[mysqldump]
quick
quote-names
max_allowed_packet = 16M


!includedir /etc/mysql/conf.d/