Add configuration options for my.cnf

The following configuration options added:

    galera_innodb_read_io_threads: 8
    galera_innodb_write_io_threads: 8
    galera_wsrep_slave_threads: 8
    galera_xtrabackup_parallel: 4
    galera_error_log_enabled: false

Change-Id: Id1185c3a38669c37dc88806b4e9955522629ce1c
Related-Bug: https://mirantis.jira.com/browse/PROD-16528

README.rst

 
 - **galera_innodb_buffer_pool_size** - the default value is 3138M
 - **galera_max_connections** - the default value is 20000
+- **galera_innodb_read_io_threads** - the default value is 8
+- **galera_innodb_write_io_threads** - the default value is 8
+- **galera_wsrep_slave_threads** - the default value is 8
+- **galera_xtrabackup_parallel** - the default value is 4
+- **galera_error_log_enabled** - the default value is 'false'
 
 Usage:
 .. code-block:: yaml
     _param:
       galera_innodb_buffer_pool_size: 1024M
       galera_max_connections: 200
+      galera_innodb_read_io_threads: 16
+      galera_innodb_write_io_threads: 16
+      galera_wsrep_slave_threads: 8
+      galera_xtrabackup_parallel: 2
+      galera_error_log_enabled: true
 
 
 Usage

galera/files/my.cnf

 init-connect='SET NAMES utf8'
 character-set-server=utf8
 default-storage-engine=innodb
-#log_error=/var/log/mysql/error.log
+{%- if service.get('error_log_enabled', False) %}
+log_error = /var/log/mysql/error.log
+{%- else %}
+#log_error = /var/log/mysql/error.log
+{%- endif %}
 skip-external-locking
 skip-name-resolve
 socket = /var/run/mysqld/mysqld.sock
 innodb_file_per_table=1
 innodb_buffer_pool_size={{ service.innodb_buffer_pool_size }}
 innodb_log_file_size=627M
-innodb_read_io_threads=8
-innodb_write_io_threads=8
+innodb_read_io_threads={{ service.get('innodb_read_io_threads', 8) }}
+innodb_write_io_threads={{ service.get('innodb_write_io_threads', 8) }}
 innodb_io_capacity=500
 innodb_flush_log_at_trx_commit=2
 innodb_flush_method=O_DIRECT
 wsrep_provider={{ service.wsrep_provider }}
 wsrep_cluster_name="openstack"
 
-wsrep_slave_threads=8
+wsrep_slave_threads={{ service.get('wsrep_slave_threads', 8) }}
 wsrep_sst_method=xtrabackup-v2
 wsrep_sst_auth={{ service.admin.user }}:{{ service.admin.password }}
 wsrep_node_address={{ service.bind.address }}
 {% endif %}
 
 [xtrabackup]
-parallel=4
+parallel={{ service.get('xtrabackup_parallel', 4) }}
 
 [sst]
 streamfmt=xbstream

galera/files/my.cnf.container

 innodb_flush_log_at_trx_commit=2
 innodb_file_per_table=1
 innodb_data_file_path = ibdata1:100M:autoextend
-innodb_read_io_threads=8
-innodb_write_io_threads=8
+innodb_read_io_threads={{ service.get('innodb_read_io_threads', 8) }}
+innodb_write_io_threads={{ service.get('innodb_write_io_threads', 8) }}
 innodb_io_capacity=500
 innodb_doublewrite=0
 innodb_log_file_size=627M
 wsrep_provider_options="gcache.size=512M; gmcast.segment=0"
 wsrep_cluster_name="my_wsrep_cluster"
 wsrep_cluster_address="gcomm://{% for member in service.members %}{{ member.host}}{% if not loop.last %},{% endif %}{% endfor %}"
-wsrep_slave_threads=8
+wsrep_slave_threads={{ service.get('wsrep_slave_threads', 8) }}
 wsrep_certify_nonPK=1
 wsrep_max_ws_rows=131072
 wsrep_max_ws_size=1073741824
 socket=/var/lib/mysql/mysql.sock
 
 [xtrabackup]
-parallel=4
+parallel={{ service.get('xtrabackup_parallel', 4) }}
 user={{ service.admin.user }}
 password={{ service.admin.password }}

galera/files/my.cnf.init

 query_cache_size=0
 query_cache_type=0
 
+{%- if service.get('error_log_enabled', False) %}
+log_error = /var/log/mysql/error.log
+{%- else %}
+#log_error = /var/log/mysql/error.log
+{%- endif %}
+
 innodb_file_format=Barracuda
 innodb_file_per_table=1
 innodb_buffer_pool_size={{ service.innodb_buffer_pool_size }}
 innodb_log_file_size=627M
-innodb_read_io_threads=8
-innodb_write_io_threads=8
+innodb_read_io_threads={{ service.get('innodb_read_io_threads', 8) }}
+innodb_write_io_threads={{ service.get('innodb_write_io_threads', 8) }}
 innodb_io_capacity=500
 innodb_flush_log_at_trx_commit=2
 innodb_flush_method=O_DIRECT
 wsrep_provider={{ service.wsrep_provider }}
 wsrep_cluster_name="openstack"
 
-wsrep_slave_threads=8
+wsrep_slave_threads={{ service.get('wsrep_slave_threads', 8) }}
 wsrep_sst_method=xtrabackup-v2
 wsrep_sst_auth={{ service.admin.user }}:{{ service.admin.password }}
 wsrep_node_address={{ service.bind.address }}
 {% endif %}
 
 [xtrabackup]
-parallel=4
+parallel={{ service.get('xtrabackup_parallel', 4) }}
 
 [sst]
 streamfmt=xbstream

galera/files/my.cnf.pre

 myisam-recover         = BACKUP
 query_cache_limit	= 1M
 query_cache_size        = 16M
-#log_error = /var/log/mysql/error.log
+log_error = /var/log/mysql/error.log
 expire_logs_days	= 10
 max_binlog_size         = 100M
 [mysqldump]

metadata/service/master/cluster.yml

     galera_server_admin_user: root
     galera_max_connections: 20000
     galera_innodb_buffer_pool_size: 3138M
+    galera_innodb_read_io_threads: 8
+    galera_innodb_write_io_threads: 8
+    galera_wsrep_slave_threads: 8
+    galera_xtrabackup_parallel: 4
+    galera_error_log_enabled: false
   galera:
     master:
       enabled: true
         port: 4567
       max_connections: ${_param:galera_max_connections}
       innodb_buffer_pool_size: ${_param:galera_innodb_buffer_pool_size}
+      innodb_read_io_threads: ${_param:galera_innodb_read_io_threads}
+      innodb_write_io_threads: ${_param:galera_innodb_write_io_threads}
+      wsrep_slave_threads: ${_param:galera_wsrep_slave_threads}
+      xtrabackup_parallel: ${_param:galera_xtrabackup_parallel}
+      error_log_enabled: ${_param:galera_error_log_enabled}
   mysql:
     server:
       users:

metadata/service/master/container.yml

     galera_server_admin_user: root
     galera_max_connections: 20000
     galera_innodb_buffer_pool_size: 3138M
+    galera_innodb_read_io_threads: 8
+    galera_innodb_write_io_threads: 8
+    galera_wsrep_slave_threads: 8
+    galera_xtrabackup_parallel: 4
+    galera_error_log_enabled: false
   kubernetes:
     control:
       configmap:
                   port: 4567
                 max_connections: ${_param:galera_max_connections}
                 innodb_buffer_pool_size: ${_param:galera_innodb_buffer_pool_size}
+                innodb_read_io_threads: ${_param:galera_innodb_read_io_threads}
+                innodb_write_io_threads: ${_param:galera_innodb_write_io_threads}
+                wsrep_slave_threads: ${_param:galera_wsrep_slave_threads}
+                xtrabackup_parallel: ${_param:galera_xtrabackup_parallel}
+                error_log_enabled: ${_param:galera_error_log_enabled}
             mysql:
               server:
                 users:

metadata/service/slave/cluster.yml

     galera_server_admin_user: root
     galera_max_connections: 20000
     galera_innodb_buffer_pool_size: 3138M
+    galera_innodb_read_io_threads: 8
+    galera_innodb_write_io_threads: 8
+    galera_wsrep_slave_threads: 8
+    galera_xtrabackup_parallel: 4
+    galera_error_log_enabled: false
   galera:
     slave:
       enabled: true
         port: 4567
       max_connections: ${_param:galera_max_connections}
       innodb_buffer_pool_size: ${_param:galera_innodb_buffer_pool_size}
+      innodb_read_io_threads: ${_param:galera_innodb_read_io_threads}
+      innodb_write_io_threads: ${_param:galera_innodb_write_io_threads}
+      wsrep_slave_threads: ${_param:galera_wsrep_slave_threads}
+      xtrabackup_parallel: ${_param:galera_xtrabackup_parallel}
+      error_log_enabled: ${_param:galera_error_log_enabled}
   mysql:
     server:
       users: