MariaDB Galera Cluster

MariaDB Galera Cluster 2015/07/26

	Configure MariaDB Galera Cluster. All nodes in cluster become Master-Server in this configuration.
[1]	Install MariaDB Galera packages on all nodes like follows.

[root@www ~]#  vi /etc/yum.repos.d/mariadb.repo # MariaDB 10.0 CentOS repository list # http://mariadb.org/mariadb/repositories/ [mariadb] name = MariaDB baseurl = http://yum.mariadb.org/10.0/centos7-amd64 gpgkey=https://yum.mariadb.org/RPM-GPG-KEY-MariaDB gpgcheck=1 enabled=0 [root@www ~]#  yum --enablerepo=mariadb -y install MariaDB-Galera-server

[2]	Configure a 1st node like follows.

[root@www ~]#  vi /etc/my.cnf.d/server.cnf # line 19: uncomment and change like follows [galera] # Mandatory settings wsrep_provider= /usr/lib64/galera/libgalera_smm.so  # specify all nodes in cluster wsrep_cluster_address= "gcomm://10.0.0.31,10.0.0.51" # uncomment all binlog_format=row default_storage_engine=InnoDB innodb_autoinc_lock_mode=2 bind-address=0.0.0.0 # add follows # cluster name wsrep_cluster_name="MariaDB_Cluster" # own IP address wsrep_node_address="10.0.0.31" # replication provider wsrep_sst_method=rsync [root@www ~]#  /etc/rc.d/init.d/mysql bootstrap  Bootstrapping the cluster.. Starting MySQL.. SUCCESS! # configure basic settings [root@www ~]#  mysql_secure_installation

[3]	Configure other nodes except a node of previous section like follows.

[root@node01 ~]#  vi /etc/my.cnf.d/server.cnf # line 19: uncomment and change like follows [galera] # Mandatory settings wsrep_provider= /usr/lib64/galera/libgalera_smm.so  # specify all nodes in cluster wsrep_cluster_address= "gcomm://10.0.0.31,10.0.0.51" # uncomment all binlog_format=row default_storage_engine=InnoDB innodb_autoinc_lock_mode=2 bind-address=0.0.0.0 # add follows # cluster name wsrep_cluster_name="MariaDB_Cluster" # own IP address wsrep_node_address="10.0.0.51" # replication provider wsrep_sst_method=rsync [root@node01 ~]#  systemctl start mysql

[4]	The Cluster settings is OK, Make sute the status like follows. It's OK if "wsrep_local_state_comment" is "Synced".

[root@node01 ~]#  mysql -u root -p  Enter password: Welcome to the MariaDB monitor. Commands end with ; or \g. Your MariaDB connection id is 6 Server version: 10.0.20-MariaDB-wsrep MariaDB Server, wsrep_25.10.r4144 Copyright (c) 2000, 2015, Oracle, MariaDB Corporation Ab and others. Type 'help;' or '\h' for help. Type '\c' to clear the current input statement. MariaDB [(none)]>  show status like 'wsrep_%';  +------------------------------+--------------------------------------+ | Variable_name | Value | +------------------------------+--------------------------------------+ | wsrep_local_state_uuid | 20329169-3414-11e5-9285-cab5ed757f81 | | wsrep_protocol_version | 7 | | wsrep_last_committed | 3 | | wsrep_replicated | 0 | | wsrep_replicated_bytes | 0 | | wsrep_repl_keys | 0 | | wsrep_repl_keys_bytes | 0 | | wsrep_repl_data_bytes | 0 | | wsrep_repl_other_bytes | 0 | | wsrep_received | 3 | | wsrep_received_bytes | 237 | | wsrep_local_commits | 0 | | wsrep_local_cert_failures | 0 | | wsrep_local_replays | 0 | | wsrep_local_send_queue | 0 | | wsrep_local_send_queue_max | 2 | | wsrep_local_send_queue_min | 0 | | wsrep_local_send_queue_avg | 0.333333 | | wsrep_local_recv_queue | 0 | | wsrep_local_recv_queue_max | 1 | | wsrep_local_recv_queue_min | 0 | | wsrep_local_recv_queue_avg | 0.000000 | | wsrep_local_cached_downto | 18446744073709551615 | | wsrep_flow_control_paused_ns | 0 | | wsrep_flow_control_paused | 0.000000 | | wsrep_flow_control_sent | 0 | | wsrep_flow_control_recv | 0 | | wsrep_cert_deps_distance | 0.000000 | | wsrep_apply_oooe | 0.000000 | | wsrep_apply_oool | 0.000000 | | wsrep_apply_window | 0.000000 | | wsrep_commit_oooe | 0.000000 | | wsrep_commit_oool | 0.000000 | | wsrep_commit_window | 0.000000 | | wsrep_local_state | 4 | | wsrep_local_state_comment | Synced | | wsrep_cert_index_size | 0 | | wsrep_causal_reads | 0 | | wsrep_cert_interval | 0.000000 | | wsrep_incoming_addresses | 10.0.0.31:3306,10.0.0.51:3306 | | wsrep_evs_delayed | | | wsrep_evs_evict_list | | | wsrep_evs_repl_latency | 0/0/0/0/0 | | wsrep_evs_state | OPERATIONAL | | wsrep_gcomm_uuid | 69d7b95d-3415-11e5-9666-7be9d4b6159d | | wsrep_cluster_conf_id | 2 | | wsrep_cluster_size | 2 | | wsrep_cluster_state_uuid | 20329169-3414-11e5-9285-cab5ed757f81 | | wsrep_cluster_status | Primary | | wsrep_connected | ON | | wsrep_local_bf_aborts | 0 | | wsrep_local_index | 1 | | wsrep_provider_name | Galera | | wsrep_provider_vendor | Codership Oy <info@codership.com> | | wsrep_provider_version | 25.3.9(r3387) | | wsrep_ready | ON | | wsrep_thread_count | 2 | +------------------------------+--------------------------------------+ 57 rows in set (0.00 sec)