|
MariaDB 10.2 : MariaDB Galera Cluster
2017/10/30 |
|
Configure MariaDB Galera Cluster.
All nodes in cluster become Master-Server in this configuration. |
|
| [1] | Install MariaDB Galera packages on all nodes like follows. |
|
# install from SCLo
[root@www ~]#
yum --enablerepo=centos-sclo-rh -y install rh-mariadb102-mariadb-server-galera # if Firewalld is running, set like follows [root@www ~]# firewall-cmd --add-service=mysql --permanent [root@www ~]# firewall-cmd --add-port={3306/tcp,4567/tcp,4568/tcp,4444/tcp} --permanent [root@www ~]# firewall-cmd --reload |
| [2] | Configure a 1st node like follows. |
|
[root@www ~]# mv /etc/opt/rh/rh-mariadb102/my.cnf.d/galera.cnf /etc/opt/rh/rh-mariadb102/my.cnf.d/galera.cnf.org
[root@www ~]#
vi /etc/opt/rh/rh-mariadb102/my.cnf.d/mariadb-server.cnf # line 30: uncomment and change like follows [galera] # Mandatory settings wsrep_on=ON wsrep_provider= /opt/rh/rh-mariadb102/root/usr/lib64/galera/libgalera_smm.so wsrep_cluster_address= gcomm:// # uncomment like follows 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 # start Galera Cluster [root@www ~]# /opt/rh/rh-mariadb102/root/usr/bin/galera_new_cluster
# run basic initial settings [root@www ~]# mysql_secure_installation |
| [3] | Configure other nodes except a node of previous section like follows. |
|
[root@node01 ~]# mv /etc/opt/rh/rh-mariadb102/my.cnf.d/galera.cnf /etc/opt/rh/rh-mariadb102/my.cnf.d/galera.cnf.org
[root@node01 ~]#
vi /etc/opt/rh/rh-mariadb102/my.cnf.d/mariadb-server.cnf # line 30: uncomment and change like follows [galera] # Mandatory settings wsrep_on=ON wsrep_provider= /opt/rh/rh-mariadb102/root/usr/lib64/galera/libgalera_smm.so # specify all nodes in cluster wsrep_cluster_address= "gcomm://10.0.0.31,10.0.0.51" 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 systemctl start rh-mariadb102-mariadb |
| [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 11 Server version: 10.2.8-MariaDB-log MariaDB Server Copyright (c) 2000, 2017, 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_apply_oooe | 0.000000 | | wsrep_apply_oool | 0.000000 | | wsrep_apply_window | 0.000000 | | wsrep_causal_reads | 0 | | wsrep_cert_deps_distance | 0.000000 | | wsrep_cert_index_size | 0 | | wsrep_cert_interval | 0.000000 | | wsrep_cluster_conf_id | 2 | | wsrep_cluster_size | 2 | | wsrep_cluster_state_uuid | 5f73ca9f-be0e-11e7-b57e-66deb0603196 | | wsrep_cluster_status | Primary | | wsrep_commit_oooe | 0.000000 | | wsrep_commit_oool | 0.000000 | | wsrep_commit_window | 0.000000 | | wsrep_connected | ON | | wsrep_desync_count | 0 | | wsrep_evs_delayed | | | wsrep_evs_evict_list | | | wsrep_evs_repl_latency | 0.000607146/0.00150996/0.00418607/0.00134739/5 | | wsrep_evs_state | OPERATIONAL | | wsrep_flow_control_paused | 0.000000 | | wsrep_flow_control_paused_ns | 0 | | wsrep_flow_control_recv | 0 | | wsrep_flow_control_sent | 0 | | wsrep_gcomm_uuid | e1ceedcc-be0e-11e7-bdc4-6332d9eeeb20 | | wsrep_incoming_addresses | 10.0.0.31:3306,10.0.0.51:3306 | | wsrep_last_committed | 3 | | wsrep_local_bf_aborts | 0 | | wsrep_local_cached_downto | 18446744073709551615 | | wsrep_local_cert_failures | 0 | | wsrep_local_commits | 0 | | wsrep_local_index | 1 | | wsrep_local_recv_queue | 0 | | wsrep_local_recv_queue_avg | 0.000000 | | wsrep_local_recv_queue_max | 1 | | wsrep_local_recv_queue_min | 0 | | wsrep_local_replays | 0 | | wsrep_local_send_queue | 0 | | wsrep_local_send_queue_avg | 0.333333 | | wsrep_local_send_queue_max | 2 | | wsrep_local_send_queue_min | 0 | | wsrep_local_state | 4 | | wsrep_local_state_comment | Synced | | wsrep_local_state_uuid | 5f73ca9f-be0e-11e7-b57e-66deb0603196 | | wsrep_protocol_version | 7 | | wsrep_provider_name | Galera | | wsrep_provider_vendor | Codership Oy <info@codership.com> | | wsrep_provider_version | 3.20(rXXXX) | | wsrep_ready | ON | | wsrep_received | 3 | | wsrep_received_bytes | 231 | | wsrep_repl_data_bytes | 0 | | wsrep_repl_keys | 0 | | wsrep_repl_keys_bytes | 0 | | wsrep_repl_other_bytes | 0 | | wsrep_replicated | 0 | | wsrep_replicated_bytes | 0 | | wsrep_thread_count | 2 | +------------------------------+------------------------------------------------+ 58 rows in set (0.01 sec) |