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MariaDB Galera Cluster
2016/08/08 |
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Configure MariaDB Galera Cluster.
All nodes in cluster become Master-Server in this configuration. |
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| [1] | Install MariaDB Galera packages on all nodes like follows. |
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# install from SCLo
[root@www ~]#
yum --enablerepo=centos-sclo-rh -y install rh-mariadb101-mariadb-server-galera # if IPTables is running, allow ports like follows [root@www ~]# for port in 3306 4444 4567 4568
do iptables -I INPUT 5 -p tcp -m state --state NEW -m tcp --dport $port -j ACCEPT done |
| [2] | Configure a 1st node like follows. |
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[root@www ~]#
vi /etc/opt/rh/rh-mariadb101/my.cnf.d/mariadb-server.cnf # line 26: uncomment and change like follows [galera] # Mandatory settings wsrep_on=ON wsrep_provider= /opt/rh/rh-mariadb101/root/usr/lib64/galera/libgalera_smm.so wsrep_cluster_address= gcomm:// # uncomment and change 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 [root@www ~]# /opt/rh/rh-mariadb101/root/usr/bin/galera_new_cluster
# run initial settings [root@www ~]# mysql_secure_installation |
| [3] | Configure other nodes except a node of previous section like follows. |
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[root@node01 ~]#
vi /etc/opt/rh/rh-mariadb101/my.cnf.d/mariadb-server.cnf # line 19: uncomment and change liek follows [galera] # Mandatory settings wsrep_on=ON wsrep_provider= /opt/rh/rh-mariadb101/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 /etc/rc.d/init.d/rh-mariadb101-mariadb restart |
| [4] | The Cluster settings is OK, Make sute the status like follows. It's OK if "wsrep_local_state_comment" is "Synced". |
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[root@node01 ~]# mysql -u root -p Enter password: Welcome to the MariaDB monitor. Commands end with ; or \g. Your MariaDB connection id is 5 Server version: 10.1.14-MariaDB MariaDB Server Copyright (c) 2000, 2016, 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 | e567b444-5eaf-11e6-aa03-eff07208d628 | | wsrep_cluster_status | Primary | | wsrep_commit_oooe | 0.000000 | | wsrep_commit_oool | 0.000000 | | wsrep_commit_window | 0.000000 | | wsrep_connected | ON | | wsrep_evs_delayed | | | wsrep_evs_evict_list | | | wsrep_evs_repl_latency | 0.000455914/0.000544072/0.000694008/0.000106567/3 | | 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 | 5be0abb7-5eb2-11e6-9e1f-376a9654ac1c | | 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 | 0.500000 | | 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 | e567b444-5eaf-11e6-aa03-eff07208d628 | | wsrep_protocol_version | 7 | | wsrep_provider_name | Galera | | wsrep_provider_vendor | Codership Oy <info@codership.com> | | wsrep_provider_version | 3.12(r9921e73) | | wsrep_ready | ON | | wsrep_received | 2 | | wsrep_received_bytes | 194 | | 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 | +------------------------------+---------------------------------------------------+ 57 rows in set (0.00 sec) |