MariaDB : Galera Cluster2020/05/09 |
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Configure MariaDB Galera Cluster.
All nodes in cluster become Master-Server in this configuration. |
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| [1] | |
| [2] | Configure a 1st node like follows. |
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root@www:~#
vi /etc/mysql/mariadb.conf.d/50-server.cnf # line 28: comment out # bind-address = 127.0.0.1
# add to the end [galera] wsrep_on=ON wsrep_provider=/usr/lib/galera/libgalera_smm.so wsrep_cluster_address=gcomm:// binlog_format=row default_storage_engine=InnoDB innodb_autoinc_lock_mode=2 bind-address=0.0.0.0 # any cluster name wsrep_cluster_name="MariaDB_Cluster" # own IP address wsrep_node_address="10.0.0.31"
root@www:~#
vi /usr/bin/galera_recovery # line 104: comment out (for bug fix) if [ -n "$log_file" -a -f "$log_file" ]; then # [ "$euid" = "0" ] && chown $user $log_file
galera_new_cluster root@www:~# systemctl restart mariadb |
| [3] | Configure other nodes except a 1st node. |
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root@node01:~#
vi /etc/mysql/mariadb.conf.d/50-server.cnf # line 28: comment out # bind-address = 127.0.0.1
# add to the end [galera] wsrep_on=ON wsrep_provider=/usr/lib/galera/libgalera_smm.so # specify all nodes in cluster wsrep_cluster_address="gcomm://10.0.0.31,10.0.0.51" binlog_format=row default_storage_engine=InnoDB innodb_autoinc_lock_mode=2 bind-address=0.0.0.0 # any cluster name wsrep_cluster_name="MariaDB_Cluster" # own IP address wsrep_node_address="10.0.0.51"
root@node01:~#
vi /usr/bin/galera_recovery # line 104: comment out (for bug) if [ -n "$log_file" -a -f "$log_file" ]; then # [ "$euid" = "0" ] && chown $user $log_file
systemctl restart mariadb |
| [4] | That's OK. Make sute the status like follows. It's OK if [wsrep_local_state_comment] is [Synced]. |
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root@node01:~# mysql
Welcome to the MariaDB monitor. Commands end with ; or \g.
Your MariaDB connection id is 38
Server version: 10.3.22-MariaDB-1ubuntu1 Ubuntu 20.04
Copyright (c) 2000, 2018, 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_applier_thread_count | 1 |
| 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 | f6026c91-91df-11ea-8d69-caf006b3e848 |
| wsrep_cluster_status | Primary |
| wsrep_cluster_weight | 2 |
| 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 | 0.000267615/0.000402032/0.000660328/0.000126593/7 |
| 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 | 8ded5a4b-91e0-11ea-8d07-8f0d6519739a |
| wsrep_incoming_addresses | 10.0.0.51:3306,10.0.0.31:3306 |
| wsrep_last_committed | 0 |
| wsrep_local_bf_aborts | 0 |
| wsrep_local_cached_downto | 18446744073709551615 |
| wsrep_local_cert_failures | 0 |
| wsrep_local_commits | 0 |
| wsrep_local_index | 0 |
| wsrep_local_recv_queue | 0 |
| wsrep_local_recv_queue_avg | 0.333333 |
| wsrep_local_recv_queue_max | 2 |
| wsrep_local_recv_queue_min | 0 |
| wsrep_local_replays | 0 |
| wsrep_local_send_queue | 0 |
| wsrep_local_send_queue_avg | 0.000000 |
| wsrep_local_send_queue_max | 1 |
| wsrep_local_send_queue_min | 0 |
| wsrep_local_state | 4 |
| wsrep_local_state_comment | Synced |
| wsrep_local_state_uuid | f6026c91-91df-11ea-8d69-caf006b3e848 |
| wsrep_open_connections | 0 |
| wsrep_open_transactions | 0 |
| wsrep_protocol_version | 9 |
| wsrep_provider_name | Galera |
| wsrep_provider_vendor | Codership Oy >info@codership.com> |
| wsrep_provider_version | 3.29(ra60e019) |
| 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_rollbacker_thread_count | 1 |
| wsrep_thread_count | 2 |
+-------------------------------+---------------------------------------------------+
63 rows in set (0.002 sec)
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