时间：2021-07-01 10:21:17 帮助过：17人阅读
配置yum源
[mariadb] name = MariaDB baseurl = http://yum.mariadb.org/10.3.5/centos74-amd64 gpgkey=https://yum.mariadb.org/RPM-GPG-KEY-MariaDB gpgcheck=1 enabled=0
第一步：在各个节点下载下面的软件包
[root@ken ~]# yum install -y MariaDB-server MariaDB-client galera -y
第二步: 初始化数据库
只需要在一个节点执行即可192.168.64.4
[root@ken ~]# systemctl restart mariadb [root@ken ~]# mysql_secure_installation NOTE: RUNNING ALL PARTS OF THIS SCRIPT IS RECOMMENDED FOR ALL MariaDB SERVERS IN PRODUCTION USE! PLEASE READ EACH STEP CAREFULLY! In order to log into MariaDB to secure it, we‘ll need the current password for the root user. If you‘ve just installed MariaDB, and you haven‘t set the root password yet, the password will be blank, so you should just press enter here. Enter current password for root (enter for none): OK, successfully used password, moving on... Setting the root password ensures that nobody can log into the MariaDB root user without the proper authorisation. Set root password? [Y/n] y New password: Re-enter new password: Password updated successfully! Reloading privilege tables.. ... Success! By default, a MariaDB installation has an anonymous user, allowing anyone to log into MariaDB without having to have a user account created for them. This is intended only for testing, and to make the installation go a bit smoother. You should remove them before moving into a production environment. Remove anonymous users? [Y/n] y ... Success! Normally, root should only be allowed to connect from ‘localhost‘. This ensures that someone cannot guess at the root password from the network. Disallow root login remotely? [Y/n] n ... skipping. By default, MariaDB comes with a database named ‘test‘ that anyone can access. This is also intended only for testing, and should be removed before moving into a production environment. Remove test database and access to it? [Y/n] n ... skipping. Reloading the privilege tables will ensure that all changes made so far will take effect immediately. Reload privilege tables now? [Y/n] y ... Success! Cleaning up... All done! If you‘ve completed all of the above steps, your MariaDB installation should now be secure. Thanks for using MariaDB!
第三步：关闭数据库，修改/etc/my.cnf.d/server.cnf
在主配置节点配置如下
[root@ken ~]# systemctl stop mariadb [root@ken ~]# vim /etc/my.cnf.d/server.cnf ... [galera] wsrep_on=ON wsrep_provider=/usr/lib64/galera/libgalera_smm.so wsrep_cluster_address="gcomm://192.168.64.4,192.168.64.5,192.168,64.7" #节点IP地址 wsrep_node_name= ken-node1 #主节点主机名 wsrep_node_address=192.168.64.4 #主节点IP binlog_format=row default_storage_engine=InnoDB innodb_autoinc_lock_mode=2 wsrep_slave_threads=1 innodb_flush_log_at_trx_commit=0 innodb_buffer_pool_size=120M wsrep_sst_method=rsync wsrep_causal_reads=ON
第四步：将此文件复制到mariadb-2、mariadb-3，注意要把 wsrep_node_name 和 wsrep_node_address 改成相应节点的 hostname 和 ip。
第五步：启动集群
主节点192.168.64.4启动命令如下：
[root@ken-node1 ~]# galera_new_cluster
各个节点监听的端口
集群服务监听了4567和3306端口(每个节点都监听了4567和3306端口)
[root@ken-node1 ~]# ss -tnl State Recv-Q Send-Q Local Address:Port Peer Address:Port LISTEN 0 128 *:22 *:* LISTEN 0 128 *:4567 *:* LISTEN 0 100 127.0.0.1:25 *:* LISTEN 0 80 :::3306 :::* LISTEN 0 128 :::80 :::* LISTEN 0 128 :::22 :::* LISTEN 0 100 ::1:25 :::*
其他节点启动命令如下：
[root@ken-node2 ~]# systemctl restart mariadb
在主节点执行如下操作
显示ON表示开启
MariaDB [(none)]> show status like "wsrep_ready"; +---------------+-------+ | Variable_name | Value | +---------------+-------+ | wsrep_ready | ON | +---------------+-------+ 1 row in set (0.005 sec)
机器数为3个显示正确
MariaDB [(none)]> show status like "wsrep_cluster_size"; +--------------------+-------+ | Variable_name | Value | +--------------------+-------+ | wsrep_cluster_size | 3 | +--------------------+-------+ 1 row in set (0.003 sec)
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 | 2 | | wsrep_cert_deps_distance | 0.000000 | | wsrep_cert_index_size | 0 | | wsrep_cert_interval | 0.000000 | | wsrep_cluster_conf_id | 14 | | wsrep_cluster_size | 3 | | wsrep_cluster_state_uuid | 541248ce-56d0-11e9-b41b-3a9775d73ca7 | | wsrep_cluster_status | Primary #主服务器 | | wsrep_commit_oooe | 0.000000 | | wsrep_commit_oool | 0.000000 | | wsrep_commit_window | 0.000000 | | wsrep_connected | ON #当前是否连接中 | | wsrep_desync_count | 0 | | wsrep_evs_delayed | | | wsrep_evs_evict_list | | | wsrep_evs_repl_latency | 0/0/0/0/0 | | 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 | 540ee869-56d0-11e9-955e-9b7f30e437a6 | | wsrep_incoming_addresses | 192.168.64.5:3306,192.168.64.4:3306,192.168.64.7:3306 | #连接中的数据库 | 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 | 1 | | wsrep_local_recv_queue | 0 | | wsrep_local_recv_queue_avg | 0.100000 | | 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 | 541248ce-56d0-11e9-b41b-3a9775d73ca7 | | wsrep_protocol_version | 8 | | wsrep_provider_name | Galera | | wsrep_provider_vendor | Codership Oy <info@codership.com> | | wsrep_provider_version | 25.3.23(r3789) | | wsrep_ready | ON | | wsrep_received | 20 | | wsrep_received_bytes | 3651 | | 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 (0.002 sec)
MariaDB [(none)]> show status like "wsrep_incoming_addresses"; +--------------------------+-------------------------------------------------------+ | Variable_name | Value | +--------------------------+-------------------------------------------------------+ | wsrep_incoming_addresses | 192.168.64.5:3306,192.168.64.4:3306,192.168.64.7:3306 | +--------------------------+-------------------------------------------------------+ 1 row in set (0.001 sec)
在各个节点创建数据库，可以发现每个节点都可以同步
我在192.168.64.4创建ken数据库
[root@ken-node1 ~]# mysql -uroot -p Enter password: Welcome to the MariaDB monitor. Commands end with ; or \g. Your MariaDB connection id is 12 Server version: 10.3.5-MariaDB MariaDB Server 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)]> create database ken; Query OK, 1 row affected (0.041 sec) MariaDB [(none)]> show databases; +--------------------+ | Database | +--------------------+ | information_schema | | ken | | ken1 | | mysql | | performance_schema | | test | +--------------------+ 6 rows in set (0.001 sec)
在192.168.64.5节点上查看数据库
[root@ken-node2 ~]# mysql -uroot -p Enter password: Welcome to the MariaDB monitor. Commands end with ; or \g. Your MariaDB connection id is 11 Server version: 10.3.5-MariaDB MariaDB Server 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 databases; +--------------------+ | Database | +--------------------+ | information_schema | | ken | #ken数据库已经同步过来 | mysql | | performance_schema | | test | +--------------------+ 5 rows in set (0.002 sec)
192.168.64.7节点上查看数据库
[root@ken-node3 ~]# mysql -uroot -p Enter password: Welcome to the MariaDB monitor. Commands end with ; or \g. Your MariaDB connection id is 10 Server version: 10.3.5-MariaDB MariaDB Server 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 databases; +--------------------+ | Database | +--------------------+ | information_schema | | ken | #ken数据库已经同步 | | mysql | | performance_schema | | test | +--------------------+ 6 rows in set (0.002 sec)
MariaDB Galera集群部署--技术流ken
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