centos7 系统上 mariadb galera 集群搭建

1.环境

CentOS Linux release 7.3
MariaDB 10.1.25

2.安装MariaDB

配置mariadb10.1的yum源
[root@centos7-compute1 ~]# cat /etc/yum.repos.d/MariaDB.repo
[root@centos7-compute2 ~]# cat /etc/yum.repos.d/MariaDB.repo
[root@centos7-compute3 ~]# cat /etc/yum.repos.d/MariaDB.repo
MariaDB.repo:
[mariadb]
name = MariaDB
baseurl = http://yum.mariadb.org/10.1/centos7-amd64
gpgkey=https://yum.mariadb.org/RPM-GPG-KEY-MariaDB
gpgcheck=1

3.使用yum安装

[root@centos7-compute1 ~]# sudo yum install MariaDB-server MariaDB-client galera
[root@centos7-compute2 ~]# sudo yum install MariaDB-server MariaDB-client galera
[root@centos7-compute3 ~]# sudo yum install MariaDB-server MariaDB-client galera

4.安全配置

[root@centos7-compute1 ~]# /usr/bin/mysql_secure_installation
[root@centos7-compute2 ~]# /usr/bin/mysql_secure_installation
[root@centos7-compute3 ~]# /usr/bin/mysql_secure_installation
compute1,compute2,compute3 三节点 启动MariaDB并赋权:
grant all privileges on *.* to root@"%" identified by "123456";
flush privileges;
然后全部节点关闭数据库
[root@centos7-compute1 ~]# systemctl stop mariadb
[root@centos7-compute2 ~]# systemctl stop mariadb
[root@centos7-compute3 ~]# systemctl stop mariadb
注意:此时需要全部节点关闭selinx,防火墙。防止接下来的影响集群通讯
 systemctl stop firewalld
systemctl disable firewalld

5.配置MariaDB Galera Cluster

修改三台节点上的/etc/my.cnf.d/server.cnf 文件
compute1 配置如下:
[mysqld]

[galera]
wsrep_provider = /usr/lib64/galera/libgalera_smm.so
wsrep_cluster_name='my_wsrep_cluster'
wsrep_cluster_address = "gcomm://192.168.140.197,192.168.140.141,192.168.140.192"
wsrep_node_name = centos7-compute1
wsrep_node_address=192.168.140.197
wsrep_on=ON
binlog_format=ROW
default_storage_engine=InnoDB
innodb_autoinc_lock_mode=2
wsrep_slave_threads=1
innodb_flush_log_at_trx_commit=2
innodb_buffer_pool_size=1024M
wsrep_sst_method=rsync
wsrep_sst_auth=root:123456

[embedded]

[mariadb]

[mariadb-10.1]

compute2 配置如下:

[mysqld]

[galera]
wsrep_provider = /usr/lib64/galera/libgalera_smm.so
wsrep_cluster_name='my_wsrep_cluster'
wsrep_cluster_address = "gcomm://192.168.140.197,192.168.140.141,192.168.140.192"
wsrep_node_name = centos7-compute2
wsrep_node_address=192.168.140.141
wsrep_on=ON
binlog_format=ROW
default_storage_engine=InnoDB
innodb_autoinc_lock_mode=2
wsrep_slave_threads=1
innodb_flush_log_at_trx_commit=2
innodb_buffer_pool_size=1024M
wsrep_sst_method=rsync
wsrep_sst_auth=root:123456

[embedded]

[mariadb]

[mariadb-10.1]

compute3 配置如下:
[mysqld]

[galera]
wsrep_provider = /usr/lib64/galera/libgalera_smm.so
wsrep_cluster_name='my_wsrep_cluster'
wsrep_cluster_address = "gcomm://192.168.140.197,192.168.140.141,192.168.140.192"
wsrep_node_name = centos7-compute3
wsrep_node_address=192.168.140.192
wsrep_on=ON
binlog_format=ROW
default_storage_engine=InnoDB
innodb_autoinc_lock_mode=2
wsrep_slave_threads=1
innodb_flush_log_at_trx_commit=2
innodb_buffer_pool_size=1024M
wsrep_sst_method=rsync
wsrep_sst_auth=root:123456

[embedded]

[mariadb]

[mariadb-10.1]

6.启动集群

引导集群创建
只在compute1操作:
[root@centos7-compute1 ~]# /usr/sbin/mysqld --wsrep-new-cluster --user=root &

查看集群状态

MariaDB [(none)]> show  status like "wsrep_cluster_size";
+--------------------+-------------+
| Variable_name      | Value |
+--------------------+-------------+
| wsrep_cluster_size | 1     |
+--------------------+-------------+


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        | 1                                              |
| wsrep_cluster_size           | 1                                              |
| wsrep_cluster_state_uuid     | 1e434901-71b5-11e7-b190-7bb2f4bbed7a           |
| 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       | 5.592e-06/1.25208e-05/2.5685e-05/8.62896e-06/5 |
| 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             | 35623b8e-71ad-11e7-af9f-52f25b42ebcf           |
| wsrep_incoming_addresses     | 192.168.140.197:3306                           |
| 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   | 0.500000                                       |
| 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       | 1e434901-71b5-11e7-b190-7bb2f4bbed7a           |
| wsrep_protocol_version       | 7                                              |
| wsrep_provider_name          | Galera                                         |
| wsrep_provider_vendor        | Codership Oy               |
| wsrep_provider_version       | 25.3.20(r3703)                                 |
| wsrep_ready                  | ON                                             |
| wsrep_received               | 2                                              |
| wsrep_received_bytes         | 155                                            |
| 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                                              |
+------------------------------+------------------------------------------------+

向集群中添加其他节点:

[root@centos7-compute2 ~]# systemctl start mariadb
[root@centos7-compute3 ~]# systemctl start mariadb

查看集群状态:

MariaDB [(none)]> show status like "wsrep_cluster_size";
+--------------------+-------+
| Variable_name      | Value |
+--------------------+-------+
| wsrep_cluster_size | 3     |
+--------------------+-------+
1 row in set (0.00 sec)

7.测试数据同步

在 compute1上创建数据库,表并插入数据,观察compute2,compute3 数据情况
MariaDB [(none)]> create database galera;
MariaDB [galera]> create table t (id int primary key);
insert into t value(1);
insert into t value(2);
insert into t value(3);

查看compute2,compute3数据库

MariaDB [galera]> show tables;
+------------------+
| Tables_in_galera |
+------------------+
| t                |
+------------------+
1 row in set (0.00 sec)
MariaDB [galera]> select * from t;
+----+
| id |
+----+
|  1 |
|  2 |
|  3 |
+----+

经过测试,删除数据库,增删查改表都可以实时同步。


8.故障测试

[root@centos7-compute3 ~]# systemctl stop mariadb
然后在compute1,compute2 分别插入数据时,等待compute3启动后自己会同步

并且此时集群节点为两个。

MariaDB [galera]> SHOW STATUS LIKE 'wsrep_cluster_size';
+--------------------+-------+
| Variable_name      | Value |
+--------------------+-------+
| wsrep_cluster_size | 2     |
+--------------------+-------+



参考文档:http://galeracluster.com/documentation-webpages/galerainstallation.html

mariadb repo :https://downloads.mariadb.org/mariadb/repositories/#mirror=neusoft&distro=CentOS&distro_release=centos7-amd64--centos7&version=10.1

 
 

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