Mariadb 集群 Galera Cluster 基于多主架构
文章目录
- 一、下载安装 Galera Cluster
- 二、集群搭建
- Master1
- Master2
- Master3
一、下载安装 Galera Cluster
Mariadb10.2.25与Mariadb 5.5安装 galera cluster 区别：
Mariadb 10.1版本以后，Galera Cluster 与Mariadb-server包在一起，此版本之前需求单独安装MariaDB-Galera-server 包
官方说明详见：https://mariadb.com/kb/en/library/yum/#importing-the-mariadb-gpg-public-key
yum 安装mariadb 10.2.25 自带安装 galera-25.3.26-1.rhel7.el7.centos.x86_64.rpm
===========================================================================================================================
Package Arch Version Repository Size
===========================================================================================================================
Installing:
MariaDB-compat x86_64 10.2.25-1.el7.centos mariadb 2.8 M
replacing mariadb-libs.x86_64 1:5.5.60-1.el7_5
MariaDB-server x86_64 10.2.25-1.el7.centos mariadb 24 M
Installing for dependencies:
MariaDB-client x86_64 10.2.25-1.el7.centos mariadb 11 M
MariaDB-common x86_64 10.2.25-1.el7.centos mariadb 78 k
boost-program-options x86_64 1.53.0-27.el7 base 156 k
galera x86_64 25.3.26-1.rhel7.el7.centos mariadb 8.1 M
perl-Compress-Raw-Bzip2 x86_64 2.061-3.el7 base 32 k
perl-Compress-Raw-Zlib x86_64 1:2.061-4.el7 base 57 k
perl-DBI x86_64 1.627-4.el7 base 802 k
perl-Data-Dumper x86_64 2.145-3.el7 base 47 k
perl-IO-Compress noarch 2.061-2.el7 base 260 k
perl-Net-Daemon noarch 0.48-5.el7 base 51 k
perl-PlRPC noarch 0.2020-14.el7 base 36 k
Transaction Summary
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libgalera_smm.so模块路径：/usr/lib64/galera/libgalera_smm.so
二、集群搭建
环境：
- 三台主机Centos 7
- Mariadb版本：10.2.25
- 数据库安装源：
[mariadb]
name=mariadb
baseurl=https://mirrors.tuna.tsinghua.edu.cn/mariadb/yum/10.2/centos7-amd64/
gpgcheck=0
- galera 版本 ：galera-25.3.26
具体配置如下：
Master1
1.配置集群功能 server.cnf
[root@CentOS7 ~]#vim /etc/my.cnf.d/server.cnf
[galera]
wsrep_on=ON
wsrep_provider=/usr/lib64/galera/libgalera_smm.so
wsrep_cluster_address=gcomm://192.168.37.100,192.168.37.102,192.168.37.103
binlog_format=row
2.拷贝server.cnf 配置文件到其他节点主机
[root@CentOS7 ~]#scp /etc/my.cnf.d/server.cnf 192.168.37.102:/etc/my.cnf.d/
[root@CentOS7 ~]#scp /etc/my.cnf.d/server.cnf 192.168.37.102:/etc/my.cnf.d/
3.启动第一个节点
#启动方式与其他节点启动方式不同
#脚本位置:/bin/galera_new_cluster
[root@CentOS7 ~]#/galera_new_cluster
4.查看集群状态
集群中相关系统变量和状态变量官方说明如下：
https://galeracluster.com/library/documentation/mysql-wsrep-options.html#wsrep-cluster-address
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 | 3 |
| wsrep_cluster_size | 3 #集群节点数 |
| wsrep_cluster_state_uuid | f28cf819-a895-11e9-87ab-ba77915f46d6 |
| wsrep_cluster_status | Primary #集群节点角色 |
| wsrep_cluster_weight | 3 |
| wsrep_commit_oooe | 0.000000 |
| wsrep_commit_oool | 0.000000 |
| wsrep_commit_window | 0.000000 |
| wsrep_connected | ON #wsrep连接状态 |
| 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 | f28b8e86-a895-11e9-983e-82b82b368128 |
| wsrep_incoming_addresses | 192.168.37.100:3306,192.168.37.102:3306,192.168.37.103:3306 |
| 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 | 0.100000 |
| 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 | f28cf819-a895-11e9-87ab-ba77915f46d6 |
| 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 | 25.3.26(r3857) |
| wsrep_ready | ON |
| wsrep_received | 10 |
| wsrep_received_bytes | 854 |
| 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 |
+------------------------------+-------------------------------------------------------------+
Master2
1.启动数据库服务
#启动过程较慢，因为集群的节点在通讯
[root@CentOS7 ~]#systemctl restart mariadb
Master3
1.启动数据库服务
#启动过程较慢，因为集群的节点在通讯
[root@CentOS7 ~]#systemctl restart mariadb