Mariadb Galera 集群
配置软件源
#vim /etc/yum.repos.d/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
关闭防火墙
systemctl stop firewalld.service
安装软件
yum --nogpgcheck -y install MariaDB-server galera
Mysql配置
#vim /etc/my.cnf.d/server.cnf
[galera]
wsrep_on=ON
user=mysql
binlog_format=ROW
bind-address=10.0.0.11
default_storage_engine=innodb
innodb_autoinc_lock_mode=2
innodb_flush_log_at_trx_commit=0
innodb_buffer_pool_size=122M
wsrep_provider=/usr/lib64/galera/libgalera_smm.so
wsrep_provider_options="pc.recovery=TRUE;gcache.size=300M"
wsrep_cluster_name="my_cluster"
wsrep_cluster_address="gcomm://10.0.0.11,10.0.0.12,10.0.0.13"
wsrep_sst_method=rsync
wsrep_node_name="node1"
wsrep_node_address="10.0.0.11"
注意：bind-address 不可以为127.0.0.1 也不可以为0.0.0.0否则与Haproxy冲突
启动集群
#在第一个节点上mysql_secure_installation进行用户配置，后续会自动同步
#First node
mysqld --wsrep-new-cluster >/dev/null 2>&1 &
#或者
service mysql start --wsrep-new-cluster
#Not Firest node
systemctl start mariadb
集群状态查询
MariaDB [(none)]> show status like 'wsrep_%';
+------------------------------+----------------------------------------------+
| Variable_name | Value |
+------------------------------+----------------------------------------------+
| wsrep_apply_oooe | 0.000000 |
| wsrep_apply_oool | 0.000000 |
| wsrep_apply_window | 1.000000 |
| wsrep_causal_reads | 0 |
| wsrep_cert_deps_distance | 1.000000 |
| wsrep_cert_index_size | 2 |
| wsrep_cert_interval | 0.000000 |
| wsrep_cluster_conf_id | 3 |
| wsrep_cluster_size | 3 |
| wsrep_cluster_state_uuid | 847994b1-684e-11e6-8cdd-f7899dd9dd58 |
| wsrep_cluster_status | Primary |
| wsrep_commit_oooe | 0.000000 |
| wsrep_commit_oool | 0.000000 |
| wsrep_commit_window | 1.000000 |
| wsrep_connected | ON |
| 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 | 84789f47-684e-11e6-a605-7be2012f0874 |
| wsrep_incoming_addresses | 10.0.0.11:3306,10.0.0.12:3306,10.0.0.13:3306 |
| wsrep_last_committed | 9 |
| wsrep_local_bf_aborts | 0 |
| wsrep_local_cached_downto | 1 |
| wsrep_local_cert_failures | 0 |
| wsrep_local_commits | 0 |
| wsrep_local_index | 0 |
| wsrep_local_recv_queue | 0 |
| wsrep_local_recv_queue_avg | 0.083333 |
| 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 | 847994b1-684e-11e6-8cdd-f7899dd9dd58 |
| wsrep_protocol_version | 7 |
| wsrep_provider_name | Galera |
| wsrep_provider_vendor | Codership Oy <info@codership.com> |
| wsrep_provider_version | 25.3.15(r3578) |
| wsrep_ready | ON |
| wsrep_received | 12 |
| wsrep_received_bytes | 1606 |
| wsrep_repl_data_bytes | 2552 |
| wsrep_repl_keys | 7 |
| wsrep_repl_keys_bytes | 217 |
| wsrep_repl_other_bytes | 0 |
| wsrep_replicated | 7 |
| wsrep_replicated_bytes | 3217 |
| wsrep_thread_count | 2 |
+------------------------------+----------------------------------------------+
与Haproxy配置进行负载均衡
#Haproxy 配置
listen galera_cluster
bind 10.0.0.100:3306
balance source
mode tcp
option tcpka
option mysql-check user haproxy
server controller1 10.0.0.11:3306 check weight 1
server controller2 10.0.0.12:3306 backup check weight 1
server controller3 10.0.0.13:3306 backup check weight 1
#Mariadb 创建Health Check用户以启用监控检测
mysql -uroot -pcctcloud -e "CREATE USER 'haproxy'@'192.168.1.10';"
#192.168.1.10为haproxy主机ip,可以替换为%
