新節點在線加入PXC
環境
192.168.139.151 新增節點
192.168.139.148-150 集群節點
192.168.139.151 已經安裝好PXC軟件
計劃：
選用192.168.139.150 節點先與192.168.139.151組成主從節點
再轉成集群節點
構建主從環境
150 節點創建主從同步賬號：
mysql>create user ‘bak‘@‘192.168.139.%‘ identified by ‘123456‘;
mysql>grant replication slave on *.* to ‘bak‘@‘192.168.139.%‘;
mysql>flush privileges;
150數據拷貝至151上
#mysqldump --single-transaction -uroot -p123456 -A --master-data=2 > all.sql
#scp all.sql [email protected]:/opt/
151上恢復數據
mysql>SET GLOBAL pxc_strict_mode=PERMISSIVE;
#mysql -u root -p123456 < all.sql
151配置主從同步
#####master_log 信息可在150 使用flsuh logs ; show master status查看
change master to master_host=‘192.168.139.150‘,master_user=‘bak‘,master_password=‘123456‘,master_log_file=‘pxc-bin.000001‘,master_log_pos=928;
151開啟同步
start slave;
show slave status\G;
151配置集群
systemctl stop mysql
vim /etc/my.cnf ===>註意文件下面的include ，配置文件可能在指定路徑中，my.cnf只是類似於軟鏈
server-id=4 #與集群中其他的節點不一樣
[mysqld]# Path to Galera library
wsrep_provider=/usr/lib64/galera3/libgalera_smm.so # Cluster connection URL contains IPs of nodes
#If no IP is found, this implies that a new cluster needs to be created,
#in order to do that you need to bootstrap this node
wsrep_cluster_address=gcomm://192.168.139.148,192.168.139.149,192.168.139.150,192.168.139.151 # In order for Galera to work correctly binlog format should be ROW
binlog_format=ROW # MyISAM storage engine has only experimental support
default_storage_engine=InnoDB # Slave thread to use
wsrep_slave_threads= 8 wsrep_log_conflicts # This changes how InnoDB autoincrement locks are managed and is a requirement for Galera
innodb_autoinc_lock_mode=2 # Node IP address
wsrep_node_address=192.168.139.151
# Cluster name
wsrep_cluster_name=pxc-cluster #If wsrep_node_name is not specified, then system hostname will be used
wsrep_node_name=pxc-cluster-node-4 #pxc_strict_mode allowed values: DISABLED,PERMISSIVE,ENFORCING,MASTER
pxc_strict_mode=ENFORCING # SST method
wsrep_sst_method=xtrabackup-v2 #Authentication for SST method
srep_sst_auth="sstuser:passw0rd"
150檢查PXC需要同步位置
mysqlbinlog -v -v mysql-bin.000001 | grep Xid ===》找到position 對應的，沒有 就在MySQL中的表隨便插入什麽東西，執行commit ,在查詢
scp /var/lib/mysql/grastate.dat [email protected]:/var/lib/mysql/
151編輯文件
vim /var/lib/mysql/grastate.dat seqno ===> 修改成Xid對應的值 chown mysql:mysql /var/lib/mysql/grastate.dat systemctl start mysql151查看測試結果：
mysql> show status like ‘wsrep%‘; 可在其他節點插入數據，查看151節點的數據是否同步
新節點在線加入PXC