一、安装PXC要求

1、强烈推荐3个节点以上且硬件配置一样，一个节点性能受影响，整体受影响，遵循木桶效应

2、如果DDL语句有问题将破坏集群

3、创建数据库表引擎必须是INNODB，否则复合sql语句无法同步

4、创建数据库表必须要有主键索引，否则集群中有一台数据库会down掉

二、在线安装

yum remove -y mysql-libs

rpm -qa |grep  Percona-Server |grep -v compat |xargs rpm -e --nodeps

yum install -y cmake gcc gcc-c++ libaio libaio-devel automake autoconf bzr bison libtool ncurses5-devel

yum install -y http://www.percona.com/downloads/percona-release/redhat/0.1-3/percona-release-0.1-3.noarch.rpm

yum install -y http://mirrors.yun-idc.com/epel/6/i386/epel-release-6-8.noarch.rpm

yum makecache

yum install -y Percona-XtraDB-Cluster-55.x86_64

三、配置

1、关闭selinux,防火墙开通3306,4444,4567,4568端口

2、节点DB1配置：cat /etc/my.cnf        

[mysqld]

port        = 3306

socket        = /tmp/mysql.sock

datadir         = /data/mysql_xx

pid-file        = /data/mysql_xx/mysql.pid

log-error       = /data/mysql_xx/mysql.err

log-bin         = /log/mysql_xx/mysql-bin-fookii

max_tmp_tables = 64

character-set-server=utf8

skip-name-resolve

log-slave-updates

slave-skip-errors = 1052

back_log = 5000

max_connections = 1024

max_connect_errors = 100

table_open_cache = 4096

max_allowed_packet = 128M

binlog_cache_size = 1M

max_heap_table_size = 64M

read_buffer_size = 2M

read_rnd_buffer_size = 16M

sort_buffer_size = 8M

join_buffer_size = 8M

thread_cache_size = 48

query_cache_type=0

query_cache_size=0M

query_cache_limit = 2M

ft_min_word_len = 4

default-storage-engine = InnoDB

thread_stack = 192K

transaction_isolation = REPEATABLE-READ

tmp_table_size = 64M

slow_query_log

long_query_time = 2

server-id = 1010

bulk_insert_buffer_size = 64M

innodb_buffer_pool_size = 21G

innodb_io_capacity =100

innodb_file_per_table = 1

innodb_file_format=barracuda

innodb_flush_method=O_DIRECT

innodb_data_file_path =ibdata1:100M;ibdata2:100M:autoextend

innodb_write_io_threads = 16

innodb_read_io_threads = 8

innodb_thread_concurrency = 16

sync_binlog=1

innodb_flush_log_at_trx_commit = 0

innodb_log_buffer_size = 8M

innodb_log_files_in_group = 3

innodb_max_dirty_pages_pct = 90

innodb_lock_wait_timeout = 120

expire_logs_days = 30

innodb_log_file_size=1000M

innodb_fast_checksum=0

innodb_page_size=16384

innodb_log_block_size=512

log_bin_trust_function_creators = 1  

wait_timeout=120

interactive_timeout=120

open-files-limit = 65535

default-time-zone=‘+8:00‘

group_concat_max_len=10240

启动服务器，测试能否正常启动

/etc/init.d/mysql start

添加使用XtraBackup进行SST传输帐号

CREATE USER ‘sstuser‘%‘localhost‘ IDENTIFIED BY ‘123abc‘;

GRANT RELOAD, LOCK TABLES, REPLICATION CLIENT ON *.*;

FLUSH PRIVILEGES;

3、 配置文件里添加集群参数

/etc/init.d/mysql stop

cat /etc/my.cnf

wsrep_provider=/usr/lib64/libgalera_smm.so

wsrep_cluster_address="gcomm://10.0.10.10,10.0.10.11,10.0.10.12"

wsrep_sst_receive_address=10.0.10.10:4444

wsrep_provider_options="gcache.size=5G;gcache.page_size=1G"

wsrep_node_name=ip-10-0-10-10

wsrep_sst_auth="sstuser:123abc"

wsrep_replicate_myisam=on

wsrep_restart_slave=on

wsrep_sync_wait=1

wsrep_auto_increment_control=off

auto_increment_increment=1

auto_increment_offset =1

binlog_format=ROW

log_slave_updates

default_storage_engine=InnoDB

innodb_autoinc_lock_mode=2

wsrep_slave_threads=4

wsrep_sst_method=rsync

wsrep_cluster_name=xx_cluster

wsrep_debug=0

4、集群中第一个节点启动命令

/etc/init.d/mysql bootstrap-pxc

centos7.0启动命令:

systemctl start mysql@bootstrap.service

5、启动后查看运行状态

mysql> show status like ‘wsrep%‘;

显示：

wsrep_cluster_size 1

wsrep_cluster_status Primary

wsrep_connected ON

wsrep_ready ON

说明DB1节点配置成功

6、节点DB2配置

DB2配置按DB1配置类似，唯一几个参数不同修改如下：

server-id = 1011

wsrep_sst_receive_address=10.0.10.11:4444

wsrep_node_name=ip-10-0-10-11

启动DB2：

/etc/init.d/mysql start

启动后查看运行状态

mysql> show status like ‘wsrep%‘;

显示：

wsrep_cluster_size 2

wsrep_cluster_status Primary

wsrep_connected ON

wsrep_ready ON

说明DB2节点配置成功

6、节点DB3配置

DB3配置按DB1配置类似，唯一几个参数不同修改如下：

server-id = 1012

wsrep_sst_receive_address=10.0.10.12:4444

wsrep_node_name=ip-10-0-10-12

启动DB3：

/etc/init.d/mysql start

启动后查看运行状态

mysql> show status like ‘wsrep%‘;

显示：

wsrep_cluster_size 3

wsrep_cluster_status Primary

wsrep_connected ON

wsrep_ready ON

说明DB3节点配置成功

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percona xtradb cluster 5.5集群生产环境安装之二