一：環境介紹：

10.1.32.49

10.1.32.50

10.1.32.36

其中作業系統全部為：centos 6.9 ，並且49和50是資料庫叢集的資料節點，36為鑑證節點或者叫選舉節點，安裝的percona 5.6版本，其中鑑證節點的garb安裝的是garbd-3版本

二：正式安裝：

2.1.首先安裝相關的yum 源：

1-3版本的yum源：

yum install

1-4版本的yum源：（一般選擇新版本）

yum install

裝一些centos源裡面沒有的軟體的源

yum install

檢視關於percona的yum源存在否：

[root@ory-newcaiwu-mysql-02 ~]# rpm -qa | grep percona

percona-xtrabackup-24-2.4.9-1.el6.x86_64

percona-release-0.1-4.noarch

percona-toolkit-3.0.6-1.el6.x86_64

2.2 關閉防火牆和 Selinux

service iptables stop

chkconfig iptables off

vi /etc/selinux/config

SELINUX=disabled

2.2.檢視已經安裝的Percona的版本，如果不是自己需要的，那麼解除安裝掉，防止衝突！

[root@ory-newcaiwu-mysql-01 ~]# yum list Percona*

或者

[root@ory-newcaiwu-mysql-02 ~]# rpm -qa | grep Percona*

解除安裝系統本身有的 Percona

[root@ory-newcaiwu-mysql-01 ~]# yum remove Percona*

安裝pxc具體需要安裝下面幾個包，真正安裝的時候只需要 Percona-XtraDB-Cluster-server-56即可，其餘的都作為依賴包自動安裝上了！

yum -y install Percona-XtraDB-Cluster-server Percona-XtraDB-Cluster-client Percona-Server-shared-compat percona-xtrabackup

檢視Percona的各個版本的包的名字，以便於具體選擇特定的版本：

[root@ory-newcaiwu-mysql-02 ~]# rpm -qa | grep Percona*

2.3使用yum安裝，只需要安裝 Percona-XtraDB-Cluster-server即可，別的都是他的依賴包，一併都給自動安裝了，如下我們選擇的是5.6版本的mysql：

[root@ory-newcaiwu-mysql-02 ~]# yum install -y Percona-XtraDB-Cluster-server-56

2.4.然後配置引數/etc/my.cnf，兩個資料節點配置引數基本相同，需要改個別引數；

[mysqld]
# GENERAL
datadir                                                                 = /data/mysqldata
tmpdir                                                                  = /tmp
socket                                                                  = /data/mysqldata/mysql.sock
pid_file                                                                = /data/mysqldata/mysql.pid
user                                                                    = mysql
port                                                                    = 3306
character-set-server                                                    = utf8
bind-address                                                            = 0.0.0.0
server-id                                                               = 1013250
skip-name-resolve
lower_case_table_names                                                  = 1
# INNODB
# This changes how |InnoDB| autoincrement locks are managed and is a requirement for Galera
innodb_autoinc_lock_mode                                                = 2
innodb_buffer_pool_size                                                 = 90G
innodb_buffer_pool_instances                                            = 8
innodb_thread_concurrency                                               = 40
innodb_log_buffer_size                                                  = 32M
innodb_log_file_size                                                    = 1024M
innodb_online_alter_log_max_size                                        = 512M
innodb_open_files                                                       = 65535
innodb_purge_threads                                                    = 8
innodb_data_home_dir                                                    = /data/mysqldata
innodb_data_file_path                                                   = ibdata1:256M:autoextend
innodb_read_io_threads                                                  = 8
innodb_write_io_threads                                                 = 8
innodb_file_per_table                                                   = 1
innodb_flush_method                                                     = O_DIRECT
innodb_flush_log_at_trx_commit                                          = 2
innodb_max_dirty_pages_pct                                              = 90
innodb_file_format                                                      = Barracuda
innodb_file_format_max                                                  = Barracuda
innodb_io_capacity                                                      = 512
innodb_io_capacity_max                                                  = 4096

#event_scheduler = OFF

# MyISAM
key_buffer_size = 32M

# LOGS
#general_log                                                            = 1
#general_log_file                                                       = /data/logs/mysql/mysql_general.log
log_warnings                                                            = 2
log_error                                                               = /data/logs/mysql/mysql_error.log
slow_query_log                                                          = ON
slow_query_log_file                                                     = /data/logs/mysql/mysql_slow.log
log_queries_not_using_indexes                                           = 0
long_query_time                                                         = 1
expire_logs_days                                                        = 15
log-bin                                                                 = mysql-bin.log
innodb_print_all_deadlocks                                              = 1
relay-log                                                               = relay-log
relay-log-index                                                         = relay-log
log_bin_trust_function_creators                                         = 1
# BINLOG
# In order for Galera to work correctly binlog format should be ROW
binlog_format                                                           = ROW
binlog_cache_size                                                       = 32M
max_binlog_size                                                         = 512M
log_bin_trust_function_creators                                         = 1

# OTHER
default_storage_engine                                                  = InnoDB
tmp_table_size                                                          = 32M
max_heap_table_size                                                     = 128M
query_cache_type                                                        = 0
query_cache_size                                                        = 0M
max_connections                                                         = 1024
thread_cache_size                                                       = 600
open_files_limit                                                        = 65535
innodb_buffer_pool_load_at_startup                                      = ON
innodb_buffer_pool_dump_at_shutdown                                     = ON
auto_increment_offset                                                   = 1
optimizer-switch                                                        = "mrr=on,mrr_cost_based=off,batched_key_access=on"
join_buffer_size                                                        = 16M
expand_fast_index_creation                                              = 1
sort_buffer_size                                                        = 16M
max_allowed_packet                                                      = 16M
sql_mode                                                                = STRICT_TRANS_TABLES,NO_ENGINE_SUBSTITUTION
# WSREP
wsrep_auto_increment_control                                            = OFF
# Path to Galera library
wsrep_provider                                                          = /usr/lib64/libgalera_smm.so
# Cluster connection URL
wsrep_cluster_address                                                   = gcomm://10.1.32.49:4567,10.1.32.50:4567
# Node #1 address
wsrep_node_address                                                      = 10.1.32.50 # local IP
# SST method
wsrep_sst_method                                                        = xtrabackup-v2
# Cluster name
wsrep_cluster_name                                                      = XFXJ_CAIWU_CLUSTER
# Authentication for SST method
wsrep_sst_auth                                                          = "sstuser:LLivTGmIWpVohjMD"
wsrep_max_ws_rows                                                       = 500000
wsrep_max_ws_size                                                       = 2147483647
wsrep_slave_threads                                                     = 40
wsrep_provider_options                                                  = "gcache.size=32G; gcache.page_size=512M; gcs.fc_limit = 4096;gcs.fc_master_slave = yes"

#Replication
log_slave_updates                                                       = 1
slave_parallel_worker                                                   = 4
gtid-mode                                                               = on
enforce_gtid_consistency                                                = true
binlog_checksum                                                         = CRC32
slave_allow_batching                                                    = 1
master_verify_checksum                                                  = 1
slave_sql_verify_checksum                                               = 1
master_info_repository                                                  = TABLE
relay_log_info_repository                                               = TABLE

[client]
socket                                                                  = /data/mysqldata/mysql.sock
port                                                                    = 3306
#default_character_set                                                  = utf8
[mysql]
default-character-set                                                   = utf8
prompt                                                                  ="\\u@\\h : \\d \\R:\\m:\\s>"
no-auto-rehash

2.5初始化資料庫主節點：其他的不用刻意的初始化，因為等你啟動第二個節點的時候他會sst同步給第二個節點

mysql_install_db --defaults-file=/etc/my.cnf --user=mysql

2.6.刪除匿名賬號

mysql -e "delete from mysql.user where user=' ';delete from mysql.user where user='';flush privileges;"

2.7.給管理員賬號設密碼

mysqladmin -u root password $password

2.8.每臺機器mysql新增SST賬戶

其實只需要在主節點新增即可，因為等你啟動第二個節點的時候他會sst同步給第二個節點,那麼使用者也會同步過去。注意使用者名稱和密碼需要在引數wsrep_sst_auth中對應！

CREATE USER 'sstuser' @ 'localhost' IDENTIFIED BY 'liuwenhe' ;

GRANT RELOAD, LOCK TABLES, REPLICATION CLIENT,PROCESS ON *.* TO 'sstuser' @ 'localhost' ;

2.9.啟動主節點（以bootstrap-pxc方式啟動）：

[root@ory-newcaiwu-mysql-01 ~]# /etc/init.d/mysql #顯示mysql啟動全部方式！

Usage: mysql {start|stop|restart|restart-bootstrap|reload|force-reload|status|bootstrap-pxc} [ MySQL (Percona XtraDB Cluster) options ]

以bootstrap-pxc方式啟動：

[root@ory-newcaiwu-mysql-01 ~]# /etc/init.d/mysql bootstrap-pxc

3.0.啟動節點32.50,會自動觸發叢集主節點32.49給它全量同步資料（也就是sst)

[root@ory-newcaiwu-mysql-02 mysqldata]# /etc/init.d/mysql start

Starting MySQL (Percona XtraDB Cluster)...State transfer in progress, setting sleep higher

.... [ OK ]

三：32.36上鑑證節點相關操作：

3.1.安裝garb服務:

[root@ory-fanxiqian-Oracle-01 ~]# yum install Percona-XtraDB-Cluster-garbd-3

3.2.配置gab引數：

[root@ory-fanxiqian-Oracle-01 ~]# cat /etc/sysconfig/garb

# A comma-separated list of node addresses (address[:port]) in the cluster

GALERA_NODES="10.1.32.36:4567 10.1.32.49:4567 10.1.32.50:4567"

# Galera cluster name, should be the same as on the rest of the nodes.

GALERA_GROUP="XFXJ_CAIWU_CLUSTER"

# Optional Galera internal options string (e.g. SSL settings)

# see http://galeracluster.com/documentation-webpages/galeraparameters.html

# GALERA_OPTIONS=""

# Log file for garbd. Optional, by default logs to syslog

# Deprecated for CentOS7, use journalctl to query the log for garbd

LOG_FILE="/tmp/garbd.log"

3.3.啟動gab服務：

root@localhost : (none) 17:57:32>show status like 'wsrep_cluster_size';

+--------------------+-------+

| Variable_name | Value |

+--------------------+-------+

| wsrep_cluster_size | 2 |

+--------------------+-------+

1 row in set (0.00 sec)

[root@ory-fanxiqian-Oracle-01 ~]# /etc/init.d/garb start

其中時候你會發現叢集節點數量增加了1，由2變成了3；

root@localhost : (none) 17:57:32>show status like 'wsrep_cluster_size';

+--------------------+-------+

| Variable_name | Value |

+--------------------+-------+

| wsrep_cluster_size | 3 |

+--------------------+-------+

1 row in set (0.00 sec)

至此兩個資料節點+一個仲裁節點的pxc架構搭建完畢，至於相關的引數最佳化接下來繼續更新。。。。

centos 6.9搭建pxc叢集

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