centos6.9怎么搭建pxc集群

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一：环境介绍：

10.1.32.49

10.1.32.50

10.1.32.36

其中操作系统全部为 ：centos 6.9 ，并且49和50是数据库集群的数据节点，36为鉴证节点或者叫选举节点，安装的percona 5.6版本，其中鉴证节点的garb安装的是garbd-3版本

二：正式安装：

2.1.首先安装相关的yum 源：

1-3版本的yum源：

yum installhttp://www.percona.com/downloads/percona-release/redhat/0.1-3/percona-release-0.1-3.noarch.rpm

1-4版本的yum源：（一般选择新版本）

yum install http://www.percona.com/downloads/percona-release/redhat/0.1-4/percona-release-0.1-4.noarch.rpm

装一些centos源里面没有的软件的源

yum install http://mirrors.ustc.edu.cn/fedora/epel/6/i386/epel-release-6-8.noarch.rpm

查看关于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 关闭防火墙和 Selinux

service iptables stop

chkconfig iptables off

vi /etc/selinux/config

SELINUX=disabled

2.2.查看已经安装的Percona的版本，如果不是自己需要的，那么卸载掉，防止冲突！

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

或者

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

卸载系统本身有的Percona

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

安装pxc具体需要安装下面几个包，真正安装的时候只需要Percona-XtraDB-Cluster-server-56即可，其余的都作为依赖包自动安装上了！

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

查看Percona的各个版本的包的名字，以便于具体选择特定的版本：

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

2.3使用yum安装，只需要安装 Percona-XtraDB-Cluster-server即可，别的都是他的依赖包，一并都给自动安装了，如下我们选择的是5.6版本的mysql：

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

2.4.然后配置参数/etc/my.cnf，两个数据节点配置参数基本相同，需要改个别参数；

[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初始化数据库主节点：其他的不用刻意的初始化，因为等你启动第二个节点的时候他会sst同步给第二个节点

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

2.6.删除匿名账号

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

2.7.给管理员账号设密码

mysqladmin -u root password $password

2.8.每台机器mysql添加SST账户

其实只需要在主节点添加即可，因为等你启动第二个节点的时候他会sst同步给第二个节点,那么用户也会同步过去。注意用户名和密码需要在参数wsrep_sst_auth中对应！

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

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

2.9.启动主节点（以bootstrap-pxc方式启动）：

[root@ory-newcaiwu-mysql-01 ~]# /etc/init.d/mysql #显示mysql启动全部方式！

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

以bootstrap-pxc方式启动：

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

3.0.启动节点32.50,会自动触发集群主节点32.49给它全量同步数据（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 鉴证节点相关操作：

3.1.安装garb服务:

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

3.2.配置gab参数：

[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.启动gab服务：

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

其中时候你会发现集群节点数量增加了1，由2变成了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)

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