基於CentOS 7 安裝Percona XtraDB Cluster(PXC) 5.7
阿新 • • 發佈：2018-12-16
轉載來源：https://blog.csdn.net/robinson_0612/article/details/78962190
基於CentOS 7 安裝Percona XtraDB Cluster(PXC) 5.7
Percona XtraDB Cluster(簡稱PXC)是很多企業基於MySQL實現叢集方案的不二選擇。PXC它支援服務高可用,資料同步複製(併發複製)，幾乎無延遲；多個可同時讀寫節點，可實現寫擴充套件等等。之前整理過一篇PXC 5.6的文章，本文是基於CentOS 7 PXC 5.7版一個更為標準的安裝，可供大家參考。
一、當前OS環境
[[email protected] ~]# more /etc/redhat-release
CentOS Linux release 7.2.1511 (Core)
二、配置執行環境
1、修改主機hosts檔案
[[email protected] ~]# vim /etc/hosts 127.0.0.1 localhost.localdomain localhost 192.168.81.142 node142.example.com node142 192.168.81.146 node146.example.com node146 192.168.81.147 node147.example.com node147
2、修改selinux配置檔案
[[email protected] ~]# vim /etc/selinux/config
SELINUX=disabled
3、分發配置檔案到其餘節點
[[email protected] ~]# scp /etc/hosts 192.168.81.146:/etc/hosts
[[email protected] ~]# scp /etc/hosts 192.168.81.147:/etc/hosts
[[email protected] ~]# scp /etc/selinux/config 192.168.81.146:/etc/selinux/config
[
4、分別3節點配置防火牆，如下示例(僅列出一個節點)
[[email protected] ~]# firewall-cmd --add-port=3306/tcp --permanent
[[email protected] ~]# firewall-cmd --add-port=4567/tcp --permanent
[[email protected] ~]# firewall-cmd --add-port=4568/tcp --permanent
[[email protected] ~]# firewall-cmd --add-port=4444/tcp --permanent
[[email protected] ~]# firewall-cmd --reload
5、配置時間同步服務
[[email protected] ~]# crontab -e
*/10 * * * * ntpdate ntp3.aliyun.com
6、分別重啟3節點
[[email protected] ~]# reboot
[[email protected] ~]# reboot
[[email protected] ~]# reboot
三、安裝Percona XtraDB Cluster 5.7
1、3節點分別安裝Percona XtraDB Cluster 5.7 (如下示例)
[[email protected] ~]# rpm -Uvh https://www.percona.com/downloads/percona-release/redhat/latest/percona-release-0.1-4.noarch.rpm
[[email protected] ~]# yum install Percona-XtraDB-Cluster-57 -y
yum安裝時會提示UDFs功能，根據需要可以在mysql啟動後執行以下語句
Percona XtraDB Cluster is distributed with several useful UDFs from Percona Toolkit.
Run the following commands to create these functions:
mysql -e "CREATE FUNCTION fnv1a_64 RETURNS INTEGER SONAME 'libfnv1a_udf.so'"
mysql -e "CREATE FUNCTION fnv_64 RETURNS INTEGER SONAME 'libfnv_udf.so'"
mysql -e "CREATE FUNCTION murmur_hash RETURNS INTEGER SONAME 'libmurmur_udf.so'"
四、配置mysql及叢集配置檔案
主要包括mysqld.cnf，mysqld_safe.cnf，wsrep.cnf
在當前的這個版本中，my.cnf為主配置檔案，其餘的配置檔案放在/etc/percona-xtradb-cluster.conf.d目錄
在這幾個配置檔案中，大家根據自己的需要定製，本演示僅作基本修改
1、備份配置檔案
[[email protected] ~]# cp /etc/percona-xtradb-cluster.conf.d/mysqld.cnf{,.org}
[[email protected] ~]# cp /etc/percona-xtradb-cluster.conf.d/mysqld_safe.cnf{,.org}
[[email protected] ~]# cp /etc/percona-xtradb-cluster.conf.d/wsrep.cnf{,.org}
2、修改配置檔案
[[email protected] ~]# vim /etc/percona-xtradb-cluster.conf.d/mysqld.cnf
[[email protected] ~]# more /etc/percona-xtradb-cluster.conf.d/mysqld.cnf
# Template my.cnf for PXC
# Edit to your requirements.
[client]
socket=/var/lib/mysql/mysql.sock
[mysqld]
server-id=142 #這個引數3個節點要使用不同的id
datadir=/var/lib/mysql
socket=/var/lib/mysql/mysql.sock
log-error=/var/log/mysqld.log
pid-file=/var/run/mysqld/mysqld.pid
log-bin=/var/lib/mysqlbin
log_slave_updates
expire_logs_days=7
# Disabling symbolic-links is recommended to prevent assorted security risks
symbolic-links=0
log_bin_trust_function_creators=on
character_set_server = utf8 ##Author : Leshami
collation_server = utf8_bin ##Blog : http://blog.csdn.net/leshami[[email protected] ~]# vim /etc/percona-xtradb-cluster.conf.d/wsrep.cnf
[[email protected] ~]# grep -vE "^#|^$" /etc/percona-xtradb-cluster.conf.d/wsrep.cnf
[mysqld]
wsrep_provider=/usr/lib64/galera3/libgalera_smm.so
wsrep_cluster_address=gcomm://192.168.81.142,192.168.81.146,192.168.81.147
binlog_format=ROW
default_storage_engine=InnoDB
wsrep_slave_threads= 8
wsrep_log_conflicts
innodb_autoinc_lock_mode=2
wsrep_node_address=192.168.81.142 ##這個引數要改成相應的IP
wsrep_cluster_name=pxc-cluster
wsrep_node_name=node142 ##這個引數要改成相應的節點名稱
pxc_strict_mode=PERMISSIVE
wsrep_sst_method=xtrabackup-v2
wsrep_sst_auth="sstuser:s3cretPass"
3、修改剩餘節點配置檔案
[[email protected] ~]# cp /etc/percona-xtradb-cluster.conf.d/mysqld.cnf{,.146}
[[email protected] ~]# cp /etc/percona-xtradb-cluster.conf.d/mysqld.cnf{,.147}
[[email protected] ~]# cp /etc/percona-xtradb-cluster.conf.d/wsrep.cnf{,.146}
[[email protected] ~]# cp /etc/percona-xtradb-cluster.conf.d/wsrep.cnf{,.147}
[[email protected] ~]# vim /etc/percona-xtradb-cluster.conf.d/mysqld.cnf.146 #修改對應的server_id
[[email protected] ~]# vim/etc/percona-xtradb-cluster.conf.d/mysqld.cnf.147 #修改對應的server_id
# 以下操作，分別修改wsrep_node_name，wsrep_node_address至相應的節點名稱以及IP地址
[[email protected] ~]# vim /etc/percona-xtradb-cluster.conf.d/wsrep.cnf.146
[[email protected] ~]# vim /etc/percona-xtradb-cluster.conf.d/wsrep.cnf.147
4、比較配置檔案，並將配置檔案分發到各個節點
[[email protected] ~]# cd /etc/percona-xtradb-cluster.conf.d/
[[email protected] percona-xtradb-cluster.conf.d]# diff mysqld.cnf mysqld.cnf.146
7c7
< server-id=142
---
> server-id=146
[[email protected] percona-xtradb-cluster.conf.d]# diff mysqld.cnf mysqld.cnf.147
7c7
< server-id=142
---
> server-id=147
[[email protected] percona-xtradb-cluster.conf.d]# diff wsrep.cnf wsrep.cnf.146
28c28
< wsrep_node_address=192.168.81.142
---
> wsrep_node_address=192.168.81.146
32c32
< wsrep_node_name=node142
---
> wsrep_node_name=node146
[[email protected] percona-xtradb-cluster.conf.d]# diff wsrep.cnf wsrep.cnf.147
28c28
< wsrep_node_address=192.168.81.142
---
> wsrep_node_address=192.168.81.147
32c32
< wsrep_node_name=node142
---
> wsrep_node_name=node147
[[email protected] percona-xtradb-cluster.conf.d]# scp mysqld.cnf.146 node146:/etc/percona-xtradb-cluster.conf.d/mysqld.cnf
[[email protected] percona-xtradb-cluster.conf.d]# scp wsrep.cnf.146 node146:/etc/percona-xtradb-cluster.conf.d/wsrep.cnf
[[email protected] percona-xtradb-cluster.conf.d]# scp mysqld.cnf.147 node147:/etc/percona-xtradb-cluster.conf.d/mysqld.cnf
[[email protected] percona-xtradb-cluster.conf.d]# scp wsrep.cnf.147 node147:/etc/percona-xtradb-cluster.conf.d/wsrep.cnf五、啟動PXC叢集
1、啟動第一個節點
[[email protected] ~]# systemctl start [email protected]
[[email protected] ~]# grep "temporary password" /var/log/mysqld.log
2017-12-28T08:57:24.231185Z 1 [Note] A temporary password is generated for [email protected]: wj!v<z/2)ctZ
[[email protected] ~]# mysql -uroot -p
Enter password:
mysql> alter user 'root'@'localhost' identified by '123456';
mysql> create user 'sstuser'@'localhost' identified by 's3cretpass';
mysql> grant reload, lock tables, replication client, process on *.* to 'sstuser'@'localhost';
2、啟動剩餘節點
[[email protected] ~]# systemctl start mysql
[[email protected] ~]# systemctl start mysql
注，如果你使用的是CentOS7.2.1511，會發現mysql可以正常啟動，但是未加入叢集的情況
需要升級openssl，建議全部升級後再啟動叢集，這問題在CentOS 7.4.1708不存在即openssl版本較新
六、驗證叢集
在146上完成如下操作
[[email protected] ~]# mysql -uroot -p
mysql> show variables like 'version';
+---------------+--------------+
| Variable_name | Value |
+---------------+--------------+
| version | 5.7.19-17-57 |
+---------------+--------------+
1 row in set (0.00 sec)
mysql> create database pxcdb;
mysql> use pxcdb;
mysql> create table t1(id tinyint,ename varchar(20));
mysql> insert into t1 values(1,'Leshami');
在147上進行驗證
[[email protected] ~]# mysql -uroot -p
mysql> show databases;
+--------------------+
| Database |
+--------------------+
| information_schema |
| mysql |
| performance_schema |
| pxcdb |
| sys |
+--------------------+
5 rows in set (0.00 sec)
mysql> show variables like 'server_id';
+---------------+-------+
| Variable_name | Value |
+---------------+-------+
| server_id | 147 |
+---------------+-------+
1 row in set (0.01 sec)
mysql> select * from pxcdb.t1;
+------+---------+
| id | ename |
+------+---------+
| 1 | Leshami |
+------+---------+
1 row in set (0.00 sec)
--檢視叢集狀態
mysql> show status like '%wsrep_clust%';
+--------------------------+--------------------------------------+
| Variable_name | Value |
+--------------------------+--------------------------------------+
| wsrep_cluster_conf_id | 13 | ## Author : Leshami
| wsrep_cluster_size | 3 | ## Blog : http://blog.csdn.net/leshami
| wsrep_cluster_state_uuid | aeb87793-ebb2-11e7-b33e-eeaf4988bbe4 |
| wsrep_cluster_status | Primary | ## Weixin/QQ : 645746311
+--------------------------+--------------------------------------+
4 rows in set (0.00 sec)
mysql> show status like 'wsrep_connected';
+-----------------+-------+
| Variable_name | Value |
+-----------------+-------+
| wsrep_connected | ON |
+-----------------+-------+
1 row in set (0.00 sec)
七、openssl版本過低導致的錯誤
2017-12-28T09:23:19.605353Z 0 [ERROR] WSREP: wsrep_load(): dlopen(): /usr/lib64/galera3/libgalera_smm.so:
symbol SSL_COMP_free_compression_methods, version libssl.so.10 not defined in file libssl.so.10 with link time reference
2017-12-28T09:23:19.605379Z 0 [ERROR] WSREP: Failed to load wsrep_provider (/usr/lib64/galera3/libgalera_smm.so).
Error: Invalid argument (code: 22). Reverting to no provider.
2017-12-28T09:23:19.605386Z 0 [Note] WSREP: Setting wsrep_ready to false
[[email protected] ~]# rpm -qa|grep openssl
openssl-1.0.1e-42.el7.9.x86_64
openssl-libs-1.0.1e-42.el7.9.x86_64
[[email protected] ~]# yum update openssl -y
作者：Leshami 原文：https://blog.csdn.net/leshami/article/details/78962190