Galera 10.0.20 on CentOS 6.6，galeracentos
Galera 10.0.20 on CentOS 6.6
0.使用场景
数据库软件：mariadb-galera-10.0.20-linux-x86_64.tar.gz
集群管理：galera-3-25.3.10
节点同步方式（xtrabackup,rsync)：percona-xtrabackup-2.2.8-5059.el6.x86_64.rpm
节点同步使用sockt：socat-2.0.0-b7.tar.gz
安装galera是为了获得libgalera_smm.so；
安装xtrabackup是为了配置同步方式xtrabackup，节点数据同步的时候用到；
安装socat是因为同步数据使用socket方式进行端到端的数据交换；
数据库节点:
127.0.0.1 localhost localhost
192.168.50.10 db01 db01.mysql.com
192.168.50.20 db02 db02.mysql.com
192.168.50.30 db03 db03.mysql.com
1.系统安装
——–0.删除postfix
yum remove postfix
——–1.系统安装
参见:Linux for Mysql 系统安装规范
——-2 配置yum源
cd /etc/yum.repos.d
mv CentOS-Base.repo CentOS-Base.repo.old
阿里镜像
wget -O /etc/yum.repos.d/CentOS-Base.repo http://mirrors.aliyun.com/repo/Centos-6.repo
163镜像
wget http://mirrors.163.com/.help/CentOS6-Base-163.repo
yum makecache
检查可更新的rpm包
yum check-update
更新所有的rpm包
yum update
—3.关闭防火墙和selinux
chkconfig –level 123456 iptables off
service iptables stop
/usr/sbin/sestatus -v | grep “SELinux status”
vi /etc/selinux/config
SELINUX=disabled
—4.修改各个节点hosts
vi /etc/hosts
192.168.50.10 db01 db01.mysql.com
192.168.50.20 db02 db02.mysql.com
192.168.50.30 db03 db03.mysql.com
—4.rz
yum install lrzsz -y
2.mysql安装部分
一：卸载旧版本
使用下面的命令检查是否安装有MySQL Server
rpm -qa | grep mysql
有的话通过下面的命令来卸载掉
rpm -e mysql //普通删除模式
rpm -e –nodeps mysql
rpm -e –nodeps mysql-devel
rpm -e –nodeps mysql-libs
// 强力删除模式，如果使用上面命令删除时，提示有依赖的其它文件，
则用该命令可以对其进行强力删除
yum remove mysql-libs
二：安装MySQL
1.安装编译代码需要的包
yum -y install cmake gcc gcc-c++ autoconf automake zlib* libxml* \
ncurses ncurses-devel libtool libtool-ltdl-devel* make bison bison-devel \
openssl-devel libevent-devel \
libaio libaio-devel pam-devel boost boost-devel valgrind-devel \
libnl-devel popt-devel popt-static bzr
2.为mysql新建组和用户
groupadd mysql
useradd -s /sbin/nologin -g mysql -M mysql
passwd mysql
mysql01!
id mysql
3.设置用户的系统资源限制
vi /etc/security/limits.conf
mysql soft nproc 2047
mysql hard nproc 16384
mysql soft nofile 1024
mysql hard nofile 65536
4.编译安装
tar xf mariadb-galera-10.0.20.tar.gz
cd mariadb-10.0.20
编译安装
/*
cmake . -LH –查看cmake支持的mysql相关参数
shell> cmake . -L # overview
shell> cmake . -LH # overview with help text
shell> cmake . -LAH # all params with help text
shell> ccmake . # interactive display
重新编译时，需要清除旧的对象文件和缓存信息
# make clean
# rm -f CMakeCache.txt
**/
cmake \
-DCMAKE_INSTALL_PREFIX=/data/mysql \
-DMYSQL_UNIX_ADDR=/data/mysql/mysql.sock \
-DWITH_INNOBASE_STORAGE_ENGINE=1 \
-DWITH_MYISAM_STORAGE_ENGINE=1 \
-DWITH_SPHINX_STORAGE_ENGINE=1 \
-DWITH_READLINE=1 \
-DMYSQL_DATADIR=/data/mysql/data \
-DMYSQL_TCP_PORT=33306 \
-DENABLED_LOCAL_INFILE=1 \
-DWITH_EXTRA_CHARSETS=all \
-DDEFAULT_CHARSET=utf8 \
-DDEFAULT_COLLATION=utf8_general_ci \
-DEXTRA_CHARSETS=all \
-DWITH_WSREP=1 \
-DWITH_INNODB_DISALLOW_WRITES=1
make -j4
make install
三：配置MySQL
1.新建数据文件、临时文件,修改/usr/local/mysql权限
mkdir -p /data/mysql
mkdir /data/mysql/{innodb_data,data,tmp} -p
mkdir /data/mysql/mysql_logs/{binary_log,innodb_log,query_log,slow_query_log,error_log} -p
2.修改权限
chown -R mysql /data/mysql
chgrp -R mysql /data/mysql
3.修改参数
rm -rf /etc/my.cnf
vi /data/mysql/my.cnf
链接文件
ln -fs /data/mysql/my.cnf /etc/my.cnf
ll /etc/my.cnf
lrwxrwxrwx. 1 root root 23 Nov 18 17:30 /etc/my.cnf -> /data/mysql/my.cnf
chown -R mysql /data/mysql
chgrp -R mysql /data/mysql
5.初始化数据库
cd /data/mysql/scripts
./mysql_install_db –defaults-file=/etc/my.cnf –user=mysql –basedir=/data/mysql \
–datadir=/data/mysql/data
6.启动MySQL
chown -R mysql /data/mysql
chgrp -R mysql /data/mysql
–6.1建议安全启动
/data/mysql/bin/mysqld_safe &
/data/mysql/bin/mysqld_safe –datadir=’/data/mysql/data’ &
–6.2添加服务，拷贝服务脚本到init.d目录，并设置开机启动
cd /data/mysql/
cp support-files/mysql.server /etc/init.d/mysql
chkconfig mysql on
7.配置mysql用户
MySQL启动成功后，root默认没有密码，我们需要设置root密码。
7.1修改/etc/profile文件，在文件末尾添加
vi + /etc/profile
PATH=/data/mysql/bin:$PATH
export PATH
source /etc/profile
现在，我们可以在终端内直接输入mysql进入，mysql的环境了
执行下面的命令修改root密码
–7.2修改mysql管理员密码
1.修改当前用户密码
mysql -uroot -p
SET PASSWORD = PASSWORD(‘pass01’);
flush privileges;
2.给所有的root用户设定密码：
第一种方式(推荐)
# mysql -uroot -p
MariaDB [(none)]>
MariaDB [(none)]> select host,user,password from mysql.user;
+————-+——+———-+
| host | user | password |
+————-+——+———-+
| localhost | root | |
| db02.zp.com | root | |
| 127.0.0.1 | root | |
| ::1 | root | |
| localhost | | |
| db02.zp.com | | |
+————-+——+———-+
6 rows in set (0.00 sec)
update mysql.user set password = password(‘pass01’) where user = ‘root’ limit 100;flush privileges;
flush privileges;
3.删除所有匿名用户(不要删除root@localhost)
DROP USER ”@’localhost’;delete from mysql.user where user=” limit 10;commit;flush privileges;
delete from mysql.user where host=’db01.mysql.com’;flush privileges;
delete from mysql.user where host=’db02.mysql.com’;flush privileges;
delete from mysql.user where host=’db03.mysql.com’;flush privileges;
–7.3设置root用户可以远程访问
–方法1：授权法
mysql>GRANT ALL PRIVILEGES ON . TO ‘root’@’%’ IDENTIFIED BY ‘pass01’ \
WITH GRANT OPTION;flush privileges;
select host,user,password from mysql.user;
–7.4 登录mysql
mysql -hlocalhost -uroot -ppass01
—-7.5设置linux脚本
vi + ~/.bash_profile
ocpyang set(绑定mysql到内网IP只能写内网IP)
alias mysql=”mysql -U -hlocalhost -uroot -ppass01 –auto-rehash”
alias errorlog=”cat /data/mysql/mysql_logs/error_log/error.log”
alias mycnf=”cd /data/mysql”
export PATH=/data/mysql/scripts:$PATH
source ~/.bash_profile
—-7.7修改权限
chown -R mysql /data/mysql
chgrp -R mysql /data/mysql
—-7.8 常见启动错误或警告
cat /data/mysql/mysql_logs/error_log/error.log
Warning] ‘proxies_priv’ entry ‘@% root@mysql.ocp.com’ ignored in –skip-name-resolve mode.
解决办法:
delete from mysql.proxies_priv where host=’db01.mysql.com’;commit;flush privileges;
delete from mysql.proxies_priv where host=’db02.mysql.com’;commit;flush privileges;
delete from mysql.proxies_priv where host=’db03.mysql.com’;commit;flush privileges;
—–7.9 软连接mysql的bin目录
ln -sf /data/mysql/bin/* /usr/bin/
3.galera相关配置
—–3.1 galera安装(参见galera安装配置)
—3.2 新建wsrep用户
GRANT RELOAD, LOCK TABLES, REPLICATION CLIENT ON . TO ‘wsrep’@’%’ IDENTIFIED BY ‘wsrep’ ;flush privileges;
CREATE USER ‘wsrep’@’localhost’ IDENTIFIED BY ‘wsrep’;
GRANT RELOAD, LOCK TABLES, REPLICATION CLIENT ON . TO ‘wsrep’@’localhost’;
FLUSH PRIVILEGES;
—3.2.3 安装socat
http://www.dest-unreach.org/socat/
http://www.dest-unreach.org/socat/download/
tar xf socat-1.7.3.0.tar.gz
cd socat-1.7.3.0
./configure
make -j4
make install
—3.2.4 修改mysql的配置文件
mkdir /etc/my.cnf.d
cd /soft/mariadb-10.0.20/support-files
cp wsrep.cnf /etc/my.cnf.d/
vi /etc/my.cnf.d/wsrep.cnf
node01
[mysqld]
wsrep_on=ON
binlog_format=ROW
default-storage-engine=innodb
为了降低冲突
innodb_autoinc_lock_mode=2
innodb_locks_unsafe_for_binlog=1
innodb_flush_log_at_trx_commit = 2 #可以提高性能，galera保证不丢数据
query_cache_size=0
query_cache_type=0
wsrep_provider=/data/mysql/lib/plugin/libgalera_smm.so #修改
wsrep_cluster_name=”galera_cluster” #修改
wsrep_cluster_address=”gcomm://192.168.50.10,192.168.50.20,192.168.50.30” #修改
wsrep_node_address=192.168.50.10 #修改
wsrep_node_name=db01 #修改
wsrep_slave_threads=4
wsrep_certify_nonPK=1
wsrep_max_ws_rows=131072
wsrep_max_ws_size=1073741824
wsrep_debug=0
wsrep_convert_LOCK_to_trx=0
wsrep_retry_autocommit=1
wsrep_auto_increment_control=1
wsrep_drupal_282555_workaround=0
wsrep_causal_reads=0
wsrep_notify_cmd=
wsrep_sst_method=xtrabackup-v2 #可以修改#rsync,xtrabackup,mysqldump
wsrep_sst_auth=root:pass01 #修改
node02
[mysqld]
wsrep_on=ON
binlog_format=ROW
default-storage-engine=innodb
为了降低冲突
innodb_autoinc_lock_mode=2
innodb_flush_log_at_trx_commit = 2 #可以提高性能，galera保证不丢数据
query_cache_size=0
query_cache_type=0
wsrep_provider=/data/mysql/lib/plugin/libgalera_smm.so #修改
wsrep_cluster_name=”galera_cluster” #修改
wsrep_cluster_address=”gcomm://192.168.50.10,192.168.50.20,192.168.50.30” #修改
wsrep_node_address=192.168.50.20 #修改
wsrep_node_name=db02 #修改
wsrep_slave_threads=4
wsrep_certify_nonPK=1
wsrep_max_ws_rows=131072
wsrep_max_ws_size=1073741824
wsrep_debug=0
wsrep_convert_LOCK_to_trx=0
wsrep_retry_autocommit=1
wsrep_auto_increment_control=1
wsrep_drupal_282555_workaround=0
wsrep_causal_reads=0
wsrep_notify_cmd=
wsrep_sst_method=xtrabackup-v2 #可以修改#rsync,xtrabackup,mysqldump,xtrabackup-v2
wsrep_sst_auth=root:pass01 #修改
node03
[mysqld]
wsrep_on=ON
binlog_format=ROW
default-storage-engine=innodb
为了降低冲突
innodb_autoinc_lock_mode=2
innodb_locks_unsafe_for_binlog=1
innodb_flush_log_at_trx_commit = 2 #可以提高性能，galera保证不丢数据
query_cache_size=0
query_cache_type=0
wsrep_provider=/data/mysql/lib/plugin/libgalera_smm.so #修改
wsrep_cluster_name=”galera_cluster” #修改
wsrep_cluster_address=”gcomm://192.168.50.10,192.168.50.20,192.168.50.30” #修改
wsrep_node_address=192.168.50.30 #修改
wsrep_node_name=db03 #修改
wsrep_slave_threads=4
wsrep_certify_nonPK=1
wsrep_max_ws_rows=131072
wsrep_max_ws_size=1073741824
wsrep_debug=0
wsrep_convert_LOCK_to_trx=0
wsrep_retry_autocommit=1
wsrep_auto_increment_control=1
wsrep_drupal_282555_workaround=0
wsrep_causal_reads=0
wsrep_notify_cmd=
wsrep_sst_method=xtrabackup-v2 #可以修改#rsync,xtrabackup,mysqldump,xtrabackup-v2
wsrep_sst_auth=root:pass01 #修改
echo ‘!includedir /etc/my.cnf.d/’ >>/etc/my.cnf
—4.使用rsync、xtrabackup、mydupm
–4.1 使用rsync
yum -y install rsync
tar xvzf socat-2.0.0-b8.tar.gz
cd socat-2.0.0-b8
./configure
make & make install
–强烈建议将xtrabackup和socat加入path
vi /etc/profile
PATH=/data/mysql/bin:/usr/local/bin/socat:$PATH
export PATH
ln -sf /usr/local/bin/socat /usr/sbin/
—–4.2 使用xtrabackup(推荐)
tar xf Percona-XtraBackup-2.2.11-r7956d1d-el6-x86_64-bundle.tar
yum localinstall -y percona-*
—5.初始化启动
–方法1:
修改 my.cnf 并设置 wsrep_cluster_address=gcomm:// ，启动后再来修改配置.
–方法2:(推荐)
使用下面这个命令来启动 mysql (支持 RedHat 和 CentOS 系统)
第一个节点启动和其他的两个节点有些不同
/data/mysql/bin/mysqld_safe –datadir=’/data/mysql/data’ –wsrep-cluster-address=”gcomm://” &
其它节点启动:
/data/mysql/bin/mysqld_safe –datadir=’/data/mysql/data’ &
–node1查看日志
cat /data/mysql/data/innobackup.backup.log
—-6.各节点启动相关
netstat -lntp | grep 33306
tcp 0 0 :::33306 :::* LISTEN 3072/mysqld
pkill mysqld
NODE1先启动,其它节点无顺序.
—-7.查看群集连接情况
SELECT VARIABLE_VALUE as “cluster size” FROM INFORMATION_SCHEMA.GLOBAL_STATUS WHERE VARIABLE_NAME=”wsrep_cluster_size”;
SHOW STATUS LIKE ‘wsrep_cluster_size’;
SHOW STATUS LIKE ‘wsrep%’;
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