一:试验目的
利用heartbeat心跳机制haresource实现高可用(HA)mysql数据库的搭建。
二:试验拓扑图
三:安装前的环境准备
规划IP为192.168.1.14为node1;IP为192.168.1.2为node2
1)修改各主机名称
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| 修改node1主机名称
vim /etc/sysconfig/network
NETWORKING=yes
HOSTNAME=node1 #修改主机名称为node1
vim /etc/hosts
192.168.1.2 node2
192.168.1.14 node1
修改node2的主机名称
vim /etc/sysconfig/network
NETWORKING=yes
HOSTNAME=node2 #修改主机名称为node2
vim /etc/hosts
192.168.1.2 node2 #添加解析地址
192.168.1.14 node1
添加完后测试可以ping的通
[iyunv@node2 ~]# ping node1
PING node1 (192.168.1.14) 56(84) bytes of data.
64 bytes from node1 (192.168.1.14): icmp_seq=1 ttl=64 time=7.64 ms
64 bytes from node1 (192.168.1.14): icmp_seq=2 ttl=64 time=0.731 ms
64 bytes from node1 (192.168.1.14): icmp_seq=3 ttl=64 time=0.533 ms
64 bytes from node1 (192.168.1.14): icmp_seq=4 ttl=64 time=0.501 ms
[iyunv@node2 ~]# ping node2
PING node2 (192.168.1.2) 56(84) bytes of data.
64 bytes from node2 (192.168.1.2): icmp_seq=1 ttl=64 time=4.79 ms
64 bytes from node2 (192.168.1.2): icmp_seq=2 ttl=64 time=0.154 ms
64 bytes from node2 (192.168.1.2): icmp_seq=3 ttl=64 time=0.123 ms
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2)各节点之间ssh互信
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| node1:
ssh-keygen -t rsa -f ~/.ssh/id_rsa -P ''
ssh-copy-id -i .ssh/id_rsa.pub root@node2
node2:
ssh-keygen -t rsa -f ~/.ssh/id_rsa -P ''
ssh-copy-id -i .ssh/id_rsa.pub root@node1
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3) 进行时间同步(node1和node2都要同步) 1
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| ntpdate 172.16.0.1 #后面的IP地址就是你所搭建的时间服务器IP地址
[iyunv@node1 ~]# ssh node2 'date';date
Wed Sep 10 17:44:44 CST 2014
Wed Sep 10 17:44:44 CST 2014 #时间要保持一致
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四:安装与配置heartbeat
所要安装heartbeat包文件 http://down./data/1872114
1)安装heartbeat包文件(在centos6.5上安装包文件)
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| 首先解决依赖关系
yum install -y perl-TimeDate PyXML libnet net-snmp-libs
用rpm安装方式依次安装(因为在centos6.5上用yum安装时会出现更新安装的情况所以用rpm安装)
rpm -ivh heartbeat-pils-2.1.4-12.el6.x86_64.rpm
rpm -ivh heartbeat-stonith-2.1.4-12.el6.x86_64.rpm
rpm -ivh heartbeat-2.1.4-12.el6.x86_64.rpm
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2)配置heartbeat
说明:默认安装好heartbeat没有配置文件,但是样例文件 有可以复制古来使用
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| cd /usr/share/doc/heartbeat-2.1.4/
cp cp ha.cf authkeys haresources /etc/ha.d
vim ha.cf #配置ha.cf文件
logfile /var/log/ha-log #启用logfile
mcast eth0 225.16.16.16 694 1 0 #配置广播地址
auto_failback on #主节点,当主节点恢复后立即把资源抢夺回来
node node2
node node1 #两个节点
ping 172.16.0.1 #当只有偶数节点时,这是个仲裁机构
vim haresources
node1 172.16.16.3/16/eth0:0/172.16.255.255 mysqld #添加资源
vim authkeys
auth 2
2 sha1 1234567123 #这里可以添加随机数
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3)复制以上三个配置文件到node2上
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| scp authkeys ha.cf haresources node2:/etc/ha.d/
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4)启动节点
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| [iyunv@node1 ha.d]# service heartbeat start
Starting High-Availability services:
2014/09/10_17:03:18 INFO: Resource is stopped
Done.
[iyunv@node1 ha.d]# ssh node2 'service heartbeat start'
Starting High-Availability services:
2014/09/10_17:04:26 INFO: Resource is stopped
Done.
检查node1端口是否在监听状态
[iyunv@node1 ha.d]# ss -nul
State Recv-Q Send-Q Local Address:Port Peer Address:Port
UNCONN 0 0 *:111 *:*
UNCONN 0 0 *:631 *:*
UNCONN 0 0 *:647 *:*
UNCONN 0 0 *:942 *:*
UNCONN 0 0 225.16.16.16:694 *:* #监听状态
UNCONN 0 0 *:839 *:*
UNCONN 0 0 *:50761 *:*
UNCONN 0 0 *:847 *:*
UNCONN 0 0 *:46824 *:*
UNCONN 0 0 :::111 :::*
UNCONN 0 0 :::839 :::*
UNCONN 0 0 :::36945 :::*
检查node2端口是否在监听状态
[iyunv@node2 ~]# ss -unl
State Recv-Q Send-Q Local Address:Port Peer Address:Port
UNCONN 0 0 *:111 *:*
UNCONN 0 0 *:631 *:*
UNCONN 0 0 *:47496 *:*
UNCONN 0 0 *:664 *:*
UNCONN 0 0 225.16.16.16:694 *:* #监听状态
UNCONN 0 0 *:52941 *:*
UNCONN 0 0 *:725 *:*
UNCONN 0 0 :::111 :::*
UNCONN 0 0 :::664 :::*
UNCONN 0 0 :::39515 :::*
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五:配置NFS服务
1)在NFS文件服务器上创建服务文件
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| pvcreate /dev/sdb #创建物理卷
vgcreate myvg /dev/sdb #创建卷组
lvcreate -L 10G -n mydata myvg #创建逻辑卷
mke2fs -j /dev/myvg/mydata #格式化逻辑卷
lvs #查看逻辑卷
mkdir /mydata #创建挂载目录
mount /dev/myvg/mydata /mydata/ #挂载
cd /mydata/ #进入挂载目录
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2)在node1和node2上创建data目录给予mysql用户和mysql组。
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| mkdir data
chown -R mysql:mysql data
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3)修改nfs配置文件
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| [iyunv@localhost ~]# vim /etc/exports
/mydata 192.168.1.2(no_root_squash,rw,no_all_squash) 192.168.1.14(no_root_squash,r
w,no_all_squash)
[iyunv@localhost ~]# service nfs start #启动NFS
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4)挂在nfs
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| mount -t nfs 192.168.1.16:/mydata /data
[iyunv@node2 ~]# mount #查看挂在情况
/dev/mapper/vg0-root on / type ext4 (rw)
proc on /proc type proc (rw)
sysfs on /sys type sysfs (rw)
devpts on /dev/pts type devpts (rw,gid=5,mode=620)
tmpfs on /dev/shm type tmpfs (rw)
/dev/sda1 on /boot type ext4 (rw)
/dev/mapper/vg0-usr on /usr type ext4 (rw)
/dev/mapper/vg0-var on /var type ext4 (rw)
none on /proc/sys/fs/binfmt_misc type binfmt_misc (rw)
sunrpc on /var/lib/nfs/rpc_pipefs type rpc_pipefs (rw)
192.168.1.16:/mydata on /data type nfs (rw,vers=4,addr=192.168.1.16,clientaddr=192.168.1.2)
node1 操作如上
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5)二进制安装mysql 因为这里用到是NFS文件系统要对挂在的磁盘进行初始化,和修改mysql的配置文件
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| vim /etc/my.cnf
[mysqld]
port = 3306
socket = /tmp/mysql.sock
skip-external-locking
key_buffer_size = 256M
max_allowed_packet = 1M
table_open_cache = 256
sort_buffer_size = 1M
read_buffer_size = 1M
read_rnd_buffer_size = 4M
myisam_sort_buffer_size = 64M
thread_cache_size = 8
query_cache_size= 16M
# Try number of CPU's*2 for thread_concurrency
thread_concurrency = 4
datadir = /data #改为挂载的所在磁盘
innodb_file_per_table = 1 #innodb表单独表空间
[iyunv@node1 ~]# /usr/local/mysql/scripts/mysql_install_db --basedir=/usr/local/mysql --da
tadir=/data --user=mysql # 进行磁盘初始化
启动mysql
[iyunv@node1 mysql]# service mysqld start
Starting MySQL... [ OK ]
测试能否登录mysql
[iyunv@node1 ha.d]# mysql
Welcome to the MariaDB monitor. Commands end with ; or g.
Your MariaDB connection id is 1
Server version: 5.5.32-MariaDB-log MariaDB Server
Copyright (c) 2000, 2013, Oracle, Monty Program Ab and others.
Type 'help;' or 'h' for help. Type 'c' to clear the current input statement.
MariaDB [(none)]> show databases
-> ;
+--------------------+
| Database |
+--------------------+
| information_schema |
| mysql |
| performance_schema |
| test |
+--------------------+
4 rows in set (0.06 sec)
MariaDB [(none)]>
配置node2的mysql (把启动脚本和主配置文件发给node2)
[iyunv@node1 ~]# scp /etc/my.cnf node2:/etc/
my.cnf 100% 4721 4.6KB/s 00:00
[iyunv@node1 ~]# scp /etc/init.d/mysqld node2:/etc/init.d/
mysqld 100% 11KB 10.6KB/s 00:00
测试node2能否启动
[iyunv@node2 ~]# mysql
Welcome to the MySQL monitor. Commands end with ; or g.
Your MySQL connection id is 1
Server version: 5.5.32-MariaDB-log MariaDB Server
Copyright (c) 2000, 2013, Oracle and/or its affiliates. All rights reserved.
Oracle is a registered trademark of Oracle Corporation and/or its
affiliates. Other names may be trademarks of their respective
owners.
Type 'help;' or 'h' for help. Type 'c' to clear the current input statement.
mysql>
mysql> show databases;
+--------------------+
| Database |
+--------------------+
| information_schema |
| mysql |
| performance_schema |
| test |
+--------------------+
4 rows in set (0.04 sec)
mysql>
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OK 我们的Heartbeat+MySQL+NFS 实现高可用(HA)的MySQL集群基于heartbeat 的haresources配置完毕。
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