High availability LAMP via HeartBeat 2.x

One, test environment

< td width="159" valign="top">192.168.86.185

Two, configure the time synchronization of the three servers and modify the crontab to automatically synchronize with the ntp server

crontab -e

*/2 * * * * /usr/sbin/ntpdate cn.pool.ntp.org

Three, edit the /etc/hosts file to configure ssh mutual trust

1.vim /etc/hosts

192.168.86.185 node1.example.com node1192.168.86.186 node2.example.com node2192.168.86.111 fs. example.com fs

scp/etc/host s 192.168.86.186:/etc/scp /etc/hosts 192.168.86.111:/etc/

2. Configure ssh certificate

Run ssh-keygen on each server –> ssh-copyid node2

Four, prepare NFS Server

1. Add a new disk partition and mount it

fdisk /dev/sdbmkfs.ext4 /dev/sdb1mkdir /mydata; mount /dev/sdb1/mydata

2. Edit the /etc/exports file

vim /etc/ exports

/mydata 192.168.86.0/24(rw,no_root_squash)

Start nfs service

service nfs start

Create the /mydata directory on node1 and node2, and mount it as a test

mkdir /mydata; mount-t nfs fs:/mydata/mydata; mkdir/mydata/{db,webdoc}

Five, install heartbeat+crm+httpd+mariadb on node1 and node2< /p>

Heartbeat-gui-2.1.4-12.el6.x86_64.rpm heartbeat-stonith-2.1.4-12.el6.x86_64.rpm heartbeat-2.1.4-12.el6. x86_64.rpm Heartbeat-stonith-2.1.4-12.el6.x86_64.rpm to install

It is recommended to use yum localinstall to solve the dependencies, or you can use yum install heartbeat to install and then yum remove After heartbeat resolves the dependencies, install rpm -ivh

httpd uses yum Installation

yum install httpd php php-mysql -y

mariadb is installed using a compiled tarball

tar xvf mariadb-5.5.46-linux-x86_64.tar.gz -C/usr/local; ln-s/usr/local/mariadb-5.5.46/mysql

1.mysql configuration

groupadd -r -g mysqluseradd -r -g mysql mysqlchown -R root.mysql /usr/local/mysql< /pre> 
copy mysql configuration file
 
cp /usr/local/mysql/support-fils/my-medium.cnf /etc/my. cnf
Edit configuration file
vim /etc/my.cnf
datadir = /mydata/db Specify database location
innodb_file_per_table = on Specify the storage method of innodb table space
skip_name_resolve = on Skip domain name resolution
copy startup script
cp /usr/local/mysql/mysql.server /etc/init.d/mysqld; chmod +x /etc/init.d/mysqld
Initialize the database
 < pre class="brush:bash;toolbar:false">/usr/local/mysql/scripts/mysql_install_db--basedir=/usr/local/mysql--user=mysql 
Test start mysql 
service mysqld start
Create wordpress library and authorize wordpress users
MariaDB [(none)]> create database wordpress;Query OK, 1 row affected (0.01 sec) MariaDB [(none)]> grant all privileges on wordpress.* to'wordpress'@'192.168.86.%' identified by'wordpress ';Query OK, 0 rows affected (0.01 sec) MariaDB [(none)]> flush privileges; Query OK, 0 rows affected (0.01 sec)
Close mysql after normal startup
service mysqld stop
2.httpd configuration
Edit httpd configuration file
vim /etc/httpd/conf/httpd.conf
DocumentRoot"/mydata/webdoc"
Six, configure heartbeat
cp/ usr/share/doc/heartbeat-2.1.4/{authkeys,ha.cf} /etc/ha.d/
1. Edit authkeys
First you need to generate a random number Make the most matching pair
openssl rand-base64 10ABB7qPDGZVXdRAvim/etc/ha.d/authkeysauth 2#1crc2sha1ABB7qPDGZVXdRA
Modify to Random number generated
#3 md5 Hello!
Copy authkeys to node 2
scp /etc/ha.d/authkeys node2:/etc/ha.d
2. Edit ha.cf< /p> 
vim /etc/ha.d/ha.cf
logfile /var/log/ha-log Enable log function
logfacility local0 
udpport 694 monitor udp 694 port
mcast eth0 225.0. 0.1 694 1 0 Configure the multicast address, the ttl value
auto_failback on After the repair, the automatic switchback function is turned on
node node1.example.com Define two nodes separately
 < p>node node2.example.com
ping 192.168.86.2 pingnode device
crm on open heartbeat 2.x crm
copy ha.cf to node2 
scp /etc/ha.d/ha.cf node2:/etc/ha.d/
Modify hacluster password

echo linuxha|passwdhacluster--stdin
Seven, configure cluster resources
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Add VIP
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Test resource migration
Stop heartbeat on node2
service heartbeat stop
Visit the page again to test whether it is normal 

								

									
									 2.x, available, By, Heartbeat, high, Implementation, LAMP