heartbeat v1版CRM的高可用web集群的实现

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实验环境规划:


实验环境:

CentOS release 6.6(Final)  三台

IP地址:

Node1: eth0172.16.31.10/16

Node2:  eth0172.16.31.11/16

Client: eth0172.16.31.12/16



技术分享

集群架构图 :

技术分享



 

一.heartbeat特性介绍:

1.实现底层心跳传递

2.启动关闭集群服务

3.工作节点多达16个节点,由一个主节点和其他备节点组成

对称和非对称节点

4.启动时心跳信息由主节点发送

基于UDP的单播(Unicast),UDP的广播(Broadcast),UDP的多播(Multicast),串行线路通信的传播(serial cable)

 

 

二.配置HA集群的前提:

1、节点之间时间必须同步;

建议使用ntp协议进行;

2、节点之间必须要通过主机名互相通信;

建议使用hosts文件;

通信中使用的名字必须与其节点为上“uname -n”命令展示出的名字保持一致;

3、如果是2个节点,需要仲裁设备;

4、节点之间彼此root用户能基于ssh密钥方式进行通信;

                  

注意:定义为集群服务中的任意资源都不能开机自动启动,因为它们将由CRM启动;

                  

三.资源准备:

1、选定vip;

2、httpd:

安装好程序;

配置好httpd,本地测试完成;

关闭服务,并确保开机不会自动启动;

3、shared storage:NFS

 

四.节点系统HA的前提条件配置

1.时间同步

参考我的博客:http://sohudrgon.blog.51cto.com/3088108/1598314

 

2.主机名同步

[[email protected] ~]# cat /etc/hosts

127.0.0.1  localhost localhost.localdomain localhost4 localhost4.localdomain4

::1        localhost localhost.localdomain localhost6 localhost6.localdomain6

172.16.0.1 server.magelinux.com server

172.16.31.10 node1.stu31.com node1

172.16.31.11 node2.stu31.com node2

 

3.仲裁设备为网关172.16.0.1

 

4.ssh无密钥通信

node1

[[email protected] ~]# ssh-keygen -t rsa -P""

[[email protected] ~]# ssh-copy-id -i.ssh/id_rsa.pub [email protected]

测试将node1的hosts文件复制到node2:

[[email protected] ~]# scp /etc/hosts [email protected]:/etc/hosts

hosts                                        100%  268     0.3KB/s  00:00

 

node2

[[email protected] ~]# ssh-keygen -t rsa -P""

[[email protected] ~]# ssh-copy-id -i .ssh/id_rsa.pub  [email protected]

 

测试无密钥通信结果:

[[email protected] ~]# date ;ssh node2 ‘date‘

Thu Jan 1 20:44:09 CST 2015

Thu Jan 1 20:44:09 CST 2015

保证时间一致!

 

五.安装heartbeat程序

1.安装heartbeat程序包组

获取程序包组:

[[email protected] heartbeat2]# ls

heartbeat-2.1.4-12.el6.x86_64.rpm

heartbeat-gui-2.1.4-12.el6.x86_64.rpm

heartbeat-ldirectord-2.1.4-12.el6.x86_64.rpm

heartbeat-pils-2.1.4-12.el6.x86_64.rpm

heartbeat-stonith-2.1.4-12.el6.x86_64.rpm

 

安装程序包组:

node1和node2都需要安装;

前提条件需要安装如下依赖包:

[[email protected] heartbeat2]# yum install -y net-snmp-libs libnet PyXML


安装heartbeat套件程序:

[[email protected] heartbeat2]# rpm -ivh heartbeat-2.1.4-12.el6.x86_64.rpm heartbeat-stonith-2.1.4-12.el6.x86_64.rpm heartbeat-pils-2.1.4-12.el6.x86_64.rpm heartbeat-gui-2.1.4-12.el6.x86_64.rpm

Preparing...               ########################################### [100%]

  1:heartbeat-pils        ########################################### [ 25%]

  2:heartbeat-stonith     ########################################### [ 50%]

  3:heartbeat             ########################################### [ 75%]

  4:heartbeat-gui         ########################################### [100%]

 

2.复制配置文件到/etc/ha.d目录下:

[[email protected] heartbeat2]# cd /usr/share/doc/heartbeat-2.1.4/

[[email protected] heartbeat-2.1.4]# cp ha.cf authkeys haresources /etc/ha.d/

 

3.配置rsyslog记录heartbeat的日志

[[email protected] ~]# vim /etc/rsyslog.conf

local0.*                                               /var/log/heartbeat.log

拷贝一份到node2:

[[email protected] ~]# scp /etc/rsyslog.conf [email protected]:/etc/rsyslog.conf

rsyslog.conf                                  100%3203     3.1KB/s  00:00

 

4.配置ha.cf主配置文件:

[[email protected] ~]# cat /etc/ha.d/ha.cf |grep-v ^#

#日志记录

logfacility     local0

#组播配置

mcast eth0 225.131.31.23 694 1 0

auto_failback on

#集群节点

node   node1.stu31.com

node   node2.stu31.com

#仲裁设备

ping 172.16.0.1

#是否开启heartbeat v2 版本的CRM,我们使用v1版本的CRM来测试,注释掉。

#crm on

 

5.定义域共享密钥,认证文件权限必须是600或者400

[[email protected] ~]# openssl rand -hex 6

72907725aaf0

[[email protected] ~]# vim /etc/ha.d/authkeys

auth   2

2      sha1    72907725aaf0

 

6.配置集群资源

[[email protected] ~]# vim /etc/ha.d/haresources

node1.stu31.com  172.16.31.180/24/eth0/172.16.31.255 httpd

 

将三个配置文件复制一份拷贝到node2:

[[email protected] ha.d]# scp -p authkeys ha.cf haresources node2:/etc/ha.d/

authkeys                                      100%  684    0.7KB/s   00:00   

ha.cf                                         100%   10KB 10.4KB/s   00:00   

haresources                                   100%5964     5.8KB/s   00:00

 

7.确定httpd服务正常

[[email protected] ~]# echo"node2.stu31.com" > /var/www/html/index.html

[[email protected] ~]# echo"node1.stu31.com" > /var/www/html/index.html


启动httpd服务进行测试

[[email protected] ha.d]# service httpd start

Starting httpd:                                           [  OK  ]

[[email protected] ~]# service httpd start

Starting httpd:                                           [  OK  ]

 

访问测试:

[[email protected] ha.d]# curl http://172.16.31.10

node1.stu31.com

[[email protected] ha.d]# curl http://172.16.31.11

node2.stu31.com

 

完成后将服务自启动关闭,及停止httpd服务:

node1:

[[email protected] ha.d]# service httpd stop

Stopping httpd:                                           [  OK  ]

[[email protected] ha.d]# chkconfig httpd off

node2:

[[email protected] ~]# service httpd stop

Stopping httpd:                                           [  OK  ]

[[email protected] ~]# chkconfig httpd off

 

 

六.启动heartbeat集群

1.启动heartbeat服务:

[[email protected] ha.d]# service heartbeat start; ssh node2 ‘service heartbeat start‘

logd is already running

Starting High-Availability services:

2015/01/01_21:10:33 INFO:  Resource is stopped

Done.

  

logd is already running

Starting High-Availability services:

2015/01/01_21:10:33 INFO:  Resource is stopped

Done.

 

2.访问测试:

[[email protected] ~]# curl http://172.16.31.180

node1.stu31.com

 

我们关闭node1,在进行测试:

[[email protected] ha.d]# service heartbeat stop

Stopping High-Availability services:

Done.


ip地址切换到了node2:

[[email protected] ~]# ip addr show

1: lo: <LOOPBACK,UP,LOWER_UP> mtu65536 qdisc noqueue state UNKNOWN

   link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00

   inet 127.0.0.1/8 scope host lo

   inet6 ::1/128 scope host

      valid_lft forever preferred_lft forever

2: eth0: <BROADCAST,MULTICAST,UP,LOWER_UP>mtu 1500 qdisc pfifo_fast state UP qlen 1000

   link/ether 08:00:27:58:d3:3e brd ff:ff:ff:ff:ff:ff

   inet 172.16.31.11/16 brd 172.16.255.255 scope global eth0

   inet 172.16.31.180/24 brd 172.16.31.255 scope global eth0:0

   inet6 fe80::a00:27ff:fe58:d33e/64 scope link

      valid_lft forever preferred_lft forever

 

访问测试:

[[email protected] ~]# curl http://172.16.31.180

node2.stu31.com

 

测试成功!



本文出自 “眼眸刻着你的微笑” 博客,请务必保留此出处http://dengaosky.blog.51cto.com/9215128/1964550

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