heartbeat安装配置及httpd高可用简单示例

注意事项:

    1、节点名称:hostname、/etc/hosts

    2、ssh互信

    3、节点时间同步


heartbeat的三个配置文件:

    authkeys:通信密钥文件

    ha.cf:heartbeat服务配置文件

    haresources:资源管理配置文件


安装配置(系统为CentOS6.5):

WAN IP:192.168.101.168

node1:192.168.101.21

node2:192.168.101.22


1、配置node1、node2节点名称、ssh互信、时间同步

node1:

# hostname node1.redhat.com


# vim /etc/sysconfig/network

HOSTNAME=node1.redhat.com


# vim /etc/hosts

192.168.101.21  node1.redhat.com node1

192.168.101.22  node2.redhat.com node2


# ssh-keygen -t rsa

# ssh-copy-id -i ~/.ssh/id_rsa.pub node2


# ntpdate 0.centos.pool.ntp.org


node2:

# hostname node2.redhat.com


# vim /etc/sysconfig/network

HOSTNAME=node2.redhat.com


# vim /etc/hosts

192.168.101.21  node1.redhat.com node1

192.168.101.22  node2.redhat.com node2


# ssh-keygen -t rsa

# ssh-copy-id -i ~/.ssh/id_rsa.pub node1


# ntpdate 0.centos.pool.ntp.org


2、node1、node2安装heartbeat

# 注意:这里使用CentOS本地iso yum源+EPEL源安装。

# yum install http://mirrors.zju.edu.cn/epel/6/i386/epel-release-6-8.noarch.rpm

# yum install heartbeat cluster-glue resource-agents pacemaker httpd


3、node1配置heartbeat

# 拷贝配置文件至/etc/ha.d/

# cp -p /usr/share/doc/heartbeat-3.0.4/{ha.cf,authkeys,haresources} /etc/ha.d/


# 配置生成通信密钥

# openssl rand -base64 20

tRlI5Dr/YHoE59kJ4yYOgNpVmDI=


# vim /etc/ha.d/authkeys

auth 1

1 md5 tRlI5Dr/YHoE59kJ4yYOgNpVmDI=

# chmod 600 /etc/ha.d/authkeys


# 配置heartbeat主配置文件

# vim /etc/ha.d/ha.cf

logfile/var/log/ha-log                      # 日志文件路径

keepalive 1                                        # 心跳信息传递间隔时间,这里设置1秒

deadtime 30                                      # 节点超时时间,超过30s没有收到心跳信息则认为节点死亡

warntime 10                                       # 告警时间

initdead 120                                       # heartbeat首次启动等待时间,默认120秒,此时间设置为deadtime的两倍

udpport        694                                # 心跳信息传递所使用的端口

mcast eth0 225.1.1.1 694 1 0             # 采用组播地址

auto_failback off                                # 是否开启故障恢复

nodenode1.redhat.com                    # 主节点名称,必须与uname -n一致

nodenode2.redhat.com                    # 备用节点名称

ping 192.168.101.254                         # 通过ping网关来检测心跳信息是否正常


# 配置资源管理文件,绑定外网IP:192.168.101.168

# vim /etc/ha.d/haresources

node1.redhat.com IPaddr::192.168.101.168/24/eth0/ httpd


4、复制配置文件至node2

# scp -p /etc/ha.d/{ha.cf,authkeys,haresources} node2:/etc/ha.d/


5、创建httpd index.html页面并关闭开机自启动httpd

# echo "<h1>node1.redhat.com</h1>" > /var/www/html/index.html

# ssh node2 'echo "<h1>node2.redhat.com</h1>" > /var/www/html/index.html'


# chkconfig httpd off

# ssh node2 'chkconfig httpd off'


6、启动heartbeat

# 链接heartbeat各类脚本

# ln -s /usr/share/heartbeat/* /usr/lib64/heartbeat/

# /etc/init.d/heartbeat start

# ssh node2 '/etc/init.d/heartbeat start'


7、查看日志、绑定IP及浏览器访问

# tail /var/log/ha-log

# ifconfig

http://192.168.101.168/


8、使用NFS共享存储

# NFS主机IP为:192.168.101.28

# NFS共享目录:/data/www/

# vim /data/www/index.html

NFS Server.


# 停止heartbeat

# ssh node2 '/etc/init.d/heartbeat stop'

# /etc/init.d/heartbeat stop


# node1修改资源配置文件并复制到node2

# vim /etc/ha.d/haresources

node1.redhat.com IPaddr::192.168.101.168/24/eth0/ Filesystem::192.168.101.28:/data/www::/var/www/html::nfs httpd

# scp /etc/ha.d/haresources node2:/etc/ha.d/


9、启动heartbeat

# /etc/init.d/heartbeat start

# ssh node2 '/etc/init.d/heartbeat start'


10、查看日志、绑定IP及浏览器访问

# tail /var/log/ha-log

# ifconfig

http://192.168.101.168/


11、节点切换测试

# /usr/share/heartbeat/hb_standby


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