双向心跳线

Posted 2020-08-09 ZhengLiming

双向心跳线

心跳线就是两台服务器之间再搭一个内网进行通信,保障主线断了，两台服务器还能通过内网线路通信。双心条线就在内网内某一个节点出现问题而其他节点不知道的时候就会通过另一条心跳线发出警告并将该节点提掉。

现在搭建怎么创建2个心跳线，这里准备多台PC：[[email protected] ~] 为真机
[[email protected] ~]、[[email protected] ~]、[[email protected] ~]为3个节点
首先我们安装一个集群pcs包。
[[email protected] ~]# yum -y install pcs ;systemctl stop firewalld.service ;systemctl disable firewalld.service ;systemctl restart pcsd ;systemctl enable pcsd ; echo redhat |passwd --stdin hacluster *****nodea、nodeb、nodec都需要这样装

将nodea、nodeb、nodec授权给pcs并指定在hacluster用户下
[[email protected] ~]# pcs cluster auth nodea.cluster0.example.com nodeb.cluster0.example.com nodec.cluster0.example.com
Username: hacluster
Password:
nodea.cluster0.example.com: Authorized
nodeb.cluster0.example.com: Authorized
nodec.cluster0.example.com: Authorized

在真实机输入下面网站访问集群
[[email protected] ~]# firefox https://nodea.cluster0.example.com:2224

1.png

1、添加
2、集群名：cluster-1
3-5、将nodea、nodeb、noddec主机名加入其中

点击进入集群cluster-1

2.png

用下面命令查看当前心跳线的个数及IP地址
[[email protected] corosync]# corosync-cfgtool -s
Printing ring status.
Local node ID 1
RING ID 0
id = 172.25.0.10
status = ring 0 active with no faults

进入到/etc/corosync/会发现当前有几个配置文件
[[email protected] ~]# cd /etc/corosync/
[[email protected] corosync]# ls
corosync.conf corosync.conf.example.udpu uidgid.d
corosync.conf.example corosync.xml.example

首先我们需要将corosync.conf.example内的内容当模版
[[email protected] corosync]# vim corosync.conf.example

3.png

1、将多余的文字去掉留下当前黑色范围内的内容复制

[[email protected] corosync]# vim corosync.conf

4.png

1、增加一个active模式
2、心跳模版指定的IP地址为172.25.0.0网段
3、心跳模版指定的IP地址为192.168.0.0网段
*****由于真机和节点内的网卡IP都属于这2个网段

上面的配置文件做完后
[[email protected] corosync]# pcs cluster stop --all
nodea.cluster0.example.com: Stopping Cluster (pacemaker)...
nodeb.cluster0.example.com: Stopping Cluster (pacemaker)...
nodec.cluster0.example.com: Stopping Cluster (pacemaker)...
nodeb.cluster0.example.com: Stopping Cluster (corosync)...
nodec.cluster0.example.com: Stopping Cluster (corosync)...
nodea.cluster0.example.com: Stopping Cluster (corosync)...
[[email protected] corosync]# pcs cluster sync
nodea.cluster0.example.com: Succeeded
nodeb.cluster0.example.com: Succeeded
nodec.cluster0.example.com: Succeeded
[[email protected] corosync]# pcs cluster start --all
nodeb.cluster0.example.com: Starting Cluster...
nodec.cluster0.example.com: Starting Cluster...
nodea.cluster0.example.com: Starting Cluster...

先关掉集群使集群同步，后开启集群就可以看到有2个心跳线了
[[email protected] corosync]# corosync-cfgtool -s
Printing ring status.
Local node ID 1
RING ID 0
id = 172.25.0.10
status = ring 0 active with no faults
RING ID 1
id = 192.168.0.10
status = ring 1 active with no faults