集群

集群
安装软件
1.都把yum源改成：
# repos on instructor for classroom use
# Main rhel6.5 server
[base]
name=Instructor Server Repository
baseurl=ftp://172.25.99.250/pub/
gpgcheck=1
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-redhat-release
# HighAvailability rhel6.5
[HighAvailability]
name=Instructor HighAvailability Repository
baseurl=ftp://172.25.99.250/pub/HighAvailability
gpgcheck=1
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-redhat-release
# LoadBalancer packages
[LoadBalancer]
name=Instructor LoadBalancer Repository
baseurl=ftp://172.25.99.250/pub/LoadBalancer
gpgcheck=1
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-redhat-release
# ResilientStorage
[ResilientStorage]
name=Instructor ResilientStorage Repository
baseurl=ftp://172.25.99.250/pub/ResilientStorage
gpgcheck=1
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-redhat-release
# ScalableFileSystem
[ScalableFileSystem]
name=Instructor ScalableFileSystem Repository
baseurl=ftp://172.25.99.250/pub/ScalableFileSystem
gpgcheck=1
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-redhat-release
2.安装
服务端：
yum install -y luci
[root@redhat5 ~]# /etc/init.d/luci start
Adding following auto-detected host IDs (IP addresses/domain names), corresponding to `redhat4.example.com' address, to the configuration of self-managed certificate `/var/lib/luci/etc/cacert.config' (you can change them by editing `/var/lib/luci/etc/cacert.config', removing the generated certificate `/var/lib/luci/certs/host.pem' and restarting luci):
(none suitable found, you can still do it manually as mentioned above)
Generating a 2048 bit RSA private key
writing new private key to '/var/lib/luci/certs/host.pem'
Starting saslauthd: [ OK ]
Start luci... [ OK ]
Point your web browser to https://redhat5.example.com:8084 (or equivalent) to access luci
[root@redhat5 ~]# chkconfig luci on
客户端：(redhat3 redhat4)
yum install -y ricci
[root@redhat3 ~]# /etc/init.d/ricci start
Starting system message bus: [ OK ]
Starting oddjobd: [ OK ]
generating SSL certificates... done
Generating NSS database... done
Starting ricci: [ OK ]
[root@redhat3 ~]# chkconfig ricci on
给ricci一个密码：
echo westos | passwd --stdin ricci

2创建集群

密码是redhat5的root密码
创建一个集群：
<下面应该写redhat3.example.com 和 redhat4.example.com,,截图>









如果有节点是红的（未加入集群的），肯定是缺少配置文件，就从正常的节点拷贝配置文件到没有加入集群的节点。

3配置fence

1.在真机foundation11上安装fence

<不装图形的话，就不会安装NetworkManager>

2创建fence :

主要是修改一下br0

3.创建fence

_[root@foundation99 ~]# cd /etc/
[root@foundation99 etc]# mkdir cluster
[root@foundation99 etc]# cd cluster/
[root@foundation99 cluster]# dd if=/dev/urandom of=/etc/cluster/fence_xvm.key bs=1024 count=1
1+0 records in
1+0 records out
1024 bytes (1.0 kB) copied, 0.000234166 s, 4.4 MB/s
[root@foundation99 cluster]# ls
fence_xvm.key
把这个key拷贝到集群中的ricci节点：
[root@foundation99 cluster]# scp fence_xvm.key root@172.25.99.3:/etc/cluster/fence_xvm.key

4.启动fence

systemctl start fence_virtd.service

使用fence
在server6上把server5 fence掉
就相当于把server5 断电然后重启。注意，-H后面接的是 virtual machine manager里面的名字。不一定是hostname

















里面写server3 server4的uuid
实验结果：
如果：[root@redhat3 ~]# ifconfig eth0 down
那fence会把redhat 3关闭，然后重启。
如果：[root@redhat3 ~]# echo c > /proc/sysrq-trigger
内核会崩溃，redhat3也会关闭并重启。



配置文件会自动添加下面的行：
[root@redhat6 cluster]# ls
cluster.conf cman-notify.d fence_xvm.key
[root@redhat6 cluster]# cat cluster.conf

4.在集群上配置http服务

1．添加Failover Domains

2．添加resources

这些在配置文件/etc/cluster/cluster.conf 里面都会有的：

3．添加Resource Groups

点上面这个 “Add Resource”添加刚才添加的resource. 一个IP 一个httpd

4．实验结果：

5在集群上部署iscsi