规划设计 操作系统安装 群集组件安装 群集节点准备 2创建VIP资源 3创建Web/Apache资源 4配置约束 5群集测试
1.准备工作（重要）
群集组件和节点的准备我在另一张博客中已经介绍，可以参考
https://blog.csdn.net/qq_45714272/article/details/106017375
[root@rs1 corosync]# crm_verify -L -V ## 检查配置有无错误 禁用stonish [root@rs1 corosync]# pcs property set stonith-enabled=false
2.创建vip资源
[root@rs1 corosync]# pcs resource create VirtualIP ocf💓IPaddr2 ip=192.168.43.100 cidr_netmask=24 op monitor interval=30s
创建VIP资源如果不生效，只要禁用掉stonish设备即可
pcs property set stonith-enabled=false
[root@rs1 ~]# pcs resource create VirtualIP ocf:heartbeat:IPaddr2 ip=192.168.43.100 cidr_netmask=24 op monitor interval=30s[root@rs1 ~]# pcs status [root@rs1 ~]# ip a 1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1000 link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00 inet 127.0.0.1/8 scope host lo valid_lft forever preferred_lft forever inet6 ::1/128 scope host valid_lft forever preferred_lft forever 2: ens32: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP group default qlen 1000 link/ether 00:0c:29:46:eb:23 brd ff:ff:ff:ff:ff:ff inet 192.168.43.10/24 brd 192.168.43.255 scope global noprefixroute ens32 valid_lft forever preferred_lft forever inet6 fe80::a0b8:9a41:6d1b:7285/64 scope link noprefixroute valid_lft forever preferred_lft forever 可以看出，添加的虚拟IP没有在rs1身上,我们禁用stonish设备 [root@rs1 ~]# pcs property set stonith-enabled=false [root@rs1 ~]# ip a 1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1000 link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00 inet 127.0.0.1/8 scope host lo valid_lft forever preferred_lft forever inet6 ::1/128 scope host valid_lft forever preferred_lft forever 2: ens32: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP group default qlen 1000 link/ether 00:0c:29:46:eb:23 brd ff:ff:ff:ff:ff:ff inet 192.168.43.10/24 brd 192.168.43.255 scope global noprefixroute ens32 valid_lft forever preferred_lft forever inet 192.168.43.100/24 brd 192.168.43.255 scope global secondary ens32 valid_lft forever preferred_lft forever inet6 fe80::a0b8:9a41:6d1b:7285/64 scope link noprefixroute valid_lft forever preferred_lft forever 成功啦！
详细介绍可以看我另一篇博客
https://blog.csdn.net/qq_45714272/article/details/106007691
开始用pcs创建资源：
创建Web/Apache资源（节点都要做） 开两台虚拟机，安装以下服务，并配置。如下： firewall-cmd --permanent --add-service=http && firewall-cmd --reload yum install -y httpd echo "$(hostname)" >> /var/www/html/index.html systemctl restart httpd systemctl enable httpd 创建Apache状态URL(节点都要做) vim /etc/httpd/conf.d/status.conf <location /server-status> setHandler server-status Order deny,allow deny from all Allow from 127.0.0.1 </location>
创建Apache资源
pcs resource create Website ocf💓apache configfile=/etc/httpd/conf/httpd.conf statusurl=“http://localhost/server-status” \ op monitor interval=1min
删除Apache资源
pcs resource delete Website
查看状态
[root@rs1 ~]# pcs status Cluster name: cluster1 Stack: corosync Current DC: rs1 (version 1.1.20-5.el7-3c4c782f70) - partition with quorum Last updated: Fri May 8 10:27:09 2020 Last change: Fri May 8 10:26:53 2020 by root via cibadmin on rs1 2 nodes configured 2 resources configured Online: [ rs1 rs2 ] Full list of resources: VIP (ocf::heartbeat:IPaddr2): Started rs2 Website (ocf::heartbeat:apache): Starting rs1 Daemon Status: corosync: active/disabled pacemaker: active/disabled pcsd: active/enabled
无共享存储的web群集就搭建好了，我们可以通过VIP来访问web群集，一台服务器宕机，我们可以利用pcs工具对VIP进行迁移，访问另一台服务器，实现了HA
对集群进行约束
确保资源在同一节点
1.添加约束确保资源在同一节点
[root@rs1 ~]# pcs constraint Location Constraints: Ordering Constraints: Colocation Constraints: Ticket Constraints: [root@rs1 ~]# pcs constraint colocation add Website with VirtualIP INFINITY [root@rs1 ~]# pcs status Cluster name: cluster1 Stack: corosync Current DC: rs1 (version 1.1.20-5.el7-3c4c782f70) - partition with quorum Last updated: Fri May 8 10:51:57 2020 Last change: Fri May 8 10:51:52 2020 by root via cibadmin on rs1 2 nodes configured 2 resources configured Online: [ rs1 rs2 ] Full list of resources: VirtualIP (ocf::heartbeat:IPaddr2): Started rs1 Website (ocf::heartbeat:apache): Starting rs1 Daemon Status: corosync: active/disabled pacemaker: active/disabled pcsd: active/enabled
2.IP飘逸
[root@rs1 ~]# ip a 1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1000 link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00 inet 127.0.0.1/8 scope host lo valid_lft forever preferred_lft forever inet6 ::1/128 scope host valid_lft forever preferred_lft forever 2: ens32: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP group default qlen 1000 link/ether 00:0c:29:46:eb:23 brd ff:ff:ff:ff:ff:ff inet 192.168.43.10/24 brd 192.168.43.255 scope global noprefixroute ens32 valid_lft forever preferred_lft forever inet6 fe80::a0b8:9a41:6d1b:7285/64 scope link noprefixroute valid_lft forever preferred_lft forever [root@rs1 conf.d]# pcs cluster standby rs1 [root@rs2 ~]# ip a 1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1000 link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00 inet 127.0.0.1/8 scope host lo valid_lft forever preferred_lft forever inet6 ::1/128 scope host valid_lft forever preferred_lft forever 2: ens32: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP group default qlen 1000 link/ether 00:0c:29:01:55:ac brd ff:ff:ff:ff:ff:ff inet 192.168.43.20/24 brd 192.168.43.255 scope global noprefixroute ens32 valid_lft forever preferred_lft forever inet 192.168.43.100/24 brd 192.168.43.255 scope global secondary ens32 valid_lft forever preferred_lft forever inet6 fe80::a0b8:9a41:6d1b:7285/64 scope link tentative noprefixroute dadfailed valid_lft forever preferred_lft forever inet6 fe80::1777:3e7e:f136:6cf/64 scope link noprefixroute valid_lft forever preferred_lft forever [root@rs1 ~]# pcs status Cluster name: cluster1 Stack: corosync Current DC: rs1 (version 1.1.20-5.el7-3c4c782f70) - partition with quorum Last updated: Sat May 9 02:08:53 2020 Last change: Sat May 9 02:08:47 2020 by root via cibadmin on rs1 2 nodes configured 1 resource configured Node rs1: standby Online: [ rs2 ] Full list of resources: VirtualIP (ocf::heartbeat:IPaddr2): Started rs2 Daemon Status: corosync: active/disabled pacemaker: active/disabled pcsd: active/enabled
恢复：
[root@rs1 ~]# pcs cluster unstandby rs1 [root@rs1 ~]# pcs status Cluster name: cluster1 Stack: corosync Current DC: rs1 (version 1.1.20-5.el7-3c4c782f70) - partition with quorum Last updated: Sat May 9 02:11:31 2020 Last change: Sat May 9 02:11:23 2020 by root via cibadmin on rs1 2 nodes configured 1 resource configured Online: [ rs1 rs2 ] Full list of resources: VirtualIP (ocf::heartbeat:IPaddr2): Started rs2 Daemon Status: corosync: active/disabled pacemaker: active/disabled pcsd: active/enabled
3.先后顺序
[root@rs1 conf.d]# pcs constraint order VirtualIP then Website Adding VirtualIP Website (kind: Mandatory) (Options: first-action=start then-action=start) [root@rs1 conf.d]# pcs constraint Location Constraints: Ordering Constraints: start VirtualIP then start Website (kind:Mandatory) Colocation Constraints: Ticket Constraints:
4.优先级
[root@rs1 conf.d]# pcs constraint location Website prefers rs1=50 [root@rs1 conf.d]# pcs constraint location Website prefers rs2=100
5.指定
配置排列约束，让vip与web 资源运行在一起，分数为100 [root@node1 ~]# pcs constraint colocation add vip with web 150 [root@rs1 conf.d]# pcs constraint colocation add VirtualIP with Website 100
