pacemaker

• Chapter 2. Getting started with Pacemaker Red Hat Enterprise Linux 8 | Red Hat Customer Portal
• CentOS 7 – HA 實作 (Pacemaker + Corosync) (更新內容-2022-1104) – Ken Wu
• How To Set Up an Apache Active-Passive Cluster Using Pacemaker on CentOS 7 | DigitalOcean
• Linux • 無限: High-Availability 的搜尋結果
• Fencing in a Red Hat High Availability Cluster - Red Hat Customer Portal
• web gui
  • Chapter 9. Getting started with the pcsd Web UI Red Hat Enterprise Linux 8 | Red Hat Customer Portal
• xcat
  • Setup xCAT HA Mgmt with NFS pacemaker and corosync — xCAT 2.16.5 documentation
• error
  • Virtual IP
    • "ERROR: [findif] failed" shown in Pacemaker - Red Hat Customer Portal
    • pacemaker - PCS resource ipaddr2 failed to start with exitreason='[findif] failed' - Stack Overflow

sudo vim /etc/corosync/corosync.conf
sudo vim /etc/httpd/conf.d/status.conf

---
# LoadModule status_module modules/mod_status.so
<Location /server-status>
SetHandler server-status
Order deny,allow
Deny from all
Allow from 127.0.0.1
Allow from ::1
</Location>
---

curl http://localhost/server-status
curl http://167.22.10.3/

sudo pcs resource remove ClusterIP
sudo pcs resource remove WebSite
sudo pcs resource create ClusterIP ocf:heartbeat:IPaddr2 ip=167.22.10.3 cidr_netmask=16 op monitor interval=20s --group apachegroup
sudo pcs resource create WebSite ocf:heartbeat:apache configfile=/etc/httpd/conf/httpd.conf statusurl="http://localhost/server-status" op monitor interval=20s --group apachegroup
sudo pcs resource create WebSite ocf:heartbeat:apache configfile=/etc/httpd/conf/httpd.conf statusurl="http://localhost/server-status" --group apachegroup

sudo pcs status

sudo pcs resource cleanup WebSite
sudo pcs resource debug-start WebSite --full

sudo pcs node standby s8cn001
sudo pcs node unstandby s8cn001


sudo pcs cluster stop --all

# fence
sudo pcs stonith status