Instalacia pacemaker:

apt install -y pacemaker corosync crmsh

Nastavenie clustru corosync:

nano /etc/corosync/corosync.conf

# Totem Protocol Configuration
totem {
  version: 2
  cluster_name: hakase-cluster
  transport: udpu
 
# Interface configuration for Corosync
  interface {
    ringnumber: 0
    bindnetaddr: 10.0.15.0
    broadcast: yes
    mcastport: 5407
  }
}
 
# Nodelist - Server List
nodelist {
  node {
    ring0_addr: web01
  }
  node {
    ring0_addr: web02
  }
}
 
# Quorum configuration
quorum {
  provider: corosync_votequorum
}
 
# Corosync Log configuration
logging {
  to_logfile: yes
  logfile: /var/log/corosync/corosync.log
  to_syslog: yes
  timestamp: on
}
 
service {
  name: pacemaker
  ver: 0
}

Hosty web01 a web02 je potrebne nahrav v lokalnom DNS

Po spusteni sluzieb:

Nastavenie corosync & pacemaker:

crm configure property stonith-enabled=false
crm configure property no-quorum-policy=ignore

Vytvorenie flating IP

pcs resource create floating_ip ocf:heartbeat:IPaddr2 ip=147.232.103.6 cidr_netmask=28 op monitor interval=5s

Zmena nastavenia v:

nano /etc/systemd/system/multi-user.target.wants/pacemaker.service

TimeoutStopSec=30s

Nastavenie apache clustra:

pcs resource create WebServer ocf:heartbeat:apache configfile=/etc/apache2/apache2.conf statusurl="http://127.0.0.1/server-status" op monitor interval=20s

Nastavenie skupiny sluzieb:

crm configure group web_balancing WebServer floating_ip