PCS Cluster is required for:
If the system does not contain redundancy, do not install this.
Install the PCS packages:
yum -y install pacemaker pcs resource-agents fence-agents-all systemctl enable pcsd systemctl enable corosync systemctl enable pacemaker systemctl start pcsd.service |
Disable smb since this will be managed by pacemaker:
systemctl disable smb |
Next configure the firewall for ha services:
firewall-cmd --zone=public --add-service=high-availability --permanent firewall-cmd --reload |
Change the password of the hacluster user (replace <password> with the chosen password):
echo <password> | passwd --stdin hacluster |
Next configure the names of the machines and the virtual IP address which will be shared in the cluster:
KE_HOST1=uk-acd-store1 KE_HOST2=uk-acd-store2 |
Now configure the cluster and set some basic options - replace <password> with the chosen password:
pcs cluster auth ${KE_HOST1} ${KE_HOST2} -u hacluster -p <password> --force pcs cluster setup --force --name portal ${KE_HOST1} ${KE_HOST2} pcs cluster enable --all pcs cluster start --all pcs property set stonith-enabled=false pcs property set no-quorum-policy=ignore pcs resource defaults migration-threshold=1 |
Check the results on both machines:
pcs status # It might take a little time for the cluster to come online. Run the above command, until the cluster comes online on both nodes. --> Cluster name: portal Stack: corosync Current DC: uk-acd-store2 (version 1.1.16-12.el7_4.8-94ff4df) - partition with quorum Last updated: Mon Mar 19 15:24:25 2018 Last change: Mon Mar 19 15:24:20 2018 by hacluster via crmd on uk-acd-store2 2 nodes configured 0 resources configured Online: [ uk-acd-store1 uk-acd-store2 ] No resources Daemon Status: corosync: active/enabled pacemaker: active/enabled pcsd: active/enabled |