PCS Cluster is required for:
- The role LB (Load Balancer), if two load balancers are used for redundancy
- The role STORE (file storage), if two file stores are setup using DRBD for redundancy
Install PCS Services
Install the PCS packages:
Install 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 Managed Services
Disable smb and haproxy since these services will be moved and managed by pacemaker:
Disable smb and haproxy
systemctl disable smb systemctl disable haproxy
Configure the Firewall
Next configure the firewall for ha services:
Configure firewall
firewall-cmd --zone=public --add-service=high-availability --permanent firewall-cmd --reload
Configuration
Next configure the names of the machines and the virtual IP address which will be shared in the cluster:
Setup hosts and create user and password
KE_HOST1=uk-acd-store1 KE_HOST2=uk-acd-store2 KE_VIP=10.4.8.22 useradd -m hacluster echo fireball | passwd --stdin hacluster
Cluster Configuration
Now configure the cluster and set some basic options:
Configure cluster
pcs cluster auth ${KE_HOST1} ${KE_HOST2} -u hacluster -p fireball --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
Test
Check the results:
Test
pcs status