GSTN - Printer HA

Printer HA(High Availability)

Date : 12.09.2016

Document Version : 1.0

Table of Contents:Installing Redhat Cluster Software4

1. YUM Repository configuration.4

Installing Cluster Packages on Nodes5

Enable & Start  the Services on both the Nodes:6

Configure corosync & Create new cluster:7

Template:Anchor Installing Redhat Cluster Software

Redhat cluster software (Pacemaker) is available in the RHEL 7.2 ISO image as an Add-on Package so I have installed cluster software from local repository.

Template:Anchor 1. YUM Repository configuration.

To configure local repository create a file /etc/yum.repos.d/local.repo and make below entries on both nodes.

In this configuration baseurl is shared through http.

[local]

name=local

baseurl=http://172.18.102.14/RHEL7.2/

gpgcheck=0

enabled=0

[repo-ha]

gpgcheck=0

enabled=0

baseurl=http://172.18.102.14/RHEL7.2/addons/HighAvailability

name=repo-ha

[repo-storage]

gpgcheck=0

enabled=0

baseurl=http://172.18.102.14/RHEL7.2/addons/ResilientStorage

name=repo-storage

Template:Anchor 2. Installing Cluster Packages on Nodes

Login to the RHEL 7.2 node as root user. Execute the following command to install the cluster packages and it’s dependencies. Corosync will install along with pacemaker.

#yum install pacemaker pcs

Template:Anchor 3. Enable & Start  the Services on both the Nodes:

Login to both the cluster nodes as root user.

Enable the pcsd daemon on both the nodes to start automatically across the reboot.

# systemctl start pcsd.service

# systemctl enable pcsd.service

# systemctl status pcsd.service

Set the new password for cluster user “hacluster” on both the nodes.

On frist node:

# passwd hacluster

On second node:

# passwd hacluster

Template:Anchor 4. Configure corosync & Create new cluster:

Login to any of the cluster node and authenticate “hacluster” user.

# pcs cluster auth gd9103 gd9104

Create a new cluster using pcs command.

# pcs cluster setup –name PrinterCL gd9103 gd9104

Start the cluster using pcs command. “–all” will start the cluster on all the configured nodes.

# pcs cluster start --all

Check the cluster services status.

# pcs cluster status

Check the corosync communication status.

Print server cluster IPV4 is 172.18.101.33 and IPV6 is 2404:a800:1000:d:7800::21.

To manage cluster open web GUI link https://gdprinter.gstn.local:2224.