Editing GSTN - Printer HA

[[category:GSTN]]



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'''Printer HA(High Availability) '''

Date : 12.09.2016

Document Version : 1.0






Table of Contents:[[#RefHeading287469537016|Installing Redhat Cluster Software4]]

:[[#RefHeading289469537016|1. YUM Repository configuration.4]]

::[[#RefHeading291469537016|Installing Cluster Packages on Nodes5]]

::[[#RefHeading293469537016|Enable & Start  the Services on both the Nodes:6]]

::[[#RefHeading295469537016|Configure corosync & Create new cluster:7]]

== {{anchor|RefHeading287469537016}} 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.

== {{anchor|RefHeading289469537016}} 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''




<div style="color:#00000a;">[[Image:GSTNPRINTER1.png]]</div>

== {{anchor|RefHeading291469537016}} 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.

<nowiki>#yum install pacemaker pcs</nowiki>


<div style="color:#00000a;">[[Image:GSTNPRINTER2.png]]</div>

== {{anchor|RefHeading293469537016}} 3. Enable & Start  the Services on both the Nodes: ==

Login to&nbsp;both the cluster nodes as root user.

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

<div style="color:#00000a;">''<nowiki># systemctl start pcsd.service</nowiki>''</div>

<div style="color:#00000a;">''<nowiki># systemctl enable pcsd.service</nowiki>''</div>

<div style="color:#00000a;">''<nowiki># </nowiki>systemctl status pcsd.service''</div>


<div style="color:#00000a;">[[Image:GSTNPRINTER3.png]]</div>


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<div style="color:#00000a;">Set the new password for cluster user ''“hacluster”'' on both the nodes.</div>


<div style="color:#00000a;">On frist node:</div>

<div style="color:#00000a;">''<nowiki># passwd hacluster</nowiki>''</div>

<div style="color:#00000a;">[[Image:GSTNPRINTER4.png]]</div>

<div style="color:#00000a;">On second node:</div>

<div style="color:#00000a;">''<nowiki># passwd hacluster</nowiki>''</div>

<div style="color:#00000a;">[[Image:GSTNPRINTER5.png]]</div>

== {{anchor|RefHeading295469537016}} 4. Configure corosync & Create new cluster: ==

<div style="color:#00000a;">Login to any of the cluster node and authenticate “''hacluster”'' user.</div>

<div style="color:#00000a;">''<nowiki># pcs cluster auth gd9103 gd9104</nowiki>''</div>

<div style="color:#00000a;">[[Image:GSTNPRINTER6.png]]</div>

<div style="color:#00000a;">Create a new cluster using pcs command.</div>

<div style="color:#00000a;"><nowiki># </nowiki>''pcs cluster setup –name PrinterCL gd9103 gd9104''</div>

<div style="color:#00000a;">[[Image:GSTNPRINTER7.png]]</div>


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<div style="color:#00000a;">Start the cluster using pcs command. ''“–all” ''will start the cluster on all the configured nodes.</div>

<div style="color:#00000a;">''<nowiki># pcs cluster start --all</nowiki>''</div>

<div style="color:#00000a;">[[Image:GSTNPRINTER8.png]]</div>

<div style="color:#00000a;">Check the cluster services status.</div>

<div style="color:#00000a;">''<nowiki># pcs cluster status</nowiki>''</div>


<div style="color:#00000a;">[[Image:GSTNPRINTER9.png]]</div>


<div style="color:#00000a;">Check the corosync communication status.</div>

<div style="color:#00000a;">[[Image:GSTNPRINTER10.png]]</div>


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/ https://gdprinter.gstn.local:2224].'''