Recent Posts

Puppet – How to install and configure Puppet Agent (Client) ?

Login Page - Puppet

Once you have configured the Puppet Server, you can start adding the puppet agents to it. This article will brief about installing and configuring the puppet agent on Linux systems (RHEL 7 and Ubuntu 14.04).  Puppet agents are nothing but the client machines which will regularly pulls configuration catalogs from a Puppet master and applies them to the local system. Puppet …

Read More »

Puppet – How to install and configure Puppet Enterprise (Master) ?

LOGO - Puppet Master

This article is going to brief about the Puppet Server – Enterprise installation and configuration. We are going to install the puppet server  in monolithic mode. In monolithic installation, Puppet Master , Puppet console , Puppet DB will be installing on one node. This is the simple method to evaluate puppet enterprise and you can manage up to 500 puppet agent nodes. To know more about …

Read More »

Puppet – Configuration Management Software – Overview

Large Split Installation

Puppet  is an open-source configuration management / IT automation software that allows system administrators to programmatically provision, configure, and manage servers, network devices, and storage, in a datacenter or in the cloud. Puppet is written on RUBY language and it is produced by Puppet Labs.  Configuration Management tools uses either push or pull methods. Puppet uses pull method. In this method, puppet agents …

Read More »

RHEL7 – Configuring GFS2 on Pacemaker/Corosync Cluster

GFS2 - RHEL 7

This article will briefly explains about configuring the GFS2 filesystem between two cluster nodes. As you know that GFS2 is cluster filesystem and it can be mounted on more than one server at a time . Since multiple servers can mount the same filesystem, it uses the DLM (Dynamic Lock Manager) to prevent the data corruption. GFS2 requires a cluster suite …

Read More »

RHEL 7 – How to configure the Fencing on Pacemaker ?

RHEL 7 STONITH

Fencing (STONITH) is an important mechanism in cluster to avoid the data corruption on shared storage. It also helps to bring the cluster into the known state when there is a split brain occurs between the nodes. Cluster nodes talks to each other over communication channels, which are typically standard network connections, such as Ethernet. Each resources and nodes have “state” …

Read More »

RHEL 7 – Accessing the Pacemaker WEB UI (GUI) – Part 11

Add the pacemaker cluster to Web UI

Pacemaker offers web based user interface portal to manage the cluster. It also provides an interface to manage multiple clusters in single web UI. We can’t really say that WEB UI has all the options to manage the cluster. I would say that command line is much easier and simple when you compare to GUI. However , you could give a try …

Read More »