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In this post, we will set up ElasticSearch, Logstash  and Kibana  to analyse Apache Tomcat server logs. Before setting up ELK stack, let’s have a brief about each. ElasticSearch Schema-less database that has powerful search capabilities and is easy to scale horizontally. Indexes every single field, aggregate and group the data. Logstash Written in Ruby and allows us to pipeline data ...

We’ve been playing around with vagrant for local development.   When combined with Ansible, the pair allows you to recreate complex systems locally with high fidelity to your deployment environment. Through magic voodoo (kudos to @jjpersch and @kmolendyke), we managed to get an Amazon AMI crammed into a virtual box.  Unfortunately, Amazon’s yum repos are only available from the EC2 network. ...

Running the Application Server as a service or daemon on the machine ensures that service restart automatically when the machine reboots and also provides the capability to start the server with a UNIX shell. In this post, we will create Weblogic  server as a service making it to start at machine reboot in few steps as follows: Step 1: Create ...

Some time ago I wrote a post on linux productivity tools I use. As from time to time I need to install new machine that would benefit from the synced rc files, I’ll document the steps required (as rediscovering it every time is rather a waste of time). What I’d need I’ll use the previously introduced: oh-my-zsh homeshick vim’s vundle ...

I like to use Cygwin for having a bash shell on a windows machine. In combination with Console2 you have a powerful command-line tool for windows. I’d like to describe how to install Cygwin and Console2 under windows 7 (I think this instruction works on Windows XP, too) and how to embed Cygwin in Console2. I used for Cygwin version ...

Tired of managing a full-blown DB server on your development machine ? Let’s give Docker a try! Getting started with Docker First, if your development machine is not running Linux (ie if you’re running windows or mac os x), it’s easier to use boot2docker to get started, since it will take care of installing: VirtualBox (if you already have it ...

Load balancer distributes incoming requests across multiple computing application servers. It aims to optimize resource use, maximize throughput, minimize response time, and avoid overload of any single resource. Nginx supports below load balancing mechanisms: Round-Robin — Requests to the application servers are distributed in a round-robin fashion. Least-Connected — Next request is assigned to the server with the least number of ...

1. Introduction In this example, we feature a comprehensive Linux chown Example. We will see how to use the Unix-like system command chown The chown command changes the owner and owning group of files. 1.1 Linux Machine If you are on Windows OS, before we get into the details of this command, I would suggest you to have a Linux machine ...