Added new lesson

Author: kenerwin88

_layouts/homepage.html

@@ -14,14 +14,15 @@ <h3 class="h h--1">Hello,  Welcome to the DevOps Library!</h3>
                 </div>
              </div>
              <div class="g collection collection--centered collection--m--1of2 collection--l--1of3 mbm">
-               {% assign categories = "Jenkins|SaltStack|Vagrant|ELK|PowerShell|Linux|Docker" | split: "|" %}
+               {% assign categories = "Jenkins|SaltStack|DevOps|Vagrant|ELK|PowerShell|Linux|Docker" | split: "|" %}
                {% assign categoryDescriptions = "In a nutshell, Jenkins is the leading open source automation server. Built with Java, it provides hundreds of plugins to support building, testing, deploying and automation for virtually any project.|
                                                  Become a Salt master, and rule over your minions. Configuration Management from start to finish.|
+                                                 We're going to use a story to illustrate how to solve real world problems using DevOps tooling and concepts.|
                                                  Vagrant enables users to create and configure lightweight, reproducible, and portable development environments.|
                                                  By combining the massively popular Elasticsearch, Logstash and Kibana, you can create an open source logging Platform that's not only beautiful, but scales as well!|
                                                  PowerShell is the most powerful automation tool that Microsoft has to offer, and its both a shell and a scripting language.|
                                                  Want to brush up on your Linux skills?  Here you go!|
-                                                 Docker is an open platform for developers and sysadmins to build, ship, and run distributed applications, whether on laptops, data center VMs, or the cloud." | split: "|" %}
+                                                 Docker is an open platform for developers and sysadmins to build, ship, and run distributed applications, whether on laptops, data center VMs, or the cloud. |" | split: "|" %}
                {% for category in categories %}
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_posts/2016-28-16-DevOps For Beginners Introduction.markdown

@@ -0,0 +1,225 @@
+---
+layout: post
+title:  "DevOps for Beginners Introduction"
+date:   2016-7-28 12:00:00 -0500
+categories: DevOps
+permalink: lessons/devops-introduction
+excerpt: "Introduction to the course, and our imaginary webapp company: Montonomy.com."
+weight: 1
+image: 'devops.png'
+
+---
+{% include youtube.html id="v7ZcZfGBFcU" %}
+
+Introduction
+------------
+This is Samantha with the DevOps Library, and today I'd like to welcome you to
+our new DevOps for Beginners Course!  This course is going to be a little bit
+different from our normal videos.  We're going to use a story to illustrate how
+to solve real world problems using DevOps tooling and concepts.
+
+Imagine you've just started working for a web based company that's desperately
+trying to scale.  We'll start out with the basics, but by the end of this
+course, you'll be ready to deploy, monitor, and scale applications in the real
+world.
+
+Thank you Datadog
+-----------------
+Before we begin, we'd like to give a quick shout out to
+[Datadog](http://dtdg.co/devops-library) for sponsoring this video.  With their
+help, we're able to keep our videos free, and we even use them personally for
+our servers.  By using [Datadog's](http://dtdg.co/devops-library) cloud-scale
+monitoring, you can easily track your dynamic infrastructure.  
+
+If you haven't tried them out, visit
+[dtdg.co/devops-library](http://dtdg.co/devops-library), you'll even get a 14
+day free trial!
+
+Alright, back to our lesson
+
+Day 1
+-----
+You’ve spent most of the day so far just getting to know the team.  Kevin, one
+of the guys from the build team, volunteers to teach you and Ron how to set up
+the Montonomy webapp.  Well, as soon as he finishes an email to QA about the
+last night's release that is.
+
+Emergency
+---------
+Suddenly everything changes.  Your boss Steve, begins shouting across the room
+
+> "OMG CHECK the homepage, CHECK the homepage!".
+
+![Error](/images/408.jpg)
+
+Before you've even opened up your browser, 3 people have already screamed
+"408!!!".  Seconds later the roar has died down as everyone scrambles to figure
+out what's causing the website to timeout.
+
+An unspoken awareness of thousands of angry customers falls over you, and
+permeates the room.  You quickly SSH into one of the web servers, and after a
+few dead ends, decide to run 'top'.
+
+Good God, the server's CPU is pegged at 100%.
+
+Quickly you run over to let Steve know.  Without even saying a word, the look of
+sadness and fear on his face tells you the solution isn't going to be easy.
+
+Using sorcery, or as Steve calls it Perl, the status of each web server pops up
+on the screen.  Every single one is maxed out.
+
+Steve then proceeds to address the team:  
+
+> "I need 2 more Web Servers ASAP!
+
+Justin, Chris, move as fast as you can, and can someone look into why we're
+being hit so hard?!".
+Seems like a pretty easy fix right? A few minutes later it dawns on you why
+everyone is still panicking.  
+
+...the servers are being configured by hand.
+
+Day 2
+-----
+Flashing forward to Day 2.  
+
+Things have been going quite a bit better, the website's up, and Justin even
+brought in donuts.  Steve is currently out explaining to the marketing team why
+sending a 50% off coupon to 1.5 million members without a heads up was a bad
+idea, and Kevin is finally going to show you and Ron how to set up the company's
+app.
+
+Cloning the App
+---------------
+> "So the first thing you guys need to do is to clone our main app repository,
+> which is hosted on Github.  Are you both pretty comfortable with git?"
+
+You and Ron both nod, although you suspect Ron is lying.
+
+[https://github.com/devopslibrary/devops-demo](https://github.com/devopslibrary/devops-demo)
+
+> "Awesome!  Well, we only need two files from the repo, the devops-demo.sql
+> script, which we'll use to set up the database, and the devops-demo.tar.gz file,
+> which goes on the webserver."
+
+Before Kevin can continue, Ron stands up and says
+
+>"I get it"
+
+then wanders off.  Kevin sighs
+
+> "He doesn't get it, he hasn't gotten anything.  Of everyone, he
+> should definitely be listening.  Let's put it this way, he's like a human
+> [chaos monkey](http://techblog.netflix.com/2012/07/chaos-monkey-released-into-wild.html)".
+
+Unsure of what to say, you ask what to do next.  
+
+> "Ah sorry, he's not that bad.  
+> Anyway, login to AWS with the creds I emailed you earlier.  I went ahead and
+> already spun up two Ubuntu 14.04 instances.  We'll use one as a MySQL server
+> for the Montonomy backend, and the second for the frontend.”
+
+After SSHing into both servers, Kevin has you pull up an [Evernote](http://www.evernote.com/l/AnvdBaIF3MpERJT4bOdzuQA6ZIC_ZHn2AJA/) with each
+of the steps listed.  
+
+> Alright, so when you're doing these steps, make sure
+> you're running as root.  I also like to do an apt-get update before doing
+> anything else.  Now install MySQL.  Type:
+
+```
+apt-get install mysql-server
+```
+
+Before you can continue, MySQL pops up asking for a password.
+
+> "At this point, you'll want to use our standard password or you'll have to edit
+> the SQL script, let me find it real quick".
+
+Kevin then opens up **Keepass** on his laptop, and after a minute or two tells
+you to type in "**devpass**".
+
+> "Perfect!" Kevin says, "Now you just need to run a few lines to configure MySQL.  
+> They're pretty long, do you want me to type them real quick?"
+
+You nod, then Kevin types:
+
+```
+mysql -uroot -pdevpass -e "create database devopsdb"
+```
+
+> "Alright, so that line creates the database, now I just need to upload the SQL
+> script from the repo and run it, one moment".
+
+*Kevin SCPs the SQL script to the server*, then runs:
+
+```
+mysql -uroot -pdevpass devopsdb < devops-demo-1.0.sql
+```
+
+> "Alright, we're just about set on this server, but you still need to set the
+> bind address to allow any host, otherwise the webserver won't be able to
+> connect.  Are you pretty familiar with MySQL?"
+
+You nod, and pull up **/etc/mysql/my.cnf** in VIM.  After commenting out the
+bind address, you run **service mysql restart** to apply the changes.
+
+Kevin smiles, then says
+
+>"Thank the gods, you don't use nano, I knew we hired the right person.".
+
+You don't mention it, but you were using **nano** up until a few months ago
+until after you spent a day playing [VIM Adventures](http://www.vim-adventures.com).
+
+> "Now onto the last part, we still need to set up the webserver.  
+> Unfortunately, I have a meeting with Todd I need to go to.  I'm trying to get
+> him onboard with using Jenkins, but he's been pretty much against changing
+> anything.  If you have time, just follow the rest of the Evernote and let me
+> know later if you have any questions.  Oh yeah, and make sure you note down
+> the IP address of the SQL server, you'll need it for the config.ini file on
+> the app."
+
+Kevin walks off and for the first time today you're on your own.  You pull up
+[Evernote](http://www.evernote.com/l/AnvdBaIF3MpERJT4bOdzuQA6ZIC_ZHn2AJA/)
+alongside the web server terminal and start running through the steps.
+
+1. Do an apt-get update then run: ```apt-get install apache2 php5 php5-mysql```
+2. Delete everything from /var/www/html.
+3. Upload the devops-demo-1.0.tar.gz file to the server, once it finishes,
+extract the files to /var/www/html.
+4. Open up a web browser and go to the public IP of the server, verify that the
+page comes up.
+
+After opening up the page, you notice that it DOES come up, however the database
+connection fails.  Unfortunately, that's the last step in the [Evernote](http://www.evernote.com/l/AnvdBaIF3MpERJT4bOdzuQA6ZIC_ZHn2AJA/).  
+
+Thankfully, Max doesn't look too busy so you ask him for help.
+
+> "Ahhh... we really need to update that guide, you're good to go on the
+> infrastructure part, but you still need to set the config variables.  Open up
+> **/var/www/html/config.ini.**
+> Replace DBHost with the IP of whatever database you set up, SQLUser with
+> "**root**", and SQLPassword with **devpass** unless Kevin had you use something else.  
+> For the SQL DB Name, set it to **devopsdb**."
+
+"What do I use for ENV?" you ask Max.  
+
+> "Ah, make sure you use DEV, that way the app doesn't point to any of our
+> production stuff.  That should be it, refresh the page to make sure"
+
+![Overview](/images/overview.png)
+
+Success!  Thanks to Max and Kevin's help, you've just learned how to set up the
+app!  While we know setting the app up by hand was painful, don't worry, in the
+next episode we'll automate the process.  I know this style is quite a bit
+different from what we normally do, please let us know in the comments if you
+like it or would prefer us to focus on our normal videos.
+
+If you have a real world problem you'd like us to address in the story, let us
+know and we'll do our best to add it!  If you like our videos, please subscribe
+to our [YouTube channel](https://www.youtube.com/channel/UCOnioSzUZS-ZqsRnf38V2nA?sub_confirmation=1)!  
+
+[Subscribe to our YouTube channel](https://www.youtube.com/channel/UCOnioSzUZS-ZqsRnf38V2nA?sub_confirmation=1) or follow [DevOpsLibrary on Twitter](https://twitter.com/intent/user?screen_name=devopslibrary).  
+
+{% include subscribe.html %}
+
+Thank again and see you soon.