Writing cookbook on Microsoft Azure

This is the fourth post in the Chef and Microsoft Azure blog series. You can read the previous ones at:

  1. https://manesh.me/2015/10/17/setup-chef-workstation-on-microsoft-azure/
  2. https://manesh.me/2015/10/19/setup-chef-server-on-microsoft-azure/
  3. https://manesh.me/2015/10/20/setup-chef-node-on-microsoft-azure/

Writing cookbook is similar to how you would write it on other infrastructure. To get started with cookbook on Azure, I am exploring a cookbook to setup apache web server and show home page. Also, this will show you how to upload cookbook to the Chef Server, and set the run list for Chef Node via knife. This blog focus on getting your first cookbook on Azure. This do not go into details of cookbook components, if you would like to learn more about that refer https://docs.chef.io/cookbooks.html and https://learn.chef.io/manage-a-web-app/ubuntu/

Prerequisites

  • Microsoft Azure Subscription
  • Have gone through previous three posts in the series

Setup Sequence

  • Create cookbook on workstation
  • Upload cookbook to server
  • Add cookbook to run list of node
  • Run chef-client on node
  • Enable endpoint using Azure CLI

Create cookbook on Workstation

Execute the following commands from the workstation.

# move to home directory

cd

# move to chef-repo directory in home

cd chef-repo

# create new cookbook named webserver

knife cookbook create webserver

Edit the default recipe for webserver and update content of the file to following. vim editor comes default in the instance, so you could use that. To start inserting text in vim, press the ‘i’ key to enter insert mode. When you have finished editing, press ESC to exit insert mode, then type ‘:wq’ to save and exit the editor.

# edit the default recipe

vim cookbooks/webserver/recipes/default.rb

Add index.html file to cookbook’s files/default directory and edit the content.

edit the default index file

vim cookbooks/webserver/files/default/index.html

Upload cookbook to Server

Execute the following commands from the workstation.

# move to home directory

cd

# move to chef-repo directory in home

cd chef-repo

# upload the cookbook to Chef Server

knife cookbook upload webserver

Add cookbook to run list of node

Execute the following commands from the workstation.

# move to home directory

cd

# move to chef-repo directory in home

cd chef-repo

# Add cookbook to the run list of node

knife node run_list add mme-chef-node1 “recipe[webserver]”

Run chef-client on node

Execute the following commands from the Chef Node.

# running chef-client on mme-chef-node1

sudo chef-client

# Ensure that webserver is available on port 80

curl http://localhost/

We have created and executed our first runbook on Azure now. You can learn more about cookbooks from http://learn.chef.io/

Enable endpoint using Azure CLI

We have tested and ensured that web server is running and default index file is returned correctly. However, if you try out http://mme-chef-node1.cloudapp.net/ , the public endpoint 80 of the webserver, you will not get any contents. This is because we only have port 22 in the endpoints of Azure VM. To enable port 80 using Azure CLI, follow the below commands from workstation node.

Login to Azure CLI using your preferred option (Microsoft Account, Organizational Account or Service Principal), following the blog https://manesh.me/2015/10/15/options-for-azure-cli-logins-step-by-step-guidance/

Once you are logged into Azure CLI, execute the following command to check the current details of the virtual machine. Check endpoint information from the result.

Create new endpoint on port 80. Keep both public port and private port to be 80.

Now we can browse to http://mme-chef-node1.cloudapp.net/ and see that index page is available.

Next Blog

With this blog, we have gone through the basics of working with Chef on Microsoft Azure. In the next series of blogs, I will dive deep into using Azure specific knife commands and using Chef along with Azure Resource Manager templates.

About Manesh

Manesh is a software consultant and solutions architect specializing in cloud, data, Linux and devops in the azure realm with key focus on hybrid workloads. He has been working on Azure technologies since its inception and has helped many enterprises to onboard and adapt to Azure cloud, build solutions for datacenter scale / high consumer applications and services. Currently, he is Microsoft certified for Developing Microsoft Azure Solutions (70-532), Implementing Microsoft Azure Infrastructure Solutions(70-533) and Architecting Microsoft Azure Solutions (70-534).

Posted on 2015/10/23, in DevOps, Microsoft Azure and tagged , , , , , . Bookmark the permalink. 1 Comment.

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