![[Optional ] We can also bootstrap the node :
If we have any machine with public IP and its credentials
From knife we’ll bootstrap a node (e.g. EC2 Instance) with its public ip,
assign it a Chef Recipe and will run chef-client.
Bootstrap means it will connect to EC2 instance, will install chef-client
, copy validation key & client.rb and run chef-client. As we are passing
recipe name in bootstrap command it will also run the cookbook
recipe on node by putting recipe in its run list.](https://image.slidesharecdn.com/timetowritecookbook-150812095115-lva1-app6892/85/How-to-Write-Chef-Cookbook-12-320.jpg)
![Command :
knife bootstrap <machine_ip> -x user_name -i <key_path> -r
recipe[recipe_name] –sudo
For Example :
knife bootstrap <machineIP> -x ec2-user -i xyz.pem -r recipe[test] –
sudo](https://image.slidesharecdn.com/timetowritecookbook-150812095115-lva1-app6892/85/How-to-Write-Chef-Cookbook-13-320.jpg)
How to Write Chef Cookbook
- 1. Write your first cookbook step by step - Ishant Kumar
- 2. Here, we’ll talk about how to write your first cookbook step by step. If you are curious to know how to setup Chef Environment, you can always have a look in our slideshare slide Understand Chef. A cookbook is the fundamental unit of configuration and policy distribution. Each cookbook defines a scenario, such as everything needed to install and configure httpd server, and then it contains all of the components that are required to support that scenario.
- 3. Action Performed in order to write a cookbook and apply it to node : — create a new cookbook and add a recipe to it — upload your cookbook to the Chef server — configure your node’s run list — run chef-client to trigger the configuration process on your target node. Note : before doing any knife operation your current directory should be .chef directory
- 4. Create cookbook by passing the command #knife cookbook create webserver
- 5. You can see the contents of webserver cookbook by changing cookbooks directory like below So above image shows the directory structure of any typical chef cookbook.
- 6. Write the recipe by editing the file /cookbooks/webserver/recipes/default.rb
- 7. The code written above is nothing but Ruby DSL. The first block installs httpd server , second block starts the service and third block copies the file (index.html) from cookbook files directory to /var/www/html/ of web server.
- 8. Now lets edit the content of index.html Now your cookbook is ready to upload .
- 9. Run this command in order to upload it to server. #knife cookbook upload webserver Test the cookbook by running chef-client on the node which is already registered or ready to register. If you want to understand how to setup node, check our previous slideshare slide Understand Chef .
- 10. Output
- 11. After executing chef-client, we can test the sample site by hitting the public ip in the browser like below .
- 12. [Optional ] We can also bootstrap the node : If we have any machine with public IP and its credentials From knife we’ll bootstrap a node (e.g. EC2 Instance) with its public ip, assign it a Chef Recipe and will run chef-client. Bootstrap means it will connect to EC2 instance, will install chef-client , copy validation key & client.rb and run chef-client. As we are passing recipe name in bootstrap command it will also run the cookbook recipe on node by putting recipe in its run list.
- 13. Command : knife bootstrap <machine_ip> -x user_name -i <key_path> -r recipe[recipe_name] –sudo For Example : knife bootstrap <machineIP> -x ec2-user -i xyz.pem -r recipe[test] – sudo
- 14. This will install httpd server on machine and we can test the sample site by hitting the public ip in the browser like below .
- 15. Thanks Looking Forward for your interest in DevOpsJourney.com http://devopsjourney.com Email us: mail@devopsjourney.com